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Posted to notifications@skywalking.apache.org by gi...@apache.org on 2020/12/03 06:52:42 UTC
[skywalking-website] branch asf-site updated: Deploying to asf-site from @ f7a3a35f17184a0ecf9efbbb016c1b01f96c69f8 🚀
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The following commit(s) were added to refs/heads/asf-site by this push:
new 4190b3c Deploying to asf-site from @ f7a3a35f17184a0ecf9efbbb016c1b01f96c69f8 🚀
4190b3c is described below
commit 4190b3c1f9048b114b7a94074a0e792414cd872c
Author: wu-sheng <wu...@foxmail.com>
AuthorDate: Thu Dec 3 06:52:30 2020 +0000
Deploying to asf-site from @ f7a3a35f17184a0ecf9efbbb016c1b01f96c69f8 🚀
---
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130 files changed, 1192 insertions(+), 371 deletions(-)
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+ <h1>Observe Service Mesh with SkyWalking and Envoy Access Log Service</h1>
+ <div class="lead">In this tutorial, learn how to use Apache SkyWalking for service mesh observability without Istio Mixer</div>
+ <div class="td-byline mb-4">
+ By <b>Zhenxu Ke, Sheng Wu, and Tevah Platt. tetrate.io</b> |
+ <time datetime="2020-12-03" class="text-muted">Thursday, December 03, 2020</time>
+ </div>
+ <p><img src="canyonhorseshoe.jpg" alt=""></p>
+<ul>
+<li>Author: Zhenxu Ke, Sheng Wu, and Tevah Platt. tetrate.io</li>
+<li>Original link, <a href="https://www.tetrate.io/blog/observe-service-mesh-with-skywalking-and-envoy-access-log-service/">Tetrate.io blog</a></li>
+<li>Dec. 03th, 2020</li>
+</ul>
+<p><a href="https://github.com/apache/skywalking">Apache SkyWalking</a>: an APM (application performance monitor) system, especially designed for microservices, cloud native, and container-based (Docker, Kubernetes, Mesos) architectures.</p>
+<p><a href="https://www.envoyproxy.io/docs/envoy/latest/api-v2/service/accesslog/v2/als.proto">Envoy Access Log Service</a>: Access Log Service (ALS) is an Envoy extension that emits detailed access logs of all requests going through Envoy.</p>
+<h2 id="background">Background</h2>
+<p>Apache SkyWalking has long supported observability in service mesh with Istio Mixer adapter. But since v1.5, Istio began to deprecate Mixer due to its poor performance in large scale clusters. Mixer’s functionalities have been moved into the Envoy proxies, and is supported only through the 1.7 Istio release.
+On the other hand, <a href="https://github.com/wu-sheng">Sheng Wu</a> and <a href="https://github.com/lizan">Lizan Zhou</a> presented a better solution based on the Apache SkyWalking and Envoy ALS on <a href="https://kccncosschn19eng.sched.com/event/NroB/observability-in-service-mesh-powered-by-envoy-and-apache-skywalking-sheng-wu-lizan-zhou-tetrate">KubeCon China 2019</a>, to reduce the performance impact brought by Mixer, while retaining the same observability in service mesh. This so [...]
+If you are looking for a more efficient solution to observe your service mesh instead of using a Mixer-based solution, this is exactly what you need. In this tutorial, we will explain a little bit how the new solution works, and apply it to the bookinfo application in practice.</p>
+<h2 id="how-it-works">How it works</h2>
+<p>From a perspective of observability, Envoy can be typically deployed in 2 modes, sidecar, and router. As a sidecar, Envoy mostly represents a single service to receive and send requests (2 and 3 in the picture below). While as a proxy, Envoy may represent many services (1 in the picture below).</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.25.17-PM.png" alt="Example of Envoy deployment, as front proxy and sidecar"></p>
+<p>In both modes, the logs emitted by ALS include a node identifier. The identifier starts with <code>router~</code> (or <code>ingress~</code>) in router mode and <code>sidecar~</code> in sidecar proxy mode.</p>
+<p>Apart from the node identifier, there are <a href="https://github.com/envoyproxy/envoy/blob/549164c42cae84b59154ca4c36009e408aa10b52/generated_api_shadow/envoy/data/accesslog/v2/accesslog.proto">several noteworthy properties in the access logs</a> that will be used in this solution:</p>
+<ul>
+<li>
+<p><code>downstream_direct_remote_address</code>: This field is the downstream direct remote address on which the request from the user was received. Note: This is always the physical peer, even if the remote address is inferred from for example the <code>x-forwarded-for</code> header, proxy protocol, etc.</p>
+</li>
+<li>
+<p><code>downstream_remote_address</code>: The remote/origin address on which the request from the user was received.</p>
+</li>
+<li>
+<p><code>downstream_local_address</code>: The local/destination address on which the request from the user was received.</p>
+</li>
+<li>
+<p><code>upstream_remote_address</code>: The upstream remote/destination address that handles this exchange.</p>
+</li>
+<li>
+<p><code>upstream_local_address</code>: The upstream local/origin address that handles this exchange.</p>
+</li>
+<li>
+<p><code>upstream_cluster</code>: The upstream cluster that <em>upstream_remote_address</em> belongs to.</p>
+</li>
+</ul>
+<p>We will discuss more about the properties in the following sections.</p>
+<h3 id="sidecar">Sidecar</h3>
+<p>When serving as a sidecar, Envoy is deployed alongside a service, and delegates all the incoming/outgoing requests to/from the service.</p>
+<ol>
+<li>
+<p><strong>Delegating incoming requests:</strong> in this case, Envoy acts as a server side sidecar, and sets the <code>upstream_cluster</code> in form of <code>inbound|portNumber|portName|Hostname[or]SidecarScopeID</code>.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.37.49-PM.png" alt=""></p>
+<p>The SkyWalking analyzer checks whether either <code>downstream_remote_address</code> can be mapped to a Kubernetes service:</p>
+<p>a. If there is a service (say <code>Service B</code>) whose implementation is running in this IP(and port), then we have a service-to-service relation, <code>Service B -> Service A</code>, which can be used to build the topology. Together with the <code>start_time</code> and <code>duration</code> fields in the access log, we have the latency metrics now.</p>
+<p>b. If there is no service that can be mapped to <code>downstream_remote_address</code>, then the request may come from a service out of the mesh. Since SkyWalking cannot identify the source service where the requests come from, it simply generates the metrics without source service, according to the <a href="https://wu-sheng.github.io/STAM/">topology analysis method</a>. The topology can be built as accurately as possible, and the metrics detected from server side are still correct.</p>
+</li>
+<li>
+<p><strong>Delegating outgoing requests:</strong> in this case, Envoy acts as a client-side sidecar, and sets the <code>upstream_cluster</code> in form of <code>outbound|<port>|<subset>|<serviceFQDN></code>.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.43.16-PM.png" alt=""></p>
+<p>Client side detection is relatively simpler than (1. Delegating incoming requests). If <code>upstream_remote_address</code> is another sidecar or proxy, we simply get the mapped service name and generate the topology and metrics. Otherwise, we have no idea what it is and consider it an <code>UNKNOWN</code> service.</p>
+</li>
+</ol>
+<h3 id="proxy-role">Proxy role</h3>
+<p>When Envoy is deployed as a proxy, it is an independent service itself and doesn’t represent any other service like a sidecar does. Therefore, we can build client-side metrics as well as server-side metrics.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.46.56-PM.png" alt=""></p>
+<h2 id="example">Example</h2>
+<p>In this section, we will use the typical <a href="https://istio.io/latest/docs/examples/bookinfo/">bookinfo application</a> to demonstrate how Apache SkyWalking 8.3.0+ (the latest version up to Nov. 30th, 2020) works together with Envoy ALS to observe a service mesh.</p>
+<h3 id="installing-kubernetes">Installing Kubernetes</h3>
+<p>SkyWalking 8.3.0 supports the Envoy ALS solution under both Kubernetes environment and virtual machines (VM) environment, in this tutorial, we’ll only focus on the Kubernetes scenario, for VM solution, please stay tuned for our next blog, so we need to install Kubernetes before taking further steps.</p>
+<p>In this tutorial, we will use the <a href="https://minikube.sigs.k8s.io/docs/">Minikube</a> tool to quickly set up a local Kubernetes(v1.17) cluster for testing. In order to run all the needed components, including the bookinfo application, the SkyWalking OAP and WebUI, the cluster may need up to 4GB RAM and 2 CPU cores.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">minikube start --memory<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">4096</span> --cpus<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">2</span>
+</code></pre></div><p>Next, run <code>kubectl get pods --namespace=kube-system --watch</code> to check whether all the Kubernetes components are ready. If not, wait for the readiness before going on.</p>
+<h3 id="installing-istio">Installing Istio</h3>
+<p>Istio provides a very convenient way to configure the Envoy proxy and enable the access log service. The built-in configuration profiles free us from lots of manual operations. So, for demonstration purposes, we will use Istio through this tutorial.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">ISTIO_VERSION</span><span style="color:#ce5c00;font-weight:bold">=</span>1.7.1
+curl -L https://istio.io/downloadIstio <span style="color:#000;font-weight:bold">|</span> sh -
+sudo mv <span style="color:#000">$PWD</span>/istio-<span style="color:#000">$ISTIO_VERSION</span>/bin/istioctl /usr/local/bin/
+istioctl install --set <span style="color:#000">profile</span><span style="color:#ce5c00;font-weight:bold">=</span>demo
+kubectl label namespace default istio-injection<span style="color:#ce5c00;font-weight:bold">=</span>enabled
+</code></pre></div><p>Run <code>kubectl get pods --namespace=istio-system --watch</code> to check whether all the Istio components are ready. If not, wait for the readiness before going on.</p>
+<h3 id="enabling-als">Enabling ALS</h3>
+<p>The <code>demo</code> profile doesn’t enable ALS by default. We need to reconfigure it to enable ALS via some configuration.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">istioctl manifest install <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.enableEnvoyAccessLogService<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.defaultConfig.envoyAccessLogService.address<span style="color:#ce5c00;font-weight:bold">=</span>skywalking-oap.istio-system:11800
+</code></pre></div><p>The example command <code>--set meshConfig.enableEnvoyAccessLogService=true</code> enables the Envoy access log service in the mesh. And as we said earlier, ALS is essentially a gRPC service that emits requests logs. The config <code>meshConfig.defaultConfig.envoyAccessLogService.address=skywalking-oap.istio-system:11800</code> tells this gRPC service where to emit the logs, say <code>skywalking-oap.istio-system:11800</code>, where we will deploy the SkyWalking ALS [...]
