Jenkins发布Java项目

• 1. 发布java项目的步骤：
• 2. 部署环境
• • 2.1 Tomcat部署
  • 2.2 Jenkins部署
• 3. 登录Jenkins web界面
• 4. 验证效果

1. 拉取代码并打包
   mvn clean package
2. 备份目标服务器上已有的要发布项目
3. 将包传到目标服务器的webapss目录中
   需做免密登录
4. 重启目标服务器的tomcat服务
5. 修改项目的配置
6. 重启目标服务器的tomcat服务

项目要求:
两台主机上分别安装jenkins，tomcat

环境说明：

//安装jdk环境
[root@localhost ~]# yum -y install java-11-openjdk*

//下载tomcat
[root@localhost ~]# cd /usr/src/
[root@localhost src]# wget https://archive.apache.org/dist/tomcat/tomcat-9/v9.0.53/bin/apache-tomcat-9.0.53.tar.gz

//解压部署
[root@localhost src]# ls
apache-tomcat-9.0.53.tar.gz  debug  kernels
[root@localhost src]# tar xf apache-tomcat-9.0.53.tar.gz -C /usr/local/
[root@localhost src]# cd /usr/local/
[root@localhost local]# ln -s apache-tomcat-9.0.53/ tomcat

//使用service控制tomcat
[root@localhost ~]# cd /usr/lib/systemd/system
[root@localhost system]# cp sshd.service tomcat.service
[root@localhost system]# vim tomcat.service 
[root@localhost system]# cat tomcat.service 
[Unit]
Description=Tomcat server daemon
After=network.target sshd-keygen.target

[Service]
Type=forking
ExecStart=/usr/local/tomcat/bin/catalina.sh start
ExecStop=/usr/local/tomcat/bin/catalina.sh stop
ExecReload=/bin/kill -HUP $MAINPID

[Install]
WantedBy=multi-user.target
[root@localhost system]# systemctl daemon-reload 
[root@localhost system]# systemctl enable --now tomcat.service 
Created symlink /etc/systemd/system/multi-user.target.wants/tomcat.service → /usr/lib/systemd/system/tomcat.service.

[root@localhost system]# ss -antl
State                 Recv-Q                Send-Q                                    Local Address:P
LISTEN                0                     32                                        192.168.122.1:5
LISTEN                0                     128                                             0.0.0.0:2
LISTEN                0                     5                                             127.0.0.1:6
LISTEN                0                     128                                           127.0.0.1:6
LISTEN                0                     128                                             0.0.0.0:1
LISTEN                0                     100                                                   *:8
LISTEN                0                     128                                                [::]:2
LISTEN                0                     5                                                 [::1]:6
LISTEN                0                     128                                               [::1]:6
LISTEN                0                     1                                    [::ffff:127.0.0.1]:8
LISTEN                0                     128                                                [::]:1
[root@localhost system]# 

Jenkins部署过程可以参考这篇文章:https://blog.csdn.net/qq_49530779/article/details/120827362?spm=1001.2014.3001.5501

//两台主机做好免密登录
[root@localhost ~]# ssh-keygen -t rsa

[root@localhost ~]# ssh-copy-id root@192.168.8.130
root@192.168.8.130's password: 1

//安装软件
[root@localhost ~]# yum -y install git maven

案例：需要将开发人员写好的代码进行测试，如下图


新建项目


编写脚本

当拉取的项目是私有仓库时候，需要点击流水线语法进行设置

输入仓库地址，用户名，密码生成流水线脚本

将生成好的id添加到脚本中

pipeline {
    agent any


    stages {
        stage('Build') {
            steps {
                // Get some code from a GitHub repository
               // git 'https://gitee.com/pengyudong/tomcat-java-demo.git'
                git credentialsId: '08e4b3ab-dac8-4ebe-aee4-188fe94cb0c6', url: 'https://gitee.com/pengyudong/tomcat-java-demo.git'

                // Run Maven on a Unix agent.
                sh "mvn -Dmaven.test.failure.ignore=true clean package"
                sh 'mv target/ly-simple-tomcat-0.0.1-SNAPSHOT.war target/myapp.war'

                // To run Maven on a Windows agent, use
                // bat "mvn -Dmaven.test.failure.ignore=true clean package"
            }
        }
        stage("publish"){
            steps{
                //ssh root@192.168.8.130 'tar -Jcf /opt/backup/myapp-$(date +%Y%m%d).tar.xz /usr/local/tomcat/webapps/myapp
                sh "scp target/myapp.war root@192.168.8.130:/usr/local/tomcat/webapps/"
                sh "ssh root@192.168.8.130 '/usr/local/tomcat/bin/catalina.sh stop'"
                sleep 3
                sh "ssh root@192.168.8.130 '/usr/local/tomcat/bin/catalina.sh start'"
            }    
        }
    }
}

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