通过jenkins发布java项目到另一台主机的tomcat容器中

发布java项目的步骤：

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

// 免密登录
[root@Jenkins ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:kUKqwTGEYI5tGvsmBDTzpnWcCU77MKTp3LvqTbO1lVI root@localhost.localdomain
The key's randomart image is:
+---[RSA 3072]----+
|oB++  .          |
|*oXo+oo  .       |
|++=O.=. o        |
|+==o=  . .       |
|o=.. . ES        |
|..  . . .        |
|. o+ o o         |
| oo = +          |
|.o.+ .           |
+----[SHA256]-----+
[root@Jenkins ~]# ssh-copy-id root@192.168.200.161
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host '192.168.200.161 (192.168.200.161)' can't be established.
ECDSA key fingerprint is SHA256:xazUS164tWwVrYbH9VmtpQ5vprjch054f5zV/CCI3Y0.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.200.161's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@192.168.200.161'"
and check to make sure that only the key(s) you wanted were added.

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

pipeline {
    agent any

    stages {
        stage('Build') {
            steps {
                // Get some code from a GitHub repository
                git 'https://gitee.com/jinchenghe92/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@192.168.200.161 'tar -Jcf /opt/backup/myapp-$(date +%Y%m%d).tar.xz /usr/local/tomcat/webapps/myapp'
                sh "scp target/myapp.war root@192.168.200.161:/usr/local/tomcat/webapps/"
                sh "ssh root@192.168.200.161 '/usr/localtomcat/bin/catalina.sh stop;sleep 3;/usr/local/tomcat/bin/catalina.sh start'"
            }
        }
    }   
}