+<p>NOTE:
+You can also enable the ALS when installing Istio so that you don’t need to restart Istio after installation:</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">istioctl install --set <span style="color:#000">profile</span><span style="color:#ce5c00;font-weight:bold">=</span>demo <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.enableEnvoyAccessLogService<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.defaultConfig.envoyAccessLogService.address<span style="color:#ce5c00;font-weight:bold">=</span>skywalking-oap.istio-system:11800
+kubectl label namespace default istio-injection<span style="color:#ce5c00;font-weight:bold">=</span>enabled
+</code></pre></div><h3 id="deploying-apache-skywalking">Deploying Apache SkyWalking</h3>
+<p>The SkyWalking community provides a <a href="https://helm.sh">Helm</a> Chart to make it easier to deploy SkyWalking and its dependent services in Kubernetes. The Helm Chart can be found at the <a href="https://github.com/apache/skywalking-kubernetes">GitHub repository</a>.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#8f5902;font-style:italic"># Install Helm</span>
+curl -sSLO https://get.helm.sh/helm-v3.0.0-linux-amd64.tar.gz
+sudo tar xz -C /usr/local/bin --strip-components<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">1</span> linux-amd64/helm -f helm-v3.0.0-linux-amd64.tar.gz
+<span style="color:#8f5902;font-style:italic"># Clone SkyWalking Helm Chart</span>
+git clone https://github.com/apache/skywalking-kubernetes
+<span style="color:#204a87">cd</span> skywalking-kubernetes/chart
+git reset --hard dd749f25913830c47a97430618cefc4167612e75
+<span style="color:#8f5902;font-style:italic"># Update dependencies</span>
+helm dep up skywalking
+<span style="color:#8f5902;font-style:italic"># Deploy SkyWalking</span>
+helm -n istio-system install skywalking skywalking <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.storageType<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#4e9a06">'h2'</span><span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set ui.image.tag<span style="color:#ce5c00;font-weight:bold">=</span>8.3.0 <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.image.tag<span style="color:#ce5c00;font-weight:bold">=</span>8.3.0-es7 <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.replicas<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">1</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.env.SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS<span style="color:#ce5c00;font-weight:bold">=</span>k8s-mesh <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.env.JAVA_OPTS<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#4e9a06">'-Dmode='</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.envoy.als.enabled<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set elasticsearch.enabled<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">false</span>
+</code></pre></div><p>We deploy SkyWalking to the namespace <code>istio-system</code>, so that SkyWalking OAP service can be accessed by <code>skywalking-oap.istio-system:11800</code>, to which we told ALS to emit their logs, in the previous step.</p>
+<p>We also enable the ALS analyzer in the SkyWalking OAP: <code>oap.env.SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS=k8s-mesh</code>. The analyzer parses the access logs and maps the IP addresses in the logs to the real service names in the Kubernetes, to build a topology.</p>
+<p>In order to retrieve the metadata (such as Pod IP and service names) from a Kubernetes cluster for IP mappings, we also set <code>oap.envoy.als.enabled=true</code>, to apply for a <code>ClusterRole</code> that has access to the metadata.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">POD_NAME</span><span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87;font-weight:bold">$(</span>kubectl get pods -A -l <span style="color:#4e9a06">"app=skywalking,release=skywalking,component=ui"</span> -o name<span style="color:#204a87;font- [...]
+<span style="color:#204a87">echo</span> <span style="color:#000">$POD_NAME</span>
+kubectl -n istio-system port-forward <span style="color:#000">$POD_NAME</span> 8080:8080
+</code></pre></div><p>Now navigate your browser to http://localhost:8080 . You should be able to see the SkyWalking dashboard. The dashboard is empty for now, but after we deploy the demo application and generate traffic, it should be filled up later.</p>
+<p><img src="Screen-Shot-2020-12-02-at-3.01.03-PM.png" alt=""></p>
+<h3 id="deploying-bookinfo-application">Deploying Bookinfo application</h3>
+<p>Run:</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">ISTIO_VERSION</span><span style="color:#ce5c00;font-weight:bold">=</span>1.7.1
+kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#000">$ISTIO_VERSION</span>/samples/bookinfo/platform/kube/bookinfo.yaml
+kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#000">$ISTIO_VERSION</span>/samples/bookinfo/networking/bookinfo-gateway.yaml
+kubectl <span style="color:#204a87">wait</span> --for<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#000">condition</span><span style="color:#ce5c00;font-weight:bold">=</span>Ready pods --all --timeout<span style="color:#ce5c00;font-weight:bold">=</span>1200s
+minikube tunnel
+</code></pre></div><p>Then navigate your browser to http://localhost/productpage. You should be able to see the typical bookinfo application. Refresh the webpage several times to generate enough access logs.</p>
+<h3 id="done">Done!</h3>
+<p>And you’re all done! Check out the SkyWalking WebUI again. You should see the topology of the bookinfo application, as well the metrics of each individual service of the bookinfo application.</p>
+<p><img src="Screen-Shot-2020-12-02-at-3.05.24-PM.png" alt="">
+<img src="Screen-Shot-2020-12-02-at-3.11.55-PM.png" alt=""></p>
+<h3 id="troubleshooting">Troubleshooting</h3>
+<ul>
+<li>Check all pods status: <code>kubectl get pods -A</code>.</li>
+<li>SkyWalking OAP logs: <code>kubectl -n istio-system logs -f $(kubectl get pod -A -l "app=skywalking,release=skywalking,component=oap" -o name)</code>.</li>
+<li>SkyWalking WebUI logs: <code>kubectl -n istio-system logs -f $(kubectl get pod -A -l "app=skywalking,release=skywalking,component=ui" -o name)</code>.</li>
+<li>Make sure the time zone at the bottom-right of the WebUI is set to <code>UTC +0</code>.</li>
+</ul>
+<h2 id="customizing-service-names">Customizing Service Names</h2>
+<p>The SkyWalking community brought more improvements to the ALS solution in the 8.3.0 version. You can decide how to compose the service names when mapping from the IP addresses, with variables <code>service</code> and <code>pod</code>. For instance, configuring <code>K8S_SERVICE_NAME_RULE</code> to the expression <code>${service.metadata.name}-${pod.metadata.labels.version}</code> gets service names with version label such as <code>reviews-v1</code>, <code>reviews-v2</code>, and <code> [...]
+<h2 id="working-als-with-vm">Working ALS with VM</h2>
+<p>Kubernetes is popular, but what about VMs? From what we discussed above, in order to map the IPs to services, SkyWalking needs access to the Kubernetes cluster, fetching service metadata and Pod IPs. But in a VM environment, there is no source from which we can fetch those metadata.
+In the next post, we will introduce another ALS analyzer based on the Envoy metadata exchange mechanism. With this analyzer, you are able to observe a service mesh in the VM environment. Stay tuned!
+If you want to have commercial support for the ALS solution or hybrid mesh observability, <a href="https://www.tetrate.io/tetrate-service-bridge/">Tetrate Service Bridge, TSB</a> is another good option out there.</p>
+<h2 id="additional-resources">Additional Resources</h2>
+<ul>
+<li>KubeCon 2019 Recorded <a href="https://www.youtube.com/watch?v=tERm39ju9ew">Video</a>.</li>
+<li>Get more SkyWalking updates on <a href="https://skywalking.apache.org">the official website</a>.</li>
+<li>Read more about SkyWalking from Tetrate on our <a href="https://www.tetrate.io/blog/category/open-source/apache-skywalking/">blog</a>.</li>
+</ul>
+<p><em>Apache SkyWalking founder Sheng Wu, SkyWalking core maintainer Zhenxu Ke are Tetrate engineers, and Tevah Platt is a content writer for Tetrate. Tetrate helps organizations adopt open source service mesh tools, including Istio, Envoy, and Apache SkyWalking, so they can manage microservices, run service mesh on any infrastructure, and modernize their applications.</em></p>
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diff --git a/blog/index.html b/blog/index.html
index d4daf19..111126c 100644
--- a/blog/index.html
+++ b/blog/index.html
@@ -169,6 +169,22 @@ if (!doNotTrack) {
<li class="media mb-4">
<div class="media-body">
+ <h5 class="mt-0 mb-1"><a href="/blog/2020-12-03-obs-service-mesh-with-sw-and-als/">Observe Service Mesh with SkyWalking and Envoy Access Log Service</a></h5>
+ <p class="mb-2 mb-md-3"><small class="text-muted">Thursday, December 03, 2020 in Blog</small></p>
+
+
+
+
+
+
+
+ <p class="pt-0 mt-0">In this tutorial, learn how to use Apache SkyWalking for service mesh observability without Istio Mixer</p>
+ <p class="pt-0"><a href="/blog/2020-12-03-obs-service-mesh-with-sw-and-als/">Read more</a></p>
+ </div>
+ </li>
+
+ <li class="media mb-4">
+ <div class="media-body">
<h5 class="mt-0 mb-1"><a href="/blog/2020-11-25-skywalking-satellite-0.1.0-design/">The first design of Satellite 0.1.0</a></h5>
<p class="mb-2 mb-md-3"><small class="text-muted">Wednesday, November 25, 2020 in Blog</small></p>
@@ -311,22 +327,6 @@ if (!doNotTrack) {
</div>
</li>
- <li class="media mb-4">
- <div class="media-body">
- <h5 class="mt-0 mb-1"><a href="/blog/2020-07-26-apdex-and-skywalking/">The Apdex Score for Measuring Service Mesh Health</a></h5>
- <p class="mb-2 mb-md-3"><small class="text-muted">Sunday, July 26, 2020 in Blog</small></p>
-
-
-
-
-
-
-
- <p class="pt-0 mt-0"> In managing Service Mesh Health, Asking `How are you' is more profound than `What are your symptoms'. Apdex goes a long way in helping this.</p>
- <p class="pt-0"><a href="/blog/2020-07-26-apdex-and-skywalking/">Read more</a></p>
- </div>
- </li>
-
</ul>
</div>
diff --git a/blog/index.xml b/blog/index.xml
index e2cbb22..0d85c67 100644
--- a/blog/index.xml
+++ b/blog/index.xml
@@ -14,6 +14,164 @@
<item>
+ <title>Blog: Observe Service Mesh with SkyWalking and Envoy Access Log Service</title>
+ <link>https://skywalking.apache.org/blog/2020-12-03-obs-service-mesh-with-sw-and-als/</link>
+ <pubDate>Thu, 03 Dec 2020 00:00:00 +0000</pubDate>
+
+ <guid>https://skywalking.apache.org/blog/2020-12-03-obs-service-mesh-with-sw-and-als/</guid>
+ <description>
+
+
+ <p><img src="canyonhorseshoe.jpg" alt=""></p>
+<ul>
+<li>Author: Zhenxu Ke, Sheng Wu, and Tevah Platt. tetrate.io</li>
+<li>Original link, <a href="https://www.tetrate.io/blog/observe-service-mesh-with-skywalking-and-envoy-access-log-service/">Tetrate.io blog</a></li>
+<li>Dec. 03th, 2020</li>
+</ul>
+<p><a href="https://github.com/apache/skywalking">Apache SkyWalking</a>: an APM (application performance monitor) system, especially designed for microservices, cloud native, and container-based (Docker, Kubernetes, Mesos) architectures.</p>
+<p><a href="https://www.envoyproxy.io/docs/envoy/latest/api-v2/service/accesslog/v2/als.proto">Envoy Access Log Service</a>: Access Log Service (ALS) is an Envoy extension that emits detailed access logs of all requests going through Envoy.</p>
+<h2 id="background">Background</h2>
+<p>Apache SkyWalking has long supported observability in service mesh with Istio Mixer adapter. But since v1.5, Istio began to deprecate Mixer due to its poor performance in large scale clusters. Mixer’s functionalities have been moved into the Envoy proxies, and is supported only through the 1.7 Istio release.
