使用jenkins发布java项目

发布java项目的步骤
1.拉去代码并打包
    git clone 下载复制
    mvn clean package （maven）
2.备份目标服务器删已有的要发布的项目
3.把打包好的包传到目标服务起的webapps目录中 （在target目录）
    需要做免密登录
4.重启目标服务器的tomcat目录
5.修改项目的配置（每个项目有有不同的要求，问开发）
6.重启目标服务器的tomcat目录

[root@jenkins ~]# ssh-keygen -t rsa 
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
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:ny+oYi1OCIp9kO4Vk8mTVnWcBEz/ILBwlO4kPi5yTzI root@servera
The key's randomart image is:
+---[RSA 3072]----+
|    ..++++o.     |
|     o.+.oo      |
|     .o . o      |
|   o.=o  . o     |
|. o.X+  S   .    |
|o+ +o+.  . .     |
|o E.=o   .o      |
|..oB= . . ..     |
| o.=oo..   ..    |
+----[SHA256]-----+
[root@jenkins ~]# ssh-copy-id root@192.168.75.142
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host '192.168.75.142 (192.168.75.142)' can't be established.
ECDSA key fingerprint is SHA256:5qOF5FRPjY0OzwFwqov0PteM2vjkjkp48ZhK3fRT25Y.
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@192.168.75.142's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@192.168.75.142'"
and check to make sure that only the key(s) you wanted were added.

[root@jenkins ~]# ssh root@192.168.75.143
Last login: Tue Oct 19 16:28:58 2021 from 192.168.75.1
[root@servera ~]# 

[root@jenkins ~]# git clone https://gitee.com/jinchenghe92/tomcat-java-demo.git
正克隆到 'tomcat-java-demo'...
remote: Enumerating objects: 558, done.
remote: Total 558 (delta 0), reused 0 (delta 0), pack-reused 558
接收对象中: 100% (558/558), 5.08 MiB | 212.00 KiB/s, 完成.
处理 delta 中: 100% (217/217), 完成.

[root@jenkins ~]# yum install -y maven

[root@jenkins ~]# ls
anaconda-ks.cfg              jenkins.war
apache-tomcat-9.0.54.tar.gz  tomcat-java-demo
[root@jenkins ~]# cd tomcat-java-demo/
[root@jenkins tomcat-java-demo]# ls
db           Dockerfile   LICENSE  README.md
deploy.yaml  jenkinsfile  pom.xml  src
[root@jenkins tomcat-java-demo]# mvn clean package
[INFO] Scanning for projects...
......
[INFO] ------------------------------------------------------------------------
[root@jenkins tomcat-java-demo]# ls
db           Dockerfile   LICENSE  README.md  target
deploy.yaml  jenkinsfile  pom.xml  src