前言

上节讲了SpringBoot上的打包。但这些过程都是手动的，在实际的开发测试时，自动化的打包部署，可以大大提升团队开发的效率

一、去官网下载

1.1 官网安装命令

对于如何安装的问题，我向来推荐官网

wget -O /usr/share/keyrings/jenkins-keyring.asc \
    https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key

  echo "deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc]" \
    https://pkg.jenkins.io/debian-stable binary/ | sudo tee \
    /etc/apt/sources.list.d/jenkins.list > /dev/null
 
 sudo apt-get update
 sudo apt-get install fontconfig
 sudo apt-get install jenkins

1.2 错误解决

如果出现如下错误：

Created symlink /etc/systemd/system/multi-user.target.wants/jenkins.service → /lib/systemd/system/jenkins.service.
Could not execute systemctl:  at /usr/bin/deb-systemd-invoke line 148.

则键入：

journalctl -u jenkins
journalctl -xeu jenkins.service

查看到底错哪了，显示说：

jenkins: failed to find a valid Java installation
jenkins.service: Main process exited, code=exited, status=1/FAILU>
jenkins.service: Failed with result 'exit-code'.
Failed to start Jenkins Continuous Integration Server.

这说明jenkins没找到jre环境
用vim打开/lib/systemd/system/jenkins.service
我们可以看到，执行的脚本是/usr/bin/jenkins，用vim打开它

其实，应该是jenkins无法获取我在root中设置的环境，那就把jenkins改成root。
再次vim /lib/systemd/system/jenkins.service，更改如下配置

[Service]
...
#执行脚本前，运行一下设置环境变量
ExecStart=/bin/bash -c 'source /etc/profile &&  /usr/bin/jenkins'


Environment="JENKINS_PORT=8888"
#让jenkin放到nginx后面
Environment="JENKINS_PREFIX=/jenkins"
User=root
Group=root

systemctl daemon-reload
systemctl start jenkins

1.3 配置nginx

location /jenkins {
                proxy_pass http://127.0.0.1:8888;
                proxy_set_header Host $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_read_timeout 90;
}

这样一来，我们就可以通过192.160.0.64/jenkins访问jenkins了

二、jenkins插件安装与设置

2.1 初始化

进入jenkins，首先页面如图所示

vim /var/lib/jenkins/secrets/initialAdminPassword

把密钥拷贝过来，进入jenkins，然后安装需要的插件。
尤其要安装的是SSH Pipeline Steps，用于远程访问

2.2 记得安装git

如果出现Failed to connect to repository : Error performing git command: git ls-remote -h https://gitee.com/**/*.git HEAD 这一类的错误时，说明宿主机没有装git，apt install git一下即可

2.3 git的账户密码设置

点击Credentials

添加一个凭证

三、流水线自动编译部署

3.1 目标

上节我们讲了SpringBoot下的打包，把lib，resource，config等分离了出去。所以我们这次的自动化编译，需要可以勾选是否更新lib,resource,config的选项。
同一个项目，可能被部署为多个实例，不同实例部署在不同端口。
编译好的项目，将被部署到/WORK/APP/study2024-class004/$appName，并调用startup.sh脚本启动项目

3.2 参数化

勾选This project is parameterized，添加如下参数

参数名	默认值	描述
profile	test	环境
appName	app001	部署文件夹
port	8081	端口
version	1.0.0	版本
isUpdateCode	true	是否更新代码
isUpdateBin	false	是否更新bin
isUpdateConfig	false	是否更新配置文件
isUpdateLib	false	是否更新lib包
isUpdateStatic	false	是否更新静态资源
isUpdateMapper	false	是否更新mapper
gitTag	*/master	git分支

要值得注意的是，gitTag是Git parameter，Advance里，Branch Filter设置为origin/(.*)

