centos7 下的jenkins安装_centos jenkins jdk1.8 安装, 安装插件‘-优快云博客

首先你要满足安装了centos7，jdk8（由于我使用的是jenkins2.346，以下所指皆为此版本，此外该版本是可以支持jdk8的，如果有使用其他版本jenkins，具体可参照https://mirrors.jenkins.io/war-stable/的对应关系来确定jdk版本），maven

首先检查是否已安装jenkins：

已rpm安装过Jenkins，现在先卸载

# 1.卸载
rpm -e jenkins
# 2.检查是否卸载成功
rpm -ql jenkins
# 3.彻底删除残留文件：
find / -iname jenkins | xargs -n 1000 rm -rf

安装jenkins可以使用几种方式。

第一种：手动下载rpm包安装。这里使用清华开源镜像站的链接https://mirrors.tuna.tsinghua.edu.cn/jenkins/redhat/，找到jenkins-2.346-1.1.noarch.rpm下载。

安装jenkins

rpm -ivh jenkins-2.346-1.1.noarch.rpm

给Jenkins的配置文件赋予读写权限

chmod -R 777 /var/lib/jenkins
chmod -R 777 /var/cache/jenkins
chmod -R 777 /var/log/jenkins
# 或
chown -R root:root /var/lib/jenkins
chown -R root:root /var/cache/jenkins
chown -R root:root /var/log/jenkins

使用systemctl启动，以前的老配置文件是不管用的，需要修改启动文件

vim /usr/lib/systemd/system/jenkins.service

修改以下配置，一定注意更改JAVA_HOME路径，不然启动时会报错，端口自己用哪个就配成哪个。

# Unix account that runs the Jenkins daemon
# Be careful when you change this, as you need to update the permissions of
# $JENKINS_HOME, $JENKINS_LOG, and (if you have already run Jenkins)
# $JENKINS_WEBROOT.
User=root
Group=root

# The Java home directory. When left empty, JENKINS_JAVA_CMD and PATH are consulted.
Environment="JAVA_HOME=/usr/java/jdk1.8"

# Port to listen on for HTTP requests. Set to -1 to disable.
# To be able to listen on privileged ports (port numbers less than 1024),
# add the CAP_NET_BIND_SERVICE capability to the AmbientCapabilities
# directive below.
Environment="JENKINS_PORT=9999"

# Set to true to enable logging to /var/log/jenkins/access_log.
Environment="JENKINS_ENABLE_ACCESS_LOG=true"

# Arbitrary additional arguments to pass to Jenkins.
# Full option list: java -jar jenkins.war --help
Environment="JENKINS_OPTS=--logfile=/var/log/jenkins/jenkins.log"

修改jenkins配置文件，添加jdk

vim /etc/init.d/jenkins

更改以下内容，注意第一行为我的jdk路径

# Search usable Java as /usr/bin/java might not point to minimal version required by Jenkins.
# see http://www.nabble.com/guinea-pigs-wanted-----Hudson-RPM-for-RedHat-Linux-td25673707.html
candidates="
/usr/java/jdk1.8/bin/java
/etc/alternatives/java
/usr/lib/jvm/java-1.8.0/bin/java
/usr/lib/jvm/jre-1.8.0/bin/java
/usr/lib/jvm/java-11.0/bin/java
/usr/lib/jvm/jre-11.0/bin/java
/usr/lib/jvm/java-11-openjdk-amd64
"

修改权限

vim /etc/sysconfig/jenkins

修改以下内容

## Type:        string
## Default:     "jenkins"
## ServiceRestart: jenkins
#
# Unix user account that runs the Jenkins daemon
# Be careful when you change this, as you need to update
# permissions of $JENKINS_HOME and /var/log/jenkins,
# and if you have already run Jenkins, potentially other
# directories such as /var/cache/jenkins .
#
JENKINS_USER="root"

## Type:        yesno
## Default:     no
## ServiceRestart: jenkins
#
# Whether to enable access logging or not.
#
JENKINS_ENABLE_ACCESS_LOG="true"

全部修改完后，启动jenkins

# 修改完成启动
systemctl daemon-reload
# 启动
systemctl start jenkins.service
# 停止
systemctl stop jenkins.service
# 加入开机启动
systemctl enable jenkins.service
# 查看jenkins状态
systemctl status jenkins.service

如果启动失败，并提示

Job for jenkins.service failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details

此问题通常由于以下几点，反正我遇到的是这两种，其他情况还没遇到不好说

jdk版本不匹配问题，请参照jenkins版本与jdk版本对照，以及jenkins配置来定位问题；

jenkins配置文件中的JAVA_HOME配置路径不对。

如果启动成功但是无法访问，排除是否为防火墙问题

# 查看是否开启防火墙
systemctl status firewalld

# 若是为dead，则没有开启防火墙，需要开启防火墙：
systemctl start firewalld

# 查看是否开放端口9999：
firewall-cmd --list-ports

# 没有开放，则加入
firewall-cmd --permanent --zone=public --add-port=9999/tcp

# 重启防火墙
systemctl reload firewalld

# 再次查看是否开放
firewall-cmd --list-ports

访问jenkins地址 http://<ip或者域名>:9999

提示输入密码解锁

执行命令查看密码，将查出的密码复制粘贴到上图，并继续

cat /var/lib/jenkins/secrets/initialAdminPassword

选择安装推荐的插件

选择后，等待安装。

安装完成后创建用户名密码

实例配置，输入jenkins url，点保存并完成

至此，安装结束。