CentOS 7.4 安装Jenkins

使用yum方式安装Jenkins
参考文章CentOS7下yum安装Jenkins

安装Jenkins

参考官方指导进行Jenkins yum源导入。

# sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
# sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

进行安装

# yum install jenkins

显示如图所示表示安装完毕

Jenkins Install Complete

查看安装路径

# rpm -ql jenkins

Jenkins Install Path

路径解析

• /usr/lib/jenkins:Jenkins安装目录，war包存放于此
• /etc/sysconfig/jenkins:Jenkins配置文件、端口、JENKINS_HOME等配置信息
• /var/lib/jenkins:默认的JENKINS_HOME
• /var/log/jenkins:Jenkins日志存放路径

启动Jenkins

查看端口占用

# netstat -lnp|grep 'port'

端口8081未被占用

配置启动端口

# vim /etc/sysconfig/jenkins
# #vim命令，打开命令框
# [shift]+[:]
# #vim命令，执行搜索
# [/]+"JENKINS_PORT"
# 修改值"8080"为"8081"

修改Jenkins端口

防火墙开启端口

CentOS默认使用firewalld作为防火墙管理工具。

Firewalld基本使用方式参考

开启8081端口

# firewall-cmd --zone=public --add-port=8081/tcp --permanent

刷新配置

# firewall-cmd --reload

启动Jenkins

# java -jar /usr/lib/jenkins/jenkins.war --httpPort=8081

启动Jenkins之后访问就可以看到管理员密码输入界面

添加开机自启动

将Jenkins服务设置为开机自启动

# systemctl enable jenkins.service
jenkins.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig jenkins on

启动Jenkins服务

# systemctl start jenkins.service

启动Jenkins服务失败

我这里在启动的时候报了异常信息Job for jenkins.service failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details.,通过systemctl status jenkins.service查询得知

# 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 Wed 2018-12-05 09:51:56 CST; 16s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 25674 ExecStart=/etc/rc.d/init.d/jenkins start (code=exited, status=1/FAILURE)

Dec 05 09:51:56 izbp1d1juyl8z6ucflj9v3z systemd[1]: Starting LSB: Jenkins Automation Server...
Dec 05 09:51:56 izbp1d1juyl8z6ucflj9v3z runuser[25679]: pam_unix(runuser:session): session opened for user jenkins by...d=0)
Dec 05 09:51:56 izbp1d1juyl8z6ucflj9v3z jenkins[25674]: Starting Jenkins bash: /usr/bin/java: No such file or directory
Dec 05 09:51:56 izbp1d1juyl8z6ucflj9v3z jenkins[25674]: [FAILED]
Dec 05 09:51:56 izbp1d1juyl8z6ucflj9v3z systemd[1]: jenkins.service: control process exited, code=exited status=1
Dec 05 09:51:56 izbp1d1juyl8z6ucflj9v3z systemd[1]: Failed to start LSB: Jenkins Automation Server.
Dec 05 09:51:56 izbp1d1juyl8z6ucflj9v3z systemd[1]: Unit jenkins.service entered failed state.
Dec 05 09:51:56 izbp1d1juyl8z6ucflj9v3z systemd[1]: jenkins.service failed.

是因为找不到/usr/bin/java文件造成。这是因为我们是手动安装的jdk，导致并不会在/usr/bin目录下生成相应的文件。此时，只需要修改Jenkins的service文件，添加java启动文件路径即可。

修改服务配置

服务配置的路径在/etc/rc.d/init.d/jenkins，编辑该文件

# vim /etc/rc.d/init.d/jenkins

输入[:]+[/]+'java'+[enter]在文件中搜索'java'，添加java执行文件，我这里是/opt/java/jdk1.8/bin

修改java路径

启动服务

# #加载修改过的配置信息
[root@izbp1d1juyl8z6ucflj9v3z bin]# systemctl daemon-reload
# #启用配置文件
[root@izbp1d1juyl8z6ucflj9v3z bin]# systemctl enable jenkins
jenkins.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig jenkins on
# #启动jenkins服务
[root@izbp1d1juyl8z6ucflj9v3z bin]# systemctl start jenkins

此时，Jenkins服务启动成功，可以打开Jenkins了。