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Posted to commits@zipkin.apache.org by ab...@apache.org on 2019/05/17 10:05:51 UTC
[incubator-zipkin-website] branch asf-site updated (2a67d70 ->
0b16db2)
This is an automated email from the ASF dual-hosted git repository.
abesto pushed a change to branch asf-site
in repository https://gitbox.apache.org/repos/asf/incubator-zipkin-website.git.
from 2a67d70 Automatic site generation from 3d52fac
new f854b70 force adds zipkin-api
new 0b16db2 Automatic site generation from 815638a
The 2 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails. The revisions
listed as "add" were already present in the repository and have only
been added to this reference.
Summary of changes:
Jenkinsfile | 12 +-
zipkin-api/DISCLAIMER | 5 +
zipkin-api/Jenkinsfile | 78 +++++++
LICENSE => zipkin-api/LICENSE | 1 -
zipkin-api/NOTICE | 5 +
zipkin-api/zipkin-api.yaml | 441 +++++++++++++++++++++++++++++++++++
zipkin-api/zipkin.proto | 237 +++++++++++++++++++
zipkin-api/zipkin2-api.yaml | 521 ++++++++++++++++++++++++++++++++++++++++++
8 files changed, 1294 insertions(+), 6 deletions(-)
create mode 100644 zipkin-api/DISCLAIMER
create mode 100644 zipkin-api/Jenkinsfile
copy LICENSE => zipkin-api/LICENSE (99%)
create mode 100644 zipkin-api/NOTICE
create mode 100644 zipkin-api/zipkin-api.yaml
create mode 100644 zipkin-api/zipkin.proto
create mode 100644 zipkin-api/zipkin2-api.yaml
[incubator-zipkin-website] 01/02: force adds zipkin-api
Posted by ab...@apache.org.
This is an automated email from the ASF dual-hosted git repository.
abesto pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/incubator-zipkin-website.git
commit f854b709276da5c8945754616d85cb38ea5a3477
Author: jenkins <bu...@apache.org>
AuthorDate: Fri May 17 10:05:44 2019 +0000
force adds zipkin-api
---
zipkin-api/zipkin-api.yaml | 441 +++++++++++++++++++++++++++++++++++++
zipkin-api/zipkin.proto | 237 ++++++++++++++++++++
zipkin-api/zipkin2-api.yaml | 521 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1199 insertions(+)
diff --git a/zipkin-api/zipkin-api.yaml b/zipkin-api/zipkin-api.yaml
new file mode 100644
index 0000000..2f4a190
--- /dev/null
+++ b/zipkin-api/zipkin-api.yaml
@@ -0,0 +1,441 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+swagger: "2.0"
+info:
+ version: "1.0.0"
+ title: Zipkin API
+ description: |
+ Zipkin's Query api is rooted at `api/v1`, on a host that by default listens
+ on port 9411. It primarily serves the zipkin-ui, although it includes a POST
+ endpoint that can receive spans.
+host: localhost:9411
+basePath: /api/v1
+schemes:
+ - http
+ - https
+consumes:
+ - application/json
+produces:
+ - application/json
+paths:
+ /services:
+ get:
+ description: |
+ Returns a list of all service names associated with annotations.
+ responses:
+ '200':
+ description: Succes
+ schema:
+ type: array
+ items:
+ type: string
+ '400':
+ description: Bad Request Error
+ /spans:
+ get:
+ description: Get all the span names logged by a particular service
+ parameters:
+ - name: serviceName
+ in: query
+ required: true
+ description: |
+ Ex zipkin-server (required) - service that logged an annotation in a
+ trace. The /services endpoint enumerates possible input values.
+ type: string
+ responses:
+ '200':
+ description: OK
+ schema:
+ type: array
+ items:
+ type: string
+ '400':
+ description: Bad Request Error
+ post:
+ description: |
+ Uploads a list of spans encoded per content-type, for example json
+ or thrift (TBinaryProtocol big-endian).
+ consumes:
+ - application/json
+ - application/x-thrift
+ produces: []
+ parameters:
+ - name: span
+ in: body
+ description: A list of spans that belong to any trace.
+ required: true
+ schema:
+ $ref: "#/definitions/ListOfSpans"
+ responses:
+ '202':
+ description: Accepted
+ /traces:
+ get:
+ description: |
+ Invoking this request retrieves traces matching the below filters.
+
+ Results should be filtered against endTs, subject to limit and
+ lookback. For example, if endTs is 10:20 today, limit is 10, and
+ lookback is 7 days, traces returned should be those nearest to 10:20
+ today, not 10:20 a week ago.
+
+ Time units of endTs and lookback are milliseconds as opposed to
+ microseconds, the grain of Span.timestamp. Milliseconds is a more
+ familiar and supported granularity for query, index and windowing
+ functions
+ parameters:
+ - name: serviceName
+ in: query
+ required: false
+ description: |
+ Ex zipkin-server - service that logged an annotation in a trace.
+ Required when constraining on parameters except time and duration.
+ The /services endpoint enumerates possible input values.
+ type: string
+ - name: spanName
+ in: query
+ required: false
+ description: |
+ Ex my_span_name - name of a span in a trace.
+ Only return traces that contains spans with this name.
+ type: string
+ - name: annotationQuery
+ in: query
+ type: string
+ required: false
+ description: |
+ Ex. `http.uri=/foo and retried` - If key/value (has an `=`),
+ constrains against Span.binaryAnnotations of time string. If just
+ a word, constrains against Span.annotations. Any values are AND
+ against eachother. This means a span in the trace must match all of
+ these.
