java程序发布步骤

1.拉取代码并打包
2.备份原程序
3.拷贝新程序到服务器的webapps目录中，停一会修改配置
4.重启tomcat
5.验证

Jenkins发布java项目到另一台主机的tomcat中

环境介绍：

名称	IP	服务
jenkins	192.168.159.110	jenkins
server	192.168.159.120	tomcat

手动版

//server上部署一个tomcat
//拉取代码
[root@jenkins ~]# yum -y install git
[root@jenkins ~]# cd /opt/
[root@jenkins opt]# git clone https://gitee.com/forgotten/tomcat-java-demo.git
正克隆到 'tomcat-java-demo'...
remote: Enumerating objects: 558, done.
remote: Counting objects: 100% (558/558), done.
remote: Compressing objects: 100% (316/316), done.
remote: Total 558 (delta 217), reused 558 (delta 217), pack-reused 0
接收对象中: 100% (558/558), 5.08 MiB | 8.00 MiB/s, done.
处理 delta 中: 100% (217/217), done.
[root@jenkins opt]# ls
tomcat-java-demo

//下载打包工具maven
[root@jenkins tomcat-java-demo]# yum -y install maven
[root@jenkins tomcat-java-demo]# mvn clean package

//target里面是打包好的
[root@jenkins tomcat-java-demo]# ls
db  deploy.yaml  Dockerfile  jenkinsfile  LICENSE  pom.xml  README.md  src  target
[root@jenkins tomcat-java-demo]# ls target/
classes  generated-sources  ly-simple-tomcat-0.0.1-SNAPSHOT  ly-simple-tomcat-0.0.1-SNAPSHOT.war  maven-archiver  maven-status

//名字太长改个名
[root@jenkins tomcat-java-demo]# mv target/ly-simple-tomcat-0.0.1-SNAPSHOT.war target/myapp.war
[root@jenkins tomcat-java-demo]# ls target/
classes  generated-sources  ly-simple-tomcat-0.0.1-SNAPSHOT  maven-archiver  maven-status  myapp.war

//因为要把包传到server端，所以要做免密登录，在Jenkins生成公钥传给server
[root@jenkins tomcat-java-demo]# 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:lBjSVqDTgQtSkiDQig3xd00/WGmQM9a2ZD/ERAkN30I root@jenkins
The key's randomart image is:
+---[RSA 2048]----+
|O=. .o+o+++OE.   |
|=oo .+o*==Bo=.   |
|.=..+o+.=Bo+o .  |
|o ...o .  ..o.   |
|        S    .   |
|                 |
|                 |
|                 |
|                 |
+----[SHA256]-----+

[root@jenkins tomcat-java-demo]# ssh-copy-id root@192.168.159.120
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host '192.168.159.120 (192.168.159.120)' can't be established.
ECDSA key fingerprint is SHA256:YvjlcWC1AXqLdQB7WpD6jYcN/HzeRzdaOqE0J3sVfTk.
ECDSA key fingerprint is MD5:35:e2:cf:b9:3b:6e:37:de:04:4c:aa:c1:2f:6c:2d:bf.
Are you sure you want to continue connecting (yes/no)? 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@192.168.159.120's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@192.168.159.120'"
and check to make sure that only the key(s) you wanted were added.

[root@jenkins tomcat-java-demo]# scp target/myapp.war root@192.168.159.120:/usr/local/tomcat/webapps
myapp.war                                                                                                                                                      100%   17MB  75.2MB/s   00:00 

//查看  
[root@server ~]# cd /usr/local/tomcat/
[root@server tomcat]# pwd
/usr/local/tomcat
[root@server tomcat]# ls webapps/
docs  examples  host-manager  manager  myapp  myapp.war  ROOT  test

手动部署完成

自动版

server上创建一个项目