系统：Centos7.4
环境：jdk1.8.151, tomcat8.5.37,jenkins2.157
1，安装Jenkins
[root@localhost ~]# systemctl stop firewalld 先关闭防火墙
[root@localhost ~]#wget http://updates.jenkins-ci.org/download/war/2.157/jenkins.war
[root@localhost ~]#wget http://mirror-hk.koddos.net/apache/tomcat/tomcat-8/v8.5.37/bin/apache-tomcat-8.5.37.tar.gz
[root@localhost ~]# ll
总用量 83656
-rw-------. 1 root root 1257 2月 28 19:07 anaconda-ks.cfg
-rw-r--r--. 1 root root 9653382 12月 12 21:00 apache-tomcat-8.5.37.tar.gz
-rw-r--r--. 1 root root 76001412 1月 7 06:mkdir /data/app -p45 jenkins.war
[root@localhost ~]# mkdir /data/app -p
[root@localhost ~]# tar xf jdk-8u151-linux-x64.tar.gz -C /data/app/
[root@localhost ~]# mv /data/app/jdk1.8.0_151 /data/app/jdk
[root@localhost ~]# vim /etc/profile
export JAVA_HOME=/data/app/jdk
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
PATH=${JAVA_HOME}/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
[root@localhost ~]# . /etc/profile
[root@localhost ~]# java -version
java version "1.8.0_151"
Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)
[root@localhost ~]# tar xf apache-tomcat-8.5.37.tar.gz -C /data/app/
[root@localhost ~]# mv /data/app/apache-tomcat-8.5.37 /data/app/jenkins
[root@localhost ~]# rm -rf /data/app/jenkins/webapps/*
[root@localhost ~]# cp -rp jenkins.war /data/app/jenkins/webapps/
[root@localhost ~]# /data/app/jenkins/bin/startup.sh
Using CATALINA_BASE: /data/app/jenkins Using CATALINA_HOME: /data/app/jenkins Using CATALINA_TMPDIR: /data/app/jenkins/temp
Using JRE_HOME: /data/app/jdk/jre Using CLASSPATH: /data/app/jenkins/bin/bootstrap.jar:/data/app/jenkins/bin/tomcat-juli.jar Tomcat started.
[root@localhost ~]# netstat -tnlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1002/sshd
tcp6 0 0 :::8009 :::* LISTEN 41146/java
tcp6 0 0 :::8080 :::* LISTEN 41146/java
tcp6 0 0 :::22 :::* LISTEN 1002/sshd
Jenkins 启动完成, 开始 jenkins 图形界面的配置：
[root@localhost ~]# cat /root/.jenkins/secrets/initialAdminPassword
2696147a4c2b44c3b1cf42dfe5a290aa 这就是初始化Admin 密码
输入初始化 Admin 密码：
Install suggested plugins: 安装建议的插件
会自动安装一些建议的插件
安装好之后，会让你手动创建一个管理员账号：
点击Start using jenkins，开始使用 jenkins。
注意：jenkins 的不同版本，安装过程可能会有点差异。此版本是 jenkins 最新版本。
开始登陆 jenkins
输入刚刚新建的管理员账号密码登陆。(如果输入账号密码，点击登陆，出现空白页面, 请重启 jenkins 程序，再尝试登陆。)
2.配置Jenkins
2.1配置环境（安装ssh插件，配置ssh插件）
实现目标：通过Jenkins这台服务器。可以ssh远程到其他的任意节点服务器，执行脚本或者命令。
[root@localhost ~]# ssh-keygen -t rsa
Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Created directory '/root/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:zlXWGMoy3pA/878k1BlzQ00rI/2cQRj1hCVhMnSt1e4 root@master The key's randomart image is: +---[RSA 2048]----+
| .=.OX*|
| o ..X+oB|
| = o.+++Bo|
| . * o..*==|
| S * . o= |
| o . = E|
| o o . |
| + |
| o. | +----[SHA256]-----+
[root@localhost ~]# more .ssh/id_rsa
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----类型：ssh 用户名的私钥
username: root 用户
Private key：私钥
描述：jenkins(privite_key)
2.2 在 jenkins 服务上，通过 ssh-copy-id 对其他几点进行免秘钥配置.
面秘钥配置完成 可以正常登陆
3. 安装 ssh 插件并配置 ssh
系统管理--插件管理--搜索 ssh
配置ssh，系统管理--系统设置
配置 ssh remote hosts
点击新增
Hostname: 节点 ip
Port: 22
Credentials: jenkins 凭据
配置 publish over ssh
Name: 可以随意填写
Hostname: 节点 ip
Username: root
Remote directory: /
配置好之后，在最下方点击保存即可。
2.3 Demo 实例
需求：使用 jenkins 在 192.168.174.157节点服务器上运行脚本 /data/app/sh/test.sh
建议：可以先新建一个视图，所有任务都放在视图里面
我的视图新建视图
进入视图后，填写名称。点击保存
点击demo，点击创建新的任务
Jenins 这台机器会通过 ssh 去连接 192.168.174.157 这台机器，然后在执行 cd /data/app/sh && sh -x test.sh 命令。
以上是 jenkins 基本的配置