3.3 jenkins文件

import java.text.SimpleDateFormat

node{

    def remote = [:]
    remote.name = '地下室主机'
    remote.host = '192.168.0.64'
    remote.user = 'root'
    remote.password = 'ilv0404@1314'
    remote.deploymentHome = "/WORK/APP/study2024-class003"
    remote.allowAnyHosts = true

    def app = [:]

    app.module = "busy/general-test"
    app.name = "nbr"
    app.version = "${version}"
    app.cd = "${appName}"
    app.port = "${port}"

    def timestamp = currentBuild.getTimeInMillis()
    def formattedTimestamp = new SimpleDateFormat("yyyy-MM-dd-HH_mm_ss").format(timestamp)


    stage("拉取代码"){
        git branch: "${gitTag}", credentialsId: 'gitSec', url: 'https://gitee.com/hataksumo/study2024-class004.git'
    }

    stage("编译代码"){
        sh """
            cd code
            mvn clean
            mvn package -pl busy/general-test -am -P${profile} -Dmaven.test.skip=true
        """
    }

    stage("远程推送"){

        echo "停服"
        sshCommand remote: remote, failOnError:false, command: """
        cd ${remote.deploymentHome}/${app.cd}/bin
        ./shutdown.sh --appName ${app.cd}
        """

        if(isUpdateCode == "true"){
            echo "备份jar包"
            sshCommand remote: remote, failOnError:false, command: "mv ${remote.deploymentHome}/${app.cd}/${app.name}-${app.version}.jar ${remote.deploymentHome}/${app.cd}/${app.name}-${app.version}.jar.bac"
            echo "拷贝jar包"
            sshPut remote: remote, from: "code/${app.module}/target/${app.name}.jar", into: "${remote.deploymentHome}/${app.cd}/${app.name}-${app.version}.jar"
            echo "删除jar包"
            sshRemove remote: remote, failOnError:false, path: "${remote.deploymentHome}/${app.cd}/${app.name}-${app.version}.jar.bac"
        }

        if(isUpdateConfig == "true"){
            echo "删除config"
            sshRemove remote: remote, failOnError:false, path: "${remote.deploymentHome}/${app.cd}/config"
            echo "拷贝lib包"
            sshPut remote: remote, from: "code/${app.module}/target/config", into: "${remote.deploymentHome}/${app.cd}"
        }

        if(isUpdateLib == "true"){
            echo "删除lib包"
            sshRemove remote: remote, failOnError:false, path: "${remote.deploymentHome}/${app.cd}/lib"
            echo "拷贝lib包"
            sshPut remote: remote, from: "code/${app.module}/target/lib", into: "${remote.deploymentHome}/${app.cd}"
        }

        sshCommand remote: remote, failOnError:false, command: "mkdir ${remote.deploymentHome}/${app.cd}/resources"

        if(isUpdateStatic == "true"){
            echo "清除resources/static文件"
            sshRemove remote: remote, failOnError:false, path: "${remote.deploymentHome}/${app.cd}/resources/static"
            echo "拷贝static文件"
            sshPut remote: remote, from: "code/${app.module}/target/resources/static", into: "${remote.deploymentHome}/${app.cd}/resources"
        }

        if(isUpdateMapper == "true"){
            echo "清除resources/mybatis文件"
            sshRemove remote: remote, failOnError:false, path: "${remote.deploymentHome}/${app.cd}/resources/mybatis"
            echo "拷贝mybatis文件"
            sshPut remote: remote, from: "code/${app.module}/target/resources/mybatis", into: "${remote.deploymentHome}/${app.cd}/resources"
        }

        if(isUpdateBin == "true"){
            echo "清除bin文件"
            sshRemove remote: remote, failOnError:false, path: "${remote.deploymentHome}/${app.cd}/bin"
            echo "拷贝bin文件"
            sshPut remote: remote, from: "code/${app.module}/target/bin", into: "${remote.deploymentHome}/${app.cd}"
            echo "赋予可执行权限"
            sshCommand remote: remote, failOnError:false, command: """
            cd ${remote.deploymentHome}/${app.cd}/bin
            chmod +x startup.sh
            chmod +x shutdown.sh
            """
        }

        echo "启服"
        sshCommand remote: remote, command: """
        source /etc/profile
        echo "path = $PATH"
        cd ${remote.deploymentHome}/${app.cd}/bin
        ./startup.sh --version ${app.version} --appName ${app.cd} --port ${app.port}
        """
    }

}

3.4 启动

点击后，就可以自动的编译部署了。