+ - name: minDuration
+ in: query
+ type: integer
+ description: |
+ Ex. 100000 (for 100ms). Only return traces whose `Span.duration` is
+ greater than or equal to minDuration microseconds.
+ - name: maxDuration
+ in: query
+ type: integer
+ description: |
+ Only return traces whose Span.duration is less than or equal to
+ `maxDuration` microseconds. Only valid with minDuration.
+ - name: endTs
+ in: query
+ type: integer
+ format: int64
+ description: |
+ Only return traces where all Span.timestamp are at or before this
+ time in epoch milliseconds. Defaults to current time.
+ - name: lookback
+ type: integer
+ format: int64
+ in: query
+ description: |
+ Only return traces where all Span.timestamp are at or after
+ (`endTs - * lookback`) in milliseconds. Defaults to `endTs`, limited
+ to a system parameter `QUERY_LOOKBACK`.
+ - name: limit
+ in: query
+ default: 10
+ type: integer
+ description: |
+ Maximum number of traces to return. Defaults to 10
+ responses:
+ '200':
+ description: OK
+ schema:
+ $ref: "#/definitions/ListOfTraces"
+ /trace/{traceId}:
+ get:
+ parameters:
+ - name: traceId
+ in: path
+ required: true
+ description: the 64 or 128-bit big endian, hex-encoded id of the trace as a path parameter.
+ type: string
+ - name: raw
+ in: query
+ required: false
+ description: |
+ Note this flag has no value. Ex. /trace/{traceId}?raw
+
+ Normally, the trace endpoint cleans trace data. For example, it merges
+ spans by id, adds missing timestamp or duration, corrects clock skew..
+
+ Specifying this flag is a debug case, when you are debugging zipkin
+ logic or zipkin instrumentation, and want to see the input to these
+ adjusters. For example, this might explain or rule out clock skew.
+ type: boolean
+ responses:
+ '200':
+ description: OK
+ schema:
+ $ref: "#/definitions/Trace"
+ '404':
+ description: "`traceId` not found"
+ /dependencies:
+ get:
+ description: |
+ Returns dependency links derived from spans.
+
+ Span names are in lowercase, rpc method for example. Conventionally,
+ when the span name isn't known, name = "unknown".
+ parameters:
+ - name: endTs
+ in: query
+ description: |
+ Only return links from spans where `Span.timestamp` are at or before
+ this time in epoch milliseconds.
+ required: true
+ type: integer
+ format: int64
+ - name: lookback
+ in: query
+ description: |
+ Only return links from spans where all Span.timestamp are at or after
+ (`endTs - * lookback`) in milliseconds. Defaults to `endTs`, limited
+ to a system parameter `QUERY_LOOKBACK`.
+ type: integer
+ format: int64
+ responses:
+ '200':
+ description: OK
+ schema:
+ type: array
+ title: ListOfDependencyLinks
+ items:
+ $ref: "#/definitions/DependencyLink"
+definitions:
+ Endpoint:
+ type: object
+ title: Endpoint
+ description: The network context of a node in the service graph
+ required:
+ - serviceName
+ properties:
+ serviceName:
+ type: string
+ description: |
+ Lower-case label of this node in the service graph, such as "favstar". Set
+ to empty string if unknown.
+
+ This is a primary label for trace lookup and aggregation, so it should be
+ intuitive and consistent. Many use a name from service discovery.
+ ipv4:
+ type: string
+ format: ipv4
+ description: |
+ The text representation of the primary IPv4 address associated with this
+ connection. Ex. 192.168.99.100 Absent if unknown.
+ ipv6:
+ type: string
+ format: ipv6
+ description: |
+ The text representation of the primary IPv6 address associated with a
+ connection. Ex. 2001:db8::c001 Absent if unknown.
+
+ Prefer using the ipv4 field for mapped addresses.
+ port:
+ type: integer
+ description: |
+ Depending on context, this could be a listen port or the client-side of a
+ socket. Absent if unknown. Please don't set to zero.
+ Annotation:
+ title: Annotation
+ type: object
+ required:
+ - timestamp
+ - value
+ description: |
+ Associates an event that explains latency with a timestamp.
+ Unlike log statements, annotations are often codes. Ex. "sr" for ServerReceive
+ properties:
+ timestamp:
+ type: integer
+ description: |
+ Epoch **microseconds** of this event.
+
+ For example, 1502787600000000 corresponds to 2017-08-15 09:00 UTC
+
+ This value should be set directly by instrumentation, using the most precise
+ value possible. For example, gettimeofday or multiplying epoch millis by 1000.
+ value:
+ type: string
+ description: |
+ Usually a short tag indicating an event, like "sr"
+
+ While possible to add larger data, such as garbage collection details, low
+ cardinality event names both keep the size of spans down and also are easy
+ to search against.
+ endpoint:
+ $ref: "#/definitions/Endpoint"
+ description: |
+ The host that recorded this span, primarily for query by service name.
+
+ Instrumentation should always record this. Usually, absent implies late
+ data. The IP address corresponding to this is usually the site local or
+ advertised service address. When present, the port indicates the listen
+ port.
+ BinaryAnnotation:
+ title: BinaryAnnotation
+ type: object
+ required:
+ - key
+ - value
+ description: |
+ Adds context to a span, for search, viewing and analysis.
+
+ For example, a key "your_app.version" would let you lookup traces by version.
+ A tag "sql.query" isn't searchable, but it can help in debugging when viewing
+ a trace.
+ properties:
+ key:
+ type: string
+ value:
+ type: string
+ endpoint:
+ $ref: "#/definitions/Endpoint"
+ description: |
+ The host that recorded this span, primarily for query by service name.
