Centos下jenkins的安装

非docker安装

通过设置jenkins官方repo仓库下载

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
yum install jenkins
cat /etc/rc.d/init.d/jenkins

安装后，jenkins.war默认地址为
JENKINS_WAR=”/usr/lib/jenkins/jenkins.war”

jenkins的config地址为
JENKINS_CONFIG=/etc/sysconfig/jenkins

jenkins服务的启动/停止/重启脚本为
/etc/init.d/jenkins

下载rpm安装

wget https://pkg.jenkins.io/redhat-stable/jenkins-2.176.1-1.1.noarch.rpm
rpm -ivh jenkins-2.176.1-1.1.noarch.rpm

下载war包

wget https://mirrors.huaweicloud.com/jenkins/war-stable/latest/jenkins.war
#wget http://mirrors.jenkins.io/war-stable/latest/jenkins.war
java -jar jenkins.war

常用的启动参数为:

java -Duser.timezone=GMT+08 \
 -Djava.util.logging.config.file=/var/jenkins_home/jenkins.logging.properties \
 -Dgroovy.grape.report.downloads=true -Divy.message.logger.level=4 \
 -Dhudson.model.ParametersAction.keepUndefinedParameters=true \
 -Dhudson.security.ArtifactsPermission=true -Djava.awt.headless=true \
 -Dorg.apache.commons.jelly.tags.fmt.timeZone=Asia/Shanghai \
 -Dfile.encoding=UTF-8 -Dsun.jnu.encoding=UTF-8 \
 -Dhudson.slaves.NodeProvisioner.MARGIN=50 \
 -Dhudson.slaves.NodeProvisioner.MARGIN0=0.85 \
 -Dhudson.slaves.NodeProvisioner.initialDelay=0 \
 -Dhudson.slaves.NodeProvisioner.recurrencePeriod=2 \
 -Dhudson.model.LoadStatistics.clock=2 \
 -Dhudson.model.LoadStatistics.decay=0.1 \
 -Dpermissive-script-security.enabled=true \
 -server -Xms10g -Xmx32g -XX:MaxPermSize=4g -XX:+HeapDumpOnOutOfMemoryError \
 -Xloggc:/var/jenkins_home/jenkins_gc.log \
 -DJENKINS_HOME=/var/jenkins_home \
 -jar jenkins.war --logfile=/var/jenkins_home/jenkins.log

jenkins.logging.properties 的内容参见说明
permissive-script-security.enabled=true表示默认允许执行unsecured脚本，不再提示需要审核

虚拟机中启动jenkins后不能访问

1. 关闭防火墙

   systemctl status firewalld
   systemctl stop firewalld
   systemctl disable firewalld

2. 配置防火墙开放jinkins使用的端口

   # 检查当前防火墙开放的端口
   [root@localhost ~]# firewall-cmd  --list-ports
   
   # 配置防火墙开放端口
   [root@localhost ~]# firewall-cmd --permanent --zone=public --add-port=8080/tcp
   success
   [root@localhost ~]# firewall-cmd  --list-ports
   
   # 重启防火墙
   [root@localhost ~]# systemctl reload firewalld
   [root@localhost ~]# firewall-cmd  --list-ports
   8080/tcp

docker安装

docker hub中有两种jenkins的镜像，jenkins官方推荐使用 jenkinsci/blueocean 镜像，该镜像中包含了blueocean插件，该镜像会在blueocean发布新版本时同步发布。还有一个镜像 jenkins/jenkins, 为jenkins的纯净版本。

jenkins/jenkins的github地址

容器化安装时，支持配置下面三个环境变量，来定义jenkins的配置

• JAVA_OPTS

• JENKINS_HOME

• JENKINS_OPTS

• JENKINS_SLAVE_AGENT_PORT

docker run \
  --restart=always \
  -d \
  -p 80:8080 \
  -p 31281:31281 \
  -e JENKINS_SLAVE_AGENT_PORT=31281 \
  -e JENKINS_HOME="/var/jenkins_home" \
  -e JAVA_OPTS="-Duser.timezone=GMT+08 -Dgroovy.grape.report.downloads=true -Divy.message.logger.level=4 -Djava.util.logging.config.file=/var/jenkins_home/jenkins.logging.properties -Dhudson.model.ParametersAction.keepUndefinedParameters=true -Dhudson.security.ArtifactsPermission=true -Djava.awt.headless=true -Dorg.apache.commons.jelly.tags.fmt.timeZone=Asia/Shanghai -Dfile.encoding=UTF-8 -Dsun.jnu.encoding=UTF-8 -Dhudson.slaves.NodeProvisioner.MARGIN=50 -Dhudson.slaves.NodeProvisioner.MARGIN0=0.85 -Dhudson.slaves.NodeProvisioner.initialDelay=0 -Dhudson.slaves.NodeProvisioner.recurrencePeriod=2 -Dhudson.model.LoadStatistics.clock=2 -Dhudson.model.LoadStatistics.decay=0.1 -server -Xms10g -Xmx32g -XX:MaxPermSize=4g -XX:+HeapDumpOnOutOfMemoryError -Xloggc:/var/jenkins_home/jenkins_gc.log" \
  -e JENKINS_OPTS="--logfile=/var/jenkins_home/logs/jenkins.log" \
  -v /data/jenkins_home:/var/jenkins_home \
  -v /var/run/docker.sock:/var/run/docker.sock \
  jenkins/jenkins

jenkins.logging.properties 的内容参见说明

docker运行jenkins时提示权限错误

touch: cannot touch ‘/var/jenkins_home/copy_reference_file.log’: Permission denied
Can not write to /var/jenkins_home/copy_reference_file.log. Wrong volume permissions?

因为容器启动时默认采用jenkins用户，uid和gid分别时 1000 和 1000，需要将挂载到容器里面的JENKINS_HOME对应的宿主机上的目录的所有者修改下

chown -R 1000:1000 /data/jenkins_home