jenkins(1)-初见
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---
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title: jenkins(1)-初见
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date: 2018-11-7 10:08:13
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categories:
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- Java
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tags:
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- 持续集成
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---
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Jenkins是一款由Java编写的开源的**持续集成**工具
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持续集成是用于解决频繁迭代带来的运维方面的工作, 使这些工作可以使用脚本自动完成
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包括拉取代码更新、编译打包、部署运行等
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<!-- more -->
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### 环境搭建
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#### 使用war包
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可以从[官网](https://jenkins.io/)下载war包
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执行
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```bash
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java -jar jenkins.war
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```
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默认在8080端口运行
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运行之后访问可以进行初始化操作
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输入首次运行时生成的初始化密码
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之后安装推荐插件, 设定管理员用户名和密码, 即可开始使用
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#### 使用Docker镜像
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```bash
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# 拉取镜像
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docker pull jenkins/jenkins:lts
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# 运行容器
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docker run -d -p 8080:8080 --name jenkins jenkins/jenkins:lts
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```
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之后`docker logs [containerId]`查看容器的运行日志可以看到初始化密码
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初始化的操作同上
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### 创建远程节点
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初始化完毕之后, 已经有一个默认节点, 是jenkins程序运行所在的主机
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如果要对其他主机进行远程操作, 则需要创建节点
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系统管理 → 节点管理 → 新建节点
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配置新节点的信息
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这里使用SSH连接, 并且设定用户名和密码
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### 创建任务
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首页点击`新建任务`
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勾选**限制项目的运行节点**, 并且输入刚才创建的节点名称
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源码管理当中设定远程仓库的地址
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(如果是私有仓库需要设置凭据)
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编写构建shell
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```bash
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# BUILD_ID设定后可以保持server进程持续运行
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BUILD_ID=DONTKILLME
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export TOMCAT_PATH=/root/apache-tomcat-9.0.12
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bash /root/deploy.sh
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```
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### 编写deploy.sh
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```bash
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#!/bin/bash
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#编译+部署
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# 输入你的环境上tomcat的全路径
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# export TOMCAT_PATH=tomcat在部署机器上的路径
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### base 函数
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killTomcat()
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{
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pid=`ps -ef|grep tomcat|grep java|awk '{print $2}'`
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echo "tomcat Id list :$pid"
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if [ "$pid" = "" ]
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then
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echo "no tomcat pid alive"
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else
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kill -9 $pid
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fi
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}
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mvn clean package
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# 停tomcat进程
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killTomcat
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# 删除原有工程
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rm -rf $TOMCAT_PATH/webapps/ROOT
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rm -f $TOMCAT_PATH/webapps/ROOT.war
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rm -f $TOMCAT_PATH/webapps/order.war
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# 复制新的工程
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cp ./target/order.war $TOMCAT_PATH/webapps/
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# 重命名
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mv $TOMCAT_PATH/webapps/order.war $TOMCAT_PATH/webapps/ROOT.war
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# 启动Tomcat
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sh $TOMCAT_PATH/bin/startup.sh
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```
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之后执行`立即构建`
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