+
+ There is an exception, when the key is "sa", "ca" or "ma" this is an
+ address annotation. In such case, the endpoint is not what recorded the
+ span, rather the remote address. The value field is set to boolean true
+ in this case. This feature was refactored in v2 format as "remoteEndpoint"
+ ListOfSpans:
+ title: ListOfSpans
+ description: 'A list of spans with possibly different trace ids, in no particular order'
+ type: array
+ items:
+ $ref: "#/definitions/Span"
+ Trace:
+ title: Trace
+ type: array
+ description: 'List of spans who have the same trace id. Spans in the trace, and annotations in a span are sorted ascending by timestamp. ie first event should be first in the spans list.'
+ items:
+ $ref: "#/definitions/Span"
+ ListOfTraces:
+ title: ListOfTraces
+ type: array
+ items:
+ $ref: "#/definitions/Trace"
+ Span:
+ title: Span
+ type: object
+ required:
+ - traceId
+ - id
+ - name
+ properties:
+ traceId:
+ type: string
+ maxLength: 32
+ minLength: 16
+ pattern: "[a-z0-9]{16,32}"
+ description: |
+ Randomly generated, unique identifier for a trace, set on all spans within it.
+
+ Encoded as 16 or 32 lowercase hex characters in big endian byte order,
+ corresponding to 64 or 128 bits,
+ For example, a 128bit trace ID looks like 4e441824ec2b6a44ffdc9bb9a6453df3
+ name:
+ type: string
+ description: |
+ The logical operation this span represents in lowercase (e.g. rpc method).
+ Set to empty string if unknown.
+
+ As these are lookup labels, take care to ensure names are low cardinality.
+ For example, do not embed variables into the name.
+ parentId:
+ type: string
+ pattern: "[a-z0-9]{16}"
+ maxLength: 16
+ minLength: 16
+ description: 'The parent span ID or absent if this the root span in a trace.'
+ id:
+ type: string
+ maxLength: 16
+ minLength: 16
+ pattern: "[a-z0-9]{16}"
+ description: |
+ Unique 64bit identifier for this operation within the trace.
+
+ Encoded as 16 lowercase hex characters. For example ffdc9bb9a6453df3
+ timestamp:
+ type: integer
+ format: int64
+ description: |
+ Epoch microseconds of the start of this span, possibly absent if
+ incomplete.
+
+ For example, 1502787600000000 corresponds to 2017-08-15 09:00 UTC
+
+ This value should be set directly by instrumentation, using the most
+ precise value possible. For example, gettimeofday or multiplying epoch
+ millis by 1000.
+
+ There are three known edge-cases where this could be reported absent.
+ * A span was allocated but never started (ex not yet received a timestamp)
+ * The span's start event was lost
+ * Data about a completed span (ex tags) were sent after the fact
+ duration:
+ type: integer
+ format: int64
+ minimum: 1
+ description: |
+ Duration in **microseconds** of the critical path, if known. Durations of less
+ than one are rounded up. Duration of children can be longer than their
+ parents due to asynchronous operations.
+
+ For example 150 milliseconds is 150000 microseconds.
+ debug:
+ type: boolean
+ description: |
+ True is a request to store this span even if it overrides sampling policy.
+
+ This is true when the `X-B3-Flags` header has a value of 1.
+ annotations:
+ title: ListOfAnnotations
+ type: array
+ description: 'Associates events that explain latency with the time they happened.'
+ items:
+ $ref: '#/definitions/Annotation'
+ binaryAnnotations:
+ title: ListOfBinaryAnnotations
+ type: array
+ description: 'Binary Annotations are tags that give your span context for search, viewing and analysis.'
+ items:
+ $ref: '#/definitions/BinaryAnnotation'
+ DependencyLink:
+ title: DependencyLink
+ type: object
+ required:
+ - parent
+ - child
+ - callCount
+ properties:
+ parent:
+ type: string
+ child:
+ type: string
+ callCount:
+ type: integer
+ errorCount:
+ type: integer
diff --git a/zipkin-api/zipkin.proto b/zipkin-api/zipkin.proto
new file mode 100644
index 0000000..9e65112
--- /dev/null
+++ b/zipkin-api/zipkin.proto
@@ -0,0 +1,237 @@
+//
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+//
+syntax = "proto3";
+
+package zipkin.proto3;
+
+// In Java, the closest model type to this proto is in the "zipkin2" package
+option java_package = "zipkin2.proto3";
+option java_multiple_files = true;
+
+// A span is a single-host view of an operation. A trace is a series of spans
+// (often RPC calls) which nest to form a latency tree. Spans are in the same
+// trace when they share the same trace ID. The parent_id field establishes the
+// position of one span in the tree.
+//
+// The root span is where parent_id is Absent and usually has the longest
+// duration in the trace. However, nested asynchronous work can materialize as
+// child spans whose duration exceed the root span.
+//
+// Spans usually represent remote activity such as RPC calls, or messaging
+// producers and consumers. However, they can also represent in-process
+// activity in any position of the trace. For example, a root span could
+// represent a server receiving an initial client request. A root span could
+// also represent a scheduled job that has no remote context.
+//
+// Encoding notes:
+//
+// Epoch timestamp are encoded fixed64 as varint would also be 8 bytes, and more
+// expensive to encode and size. Duration is stored uint64, as often the numbers
+// are quite small.
+//
+// Default values are ok, as only natural numbers are used. For example, zero is
+// an invalid timestamp and an invalid duration, false values for debug or shared
+// are ignorable, and zero-length strings also coerce to null.
+//
+// The next id is 14.
+//
+// Note fields up to 15 take 1 byte to encode. Take care when adding new fields
+// https://developers.google.com/protocol-buffers/docs/proto3#assigning-tags
+message Span {
+ // Randomly generated, unique identifier for a trace, set on all spans within
+ // it.