+On the other hand, <a href="https://github.com/wu-sheng">Sheng Wu</a> and <a href="https://github.com/lizan">Lizan Zhou</a> presented a better solution based on the Apache SkyWalking and Envoy ALS on <a href="https://kccncosschn19eng.sched.com/event/NroB/observability-in-service-mesh-powered-by-envoy-and-apache-skywalking-sheng-wu-lizan-zhou-tetrate">KubeCon China 2019</a>, to reduce the performance impact brought by Mixer, whi [...]
+If you are looking for a more efficient solution to observe your service mesh instead of using a Mixer-based solution, this is exactly what you need. In this tutorial, we will explain a little bit how the new solution works, and apply it to the bookinfo application in practice.</p>
+<h2 id="how-it-works">How it works</h2>
+<p>From a perspective of observability, Envoy can be typically deployed in 2 modes, sidecar, and router. As a sidecar, Envoy mostly represents a single service to receive and send requests (2 and 3 in the picture below). While as a proxy, Envoy may represent many services (1 in the picture below).</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.25.17-PM.png" alt="Example of Envoy deployment, as front proxy and sidecar"></p>
+<p>In both modes, the logs emitted by ALS include a node identifier. The identifier starts with <code>router~</code> (or <code>ingress~</code>) in router mode and <code>sidecar~</code> in sidecar proxy mode.</p>
+<p>Apart from the node identifier, there are <a href="https://github.com/envoyproxy/envoy/blob/549164c42cae84b59154ca4c36009e408aa10b52/generated_api_shadow/envoy/data/accesslog/v2/accesslog.proto">several noteworthy properties in the access logs</a> that will be used in this solution:</p>
+<ul>
+<li>
+<p><code>downstream_direct_remote_address</code>: This field is the downstream direct remote address on which the request from the user was received. Note: This is always the physical peer, even if the remote address is inferred from for example the <code>x-forwarded-for</code> header, proxy protocol, etc.</p>
+</li>
+<li>
+<p><code>downstream_remote_address</code>: The remote/origin address on which the request from the user was received.</p>
+</li>
+<li>
+<p><code>downstream_local_address</code>: The local/destination address on which the request from the user was received.</p>
+</li>
+<li>
+<p><code>upstream_remote_address</code>: The upstream remote/destination address that handles this exchange.</p>
+</li>
+<li>
+<p><code>upstream_local_address</code>: The upstream local/origin address that handles this exchange.</p>
+</li>
+<li>
+<p><code>upstream_cluster</code>: The upstream cluster that <em>upstream_remote_address</em> belongs to.</p>
+</li>
+</ul>
+<p>We will discuss more about the properties in the following sections.</p>
+<h3 id="sidecar">Sidecar</h3>
+<p>When serving as a sidecar, Envoy is deployed alongside a service, and delegates all the incoming/outgoing requests to/from the service.</p>
+<ol>
+<li>
+<p><strong>Delegating incoming requests:</strong> in this case, Envoy acts as a server side sidecar, and sets the <code>upstream_cluster</code> in form of <code>inbound|portNumber|portName|Hostname[or]SidecarScopeID</code>.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.37.49-PM.png" alt=""></p>
+<p>The SkyWalking analyzer checks whether either <code>downstream_remote_address</code> can be mapped to a Kubernetes service:</p>
+<p>a. If there is a service (say <code>Service B</code>) whose implementation is running in this IP(and port), then we have a service-to-service relation, <code>Service B -&gt; Service A</code>, which can be used to build the topology. Together with the <code>start_time</code> and <code>duration</code> fields in the access log, we have the latency metrics now.</p>
+<p>b. If there is no service that can be mapped to <code>downstream_remote_address</code>, then the request may come from a service out of the mesh. Since SkyWalking cannot identify the source service where the requests come from, it simply generates the metrics without source service, according to the <a href="https://wu-sheng.github.io/STAM/">topology analysis method</a>. The topology can be built as accurately as possible, and the metrics detected [...]
+</li>
+<li>
+<p><strong>Delegating outgoing requests:</strong> in this case, Envoy acts as a client-side sidecar, and sets the <code>upstream_cluster</code> in form of <code>outbound|&lt;port&gt;|&lt;subset&gt;|&lt;serviceFQDN&gt;</code>.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.43.16-PM.png" alt=""></p>
+<p>Client side detection is relatively simpler than (1. Delegating incoming requests). If <code>upstream_remote_address</code> is another sidecar or proxy, we simply get the mapped service name and generate the topology and metrics. Otherwise, we have no idea what it is and consider it an <code>UNKNOWN</code> service.</p>
+</li>
+</ol>
+<h3 id="proxy-role">Proxy role</h3>
+<p>When Envoy is deployed as a proxy, it is an independent service itself and doesn&rsquo;t represent any other service like a sidecar does. Therefore, we can build client-side metrics as well as server-side metrics.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.46.56-PM.png" alt=""></p>
+<h2 id="example">Example</h2>
+<p>In this section, we will use the typical <a href="https://istio.io/latest/docs/examples/bookinfo/">bookinfo application</a> to demonstrate how Apache SkyWalking 8.3.0+ (the latest version up to Nov. 30th, 2020) works together with Envoy ALS to observe a service mesh.</p>
+<h3 id="installing-kubernetes">Installing Kubernetes</h3>
+<p>SkyWalking 8.3.0 supports the Envoy ALS solution under both Kubernetes environment and virtual machines (VM) environment, in this tutorial, we’ll only focus on the Kubernetes scenario, for VM solution, please stay tuned for our next blog, so we need to install Kubernetes before taking further steps.</p>
+<p>In this tutorial, we will use the <a href="https://minikube.sigs.k8s.io/docs/">Minikube</a> tool to quickly set up a local Kubernetes(v1.17) cluster for testing. In order to run all the needed components, including the bookinfo application, the SkyWalking OAP and WebUI, the cluster may need up to 4GB RAM and 2 CPU cores.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">minikube start --memory<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">4096</span> --cpus<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-we [...]
+</code></pre></div><p>Next, run <code>kubectl get pods --namespace=kube-system --watch</code> to check whether all the Kubernetes components are ready. If not, wait for the readiness before going on.</p>
+<h3 id="installing-istio">Installing Istio</h3>
+<p>Istio provides a very convenient way to configure the Envoy proxy and enable the access log service. The built-in configuration profiles free us from lots of manual operations. So, for demonstration purposes, we will use Istio through this tutorial.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">ISTIO_VERSION</span><span style="color:#ce5c00;font-weight:bold">=</span>1.7.1
+curl -L https://istio.io/downloadIstio <span style="color:#000;font-weight:bold">|</span> sh -
+sudo mv <span style="color:#000">$PWD</span>/istio-<span style="color:#000">$ISTIO_VERSION</span>/bin/istioctl /usr/local/bin/
+istioctl install --set <span style="color:#000">profile</span><span style="color:#ce5c00;font-weight:bold">=</span>demo
+kubectl label namespace default istio-injection<span style="color:#ce5c00;font-weight:bold">=</span>enabled
+</code></pre></div><p>Run <code>kubectl get pods --namespace=istio-system --watch</code> to check whether all the Istio components are ready. If not, wait for the readiness before going on.</p>
+<h3 id="enabling-als">Enabling ALS</h3>
+<p>The <code>demo</code> profile doesn’t enable ALS by default. We need to reconfigure it to enable ALS via some configuration.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">istioctl manifest install <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.enableEnvoyAccessLogService<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.defaultConfig.envoyAccessLogService.address<span style="color:#ce5c00;font-weight:bold">=</span>skywalking-oap.istio-system:11800
+</code></pre></div><p>The example command <code>--set meshConfig.enableEnvoyAccessLogService=true</code> enables the Envoy access log service in the mesh. And as we said earlier, ALS is essentially a gRPC service that emits requests logs. The config <code>meshConfig.defaultConfig.envoyAccessLogService.address=skywalking-oap.istio-system:11800</code> tells this gRPC service where to emit the logs, say <code>skywalking-oap.istio-system [...]
