|NO.Z.00041|——————————|CloudNative|——|CI/CD&Jenkins_pipeline操作.V15|——|Jenkins_pipeline自动化部署Java项目|

一、Jenkins pipeline自动化发布Java项目

### --- 环境准备

~~~     ——>**插件**：Maven Integration plugin
~~~     ——>**环境：**maven、tomcat，git

### --- 用的博客系统代码：

git clone https://github.com/b3log/solo.git

### --- 远端git服务器：

[root@qfedu.com ~]# mkdir -p solo
[root@qfedu.com ~]# cd solo/
[root@qfedu.com ~]# git --bare init
Initialized empty Git repository in /home/git/repos/solo/

### --- 本地web：

[root@qfedu.com ~]# git remote -v
origin    git@172.16.1.3:/home/git/repos/solo (fetch)
origin    git@172.16.1.3:/home/git/repos/solo (push)

[root@qfedu.com ~]# git remote rm origin
[root@qfedu.com ~]# git init
Reinitialized existing Git repository in /root/solo/.git/
[root@qfedu.com ~]# git remote add origin git@172.16.1.3:/home/git/repos/solo
[root@qfedu.com ~]# git add .
[root@qfedu.com ~]# git commit -m "java solo all"
# On branch master
nothing to commit, working directory clean

[root@qfedu.com ~]# git push origin master
Counting objects: 29058, done.
Compressing objects: 100% (9854/9854), done.
Writing objects: 100% (29058/29058), 47.77 MiB | 39.28 MiB/s, done.
Total 29058 (delta 15768), reused 29058 (delta 15768)
To git@172.16.1.3:/home/git/repos/solo
 * [new branch]      master -> master

### --- 因为solo需要改如下配置才可以访问：（改serverhost为指定的域名）
~~~     ——>然后再重新提交上去

[root@qfedu.com ~]# vim /root/solo/src/main/resources/latke.properties

二、**部署节点：

### --- **部署节点：** node 节点需要在系统管理中配置节点

~~~     新建job
~~~     参数化构建
~~~     配置git仓库（针对jenkinsfile）

三、编写Jenkinsfile

### --- 源码配置文件：

node ("slave02-172.16.1.3") {
   # def mvnHome = '/usr/local/maven'
   stage('git checkout') {
        checkout([$class: 'GitSCM', branches: [[name: '${branch}']], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[url: 'git@172.16.1.3:/home/git/repos/solo']]])
   }
   stage('maven build') {
        sh '''export JAVA_HOME=/usr/local/java
        /usr/local/maven/bin/mvn clean package -Dmaven.test.skip=true'''
   }
   stage('deploy') {
        sh '''
    JENKINS_NODE_COOKIE=dontkillme
    export JAVA_HOME=/usr/local/java
        TOMCAT_NAME=tomcat
        TOMCAT_HOME=/usr/local/$TOMCAT_NAME
        WWWROOT=$TOMCAT_HOME/webapps/ROOT

        if [ -d $WWWROOT ]; then
           mv $WWWROOT /data/backup/${TOMCAT_NAME}-$(date +"%F_%T")
        fi
        unzip ${WORKSPACE}/target/*.war -d $WWWROOT
        PID=$(ps -ef |grep $TOMCAT_NAME |egrep -v "grep|$$" |awk \'{print $2}\')
        [ -n "$PID" ] && kill -9 $PID
        /bin/bash $TOMCAT_HOME/bin/startup.sh
       '''
    }
   stage('test') {
    sh "curl http://192.168.152.138:8080/status.html"
    echo "test ok!!!!!!!"
   }
}

### --- 下面为带解释版，但不可以使用，部分注释会造成问题

node ("slave02-172.16.1.3") {                         # 绑定到该节点构建
   # def mvnHome = '/usr/local/maven'
   stage('git checkout') {                            # 拉代码
        checkout([$class: 'GitSCM', branches: [[name: '${branch}']], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[url: 'git@172.16.1.3:/home/git/repos/solo']]])
   }
   stage('maven build') {                             # maven build
        sh '''export JAVA_HOME=/usr/local/java        # 在指定java环境变量
        /usr/local/maven/bin/mvn clean package -Dmaven.test.skip=true'''    # 构建maven包 clean package表示构建之前会清理之前构建的包，-Dmaven.test.skip=true表示跳过单元测试
   }
   stage('deploy') {                                  # 部署
        sh '''
        JENKINS_NODE_COOKIE=dontkillme                # tomcat启动时会衍生出一些子进程，然后才能成功启动，但是jenkins会在构建结束杀掉tomcat的那些衍生子进程，造成tomcat启动失败，此处加上这个参数可以解决这个问题。
        export JAVA_HOME=/usr/local/java
        TOMCAT_NAME=tomcat
        TOMCAT_HOME=/usr/local/$TOMCAT_NAME
        WWWROOT=$TOMCAT_HOME/webapps/ROOT

        if [ -d $WWWROOT ]; then                      # 如果目录存在，先备份
           mv $WWWROOT /data/backup/${TOMCAT_NAME}-$(date +"%F_%T")
        fi
        unzip ${WORKSPACE}/target/*.war -d $WWWROOT   # 项目包解压到站点目录
        PID=$(ps -ef |grep $TOMCAT_NAME |egrep -v "grep|$$" |awk \'{print $2}\')   # 重启tomcat
        [ -n "$PID" ] && kill -9 $PID
        /bin/bash $TOMCAT_HOME/bin/startup.sh'''
   }
   stage('test') {                                     # 测试
        # sh "curl http://wp.test.com/status.html"
        echo "test ok!!!!!!!"
   }
}

四、构建

五、访问

---

附录一：pipeline script from SCM方式下：

### --- 报错现象： 
~~~     pipeline script from SCM方式下：

Started by user ***
java.io.FileNotFoundException
    at jenkins.plugins.git.GitSCMFile$3.invoke(GitSCMFile.java:167)
    at jenkins.plugins.git.GitSCMFile$3.invoke(GitSCMFile.java:159)
    at jenkins.plugins.git.GitSCMFileSystem$3.invoke(GitSCMFileSystem.java:193)
    ...l
Finished: FAILURE

### --- 解决方案：

~~~~        ——>**原因是git工程下，没有找到Script Path路径下的脚本文件**。

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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