+ //
+ // This field is required and encoded as 8 or 16 bytes, in big endian byte
+ // order.
+ bytes trace_id = 1;
+ // The parent span ID or absent if this the root span in a trace.
+ bytes parent_id = 2;
+ // Unique identifier for this operation within the trace.
+ //
+ // This field is required and encoded as 8 opaque bytes.
+ bytes id = 3;
+ // When present, kind clarifies timestamp, duration and remote_endpoint. When
+ // absent, the span is local or incomplete. Unlike client and server, there
+ // is no direct critical path latency relationship between producer and
+ // consumer spans.
+ enum Kind {
+ // Default value interpreted as absent.
+ SPAN_KIND_UNSPECIFIED = 0;
+ // The span represents the client side of an RPC operation, implying the
+ // following:
+ //
+ // timestamp is the moment a request was sent to the server.
+ // duration is the delay until a response or an error was received.
+ // remote_endpoint is the server.
+ CLIENT = 1;
+ // The span represents the server side of an RPC operation, implying the
+ // following:
+ //
+ // timestamp is the moment a client request was received.
+ // duration is the delay until a response was sent or an error.
+ // remote_endpoint is the client.
+ SERVER = 2;
+ // The span represents production of a message to a remote broker, implying
+ // the following:
+ //
+ // timestamp is the moment a message was sent to a destination.
+ // duration is the delay sending the message, such as batching.
+ // remote_endpoint is the broker.
+ PRODUCER = 3;
+ // The span represents consumption of a message from a remote broker, not
+ // time spent servicing it. For example, a message processor would be an
+ // in-process child span of a consumer. Consumer spans imply the following:
+ //
+ // timestamp is the moment a message was received from an origin.
+ // duration is the delay consuming the message, such as from backlog.
+ // remote_endpoint is the broker.
+ CONSUMER = 4;
+ }
+ // When present, used to interpret remote_endpoint
+ Kind kind = 4;
+ // The logical operation this span represents in lowercase (e.g. rpc method).
+ // Leave absent if unknown.
+ //
+ // As these are lookup labels, take care to ensure names are low cardinality.
+ // For example, do not embed variables into the name.
+ string name = 5;
+ // Epoch microseconds of the start of this span, possibly absent if
+ // incomplete.
+ //
+ // For example, 1502787600000000 corresponds to 2017-08-15 09:00 UTC
+ //
+ // This value should be set directly by instrumentation, using the most
+ // precise value possible. For example, gettimeofday or multiplying epoch
+ // millis by 1000.
+ //
+ // There are three known edge-cases where this could be reported absent.
+ // - A span was allocated but never started (ex not yet received a timestamp)
+ // - The span's start event was lost
+ // - Data about a completed span (ex tags) were sent after the fact
+ fixed64 timestamp = 6;
+ // Duration in microseconds of the critical path, if known. Durations of less
+ // than one are rounded up. Duration of children can be longer than their
+ // parents due to asynchronous operations.
+ //
+ // For example 150 milliseconds is 150000 microseconds.
+ uint64 duration = 7;
+ // The host that recorded this span, primarily for query by service name.
+ //
+ // Instrumentation should always record this. Usually, absent implies late
+ // data. The IP address corresponding to this is usually the site local or
+ // advertised service address. When present, the port indicates the listen
+ // port.
+ Endpoint local_endpoint = 8;
+ // When an RPC (or messaging) span, indicates the other side of the
+ // connection.
+ //
+ // By recording the remote endpoint, your trace will contain network context
+ // even if the peer is not tracing. For example, you can record the IP from
+ // the "X-Forwarded-For" header or the service name and socket of a remote
+ // peer.
+ Endpoint remote_endpoint = 9;
+ // Associates events that explain latency with the time they happened.
+ repeated Annotation annotations = 10;
+ // Tags give your span context for search, viewing and analysis.
+ //
+ // For example, a key "your_app.version" would let you lookup traces by
+ // version. A tag "sql.query" isn't searchable, but it can help in debugging
+ // when viewing a trace.
+ map<string, string> tags = 11;
+ // True is a request to store this span even if it overrides sampling policy.
+ //
+ // This is true when the "X-B3-Flags" header has a value of 1.
+ bool debug = 12;
+ // True if we are contributing to a span started by another tracer (ex on a
+ // different host).
+ bool shared = 13;
+}
+
+// The network context of a node in the service graph.
+//
+// The next id is 5.
+message Endpoint {
+ // Lower-case label of this node in the service graph, such as "favstar".
+ // Leave absent if unknown.
+ //
+ // This is a primary label for trace lookup and aggregation, so it should be
+ // intuitive and consistent. Many use a name from service discovery.
+ string service_name = 1;
+ // 4 byte representation of the primary IPv4 address associated with this
+ // connection. Absent if unknown.
+ bytes ipv4 = 2;
+ // 16 byte representation of the primary IPv6 address associated with this
+ // connection. Absent if unknown.
+ //
+ // Prefer using the ipv4 field for mapped addresses.
+ bytes ipv6 = 3;
+ // Depending on context, this could be a listen port or the client-side of a
+ // socket. Absent if unknown.
+ int32 port = 4;
+}
+
+// Associates an event that explains latency with a timestamp.
+// Unlike log statements, annotations are often codes. Ex. "ws" for WireSend
+//
+// The next id is 3.
+message Annotation {
+ // Epoch microseconds of this event.
+ //
+ // For example, 1502787600000000 corresponds to 2017-08-15 09:00 UTC
+ //
+ // This value should be set directly by instrumentation, using the most
+ // precise value possible. For example, gettimeofday or multiplying epoch
+ // millis by 1000.