+<p>NOTE:
+You can also enable the ALS when installing Istio so that you don’t need to restart Istio after installation:</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">istioctl install --set <span style="color:#000">profile</span><span style="color:#ce5c00;font-weight:bold">=</span>demo <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.enableEnvoyAccessLogService<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.defaultConfig.envoyAccessLogService.address<span style="color:#ce5c00;font-weight:bold">=</span>skywalking-oap.istio-system:11800
+kubectl label namespace default istio-injection<span style="color:#ce5c00;font-weight:bold">=</span>enabled
+</code></pre></div><h3 id="deploying-apache-skywalking">Deploying Apache SkyWalking</h3>
+<p>The SkyWalking community provides a <a href="https://helm.sh">Helm</a> Chart to make it easier to deploy SkyWalking and its dependent services in Kubernetes. The Helm Chart can be found at the <a href="https://github.com/apache/skywalking-kubernetes">GitHub repository</a>.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#8f5902;font-style:italic"># Install Helm</span>
+curl -sSLO https://get.helm.sh/helm-v3.0.0-linux-amd64.tar.gz
+sudo tar xz -C /usr/local/bin --strip-components<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">1</span> linux-amd64/helm -f helm-v3.0.0-linux-amd64.tar.gz
+<span style="color:#8f5902;font-style:italic"># Clone SkyWalking Helm Chart</span>
+git clone https://github.com/apache/skywalking-kubernetes
+<span style="color:#204a87">cd</span> skywalking-kubernetes/chart
+git reset --hard dd749f25913830c47a97430618cefc4167612e75
+<span style="color:#8f5902;font-style:italic"># Update dependencies</span>
+helm dep up skywalking
+<span style="color:#8f5902;font-style:italic"># Deploy SkyWalking</span>
+helm -n istio-system install skywalking skywalking <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.storageType<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#4e9a06">&#39;h2&#39;</span><span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set ui.image.tag<span style="color:#ce5c00;font-weight:bold">=</span>8.3.0 <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.image.tag<span style="color:#ce5c00;font-weight:bold">=</span>8.3.0-es7 <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.replicas<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">1</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.env.SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS<span style="color:#ce5c00;font-weight:bold">=</span>k8s-mesh <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.env.JAVA_OPTS<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#4e9a06">&#39;-Dmode=&#39;</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.envoy.als.enabled<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set elasticsearch.enabled<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">false</span>
+</code></pre></div><p>We deploy SkyWalking to the namespace <code>istio-system</code>, so that SkyWalking OAP service can be accessed by <code>skywalking-oap.istio-system:11800</code>, to which we told ALS to emit their logs, in the previous step.</p>
+<p>We also enable the ALS analyzer in the SkyWalking OAP: <code>oap.env.SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS=k8s-mesh</code>. The analyzer parses the access logs and maps the IP addresses in the logs to the real service names in the Kubernetes, to build a topology.</p>
+<p>In order to retrieve the metadata (such as Pod IP and service names) from a Kubernetes cluster for IP mappings, we also set <code>oap.envoy.als.enabled=true</code>, to apply for a <code>ClusterRole</code> that has access to the metadata.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">POD_NAME</span><span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87;font-weight:bold">$(</span>kubectl get pods -A -l & [...]
+<span style="color:#204a87">echo</span> <span style="color:#000">$POD_NAME</span>
+kubectl -n istio-system port-forward <span style="color:#000">$POD_NAME</span> 8080:8080
+</code></pre></div><p>Now navigate your browser to http://localhost:8080 . You should be able to see the SkyWalking dashboard. The dashboard is empty for now, but after we deploy the demo application and generate traffic, it should be filled up later.</p>
+<p><img src="Screen-Shot-2020-12-02-at-3.01.03-PM.png" alt=""></p>
+<h3 id="deploying-bookinfo-application">Deploying Bookinfo application</h3>
+<p>Run:</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">ISTIO_VERSION</span><span style="color:#ce5c00;font-weight:bold">=</span>1.7.1
+kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#000">$ISTIO_VERSION</span>/samples/bookinfo/platform/kube/bookinfo.yaml
+kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#000">$ISTIO_VERSION</span>/samples/bookinfo/networking/bookinfo-gateway.yaml
+kubectl <span style="color:#204a87">wait</span> --for<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#000">condition</span><span style="color:#ce5c00;font-weight:bold">=</span>Ready pods --all --timeout<span style="color:#ce5c00;font-weight:bold">=</span>1200s
+minikube tunnel
+</code></pre></div><p>Then navigate your browser to http://localhost/productpage. You should be able to see the typical bookinfo application. Refresh the webpage several times to generate enough access logs.</p>
+<h3 id="done">Done!</h3>
+<p>And you’re all done! Check out the SkyWalking WebUI again. You should see the topology of the bookinfo application, as well the metrics of each individual service of the bookinfo application.</p>
+<p><img src="Screen-Shot-2020-12-02-at-3.05.24-PM.png" alt="">
+<img src="Screen-Shot-2020-12-02-at-3.11.55-PM.png" alt=""></p>
+<h3 id="troubleshooting">Troubleshooting</h3>
+<ul>
+<li>Check all pods status: <code>kubectl get pods -A</code>.</li>
+<li>SkyWalking OAP logs: <code>kubectl -n istio-system logs -f $(kubectl get pod -A -l &quot;app=skywalking,release=skywalking,component=oap&quot; -o name)</code>.</li>
+<li>SkyWalking WebUI logs: <code>kubectl -n istio-system logs -f $(kubectl get pod -A -l &quot;app=skywalking,release=skywalking,component=ui&quot; -o name)</code>.</li>
+<li>Make sure the time zone at the bottom-right of the WebUI is set to <code>UTC +0</code>.</li>
+</ul>
+<h2 id="customizing-service-names">Customizing Service Names</h2>
+<p>The SkyWalking community brought more improvements to the ALS solution in the 8.3.0 version. You can decide how to compose the service names when mapping from the IP addresses, with variables <code>service</code> and <code>pod</code>. For instance, configuring <code>K8S_SERVICE_NAME_RULE</code> to the expression <code>${service.metadata.name}-${pod.metadata.labels.version}</code> gets service names with version label such as <co [...]
+<h2 id="working-als-with-vm">Working ALS with VM</h2>
+<p>Kubernetes is popular, but what about VMs? From what we discussed above, in order to map the IPs to services, SkyWalking needs access to the Kubernetes cluster, fetching service metadata and Pod IPs. But in a VM environment, there is no source from which we can fetch those metadata.
+In the next post, we will introduce another ALS analyzer based on the Envoy metadata exchange mechanism. With this analyzer, you are able to observe a service mesh in the VM environment. Stay tuned!
+If you want to have commercial support for the ALS solution or hybrid mesh observability, <a href="https://www.tetrate.io/tetrate-service-bridge/">Tetrate Service Bridge, TSB</a> is another good option out there.</p>
+<h2 id="additional-resources">Additional Resources</h2>
+<ul>
+<li>KubeCon 2019 Recorded <a href="https://www.youtube.com/watch?v=tERm39ju9ew">Video</a>.</li>
+<li>Get more SkyWalking updates on <a href="https://skywalking.apache.org">the official website</a>.</li>
+<li>Read more about SkyWalking from Tetrate on our <a href="https://www.tetrate.io/blog/category/open-source/apache-skywalking/">blog</a>.</li>
+</ul>
+<p><em>Apache SkyWalking founder Sheng Wu, SkyWalking core maintainer Zhenxu Ke are Tetrate engineers, and Tevah Platt is a content writer for Tetrate. Tetrate helps organizations adopt open source service mesh tools, including Istio, Envoy, and Apache SkyWalking, so they can manage microservices, run service mesh on any infrastructure, and modernize their applications.</em></p>
+
+ </description>
+ </item>
+
+ <item>
<title>Blog: The first design of Satellite 0.1.0</title>
<link>https://skywalking.apache.org/blog/2020-11-25-skywalking-satellite-0.1.0-design/</link>
<pubDate>Wed, 25 Nov 2020 00:00:00 +0000</pubDate>
diff --git a/blog/page/2/index.html b/blog/page/2/index.html
index 9661b6b..d8898cc 100644
--- a/blog/page/2/index.html
+++ b/blog/page/2/index.html
@@ -168,6 +168,22 @@ if (!doNotTrack) {
<li class="media mb-4">
<div class="media-body">
+ <h5 class="mt-0 mb-1"><a href="/blog/2020-07-26-apdex-and-skywalking/">The Apdex Score for Measuring Service Mesh Health</a></h5>
+ <p class="mb-2 mb-md-3"><small class="text-muted">Sunday, July 26, 2020 in Blog</small></p>
+
+
+
+
+
+
+
+ <p class="pt-0 mt-0"> In managing Service Mesh Health, Asking `How are you' is more profound than `What are your symptoms'. Apdex goes a long way in helping this.</p>
+ <p class="pt-0"><a href="/blog/2020-07-26-apdex-and-skywalking/">Read more</a></p>
+ </div>
+ </li>
+
+ <li class="media mb-4">
+ <div class="media-body">
<h5 class="mt-0 mb-1"><a href="/blog/2020-04-13-apache-skywalking-profiling/">Apache SkyWalking: Use Profiling to Fix the Blind Spot of Distributed Tracing</a></h5>
<p class="mb-2 mb-md-3"><small class="text-muted">Monday, April 13, 2020 in Blog</small></p>
diff --git a/events/relase-apache-skywalking-nginx-lua-0-2-0/index.html b/events/relase-apache-skywalking-nginx-lua-0-2-0/index.html
index 79948b3..eead96c 100644
--- a/events/relase-apache-skywalking-nginx-lua-0-2-0/index.html
+++ b/events/relase-apache-skywalking-nginx-lua-0-2-0/index.html
@@ -22,12 +22,12 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/relase-apache-skywalking-nginx-lua-0-2-0/" />
<meta property="article:published_time" content="2020-06-21T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Relase Apache SkyWalking Nginx LUA 0.2.0">
<meta itemprop="description" content="SkyWalking Nginx LUA 0.2.0 is release. Go to downloads page to find release tars.
