一. java -jar jenkins.war方式运行(不推荐)

1. 下载并安装

官方getting-started查看

#下载
[root@node02 ~]# wget http://mirrors.jenkins.io/war-stable/latest/jenkins.war
#运行
[root@node02 ~]# java -jar jenkins.war --httpPort=8888

优先安装java8 jdk并配置环境变量

保存密码

访问jenkins http://192.168.2.44:8888

2. 测试

创建一个项目

二. yum方式安装（推荐）

Jenkins安装包地址

一个是最新版的，一个是稳定版的。

[root@wanfei ~]# sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo
[root@wanfei ~]# sudo rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key
[root@wanfei ~]# sudo yum install jenkins

优先安装java8 jdk并配置环境变量

修改端口

[root@wanfei ~]# vi /etc/sysconfig/jenkins
#修改
JENKINS_PORT="8080"
JENKINS_PORT="8888"

启动

[root@wanfei ~]#  service jenkins restart
Restarting jenkins (via systemctl):                        [  OK  ]

访问jenkins http://192.168.2.44:8888

从下面文件可以查看到密码(一次性的，输入后就自动删除了)

接下来和上面一样 --->选择插件安装

三. yum安装jenkins，生成ssh key，并测试连接

使用yum安装jenkins要切换jenkins生成ssh key保存到git上，jenkins才能连上

3.1 切换jenkins用户生成ssh key

#切换用户没反应
[root@wanfei ~]# su jenkins

#jenkins安装后修改了配置，改回来
[root@wanfei ~]# sudo vim /etc/passwd
jenkins:x:996:992:Jenkins Automation Server:/var/lib/jenkins:/bin/false  #修改
jenkins:x:996:992:Jenkins Automation Server:/var/lib/jenkins:/bin/bash

[root@wanfei ~]# su jenkins
#发现前面的是bash-4.2
bash-4.2$ vim ~/.bash_profile 
#没有文件的话创建新文件，添加
export PS1='[\u@\h \W]\$'
#生效
bash-4.2$ source ~/.bash_profile

#切换到root，删除以前生成的ssh key
[jenkins@wanfei root]$su root
Password: 
[root@wanfei ~]#cd .ssh
[root@wanfei .ssh]#ls
id_rsa  id_rsa.pub  known_hosts
[root@wanfei .ssh]#rm -rf id_*
[root@wanfei .ssh]#ls
known_hosts
#清空
[root@wanfei .ssh]#vi known_hosts 
[root@wanfei .ssh]#cd ~
[root@wanfei ~]#su jenkins
[jenkins@wanfei root]$cd ~/.ssh
[jenkins@wanfei .ssh]$ls
known_hosts
#清空
[jenkins@wanfei .ssh]$vi known_hosts 
[jenkins@wanfei .ssh]$ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/var/lib/jenkins/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /var/lib/jenkins/.ssh/id_rsa.
Your public key has been saved in /var/lib/jenkins/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:XkaQ3TC8q/lsGAsaO4IndWD1HQP03xN/s5H1wrRmTaQ jenkins@wanfei
The key's randomart image is:
+---[RSA 2048]----+
|     .o..+oo    .|
|    .  .+.o..  o |
|   . . ..o... E o|
|  o   . .o.. = ++|
| . .    S +.o B++|
|  . o ...o.  + o+|
| o . + ..*     . |
|o o +   =..      |
| o . .   oo      |
+----[SHA256]-----+
[jenkins@wanfei .ssh]$ls
id_rsa  id_rsa.pub  known_hosts
#查看ssh key
[jenkins@wanfei .ssh]$vi id_rsa.pub 

[1]+  Stopped                 vi id_rsa.pub

#切换root
[root@wanfei ~]#cd ~/.ssh
[root@wanfei .ssh]#ls
known_hosts
[root@wanfei .ssh]#cd /var/lib/jenkins/.ssh
[root@wanfei .ssh]#ls
id_rsa  id_rsa.pub  known_hosts
[root@wanfei .ssh]#scp id_rsa* ~/.ssh
[root@wanfei .ssh]#cd ~/.ssh
[root@wanfei .ssh]#ls
id_rsa  id_rsa.pub  known_hosts

3.2 在jenkins上测试连接gitlab下载代码

随便创建一个项目

git ls-remote -h ssh://git@47.99.37.64:2222/www19930327/mybatisplus-springmvc.git HEAD