+ fixed64 timestamp = 1;
+ // Usually a short tag indicating an event, like "error"
+ //
+ // While possible to add larger data, such as garbage collection details, low
+ // cardinality event names both keep the size of spans down and also are easy
+ // to search against.
+ string value = 2;
+}
+
+// A list of spans with possibly different trace ids, in no particular order.
+//
+// This is used for all transports: POST, Kafka messages etc. No other fields
+// are expected, This message facilitates the mechanics of encoding a list, as
+// a field number is required. The name of this type is the same in the OpenApi
+// aka Swagger specification. https://zipkin.io/zipkin-api/#/default/post_spans
+message ListOfSpans {
+ repeated Span spans = 1;
+}
+
+// Response for SpanService/Report RPC. This response currently does not return
+// any information beyond indicating that the request has finished. That said,
+// it may be extended in the future.
+message ReportResponse {
+}
+
+// SpanService allows reporting spans using gRPC, as opposed to HTTP POST
+// reporting. Implementations are asynchronous and may drop spans for reasons
+// of sampling or storage availability. While this is primarily used to store
+// spans, other operations may take place such as aggregation of service
+// dependencies or data cleaning.
+service SpanService {
+
+ // Report the provided spans to the collector. Analogous to the HTTP POST
+ // /api/v2/spans endpoint. Spans are not required to be complete or belonging
+ // to the same trace.
+ rpc Report(ListOfSpans) returns (ReportResponse) {}
+}
diff --git a/zipkin-api/zipkin2-api.yaml b/zipkin-api/zipkin2-api.yaml
new file mode 100644
index 0000000..9d25da7
--- /dev/null
+++ b/zipkin-api/zipkin2-api.yaml
@@ -0,0 +1,521 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+swagger: "2.0"
+info:
+ version: "1.0.0"
+ title: Zipkin API
+ description: |
+ Zipkin's v2 api currently includes a POST endpoint that can receive spans.
+host: localhost:9411
+basePath: /api/v2
+schemes:
+ - http
+ - https
+consumes:
+ - application/json
+paths:
+ /services:
+ get:
+ description: |
+ Returns a list of all service names associated with span endpoints.
+ responses:
+ '200':
+ description: Succes
+ schema:
+ type: array
+ items:
+ type: string
+ '400':
+ description: Bad Request Error
+ /spans:
+ get:
+ description: Get all the span names recorded by a particular service
+ parameters:
+ - name: serviceName
+ in: query
+ required: true
+ description: |
+ Ex favstar (required) - Lower-case label of a node in the service
+ graph. The /services endpoint enumerates possible input values.
+ type: string
+ responses:
+ '200':
+ description: OK
+ schema:
+ type: array
+ items:
+ type: string
+ '400':
+ description: Bad Request Error
+ post:
+ description: |
+ Uploads a list of spans encoded per content-type, for example json.
+ consumes:
+ - application/json
+ - application/x-protobuf
+ produces: []
+ parameters:
+ - name: spans
+ in: body
+ description: A list of spans that belong to any trace.
+ required: true
+ schema:
+ $ref: "#/definitions/ListOfSpans"
+ responses:
+ '202':
+ description: Accepted
+ /traces:
+ get:
+ description: |
+ Invoking this request retrieves traces matching the below filters.
+
+ Results should be filtered against endTs, subject to limit and
+ lookback. For example, if endTs is 10:20 today, limit is 10, and
+ lookback is 7 days, traces returned should be those nearest to 10:20
+ today, not 10:20 a week ago.
+
+ Time units of endTs and lookback are milliseconds as opposed to
+ microseconds, the grain of Span.timestamp. Milliseconds is a more
+ familiar and supported granularity for query, index and windowing
+ functions
+ parameters:
+ - name: serviceName
+ in: query
+ required: false
+ description: |
+ Ex favstar (required) - Lower-case label of a node in the service
+ graph. The /services endpoint enumerates possible input values.
+ type: string
+ - name: spanName
+ in: query
+ required: false
+ description: |
+ Ex get - name of a span in a trace.
+ Only return traces that contains spans with this name.
+ type: string
+ - name: annotationQuery
+ in: query
+ type: string
+ required: false
+ description: |
+ Ex. `http.uri=/foo and retried` - If key/value (has an `=`),
+ constrains against Span.tags entres. If just a word, constrains
+ against Span.annotations[].value or Span.tags[].key. Any values are
+ AND against eachother. This means a span in the trace must match
+ all of these.
+ - name: minDuration
+ in: query
+ type: integer
+ description: |
+ Ex. 100000 (for 100ms). Only return traces whose `Span.duration` is
+ greater than or equal to minDuration microseconds.
+ - name: maxDuration
+ in: query
+ type: integer
+ description: |
+ Only return traces whose Span.duration is less than or equal to
+ `maxDuration` microseconds. Only valid with minDuration.
+ - name: endTs
+ in: query
+ type: integer
+ format: int64
+ description: |
+ Only return traces where all Span.timestamp are at or before this
+ time in epoch milliseconds. Defaults to current time.
+ - name: lookback
+ type: integer
+ format: int64
+ in: query
+ description: |
+ Only return traces where all Span.timestamp are at or after (endTs
+ - * lookback) in milliseconds. Defaults to endTs, limited to a
+ system parameter QUERY_LOOKBACK
+ - name: limit
+ in: query
+ default: 10
+ type: integer
+ description: |
+ Maximum number of traces to return. Defaults to 10
+ responses:
+ '200':
+ description: OK
+ schema:
+ $ref: "#/definitions/ListOfTraces"
+ /trace/{traceId}:
+ get:
+ parameters:
+ - name: traceId
+ in: path
+ required: true
+ type: string
+ maxLength: 32
+ minLength: 16
+ pattern: "[a-z0-9]{16,32}"
+ description: |
+ Trace identifier, set on all spans within it.