Adapt the new v3 protocol. Implement correlation protocol. Support batch segment report. ">
<meta itemprop="datePublished" content="2020-06-21T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="26">
diff --git a/events/release-apache-skwaylking-apm-8-3-0/index.html b/events/release-apache-skwaylking-apm-8-3-0/index.html
index f7b33e3..b549695 100644
--- a/events/release-apache-skwaylking-apm-8-3-0/index.html
+++ b/events/release-apache-skwaylking-apm-8-3-0/index.html
@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/release-apache-skwaylking-apm-8-3-0/" />
<meta property="article:published_time" content="2020-12-02T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Release Apache SkyWalking APM 8.3.0">
<meta itemprop="description" content="Release Apache SkyWalking 8.3.0.">
<meta itemprop="datePublished" content="2020-12-02T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
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index b9c3949..a4ed53b 100644
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<meta property="article:published_time" content="2019-12-26T00:00:00+00:00" />
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index ce6508b..2d5da53 100644
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<meta itemprop="description" content="SkyWalking Chart 1.1.0 is released. Go to downloads page to find release tars.
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index eef841b..b4cf1cc 100644
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<meta property="article:published_time" content="2020-03-31T00:00:00+00:00" />
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index 4820490..b4fb10b 100644
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index 2947739..0dffcc1 100644
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<meta property="article:published_time" content="2020-08-12T00:00:00+00:00" />
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index cc19a95..9d22dfc 100644
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<meta property="article:published_time" content="2020-03-20T00:00:00+00:00" />
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<meta itemprop="name" content="Release Apache SkyWalking CLI 0.2.0">
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<meta property="article:published_time" content="2020-07-27T00:00:00+00:00" />
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<meta itemprop="name" content="Release Apache SkyWalking CLI 0.3.0">
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index cd56052..499e7ad 100644
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index 43ac144..d60a7ae 100644
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index e6cfd82..2ef37a8 100644
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<meta property="article:published_time" content="2020-10-30T00:00:00+00:00" />
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index 5529f3e..1ef7de8 100644
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<meta property="article:published_time" content="2020-11-03T00:00:00+00:00" />
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index 126d343..7990faa 100644
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<meta property="article:published_time" content="2020-06-28T00:00:00+00:00" />
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<meta itemprop="description" content="SkyWalking Python 0.1.0 is released. Go to downloads page to find release tars.
API: agent core APIs, check the APIs and the examples Plugin: built-in libraries http, urllib.request and third-party library requests are supported. Test: agent test framework is setup, and the corresponding tests of aforementioned plugins are also added. ">
<meta itemprop="datePublished" content="2020-06-28T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="50">
diff --git a/events/release-apache-skywalking-python-0-2-0/index.html b/events/release-apache-skywalking-python-0-2-0/index.html
index eef5e40..5b98e98 100644
--- a/events/release-apache-skywalking-python-0-2-0/index.html
+++ b/events/release-apache-skywalking-python-0-2-0/index.html
@@ -24,14 +24,14 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/release-apache-skywalking-python-0-2-0/" />
<meta property="article:published_time" content="2020-07-28T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Release Apache SkyWalking Python 0.2.0">
<meta itemprop="description" content="SkyWalking Python 0.2.0 is released. Go to downloads page to find release tars.
Plugins:
Kafka Plugin (#50) Tornado Plugin (#48) Redis Plugin (#44) Django Plugin (#37) PyMsql Plugin (#35) Flask plugin (#31) API
Add ignore_suffix Config (#40) Add missing log method and simplify test codes (#34) Add content equality of SegmentRef (#30) Validate carrier before using it (#29) Chores and tests">
<meta itemprop="datePublished" content="2020-07-28T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="82">
diff --git a/events/release-apache-skywalking-python-0-3-0/index.html b/events/release-apache-skywalking-python-0-3-0/index.html
index b4737ed..d4c904b 100644
--- a/events/release-apache-skywalking-python-0-3-0/index.html
+++ b/events/release-apache-skywalking-python-0-3-0/index.html
@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/release-apache-skywalking-python-0-3-0/" />
<meta property="article:published_time" content="2020-08-28T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Release Apache SkyWalking Python 0.3.0">
<meta itemprop="description" content="Release Apache SkyWalking Python 0.3.0.">
<meta itemprop="datePublished" content="2020-08-28T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="112">
diff --git a/events/release-apache-skywalking-python-0-4-0/index.html b/events/release-apache-skywalking-python-0-4-0/index.html
index e8c07e3..b95a8e6 100644
--- a/events/release-apache-skywalking-python-0-4-0/index.html
+++ b/events/release-apache-skywalking-python-0-4-0/index.html
@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/release-apache-skywalking-python-0-4-0/" />
<meta property="article:published_time" content="2020-11-24T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Release Apache SkyWalking Python 0.4.0">
<meta itemprop="description" content="Release Apache SkyWalking Python 0.4.0.">
<meta itemprop="datePublished" content="2020-11-24T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="45">
diff --git a/events/rocketbot-ui-has-been-accepted-as-skywalking-primary-ui/index.html b/events/rocketbot-ui-has-been-accepted-as-skywalking-primary-ui/index.html
index 1980cc9..50ca976 100644
--- a/events/rocketbot-ui-has-been-accepted-as-skywalking-primary-ui/index.html
+++ b/events/rocketbot-ui-has-been-accepted-as-skywalking-primary-ui/index.html
@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/rocketbot-ui-has-been-accepted-as-skywalking-primary-ui/" />
<meta property="article:published_time" content="2019-04-23T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="RocketBot UI has been accepted as SkyWalking primary UI">
<meta itemprop="description" content="Apache SkyWalking PMC accept the RocketBot UI contributions. After IP clearance, it will be released in SkyWalking 6.1 soon.">
<meta itemprop="datePublished" content="2019-04-23T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="19">
diff --git a/events/skywalking-graduated-as-apache-top-level-project/index.html b/events/skywalking-graduated-as-apache-top-level-project/index.html
index 624e507..019e061 100644
--- a/events/skywalking-graduated-as-apache-top-level-project/index.html
+++ b/events/skywalking-graduated-as-apache-top-level-project/index.html
@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/skywalking-graduated-as-apache-top-level-project/" />
<meta property="article:published_time" content="2019-04-17T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="SkyWalking graduated as Apache Top Level Project">
<meta itemprop="description" content="Apache board approved SkyWalking graduated as TLP at April 17th 2019.">
<meta itemprop="datePublished" content="2019-04-17T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="11">
diff --git a/events/skywalking-nginx-lua-0-1-0-release/index.html b/events/skywalking-nginx-lua-0-1-0-release/index.html
index 1aeece3..8c051d5 100644
--- a/events/skywalking-nginx-lua-0-1-0-release/index.html
+++ b/events/skywalking-nginx-lua-0-1-0-release/index.html
@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/skywalking-nginx-lua-0-1-0-release/" />
<meta property="article:published_time" content="2020-03-10T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="SkyWalking Nginx LUA 0.1.0 release">
<meta itemprop="description" content="Support tracing and collect metrics from Nginx server. Require SkyWalking APM 7.0+.">
<meta itemprop="datePublished" content="2020-03-10T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="12">
diff --git a/events/transfer-docker-images-to-apache-official-repository/index.html b/events/transfer-docker-images-to-apache-official-repository/index.html
index fa019a4..b8818cc 100644
--- a/events/transfer-docker-images-to-apache-official-repository/index.html
+++ b/events/transfer-docker-images-to-apache-official-repository/index.html
@@ -22,12 +22,12 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/transfer-docker-images-to-apache-official-repository/" />
<meta property="article:published_time" content="2019-02-17T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Transfer Docker Images to Apache Official Repository">
<meta itemprop="description" content="According to Apache Software Foundation branding policy all docker images of Apache Skywalking should be transferred from skywalking to apache with a prefix skywalking-. The transfer details are as follows
skywalking/base -> apache/skywalking-base skywalking/oap -> apache/skywalking-oap-server skywalking/ui -> apache/skywalking-ui All of repositories in skywalking will be removed after one week.">
<meta itemprop="datePublished" content="2019-02-17T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="50">
diff --git a/events/welcome-han-liu-as-new-committer/index.html b/events/welcome-han-liu-as-new-committer/index.html
index b2dc2a6..f2bf359 100644
--- a/events/welcome-han-liu-as-new-committer/index.html
+++ b/events/welcome-han-liu-as-new-committer/index.html
@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-han-liu-as-new-committer/" />
<meta property="article:published_time" content="2020-02-08T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Han Liu as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Han Liu (a.k.a mrproliu) has been voted as a new committer.">
<meta itemprop="datePublished" content="2020-02-08T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="16">
diff --git a/events/welcome-haochao-zhuang-as-new-committer/index.html b/events/welcome-haochao-zhuang-as-new-committer/index.html
index 44e20a1..eb19ceb 100644
--- a/events/welcome-haochao-zhuang-as-new-committer/index.html
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@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-haochao-zhuang-as-new-committer/" />
<meta property="article:published_time" content="2019-10-20T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Haochao Zhuang as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Haochao Zhuang (a.k.a dmsolr) has been voted as a new committer.">
<meta itemprop="datePublished" content="2019-10-20T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="16">
diff --git a/events/welcome-haochao-zhuang-to-join-the-pmc/index.html b/events/welcome-haochao-zhuang-to-join-the-pmc/index.html
index ea56771..8a11106 100644
--- a/events/welcome-haochao-zhuang-to-join-the-pmc/index.html
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@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-haochao-zhuang-to-join-the-pmc/" />
<meta property="article:published_time" content="2020-03-05T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Haochao Zhuang to join the PMC">
<meta itemprop="description" content="Based on his continuous contributions, Haochao Zhuang (a.k.a dmsolr) has been invited to join the PMC. Welcome aboard.">
