背景

Jenkins 作为项目构建,持续部署必不可少的工具,如何使用程序或者脚本来控制构建流程成为本文研究的内容.

默认情况下,安装好Jenkins后,/api路径下面有一些基本 api 的介绍,可供参考,但是不是很直观,没有罗列出 api 接口.

本文使用的 jenkins-java 客户端是:

<dependency>
	<groupId>com.offbytwo.jenkins</groupId>
	<artifactId>jenkins-client</artifactId>
	<version>0.3.7</version>
</dependency>

假设 jenkins 部署地址为: http://localhost:8080

本文用到的 api:

名称	API
创建 Job	`POST http://localhost:8080/createItem/api/json?name=xxx`
更新 Job	`POST http://localhost:8080/job/{job_name}/config.xml/api/json`
获取 Job	`GET http://localhost:8080/job/{job_name}/api/json`
获取 JobXml	`GET http://localhost:8080/job/{job_name}/config.xml/api/json`
创建 Build	`POST http://localhost:8080/job/{job_name}/build/api/json`
获取 QueueItem	`GET http://localhost:8080/queue/item/17/api/json`
获取 Build信息	`GET http://localhost:8080/job/test/6/api/json`
获取TXT日志	`GET http://localhost:8080/job/test/{build_number}/logText/progressiveText/api/json`
获取 Html 日志	`GET http://localhost:8080/job/test/{build_number}/logText/progressiveHtml/api/json`

创建 Job API

jenkins 的配置都是靠 xml 的格式落地的,所以配置其实都是 xml 的形式.

POST http://localhost:8080/createItem/api/json?name=xxx

将创建需要的 config.xml也用请求传入到服务端,既可以创建成功.

如何知道 config.xml应该如何编写呢?

可以在 jenkins 收工创建一个需要的项目,然后编辑完成后,到 jenkins 工作目录下找到 jobs/{job_name}/config.xml 用他作为模板来书写你需要的模板.
通过获取 xml 的 api 来获取

GET http://localhost:8080/job/{job_name}/config.xml/api/json

Java Client

jenkinsServer.createJob("auto_test_job", replacedText, true);
String xml = jenkinsServer.getJobXml("auto_test_job");

修改 Job API

修改 job 也是修改xml.

POST http://localhost:8080/job/{job_name}/config.xml/api/json

config.xml的内容传入到 body 中,contentType 设置为text/xml

Java Client

 jenkinsServer.updateJob("auto_test_job", replacedText, true);

构建 Build API

根据 job 名称获取 Job

GET http://localhost:8080/job/{job_name}/api/json

新的构建

POST http://localhost:8080/job/{job_name}/build/api/json

提交到服务器成功后返回一个类似于队列ID的东西,因为是异步构建,那么要获取构建的状态,就需要,用这个队列 id去进一步的获取. 例如:

 $ curl -v  -XPOST http://localhost:8080/job/test/build/api/json
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
> POST /job/test/build/api/json HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 201 Created
< Date: Sat, 05 Jan 2019 08:33:45 GMT
< X-Content-Type-Options: nosniff
< Location: http://localhost:8080/queue/item/17/
< Content-Length: 0
< Server: Jetty(9.4.z-SNAPSHOT)
<
* Connection #0 to host localhost left intact

上面的Location: http://localhost:8080/queue/item/17/就是返回的队列信息,下面的 queueItem 获取就是依赖这个.

根据 QueueId 获取 QueueItem

GET http://localhost:8080/queue/item/17/api/json

举例

$ curl  http://localhost:8080/queue/item/17/api/json\?pretty\=true
{
  "_class" : "hudson.model.Queue$LeftItem",
  "actions" : [
    {
      "_class" : "hudson.model.CauseAction",
      "causes" : [
        {
          "_class" : "hudson.model.Cause$UserIdCause",
          "shortDescription" : "由用户 anonymous 启动",
          "userId" : null,
          "userName" : "anonymous"
        }
      ]
    }
  ],
  "blocked" : false,
  "buildable" : false,
  "id" : 17,
  "inQueueSince" : 1546677225670,
  "params" : "",
  "stuck" : false,
  "task" : {
    "_class" : "hudson.maven.MavenModuleSet",
    "name" : "test",
    "url" : "http://localhost:8080/job/test/",
    "color" : "blue"
  },
  "url" : "queue/item/17/",
  "why" : null,
  "cancelled" : false,
  "executable" : {
    "_class" : "hudson.maven.MavenModuleSetBuild",
    "number" : 6,
    "url" : "http://localhost:8080/job/test/6/"
  }
}

获取到的 QueueItem 上面就知道这个 item 有没有被 build 执行,比较关键的参数就是executable,如果executable不为空,就说明 jenkins 已经在对这个任务进行 build 的了,build 的编号就是number,也就是我们在 jenkins 页面上看到的编号.你可以通过url字段的值在浏览器打开.

获取 Build 详情

既然开始了 build,我们就可以获取 build 的详细信息.

curl http://localhost:8080/job/test/6/api/json\?pretty\=true
{
  ...
  "building" : false,
  "description" : null,
  "displayName" : "#6",
  "duration" : 13631,
  "estimatedDuration" : 17999,
  "executor" : null,
  "fullDisplayName" : "test #6",
  "id" : "6",
  "keepLog" : false,
  "number" : 6,
  "queueId" : 17,
  "result" : "SUCCESS",
  "timestamp" : 1546677234794,
  "url" : "http://localhost:8080/job/test/6/",
  "builtOn" : "",
 ...
}

从返回结果可以看到是否还在 build:"building" : false,,如果 build 结束状态就在:"result" : "SUCCESS",

获取Build日志

文本:

GET http://localhost:8080/job/test/{build_number}/logText/progressiveText/api/json

html

GET http://localhost:8080/job/test/{build_number}/logText/progressiveHtml/api/json

Java Client


JobWithDetails job = jenkinsServer.getJob(jenkinsJob);
...
 QueueReference reference = job.build( true);
...
QueueItem queueItem = jenkinsServer.getQueueItem(new QueueReference(queuePart));
...
Build build = jenkinsServer.getBuild(queueItem);
...
BuildWithDetails details = build.details();
BuildResult result = details.getResult();
...
String logs =  details.getConsoleOutputText();