前言：

Jenkins是一个免费且开源的自动化工具，提供持续集成、持续交付以及持续部署，无论你使用任何平台Jenkins都可以处理任何类型的构建和部署。

环境：

CentOS Linux release 7.4.1708 (Core)
java-1.8.0-openjdk.x86_64 1:1.8.0.171-8.b10.el7_5 //2.54（2017-04）和更新版本：java1.8+

安装条件：

最低硬件要求：
    256MB的RAM
    1GB的磁盘空间（如果将Jenkins作为Docker容器运行，建议最小值为10GB）

小团队的推荐硬件配置：
    1GB+RAM
    50GB+的磁盘空间

以上内容来自Jenkins官网：https://jenkins.io/doc/book/installing/

安装部署：

安装jdk环境：

[root@Jenkins ~]# yum -y install java-1.8.0-openjdk
此次省略一万行……
[root@Jenkins ~]# java -version
openjdk version "1.8.0_171"
OpenJDK Runtime Environment (build 1.8.0_171-b10)
OpenJDK 64-Bit Server VM (build 25.171-b10, mixed mode)

安装Jenkins：

[root@Jenkins ~]# wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
--2018-07-20 14:22:21--  https://pkg.jenkins.io/redhat-stable/jenkins.repo
Resolving pkg.jenkins.io (pkg.jenkins.io)... 52.202.51.185
Connecting to pkg.jenkins.io (pkg.jenkins.io)|52.202.51.185|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 85
Saving to: ‘/etc/yum.repos.d/jenkins.repo’

100%[======================================>] 85          --.-K/s   in 0s      

2018-07-20 14:22:23 (2.11 MB/s) - ‘/etc/yum.repos.d/jenkins.repo’ saved [85/85]

[root@Jenkins ~]# rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

[root@Jenkins ~]# yum -y install jenkins
此处仍然省略一万行……
[root@Jenkins ~]# systemctl start jenkins
[root@Jenkins ~]# systemctl status jenkins
● jenkins.service - LSB: Jenkins Automation Server
   Loaded: loaded (/etc/rc.d/init.d/jenkins; bad; vendor preset: disabled)
   Active: active (running) since 五 2018-07-20 14:26:17 CST; 5s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 1360 ExecStart=/etc/rc.d/init.d/jenkins start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/jenkins.service
           └─1379 /etc/alternatives/java -Dcom.sun.akuma.Daemon=daemonized -D...

7月 20 14:26:16 Jenkins systemd[1]: Starting LSB: Jenkins Automation Server...
7月 20 14:26:16 Jenkins runuser[1365]: pam_unix(runuser:session): session o...)
7月 20 14:26:17 Jenkins jenkins[1360]: Starting Jenkins [  确定  ]
7月 20 14:26:17 Jenkins systemd[1]: Started LSB: Jenkins Automation Server.
Hint: Some lines were ellipsized, use -l to show in full.

在浏览器上输入http://ip:8080/

"1.png"
[root@Jenkins ~]# cat /var/lib/jenkins/secrets/initialAdminPassword
69377335a92b4ddfab420ea0777e91da