<meta itemprop="datePublished" content="2020-03-05T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="18">
diff --git a/events/welcome-hongwei-zhai-to-join-the-pmc/index.html b/events/welcome-hongwei-zhai-to-join-the-pmc/index.html
index 646d27a..5c52080 100644
--- a/events/welcome-hongwei-zhai-to-join-the-pmc/index.html
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@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-hongwei-zhai-to-join-the-pmc/" />
<meta property="article:published_time" content="2020-01-03T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Hongwei Zhai to join the PMC">
<meta itemprop="description" content="Based on his continuous contributions, Hongwei Zhai (a.k.a innerpeacez) has been invited to join the PMC. Welcome aboard.">
<meta itemprop="datePublished" content="2020-01-03T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
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<meta itemprop="wordCount" content="18">
diff --git a/events/welcome-huaxi-jiang-as-new-committer/index.html b/events/welcome-huaxi-jiang-as-new-committer/index.html
index 120aefe..adf5ccb 100644
--- a/events/welcome-huaxi-jiang-as-new-committer/index.html
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<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-huaxi-jiang-as-new-committer/" />
<meta property="article:published_time" content="2020-09-28T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Huaxi Jiang as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Huaxi Jiang (a.k.a fgksgf) has been voted as a new committer.">
<meta itemprop="datePublished" content="2020-09-28T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
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<meta itemprop="wordCount" content="16">
diff --git a/events/welcome-jian-tan-as-a-new-committer/index.html b/events/welcome-jian-tan-as-a-new-committer/index.html
index 15ba8d3..22c370d 100644
--- a/events/welcome-jian-tan-as-a-new-committer/index.html
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@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-jian-tan-as-a-new-committer/" />
<meta property="article:published_time" content="2018-12-02T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Jian Tan as a new committer">
<meta itemprop="description" content="Based on his contributions to the project, he has been accepted as SkyWalking committer. Welcome aboard.">
<meta itemprop="datePublished" content="2018-12-02T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
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<meta itemprop="wordCount" content="16">
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index 50d3ec1..1648d6c 100644
--- a/events/welcome-jian-tan-as-a-new-ppmc/index.html
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@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-jian-tan-as-a-new-ppmc/" />
<meta property="article:published_time" content="2019-01-29T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Jian Tan as a new PPMC">
<meta itemprop="description" content="Based on his contributions to the project, he has been accepted as SkyWalking PPMC. Welcome aboard.">
<meta itemprop="datePublished" content="2019-01-29T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
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<meta itemprop="wordCount" content="16">
diff --git a/events/welcome-jiapeng-liu-as-new-committer/index.html b/events/welcome-jiapeng-liu-as-new-committer/index.html
index 3cd0690..9fb84ca 100644
--- a/events/welcome-jiapeng-liu-as-new-committer/index.html
+++ b/events/welcome-jiapeng-liu-as-new-committer/index.html
@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-jiapeng-liu-as-new-committer/" />
<meta property="article:published_time" content="2020-11-05T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Jiapeng Liu as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Jiapeng Liu (a.k.a evanljp) has been voted as a new committer.">
<meta itemprop="datePublished" content="2020-11-05T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
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<meta itemprop="wordCount" content="16">
diff --git a/events/welcome-jinlin-fu-as-new-committer/index.html b/events/welcome-jinlin-fu-as-new-committer/index.html
index ee1a103..461e61d 100644
--- a/events/welcome-jinlin-fu-as-new-committer/index.html
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@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-jinlin-fu-as-new-committer/" />
<meta property="article:published_time" content="2019-01-10T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Jinlin Fu as new committer">
<meta itemprop="description" content="Jinlin Fu has contributed 4 new plugins, including gson, activemq, rabbitmq and canal, which made SkyWalking supporting all mainstream OSS MQ. Also provide several documents and bug fixes. The SkyWalking PPMC based on these, promote him as new committer. Welcome on board.">
<meta itemprop="datePublished" content="2019-01-10T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
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<meta itemprop="wordCount" content="42">
diff --git a/events/welcome-lang-li-as-a-new-committer/index.html b/events/welcome-lang-li-as-a-new-committer/index.html
index 646fe57..2f80e11 100644
--- a/events/welcome-lang-li-as-a-new-committer/index.html
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@@ -21,11 +21,11 @@
<meta property="og:type" content="article" />
<meta property="og:url" content="https://skywalking.apache.org/events/welcome-lang-li-as-a-new-committer/" />
<meta property="article:published_time" content="2019-12-06T00:00:00+00:00" />
-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Lang Li as a new committer">
<meta itemprop="description" content="Based on his contributions to the project, he has been accepted as SkyWalking committer. Welcome aboard.">
<meta itemprop="datePublished" content="2019-12-06T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
+<meta itemprop="dateModified" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="wordCount" content="16">
diff --git a/events/welcome-ming-wen-as-new-committer/index.html b/events/welcome-ming-wen-as-new-committer/index.html
index 54242de..8ac94c3 100644
--- a/events/welcome-ming-wen-as-new-committer/index.html
+++ b/events/welcome-ming-wen-as-new-committer/index.html
@@ -21,11 +21,11 @@
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<meta property="og:url" content="https://skywalking.apache.org/events/welcome-ming-wen-as-new-committer/" />
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<meta itemprop="name" content="Welcome Ming Wen as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Ming Wen (a.k.a moonming) has been voted as a new committer.">
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<meta itemprop="description" content="Based on her continuous contributions, Qiuxia Fan (a.k.a Fine0830) has been voted as a new committer.">
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<meta itemprop="name" content="Welcome Wei Hua as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Wei Hua (a.k.a alonelaval) has been voted as a new committer.">
<meta itemprop="datePublished" content="2020-08-01T00:00:00+00:00" />
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<meta itemprop="name" content="Welcome Wei Zhang as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Wei Zhang (a.k.a arugal) has been voted as a new committer.">
<meta itemprop="datePublished" content="2019-11-14T00:00:00+00:00" />
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<meta itemprop="name" content="Welcome Weijie Zou as a new committer">
<meta itemprop="description" content="Based on his contributions to the skywalking ui project, Weijie Zou (a.k.a Kdump) has been accepted as a new committer.">
<meta itemprop="datePublished" content="2019-09-10T00:00:00+00:00" />
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<meta itemprop="name" content="Welcome Weiyi Liu as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Weiyi Liu (a.k.a wayilau) has been voted as a new committer.">
<meta itemprop="datePublished" content="2019-12-10T00:00:00+00:00" />
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<meta itemprop="name" content="Welcome Yanlong He as a new committer">
<meta itemprop="description" content="Based on his contributions to the skywalking PHP project, Yanlong He (a.k.a heyanlong has been accepted as a new committer.">
<meta itemprop="datePublished" content="2019-08-09T00:00:00+00:00" />
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+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Yao Wang as a new PPMC">
<meta itemprop="description" content="Based on his contributions. Including created RocketBot as our secondary UI, new website and very cool trace view page in next release. he has been accepted as SkyWalking PPMC. Welcome aboard.">
<meta itemprop="datePublished" content="2018-12-22T00:00:00+00:00" />
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+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Yixiong Cao as a new committer">
<meta itemprop="description" content="Based on his contributions to the project, he has been accepted as SkyWalking committer. Welcome aboard.">
<meta itemprop="datePublished" content="2018-12-10T00:00:00+00:00" />
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<meta itemprop="name" content="Welcome Yuguang Zhao as a new committer">
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+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Yuguang Zhao to join the PMC">
<meta itemprop="description" content="Based on his continuous contributions, Yuguang Zhao (a.k.a zhaoyuguang) has been invited to join the PMC. Welcome aboard.">
<meta itemprop="datePublished" content="2019-08-27T00:00:00+00:00" />
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<meta itemprop="name" content="Welcome Zhenxu Ke as a new committer">
<meta itemprop="description" content="Based on his continuous contributions, Zhenxu Ke (a.k.a kezhenxu94) has been voted as a new committer.">
<meta itemprop="datePublished" content="2019-06-17T00:00:00+00:00" />
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<meta itemprop="name" content="Welcome Zhenxu Ke to join the PMC">
<meta itemprop="description" content="Based on his continuous contributions, Zhenxu Ke (a.k.a kezhenxu94) has been invited to join the PMC. Welcome aboard.">
<meta itemprop="datePublished" content="2019-08-23T00:00:00+00:00" />
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<meta property="og:url" content="https://skywalking.apache.org/events/welcome-zhusheng-xu-as-new-committer/" />
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+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="Welcome Zhusheng Xu as new committer">
<meta itemprop="description" content="Based on his continuous contributions, Zhusheng Xu (a.k.a aderm) has been voted as a new committer.">
<meta itemprop="datePublished" content="2020-02-21T00:00:00+00:00" />
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diff --git a/index.json b/index.json
index 1438d7b..2e17e1c 100644
--- a/index.json
+++ b/index.json
@@ -1 +1 @@
-[{"body":"SkyWalking 8.3.0 is released. Go to downloads page to find release tars.\nProject Test: ElasticSearch version 7.0.0 and 7.9.3 as storage are E2E tested. Test: Bump up testcontainers version to work around the Docker bug on MacOS. Java Agent Support propagate the sending timestamp in MQ plugins to calculate the transfer latency in the async MQ scenarios. Support auto-tag with the fixed values propagated in the correlation context. Make HttpClient 3.x, 4.x, and HttpAsyncClient [...]
\ No newline at end of file
+[{"body":" Author: Zhenxu Ke, Sheng Wu, and Tevah Platt. tetrate.io Original link, Tetrate.io blog Dec. 03th, 2020 Apache SkyWalking: an APM (application performance monitor) system, especially designed for microservices, cloud native, and container-based (Docker, Kubernetes, Mesos) architectures.\nEnvoy Access Log Service: Access Log Service (ALS) is an Envoy extension that emits detailed access logs of all requests going through Envoy.\nBackground Apache SkyWalking has long supported [...]
