[GitHub] daisy-ycguo commented on a change in pull request #265: Add alarm provider

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daisy-ycguo commented on a change in pull request #265: Add alarm provider
URL: https://github.com/apache/incubator-openwhisk-deploy-kube/pull/265#discussion_r206790069
 
 

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 File path: helm/providers/charts/alarm/README.md
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+
+# Use Helm to deploy alarm provider and package
+
+This chart is to deploy alarm provider and package to OpenWhisk on a Kubernetes using Helm.
+
+## Preconditions
+
+Alarm package can only be successfully installed under these two preconditions:
++ persistentvolumes (aka 'pv') is defined in your Kubernetes cluster. You can verify by `kubectl get pv`.
++ `KubernetesContainerFactory` is used as the [Invoker Container Factory](https://github.com/apache/incubator-openwhisk-deploy-kube/blob/master/docs/configurationChoices.md#invoker-container-factory) in your Kubernetes cluster. In order to do that, you can add below configuration in your `mycluster.yaml` when you are deploying OpenWhisk with Helm:
+```
 
 Review comment:
   The alarmWeb action needs to access database. The db_host passed to alarmWeb action is "couchdb.openwhisk.svc.cluster.local". If alarmWeb action is running outside the scope of Kubernetes, it cannot resolve the host name. So there are two ways to solve this issue: use kubernetes to spawn action containers, or config a "CONFIG_whisk_containerFactory_containerArgs_dnsServers_0" in invoker environment. I can update the README to describe these two solutions. Do you have other choices?

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