Jenkins安装

Leefs 2020-01-18 AM 1978℃ 0条

# Jenkins安装

今天小编不是在踩坑就是在踩坑的路上......

### 一、安装JDK

因为Jenkins是通过Java开发的，所以在安装Jenkins之前需要先安装JDK

本篇将比在阐述JDK的安装步骤，如果需要可以参考文章：[Linux服务器搭建JavaWEB项目(一)](https://lilinchao.com/archives/349.html)

### 二、Jenkins安装与启动

（1）下载jenkins（此处可能需要修改一下版本号）

```
wget https://pkg.jenkins.io/redhat/jenkins-2.83-1.1.noarch.rpm
```

或将jenkins-2.83-1.1.noarch.rpm上传至服务器

（2）安装jenkins

```
rpm -ivh jenkins-2.83-1.1.noarch.rpm
```

（3）配置jenkins

```
vi /etc/sysconfig/jenkins
```

修改用户和端口

```
JENKINS_USER="root"
JENKINS_PORT="8888"
```

（4）启动服务

```
systemctl start jenkins
ps -ef | grep jenkins
```

**此时报如下错误**

```visual basic
[root@localhost ~]# systemctl start jenkins
Job for jenkins.service failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details.
[root@localhost ~]# systemctl status jenkins.service
● jenkins.service - LSB: Jenkins Automation Server
   Loaded: loaded (/etc/rc.d/init.d/jenkins; bad; vendor preset: disabled)
   Active: failed (Result: exit-code) since Sun 2020-01-12 03:20:43 EST; 1min 1s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 5111 ExecStart=/etc/rc.d/init.d/jenkins start (code=exited, status=1/FAILURE)

Jan 12 03:20:43 localhost systemd[1]: Starting LSB: Jenkins Automation Server...
Jan 12 03:20:43 localhost runuser[5116]: pam_unix(runuser:session): session opened for user root by (uid=0)
Jan 12 03:20:43 localhost jenkins[5111]: Starting Jenkins bash: /usr/bin/java: No such file or directory
Jan 12 03:20:43 localhost systemd[1]: jenkins.service: control process exited, code=exited status=1
Jan 12 03:20:43 localhost jenkins[5111]: [FAILED]
Jan 12 03:20:43 localhost systemd[1]: Failed to start LSB: Jenkins Automation Server.
Jan 12 03:20:43 localhost systemd[1]: Unit jenkins.service entered failed state.
Jan 12 03:20:43 localhost systemd[1]: jenkins.service failed.
```

上方报错的大致意思是java路径找不到

```
Jan 12 03:20:43 localhost jenkins[5111]: Starting Jenkins bash: /usr/bin/java: No such file or directory
```

执行如下命令查看Java安装路径

```
[root@localhost bin]# whereis java
java: /home/user/java/jdk1.8.0_181/bin/java
```

执行命令

```
[root@localhost bin]# vim /etc/rc.d/init.d/jenkins
```

在candidates="”最后一个引号前加上Java安装路径

![Jenkis安装01.png][1]

重新启动Jenkins

```
systemctl start jenkins
```

此时提醒如下警告信息

```
[root@localhost bin]# systemctl restart jenkins
Warning: jenkins.service changed on disk. Run 'systemctl daemon-reload' to reload units.
```

按照提示执行systemctl daemon-reload就可以了

（5）访问链接 http://192.168.102.144:8888/

从/var/lib/jenkins/secrets/initialAdminPassword中获取初始密码串

![Jenkis安装02.png][2]

执行如下命令

```
[root@localhost ~]# cat /var/lib/jenkins/secrets/initialAdminPassword
11aa400dd80d4e30a1f84ab6716a3de3
```

（6）安装插件

![Jenkis安装03.png][3]

**注意**

如果安装完成后无法访问的可以试着开启888端口的防火墙

```
firewall-cmd --zone=public --add-port=8888/tcp --permanent
firewall-cmd --reload
```

或者关闭防火墙

```
[root@localhost ~]# firewall-cmd --state #查看防火墙状态
running
[root@localhost ~]# systemctl stop firewalld.service #关闭防火墙
[root@localhost ~]# firewall-cmd --state
not running
```

[1]: https://lilinchao.com/usr/uploads/2020/01/3518905373.png
  [2]: https://lilinchao.com/usr/uploads/2020/01/1158320890.png
  [3]: https://lilinchao.com/usr/uploads/2020/01/2536311310.png

标签: Linux, CentOS, Jenkins

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