\ No newline at end of file
diff --git a/index.xml b/index.xml
index 86fcdd6..c16d6c2 100644
--- a/index.xml
+++ b/index.xml
@@ -13,6 +13,164 @@
<item>
+ <title>Blog: Observe Service Mesh with SkyWalking and Envoy Access Log Service</title>
+ <link>https://skywalking.apache.org/blog/2020-12-03-obs-service-mesh-with-sw-and-als/</link>
+ <pubDate>Thu, 03 Dec 2020 00:00:00 +0000</pubDate>
+
+ <guid>https://skywalking.apache.org/blog/2020-12-03-obs-service-mesh-with-sw-and-als/</guid>
+ <description>
+
+
+ <p><img src="canyonhorseshoe.jpg" alt=""></p>
+<ul>
+<li>Author: Zhenxu Ke, Sheng Wu, and Tevah Platt. tetrate.io</li>
+<li>Original link, <a href="https://www.tetrate.io/blog/observe-service-mesh-with-skywalking-and-envoy-access-log-service/">Tetrate.io blog</a></li>
+<li>Dec. 03th, 2020</li>
+</ul>
+<p><a href="https://github.com/apache/skywalking">Apache SkyWalking</a>: an APM (application performance monitor) system, especially designed for microservices, cloud native, and container-based (Docker, Kubernetes, Mesos) architectures.</p>
+<p><a href="https://www.envoyproxy.io/docs/envoy/latest/api-v2/service/accesslog/v2/als.proto">Envoy Access Log Service</a>: Access Log Service (ALS) is an Envoy extension that emits detailed access logs of all requests going through Envoy.</p>
+<h2 id="background">Background</h2>
+<p>Apache SkyWalking has long supported observability in service mesh with Istio Mixer adapter. But since v1.5, Istio began to deprecate Mixer due to its poor performance in large scale clusters. Mixer’s functionalities have been moved into the Envoy proxies, and is supported only through the 1.7 Istio release.
+On the other hand, <a href="https://github.com/wu-sheng">Sheng Wu</a> and <a href="https://github.com/lizan">Lizan Zhou</a> presented a better solution based on the Apache SkyWalking and Envoy ALS on <a href="https://kccncosschn19eng.sched.com/event/NroB/observability-in-service-mesh-powered-by-envoy-and-apache-skywalking-sheng-wu-lizan-zhou-tetrate">KubeCon China 2019</a>, to reduce the performance impact brought by Mixer, whi [...]
+If you are looking for a more efficient solution to observe your service mesh instead of using a Mixer-based solution, this is exactly what you need. In this tutorial, we will explain a little bit how the new solution works, and apply it to the bookinfo application in practice.</p>
+<h2 id="how-it-works">How it works</h2>
+<p>From a perspective of observability, Envoy can be typically deployed in 2 modes, sidecar, and router. As a sidecar, Envoy mostly represents a single service to receive and send requests (2 and 3 in the picture below). While as a proxy, Envoy may represent many services (1 in the picture below).</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.25.17-PM.png" alt="Example of Envoy deployment, as front proxy and sidecar"></p>
+<p>In both modes, the logs emitted by ALS include a node identifier. The identifier starts with <code>router~</code> (or <code>ingress~</code>) in router mode and <code>sidecar~</code> in sidecar proxy mode.</p>
+<p>Apart from the node identifier, there are <a href="https://github.com/envoyproxy/envoy/blob/549164c42cae84b59154ca4c36009e408aa10b52/generated_api_shadow/envoy/data/accesslog/v2/accesslog.proto">several noteworthy properties in the access logs</a> that will be used in this solution:</p>
+<ul>
+<li>
+<p><code>downstream_direct_remote_address</code>: This field is the downstream direct remote address on which the request from the user was received. Note: This is always the physical peer, even if the remote address is inferred from for example the <code>x-forwarded-for</code> header, proxy protocol, etc.</p>
+</li>
+<li>
+<p><code>downstream_remote_address</code>: The remote/origin address on which the request from the user was received.</p>
+</li>
+<li>
+<p><code>downstream_local_address</code>: The local/destination address on which the request from the user was received.</p>
+</li>
+<li>
+<p><code>upstream_remote_address</code>: The upstream remote/destination address that handles this exchange.</p>
+</li>
+<li>
+<p><code>upstream_local_address</code>: The upstream local/origin address that handles this exchange.</p>
+</li>
+<li>
+<p><code>upstream_cluster</code>: The upstream cluster that <em>upstream_remote_address</em> belongs to.</p>
+</li>
+</ul>
+<p>We will discuss more about the properties in the following sections.</p>
+<h3 id="sidecar">Sidecar</h3>
+<p>When serving as a sidecar, Envoy is deployed alongside a service, and delegates all the incoming/outgoing requests to/from the service.</p>
+<ol>
+<li>
+<p><strong>Delegating incoming requests:</strong> in this case, Envoy acts as a server side sidecar, and sets the <code>upstream_cluster</code> in form of <code>inbound|portNumber|portName|Hostname[or]SidecarScopeID</code>.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.37.49-PM.png" alt=""></p>
+<p>The SkyWalking analyzer checks whether either <code>downstream_remote_address</code> can be mapped to a Kubernetes service:</p>
+<p>a. If there is a service (say <code>Service B</code>) whose implementation is running in this IP(and port), then we have a service-to-service relation, <code>Service B -&gt; Service A</code>, which can be used to build the topology. Together with the <code>start_time</code> and <code>duration</code> fields in the access log, we have the latency metrics now.</p>
+<p>b. If there is no service that can be mapped to <code>downstream_remote_address</code>, then the request may come from a service out of the mesh. Since SkyWalking cannot identify the source service where the requests come from, it simply generates the metrics without source service, according to the <a href="https://wu-sheng.github.io/STAM/">topology analysis method</a>. The topology can be built as accurately as possible, and the metrics detected [...]
+</li>
+<li>
+<p><strong>Delegating outgoing requests:</strong> in this case, Envoy acts as a client-side sidecar, and sets the <code>upstream_cluster</code> in form of <code>outbound|&lt;port&gt;|&lt;subset&gt;|&lt;serviceFQDN&gt;</code>.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.43.16-PM.png" alt=""></p>
+<p>Client side detection is relatively simpler than (1. Delegating incoming requests). If <code>upstream_remote_address</code> is another sidecar or proxy, we simply get the mapped service name and generate the topology and metrics. Otherwise, we have no idea what it is and consider it an <code>UNKNOWN</code> service.</p>
+</li>
+</ol>
+<h3 id="proxy-role">Proxy role</h3>
+<p>When Envoy is deployed as a proxy, it is an independent service itself and doesn&rsquo;t represent any other service like a sidecar does. Therefore, we can build client-side metrics as well as server-side metrics.</p>
+<p><img src="Screen-Shot-2020-12-02-at-2.46.56-PM.png" alt=""></p>
+<h2 id="example">Example</h2>
+<p>In this section, we will use the typical <a href="https://istio.io/latest/docs/examples/bookinfo/">bookinfo application</a> to demonstrate how Apache SkyWalking 8.3.0+ (the latest version up to Nov. 30th, 2020) works together with Envoy ALS to observe a service mesh.</p>
+<h3 id="installing-kubernetes">Installing Kubernetes</h3>
+<p>SkyWalking 8.3.0 supports the Envoy ALS solution under both Kubernetes environment and virtual machines (VM) environment, in this tutorial, we’ll only focus on the Kubernetes scenario, for VM solution, please stay tuned for our next blog, so we need to install Kubernetes before taking further steps.</p>
+<p>In this tutorial, we will use the <a href="https://minikube.sigs.k8s.io/docs/">Minikube</a> tool to quickly set up a local Kubernetes(v1.17) cluster for testing. In order to run all the needed components, including the bookinfo application, the SkyWalking OAP and WebUI, the cluster may need up to 4GB RAM and 2 CPU cores.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">minikube start --memory<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">4096</span> --cpus<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-we [...]
+</code></pre></div><p>Next, run <code>kubectl get pods --namespace=kube-system --watch</code> to check whether all the Kubernetes components are ready. If not, wait for the readiness before going on.</p>
+<h3 id="installing-istio">Installing Istio</h3>
+<p>Istio provides a very convenient way to configure the Envoy proxy and enable the access log service. The built-in configuration profiles free us from lots of manual operations. So, for demonstration purposes, we will use Istio through this tutorial.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">ISTIO_VERSION</span><span style="color:#ce5c00;font-weight:bold">=</span>1.7.1
+curl -L https://istio.io/downloadIstio <span style="color:#000;font-weight:bold">|</span> sh -
+sudo mv <span style="color:#000">$PWD</span>/istio-<span style="color:#000">$ISTIO_VERSION</span>/bin/istioctl /usr/local/bin/
+istioctl install --set <span style="color:#000">profile</span><span style="color:#ce5c00;font-weight:bold">=</span>demo
+kubectl label namespace default istio-injection<span style="color:#ce5c00;font-weight:bold">=</span>enabled
+</code></pre></div><p>Run <code>kubectl get pods --namespace=istio-system --watch</code> to check whether all the Istio components are ready. If not, wait for the readiness before going on.</p>
+<h3 id="enabling-als">Enabling ALS</h3>
+<p>The <code>demo</code> profile doesn’t enable ALS by default. We need to reconfigure it to enable ALS via some configuration.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">istioctl manifest install <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.enableEnvoyAccessLogService<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.defaultConfig.envoyAccessLogService.address<span style="color:#ce5c00;font-weight:bold">=</span>skywalking-oap.istio-system:11800
+</code></pre></div><p>The example command <code>--set meshConfig.enableEnvoyAccessLogService=true</code> enables the Envoy access log service in the mesh. And as we said earlier, ALS is essentially a gRPC service that emits requests logs. The config <code>meshConfig.defaultConfig.envoyAccessLogService.address=skywalking-oap.istio-system:11800</code> tells this gRPC service where to emit the logs, say <code>skywalking-oap.istio-system [...]