+
+ Encoded as 16 or 32 lowercase hex characters corresponding to 64 or 128 bits.
+ For example, a 128bit trace ID looks like 4e441824ec2b6a44ffdc9bb9a6453df3
+ responses:
+ '200':
+ description: OK
+ schema:
+ $ref: "#/definitions/Trace"
+ '404':
+ description: "`traceId` not found"
+ /dependencies:
+ get:
+ description: |
+ Returns service links derived from spans.
+ parameters:
+ - name: endTs
+ in: query
+ description: |
+ only return links from spans where `Span.timestamp` are at or before
+ this time in epoch milliseconds.
+ required: true
+ type: integer
+ format: int64
+ - name: lookback
+ in: query
+ description: |
+ only return links where all Span.timestamp are at or after
+ (`endTs - * lookback`) in milliseconds. Defaults to `endTs`, limited
+ to a system parameter `QUERY_LOOKBACK`
+ type: integer
+ format: int64
+ responses:
+ '200':
+ description: OK
+ schema:
+ type: array
+ title: ListOfDependencyLinks
+ items:
+ $ref: "#/definitions/DependencyLink"
+ /autocompleteKeys:
+ get:
+ description: |
+ Returns a subset of keys from Span.tags configured for value autocompletion.
+ This helps sites populate common keys into the annotationQuery parameter of the
+ /traces endpoint. For example, a UI can allow users to select site-specific
+ keys from a drop-down as opposed to typing them in manually. This helps guide
+ users towards the more correct keys and avoids typos or formatting problems.
+ responses:
+ '200':
+ description: Success is a list of site-specific keys, such as environment.
+ schema:
+ type: array
+ items:
+ type: string
+ '400':
+ description: Bad Request Error
+ /autocompleteValues:
+ get:
+ description: |
+ Returns all known values of Span.tags for the given autocomplete key. Refer
+ to the description of /autocompleteKeys for the use case.
+ parameters:
+ - name: key
+ in: query
+ required: true
+ description: Name of the autocomplete key from the /autocompleteKeys endpoint.
+ type: string
+ responses:
+ '200':
+ description: |
+ Success result is empty when there are no values or the key was not
+ configured.
+ schema:
+ type: array
+ items:
+ type: string
+ '400':
+ description: Bad Request Error
+
+definitions:
+ Endpoint:
+ type: object
+ title: Endpoint
+ description: The network context of a node in the service graph
+ properties:
+ serviceName:
+ type: string
+ description: |
+ Lower-case label of this node in the service graph, such as "favstar". Leave
+ absent if unknown.
+
+ This is a primary label for trace lookup and aggregation, so it should be
+ intuitive and consistent. Many use a name from service discovery.
+ ipv4:
+ type: string
+ format: ipv4
+ description: |
+ The text representation of the primary IPv4 address associated with this
+ connection. Ex. 192.168.99.100 Absent if unknown.
+ ipv6:
+ type: string
+ format: ipv6
+ description: |
+ The text representation of the primary IPv6 address associated with a
+ connection. Ex. 2001:db8::c001 Absent if unknown.
+
+ Prefer using the ipv4 field for mapped addresses.
+ port:
+ type: integer
+ description: |
+ Depending on context, this could be a listen port or the client-side of a
+ socket. Absent if unknown. Please don't set to zero.
+ Annotation:
+ title: Annotation
+ type: object
+ description: |
+ Associates an event that explains latency with a timestamp.
+ Unlike log statements, annotations are often codes. Ex. "ws" for WireSend
+
+ Zipkin v1 core annotations such as "cs" and "sr" have been replaced with
+ Span.Kind, which interprets timestamp and duration.
+ required:
+ - timestamp
+ - value
+ properties:
+ timestamp:
+ type: integer
+ description: |
+ Epoch **microseconds** of this event.
+
+ For example, 1502787600000000 corresponds to 2017-08-15 09:00 UTC
+
+ This value should be set directly by instrumentation, using the most precise
+ value possible. For example, gettimeofday or multiplying epoch millis by 1000.
+ value:
+ type: string
+ description: |
+ Usually a short tag indicating an event, like "error"
+
+ While possible to add larger data, such as garbage collection details, low
+ cardinality event names both keep the size of spans down and also are easy
+ to search against.
+ Tags:
+ type: object
+ title: Tags
+ description: |
+ Adds context to a span, for search, viewing and analysis.
+
+ For example, a key "your_app.version" would let you lookup traces by version.
+ A tag "sql.query" isn't searchable, but it can help in debugging when viewing
+ a trace.
+ additionalProperties:
+ type: string
+ ListOfSpans:
+ title: ListOfSpans
+ description: 'A list of spans with possibly different trace ids, in no particular order'
+ type: array
+ items:
+ $ref: "#/definitions/Span"
+ Trace:
+ title: Trace
+ type: array
+ description: 'List of spans who have the same trace ID.'
+ items:
+ $ref: "#/definitions/Span"
+ ListOfTraces:
+ title: ListOfTraces
+ type: array
+ items:
+ $ref: "#/definitions/Trace"
+ Span:
+ title: Span
+ description: |
+ A span is a single-host view of an operation. A trace is a series of spans
+ (often RPC calls) which nest to form a latency tree. Spans are in the same
+ trace when they share the same trace ID. The parent_id field establishes the
+ position of one span in the tree.
