Docker+Jenkins持续集成环境（2）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

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：

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。