使用docker+jenkins构建nodejs前端项目
前文使用Docker搭建Jenkins+Docker持续集成环境我们已经搭建了基于docker+jenkins的持续集成环境，并构建了基于maven的项目。这一节，我们继续扩展功能，增加对Nodejs的支持,实现nodejs项目构建、并打包成docker镜像和自动部署。
1. 配置Nodejs环境
1.1 安装nodejs插件
打开系统管理——管理插件——可选插件，搜索NodeJS，选择NodeJS Plugin安装
1.2 配置nodejs 版本
系统管理 —— 全局工具配置 —— NodeJS，选择安装nodejs，选择当前最新版本9.4，命名NodeJS 9.4。
2. 配置项目
2.1 新建项目
新建jenkins项目，选择自由项目，按前文说明配置好SVN、触发器。
在构建环境里，选择Provide Node & npm bin/ folder to PATH，选择我们配置的9.4版本nodejs
2.2 配置构建命令
一般是通过npm命令构建，我们选择增加构建步骤 —— Excute shell，输入构建命令：
alias cnpm="npm --registry=https://registry.npm.taobao.org \
--cache=$HOME/.npm/.cache/cnpm \
--disturl=https://npm.taobao.org/dist \
--userconfig=$HOME/.cnpmrc"
cnpm install
cnpm run build
注意，这里为了构建更快，选择通过alias增加cnpm指令，指定使用淘宝的仓库。
2.3 构建docker镜像
由于我们构建出来的已经是可访问的资源了，放在dis目录，所以我们可以基于nginx作为基础镜像。
编写DockerFile：
FROM nginx
ADD ./dist /usr/share/nginx/html
EXPOSE 80
然后，增加构建步骤，ADD build/publish docker image
设置image：192.168.86.8:5000/allinone-web-cicd
勾上push image，会自动push到192.168.86.8:5000仓库
enter description here
2.4 自动部署镜像
和上文一样，这里继续使用ssh实现docker镜像部署。
增加构建步骤，Execute shell script on remote host using ssh：
选择docker swarm的manager机器，输入命令：
docker service rm allinone-web-cicd
docker service create --name allinone-web-cicd --replicas 1 --publish 10081:80 192.168.86.8:5000/allinone-web-cicd
这次，我们使用docker service来实现部署，先service rm掉老服务，然后create新服务。
3.测试构建
点击立即构建：
enter description here
稍等片刻，就构建成功了；
[SSH] executing...
allinone-web-cicd
mj9dwq00ath03i05b8bfe5plx
overall progress: 0 out of 1 tasks
1/1:
overall progress: 0 out of 1 tasks
overall progress: 0 out of 1 tasks
overall progress: 0 out of 1 tasks
overall progress: 0 out of 1 tasks
overall progress: 0 out of 1 tasks
overall progress: 0 out of 1 tasks
overall progress: 1 out of 1 tasks
verify: Waiting 5 seconds to verify that tasks are stable...
verify: Waiting 5 seconds to verify that tasks are stable...
verify: Waiting 5 seconds to verify that tasks are stable...
verify: Waiting 5 seconds to verify that tasks are stable...
verify: Waiting 5 seconds to verify that tasks are stable...
verify: Waiting 4 seconds to verify that tasks are stable...
verify: Waiting 4 seconds to verify that tasks are stable...
verify: Waiting 4 seconds to verify that tasks are stable...
verify: Waiting 4 seconds to verify that tasks are stable...
verify: Waiting 4 seconds to verify that tasks are stable...
verify: Waiting 3 seconds to verify that tasks are stable...
verify: Waiting 3 seconds to verify that tasks are stable...
verify: Waiting 3 seconds to verify that tasks are stable...
verify: Waiting 3 seconds to verify that tasks are stable...
verify: Waiting 3 seconds to verify that tasks are stable...
verify: Waiting 2 seconds to verify that tasks are stable...
verify: Waiting 2 seconds to verify that tasks are stable...
verify: Waiting 2 seconds to verify that tasks are stable...
verify: Waiting 2 seconds to verify that tasks are stable...
verify: Waiting 2 seconds to verify that tasks are stable...
verify: Waiting 1 seconds to verify that tasks are stable...
verify: Waiting 1 seconds to verify that tasks are stable...
verify: Waiting 1 seconds to verify that tasks are stable...
verify: Waiting 1 seconds to verify that tasks are stable...
verify: Waiting 1 seconds to verify that tasks are stable...
verify: Service converged
[SSH] completed
[SSH] exit-status: 0
Finished: SUCCESS
这个时候，访问swarm集群的任一http://ip:10081，就可以看到效果了。
作者：Jadepeng
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