+
+ The root span is where parent_id is Absent and usually has the longest
+ duration in the trace. However, nested asynchronous work can materialize as
+ child spans whose duration exceed the root span.
+
+ Spans usually represent remote activity such as RPC calls, or messaging
+ producers and consumers. However, they can also represent in-process
+ activity in any position of the trace. For example, a root span could
+ represent a server receiving an initial client request. A root span could
+ also represent a scheduled job that has no remote context.
+ type: object
+ required:
+ - traceId
+ - id
+ properties:
+ traceId:
+ type: string
+ maxLength: 32
+ minLength: 16
+ pattern: "[a-z0-9]{16,32}"
+ description: |
+ Randomly generated, unique identifier for a trace, set on all spans within it.
+
+ Encoded as 16 or 32 lowercase hex characters corresponding to 64 or 128 bits.
+ For example, a 128bit trace ID looks like 4e441824ec2b6a44ffdc9bb9a6453df3
+ name:
+ type: string
+ description: |
+ The logical operation this span represents in lowercase (e.g. rpc method).
+ Leave absent if unknown.
+
+ As these are lookup labels, take care to ensure names are low cardinality.
+ For example, do not embed variables into the name.
+ parentId:
+ type: string
+ pattern: "[a-z0-9]{16}"
+ maxLength: 16
+ minLength: 16
+ description: 'The parent span ID or absent if this the root span in a trace.'
+ id:
+ type: string
+ pattern: "[a-z0-9]{16}"
+ maxLength: 16
+ minLength: 16
+ description: |
+ Unique 64bit identifier for this operation within the trace.
+
+ Encoded as 16 lowercase hex characters. For example ffdc9bb9a6453df3
+ kind:
+ type: string
+ enum:
+ - CLIENT
+ - SERVER
+ - PRODUCER
+ - CONSUMER
+ description: |
+ When present, kind clarifies timestamp, duration and remoteEndpoint. When
+ absent, the span is local or incomplete. Unlike client and server, there
+ is no direct critical path latency relationship between producer and
+ consumer spans.
+
+ * `CLIENT`
+ * timestamp is the moment a request was sent to the server. (in v1 "cs")
+ * duration is the delay until a response or an error was received. (in v1 "cr"-"cs")
+ * remoteEndpoint is the server. (in v1 "sa")
+ * `SERVER`
+ * timestamp is the moment a client request was received. (in v1 "sr")
+ * duration is the delay until a response was sent or an error. (in v1 "ss"-"sr")
+ * remote_endpoint is the client. (in v1 "ca")
+ * `PRODUCER`
+ * timestamp is the moment a message was sent to a destination. (in v1 "ms")
+ * duration is the delay sending the message, such as batching.
+ * remoteEndpoint is the broker.
+ * `CONSUMER`
+ * timestamp is the moment a message was received from an origin. (in v1 "mr")
+ * duration is the delay consuming the message, such as from backlog.
+ * remoteEndpoint - Represents the broker. Leave serviceName absent if unknown.
+ timestamp:
+ type: integer
+ format: int64
+ description: |
+ Epoch microseconds of the start of this span, possibly absent if
+ incomplete.
+
+ For example, 1502787600000000 corresponds to 2017-08-15 09:00 UTC
+
+ This value should be set directly by instrumentation, using the most
+ precise value possible. For example, gettimeofday or multiplying epoch
+ millis by 1000.
+
+ There are three known edge-cases where this could be reported absent.
+ * A span was allocated but never started (ex not yet received a timestamp)
+ * The span's start event was lost
+ * Data about a completed span (ex tags) were sent after the fact
+ duration:
+ type: integer
+ format: int64
+ minimum: 1
+ description: |
+ Duration in **microseconds** of the critical path, if known. Durations of less
+ than one are rounded up. Duration of children can be longer than their
+ parents due to asynchronous operations.
+
+ For example 150 milliseconds is 150000 microseconds.
+ debug:
+ type: boolean
+ description: |
+ True is a request to store this span even if it overrides sampling policy.
+
+ This is true when the `X-B3-Flags` header has a value of 1.
+ shared:
+ type: boolean
+ description: 'True if we are contributing to a span started by another tracer (ex on a different host).'
+ localEndpoint:
+ $ref: "#/definitions/Endpoint"
+ description: |
+ The host that recorded this span, primarily for query by service name.
+
+ Instrumentation should always record this. Usually, absent implies late
+ data. The IP address corresponding to this is usually the site local or
+ advertised service address. When present, the port indicates the listen
+ port.
+ remoteEndpoint:
+ $ref: "#/definitions/Endpoint"
+ description: |
+ When an RPC (or messaging) span, indicates the other side of the
+ connection.
+
+ By recording the remote endpoint, your trace will contain network context
+ even if the peer is not tracing. For example, you can record the IP from
+ the `X-Forwarded-For` header or the service name and socket of a remote
+ peer.
+ annotations:
+ type: array
+ uniqueItems: true
+ items:
+ $ref: '#/definitions/Annotation'
+ description: 'Associates events that explain latency with the time they happened.'
+ tags:
+ $ref: '#/definitions/Tags'
+ description: 'Tags give your span context for search, viewing and analysis.'
+ DependencyLink:
+ title: DependencyLink
+ description: |
+ The count of traced calls between services, or between a service and a broker.
+
+ The direction of the link is parent to child, and can be one of:
+ * client to server
+ * producer to broker
+ * broker to consumer
+
+ Note: This is related to span ID count between a sender and receiver, but there
+ is nuance that makes it more difficult than counting unique span IDs. Ex. the
+ parent or child might be uninstrumented: detected via the remote endpoint. There
+ can also be scenarios where both sides are instrumented. Please use existing tools
+ such as zipkin-dependencies to derive links as they avoid under or over counting.