+<p>NOTE:
+You can also enable the ALS when installing Istio so that you don’t need to restart Istio after installation:</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell">istioctl install --set <span style="color:#000">profile</span><span style="color:#ce5c00;font-weight:bold">=</span>demo <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.enableEnvoyAccessLogService<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set meshConfig.defaultConfig.envoyAccessLogService.address<span style="color:#ce5c00;font-weight:bold">=</span>skywalking-oap.istio-system:11800
+kubectl label namespace default istio-injection<span style="color:#ce5c00;font-weight:bold">=</span>enabled
+</code></pre></div><h3 id="deploying-apache-skywalking">Deploying Apache SkyWalking</h3>
+<p>The SkyWalking community provides a <a href="https://helm.sh">Helm</a> Chart to make it easier to deploy SkyWalking and its dependent services in Kubernetes. The Helm Chart can be found at the <a href="https://github.com/apache/skywalking-kubernetes">GitHub repository</a>.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#8f5902;font-style:italic"># Install Helm</span>
+curl -sSLO https://get.helm.sh/helm-v3.0.0-linux-amd64.tar.gz
+sudo tar xz -C /usr/local/bin --strip-components<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">1</span> linux-amd64/helm -f helm-v3.0.0-linux-amd64.tar.gz
+<span style="color:#8f5902;font-style:italic"># Clone SkyWalking Helm Chart</span>
+git clone https://github.com/apache/skywalking-kubernetes
+<span style="color:#204a87">cd</span> skywalking-kubernetes/chart
+git reset --hard dd749f25913830c47a97430618cefc4167612e75
+<span style="color:#8f5902;font-style:italic"># Update dependencies</span>
+helm dep up skywalking
+<span style="color:#8f5902;font-style:italic"># Deploy SkyWalking</span>
+helm -n istio-system install skywalking skywalking <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.storageType<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#4e9a06">&#39;h2&#39;</span><span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set ui.image.tag<span style="color:#ce5c00;font-weight:bold">=</span>8.3.0 <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.image.tag<span style="color:#ce5c00;font-weight:bold">=</span>8.3.0-es7 <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.replicas<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#0000cf;font-weight:bold">1</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.env.SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS<span style="color:#ce5c00;font-weight:bold">=</span>k8s-mesh <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.env.JAVA_OPTS<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#4e9a06">&#39;-Dmode=&#39;</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set oap.envoy.als.enabled<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">true</span> <span style="color:#4e9a06">\
+</span><span style="color:#4e9a06"></span> --set elasticsearch.enabled<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87">false</span>
+</code></pre></div><p>We deploy SkyWalking to the namespace <code>istio-system</code>, so that SkyWalking OAP service can be accessed by <code>skywalking-oap.istio-system:11800</code>, to which we told ALS to emit their logs, in the previous step.</p>
+<p>We also enable the ALS analyzer in the SkyWalking OAP: <code>oap.env.SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS=k8s-mesh</code>. The analyzer parses the access logs and maps the IP addresses in the logs to the real service names in the Kubernetes, to build a topology.</p>
+<p>In order to retrieve the metadata (such as Pod IP and service names) from a Kubernetes cluster for IP mappings, we also set <code>oap.envoy.als.enabled=true</code>, to apply for a <code>ClusterRole</code> that has access to the metadata.</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">POD_NAME</span><span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#204a87;font-weight:bold">$(</span>kubectl get pods -A -l & [...]
+<span style="color:#204a87">echo</span> <span style="color:#000">$POD_NAME</span>
+kubectl -n istio-system port-forward <span style="color:#000">$POD_NAME</span> 8080:8080
+</code></pre></div><p>Now navigate your browser to http://localhost:8080 . You should be able to see the SkyWalking dashboard. The dashboard is empty for now, but after we deploy the demo application and generate traffic, it should be filled up later.</p>
+<p><img src="Screen-Shot-2020-12-02-at-3.01.03-PM.png" alt=""></p>
+<h3 id="deploying-bookinfo-application">Deploying Bookinfo application</h3>
+<p>Run:</p>
+<div class="highlight"><pre style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-shell" data-lang="shell"><span style="color:#204a87">export</span> <span style="color:#000">ISTIO_VERSION</span><span style="color:#ce5c00;font-weight:bold">=</span>1.7.1
+kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#000">$ISTIO_VERSION</span>/samples/bookinfo/platform/kube/bookinfo.yaml
+kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#000">$ISTIO_VERSION</span>/samples/bookinfo/networking/bookinfo-gateway.yaml
+kubectl <span style="color:#204a87">wait</span> --for<span style="color:#ce5c00;font-weight:bold">=</span><span style="color:#000">condition</span><span style="color:#ce5c00;font-weight:bold">=</span>Ready pods --all --timeout<span style="color:#ce5c00;font-weight:bold">=</span>1200s
+minikube tunnel
+</code></pre></div><p>Then navigate your browser to http://localhost/productpage. You should be able to see the typical bookinfo application. Refresh the webpage several times to generate enough access logs.</p>
+<h3 id="done">Done!</h3>
+<p>And you’re all done! Check out the SkyWalking WebUI again. You should see the topology of the bookinfo application, as well the metrics of each individual service of the bookinfo application.</p>
+<p><img src="Screen-Shot-2020-12-02-at-3.05.24-PM.png" alt="">
+<img src="Screen-Shot-2020-12-02-at-3.11.55-PM.png" alt=""></p>
+<h3 id="troubleshooting">Troubleshooting</h3>
+<ul>
+<li>Check all pods status: <code>kubectl get pods -A</code>.</li>
+<li>SkyWalking OAP logs: <code>kubectl -n istio-system logs -f $(kubectl get pod -A -l &quot;app=skywalking,release=skywalking,component=oap&quot; -o name)</code>.</li>
+<li>SkyWalking WebUI logs: <code>kubectl -n istio-system logs -f $(kubectl get pod -A -l &quot;app=skywalking,release=skywalking,component=ui&quot; -o name)</code>.</li>
+<li>Make sure the time zone at the bottom-right of the WebUI is set to <code>UTC +0</code>.</li>
+</ul>
+<h2 id="customizing-service-names">Customizing Service Names</h2>
+<p>The SkyWalking community brought more improvements to the ALS solution in the 8.3.0 version. You can decide how to compose the service names when mapping from the IP addresses, with variables <code>service</code> and <code>pod</code>. For instance, configuring <code>K8S_SERVICE_NAME_RULE</code> to the expression <code>${service.metadata.name}-${pod.metadata.labels.version}</code> gets service names with version label such as <co [...]
+<h2 id="working-als-with-vm">Working ALS with VM</h2>
+<p>Kubernetes is popular, but what about VMs? From what we discussed above, in order to map the IPs to services, SkyWalking needs access to the Kubernetes cluster, fetching service metadata and Pod IPs. But in a VM environment, there is no source from which we can fetch those metadata.
+In the next post, we will introduce another ALS analyzer based on the Envoy metadata exchange mechanism. With this analyzer, you are able to observe a service mesh in the VM environment. Stay tuned!
+If you want to have commercial support for the ALS solution or hybrid mesh observability, <a href="https://www.tetrate.io/tetrate-service-bridge/">Tetrate Service Bridge, TSB</a> is another good option out there.</p>
+<h2 id="additional-resources">Additional Resources</h2>
+<ul>
+<li>KubeCon 2019 Recorded <a href="https://www.youtube.com/watch?v=tERm39ju9ew">Video</a>.</li>
+<li>Get more SkyWalking updates on <a href="https://skywalking.apache.org">the official website</a>.</li>
+<li>Read more about SkyWalking from Tetrate on our <a href="https://www.tetrate.io/blog/category/open-source/apache-skywalking/">blog</a>.</li>
+</ul>
+<p><em>Apache SkyWalking founder Sheng Wu, SkyWalking core maintainer Zhenxu Ke are Tetrate engineers, and Tevah Platt is a content writer for Tetrate. Tetrate helps organizations adopt open source service mesh tools, including Istio, Envoy, and Apache SkyWalking, so they can manage microservices, run service mesh on any infrastructure, and modernize their applications.</em></p>
+
+ </description>
+ </item>
+
+ <item>
<title>Blog: The first design of Satellite 0.1.0</title>
<link>https://skywalking.apache.org/blog/2020-11-25-skywalking-satellite-0.1.0-design/</link>
<pubDate>Wed, 25 Nov 2020 00:00:00 +0000</pubDate>
diff --git a/search/index.html b/search/index.html
index 4babd4d..98c5a79 100644
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<meta itemprop="name" content="Search Results">
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@@ -3,862 +3,869 @@
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index 3c5645e..2aba10d 100644
--- a/zh/2018-05-24-skywalking-net/index.html
+++ b/zh/2018-05-24-skywalking-net/index.html
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<meta itemprop="name" content="Apache SkyWalking 为.NET Core带来开箱即用的分布式追踪和应用性能监控">
<meta itemprop="description" content="SkyWalking .NET Core SDK 现已可用。">
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index 992d16d..21d738f 100644
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-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
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<meta itemprop="description" content="本文纯粹介绍 Apache SkyWalking 如何使用，面对的群体包括了解和不了解 SkyWalking 原理的使用者和打算使用者。">
<meta itemprop="datePublished" content="2018-12-18T00:00:00+00:00" />
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-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="SkyWalking apm-sniffer 原理学习与插件编写">
<meta itemprop="description" content="SkyWalking apm-sniffer 插件编写实践 与 ByteBuddy实现类转化的实践。">
<meta itemprop="datePublished" content="2018-12-21T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2020-12-02T09:52:57+08:00" />
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-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
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<meta itemprop="description" content="源码解析的博客，可以帮助你更好的读懂 SkyWalking 的源码。">
<meta itemprop="datePublished" content="2018-12-21T00:00:00+00:00" />
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index a20d4cc..a191e30 100644
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-<meta property="article:modified_time" content="2020-12-02T09:52:57+08:00" />
+<meta property="article:modified_time" content="2020-12-03T14:51:36+08:00" />
<meta itemprop="name" content="关于 ElastiSsearch 因 basic 认证导致 SkyWalking 无法正常调用接口问题">
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<meta itemprop="datePublished" content="2019-01-02T00:00:00+00:00" />
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index 9534c01..17c64a4 100644
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index 6db922e..c195762 100644
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<meta itemprop="description" content="本文将基于SkyWalking 6.0.0-GA-SNAPSHOT版本，以编写Redis客户端Lettuce的SkyWalking Java Agent 插件为例，与大家分享我贡献PR的过程，希望对大家了解SkyWalking Java Agent插件有所帮助。">
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<meta itemprop="description" content="本文将我们线上使用skywalking时遇到的常见的问题做一个分析和解决，希望给社区更多的其他的新老用户做个参考...">
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<meta itemprop="description" content="在为公司进行调用链跟踪系统进行技术选型的过程中，详细的了解了一下Skywalking，同时也进行了初步的实践，给其他同样在了解Skywalking的同学提供一些参考。">
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<meta itemprop="name" content="Apache SkyWalking 8.0.1 发布">
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