Jenkins Docker靜態(tài)agent節(jié)點的構(gòu)建過程
靜態(tài)節(jié)點就是固定的在一臺機器上面，通過一些固定的命令將其啟動起來，動態(tài)節(jié)點就是來了多個任務(wù)，可以幫你創(chuàng)建多個agent去跑。而不像靜態(tài)節(jié)點來了多個任務(wù)，那么就會等待這個任務(wù)隊列，然后進行這個構(gòu)建。這就是靜態(tài)和動態(tài)的區(qū)別。
靜態(tài)節(jié)點就是通過java -jar這條命令去啟動起來就可以了。
1. 靜態(tài)節(jié)點實踐
首先，在Jenkins 中創(chuàng)建一個jnlp類型的agent， 拿到連接所需要的認證和秘鑰信息。
jar -jar這條命令后面有很多的參數(shù)，不管是配置動態(tài)節(jié)點還是靜態(tài)節(jié)點，這些參數(shù)都會用到。
java -jar agent.jar -jnlpUrl http://192.168.1.200:8080/computer/buildtest01/jenkins-agent.jnlp -secret 047a2627be5ee128c1a93f281051acc7bbbbd5221dcb56ae9fa408a494e72c2f -workDir "/home/jenkins"
1.1 Docker靜態(tài)節(jié)點
啟動鏡像，傳遞認證參數(shù)。(使用docker的話其實就是使用一個鏡像，鏡像里面運行了一個agent，然后將這些參數(shù)傳遞進去)
在虛擬機上面下載agent.jar包然后手動執(zhí)行這些命令就可以了
在命令行中啟動節(jié)點 java -jar agent.jar -jnlpUrl http://139.198.166.235:8080/computer/build%2D02/jenkins-agent.jnlp -secret 942d7e769a43f65388751ee954af20e90fa0c5f8bdb19e0584db4cc61adab8ba -workDir "/var/jenkins" Run from agent command line, with the secret stored in a file: echo 942d7e769a43f65388751ee954af20e90fa0c5f8bdb19e0584db4cc61adab8ba > secret-file java -jar agent.jar -jnlpUrl http://139.198.166.235:8080/computer/build%2D02/jenkins-agent.jnlp -secret @secret-file -workDir "/var/jenkins"
如果是在docker里面就需要找一個agent鏡像：inbound-agent鏡像 : Docker Hub
## 測試
[root@jenkins-agent ~]# docker run --init jenkins/inbound-agent -url http://139.198.166.235:8080 -workDir=/home/jenkins 942d7e769a43f65388751ee954af20e90fa0c5f8bdb19e0584db4cc61adab8ba build-02 Oct 28, 2021 2:19:25 AM hudson.remoting.jnlp.Main createEngine INFO: Setting up agent: build-02 Oct 28, 2021 2:19:25 AM hudson.remoting.jnlp.Main$CuiListener <init> INFO: Jenkins agent is running in headless mode. Oct 28, 2021 2:19:25 AM hudson.remoting.Engine startEngine INFO: Using Remoting version: 4.11 Oct 28, 2021 2:19:25 AM org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir INFO: Using /home/jenkins/remoting as a remoting work directory Oct 28, 2021 2:19:25 AM org.jenkinsci.remoting.engine.WorkDirManager setupLogging INFO: Both error and output logs will be printed to /home/jenkins/remoting Oct 28, 2021 2:19:25 AM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [http://139.198.166.235:8080/] Oct 28, 2021 2:19:25 AM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping] Oct 28, 2021 2:19:25 AM hudson.remoting.jnlp.Main$CuiListener status INFO: Agent discovery successful Agent address: 139.198.166.235 Agent port: 50000 Identity: 67:e8:d2:73:d1:cf:01:f6:6c:a4:cb:b3:0f:25:8c:3d Oct 28, 2021 2:19:25 AM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking Oct 28, 2021 2:19:25 AM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to 139.198.166.235:50000 Oct 28, 2021 2:19:25 AM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP4-connect Oct 28, 2021 2:19:25 AM org.jenkinsci.remoting.protocol.impl.BIONetworkLayer$Reader run INFO: Waiting for ProtocolStack to start. Oct 28, 2021 2:19:26 AM hudson.remoting.jnlp.Main$CuiListener status INFO: Remote identity confirmed: 67:e8:d2:73:d1:cf:01:f6:6c:a4:cb:b3:0f:25:8c:3d Oct 28, 2021 2:19:26 AM hudson.remoting.jnlp.Main$CuiListener status INFO: Connected
## 運行
[root@jenkins-agent ~]# docker run -itd --name build-02 jenkins/inbound-agent -url http://139.198.166.235:8080 -workDir=/home/jenkins 942d7e769a43f65388751ee954af20e90fa0c5f8bdb19e0584db4cc61adab8ba build-02 bd2500223dabb45ff41c234a8871651f93b38264458c4d2bed40f821577b8944 [root@jenkins-agent ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES bd2500223dab jenkins/inbound-agent "/usr/local/bin/jenk?? 18 seconds ago Up 18 seconds build-02
這里需要注意，docker的靜態(tài)agent里面什么都沒有，比如構(gòu)建工具是沒有的
[root@jenkins-agent ~]# docker exec -it build-02 bash jenkins@bd2500223dab:~$ mvn bash: mvn: command not found
所以解決辦法是將agent鏡像作為基礎(chǔ)鏡像，將構(gòu)建工具打進去，那么你就可以使用了，或者將工具掛載進去。
docker run -itd --name build-02 \ -v /usr/local/apache-maven-3.8.1:/home/jenkins/apache-maven-3.8.1 \ jenkins/inbound-agent -url http://139.198.166.235:8080 -workDir=/home/jenkins 942d7e769a43f65388751ee954af20e90fa0c5f8bdb19e0584db4cc61adab8ba build-02 jenkins@2a682b01263b:~$ /home/jenkins/apache-maven-3.8.1/bin/mvn -v Apache Maven 3.8.1 (05c21c65bdfed0f71a2f2ada8b84da59348c4c5d) Maven home: /home/jenkins/apache-maven-3.8.1 Java version: 11.0.12, vendor: Eclipse Foundation, runtime: /opt/java/openjdk Default locale: en, platform encoding: UTF-8 OS name: "linux", version: "3.10.0-693.el7.x86_64", arch: "amd64", family: "unix"
同理使用docker命令也一樣掛載進去。
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