Jenkins是什么？

Jenkins是一个开源软件项目百，是基于Java开发的一种持续集成(CI)工具，用于监控持续重复的工作，旨在提供一个开放易用的软件平台，使软件的持续集成变成可能.

Jenkins用Java语言编写，可在Tomcat等流行的servlet容器中运行，也可以独立运行。通常与版本管理工具SVN、Git、Maven、Ant、Gradle搭配使用

Jenkins功能包括

1、持续的软件版本发布/测试项目。

2、监控外部调用执行的工作。

3、部署测试环境

4、跑定时任务(结合自动化测试工具使用)

部署jenkins

部署jenkins首要要有tomcat，tomcat又必须有Java环境，所以先安装java环境和tomcat

[root@localhost ~]# yum -y install java-17-openjdk*
[root@localhost ~]# wget https://get.jenkins.io/war-stable/2.303.2/jenkins.war //下载Jenkins的war包
[root@localhost ~]# wget https://archive.apache.org/dist/tomcat/tomcat-9/v9.0.54/bin/apache-tomcat-9.0.54.tar.gz //下载tomcat包
[root@localhost ~]# ls
anaconda-ks.cfg  apache-tomcat-9.0.54.tar.gz  jenkins.war
[root@localhost ~]# tar xf apache-tomcat-9.0.54.tar.gz -C /usr/local/
[root@localhost ~]# cd /usr/local/
[root@localhost local]# ls
apache-tomcat-9.0.54  bin  etc  games  include  lib  lib64  libexec  sbin  share  src
[root@localhost local]# mv apache-tomcat-9.0.54/ jenkins
[root@localhost local]# ls
bin  etc  games  include  jenkins  lib  lib64  libexec  sbin  share  src
[root@localhost local]# cd jenkins/
[root@localhost jenkins]# ls
bin           conf             lib      logs    README.md      RUNNING.txt  webapps
BUILDING.txt  CONTRIBUTING.md  LICENSE  NOTICE  RELEASE-NOTES  temp         work
[root@localhost jenkins]# systemctl disable --now firewalld
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@localhost jenkins]# vim /etc/selinux/config 
[root@localhost jenkins]# setenforce 0
[root@localhost jenkins]# ./bin/startup.sh  //启动
Using CATALINA_BASE:   /usr/local/jenkins
Using CATALINA_HOME:   /usr/local/jenkins
Using CATALINA_TMPDIR: /usr/local/jenkins/temp
Using JRE_HOME:        /usr
Using CLASSPATH:       /usr/local/jenkins/bin/bootstrap.jar:/usr/local/jenkins/bin/tomcat-juli.jar
Using CATALINA_OPTS:   
Tomcat started.
[root@localhost jenkins]# ss -antl
State     Recv-Q    Send-Q              Local Address:Port         Peer Address:Port    Process    
LISTEN    0         128                       0.0.0.0:22                0.0.0.0:*                  
LISTEN    0         128                          [::]:22                   [::]:*                  
LISTEN    0         1              [::ffff:127.0.0.1]:8005                    *:*                  
LISTEN    0         100                             *:8080                    *:*         
[root@localhost jenkins]# cd webapps/
[root@localhost webapps]# ls
docs  examples  host-manager  manager  ROOT
[root@localhost webapps]# rm -rf docs/ examples/ host-manager/ manager/ //因为这些包没用可以删除
[root@localhost webapps]# ls
ROOT
[root@localhost webapps]# cp ~/jenkins.war . //我们可以把Jenkins看作开发人员开发打包好的包
[root@localhost webapps]# ls
jenkins.war  ROOT

访问出现以下界面

//查看密码而后登录
[root@localhost webapps]# cat /root/.jenkins/secrets/initialAdminPassword
7d9e3cf886c3406d947d98be1490eeaf