+ type: object
+ required:
+ - parent
+ - child
+ - callCount
+ properties:
+ parent:
+ type: string
+ description: 'The service name of the caller: client or message producer or broker.'
+ child:
+ type: string
+ description: 'The service name of the callee: server or message consumer or broker.'
+ callCount:
+ type: integer
+ description: 'Total traced calls made from the parent to the child.'
+ errorCount:
+ type: integer
+ description: 'Total traced calls made from the parent to the child known to be in error.'
[incubator-zipkin-website] 02/02: Automatic site generation from
815638a
Posted by ab...@apache.org.
This is an automated email from the ASF dual-hosted git repository.
abesto pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/incubator-zipkin-website.git
commit 0b16db228338d17e46f73d82b70beafe7e0440d9
Author: jenkins <bu...@apache.org>
AuthorDate: Fri May 17 10:05:44 2019 +0000
Automatic site generation from 815638a
---
Jenkinsfile | 12 +--
zipkin-api/DISCLAIMER | 5 ++
zipkin-api/Jenkinsfile | 78 +++++++++++++++++++
zipkin-api/LICENSE | 201 +++++++++++++++++++++++++++++++++++++++++++++++++
zipkin-api/NOTICE | 5 ++
5 files changed, 296 insertions(+), 5 deletions(-)
diff --git a/Jenkinsfile b/Jenkinsfile
index 9b49bb9..e4b024a 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -37,7 +37,7 @@ pipeline {
steps {
sh 'env'
sh 'pwd'
- sh 'ls'
+ sh 'ls -lR'
sh 'alias'
sh 'git config --list --local'
sh 'git config --list --global'
@@ -80,9 +80,9 @@ pipeline {
}
stage('Publish') {
- when {
- branch 'master'
- }
+// when {
+// branch 'master'
+// }
environment {
// GH Personal access token @abesto
GITUSER = credentials('2d27b827-20c2-4173-ac84-f3abc308fc88')
@@ -96,13 +96,15 @@ pipeline {
builddir="$(mktemp -d)"
mv _site "${builddir}/"
- ls -lR "${builddir}/_site/"
+ ls "${builddir}/_site/"
git fetch origin asf-site:asf-site
git reset --hard
git checkout asf-site
git log -3
git status
+ git add ./zipkin-api/*.yaml ./zipkin-api/*.proto
+ git commit -m "force adds zipkin-api" || true
rsync -avrh --delete --exclude=".git" "${builddir}/_site/" ./
git status
diff --git a/zipkin-api/DISCLAIMER b/zipkin-api/DISCLAIMER
new file mode 100644
index 0000000..f73ab06
--- /dev/null
+++ b/zipkin-api/DISCLAIMER
@@ -0,0 +1,5 @@
+Apache Zipkin (incubating) is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator PMC.
+Incubation is required of all newly accepted projects until a further review indicates
+that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects.
+While incubation status is not necessarily a reflection of the completeness or stability of the code,
+it does indicate that the project has yet to be fully endorsed by the ASF.
diff --git a/zipkin-api/Jenkinsfile b/zipkin-api/Jenkinsfile
new file mode 100644
index 0000000..9a05384
--- /dev/null
+++ b/zipkin-api/Jenkinsfile
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+pipeline {
+ agent {
+ label 'ubuntu'
+ }
+
+ tools {
+ jdk 'JDK 1.8 (latest)'
+ }
+
+ options {
+ buildDiscarder(logRotator(
+ numToKeepStr: '30',
+ ))
+ timestamps()
+ skipStagesAfterUnstable()
+ timeout time: 30, unit: 'MINUTES'
+ }
+
+ stages {
+ stage('SCM Checkout') {
+ steps {
+ deleteDir()
+ checkout scm
+ }
+ }
+
+ stage('Check environment') {
+ steps {
+ sh 'env'
+ sh 'pwd'
+ sh 'ls'
+ sh 'git status'
+ }
+ }
+
+ stage('Publish snapshot') {
+ when {
+ branch 'master'
+ }
+ steps {
+ sh './mvnw deploy -Papache-release -Dgpg.skip=true -DskipTests --batch-mode -nsu'
+ }
+ }
+ }
+
+ post {
+ changed {
+ script {
+ if (env.BRANCH_NAME == 'master') {
+ emailext(
+ subject: "[${currentBuild.projectName}] master is ${currentBuild.currentResult} (#${currentBuild.number})",
+ to: 'commits@zipkin.apache.org',
+ replyTo: 'dev@zipkin.apache.org',
+ body: "See <${currentBuild.absoluteUrl}>"
+ )
+ }
+ }
+
+ }
+ }
+}
diff --git a/zipkin-api/LICENSE b/zipkin-api/LICENSE
new file mode 100644
index 0000000..8dada3e
--- /dev/null
+++ b/zipkin-api/LICENSE
@@ -0,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
+
+ "Licensor" shall mean the copyright owner or entity authorized by
+ the copyright owner that is granting the License.
+
+ "Legal Entity" shall mean the union of the acting entity and all
+ other entities that control, are controlled by, or are under common
+ control with that entity. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
+ include a readable copy of the attribution notices contained
+ within such NOTICE file, excluding those notices that do not
+ pertain to any part of the Derivative Works, in at least one
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diff --git a/zipkin-api/NOTICE b/zipkin-api/NOTICE
new file mode 100644
index 0000000..d2f1493
--- /dev/null
+++ b/zipkin-api/NOTICE
@@ -0,0 +1,5 @@
+Language independent interchange formats for Apache Zipkin (incubating)
+Copyright 2019 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).