一个docker包，支持部署无数个环境。不再需要不同环境打不同的包。

[xzxiaoshan]

1、maven编译，不再需要为每个config环境都修改build.sh(bat)，只需要进行一次maven编译。一次docker打包。
2、原本需要再build.sh(bat)中配置的参数 portal 的数据库连接信息、config和admin的数据库连接信息、metaserver信息，都将不需要了。
3、这些信息，都提取到环境变量中来配置。不管你是普通部署还是docker部署，都可以通过环境变量来配置信息。
完全杜绝同环境不同包的问题。一次编译，多次运行！

下面是一个完全通过env配置的docker-compose.yml示例，包括了数据库和MetaServer的配置：

version: '3'
services:
  apollo-portal:
    image: docker.io/xzxiaoshan/apollo-portal:1.4.0
    container_name: apollo-portal
    network_mode: "host"
    environment: 
      SERVER_PORT: 5555
      # DataSource Info
      DS_URL: "jdbc:mysql://pro.shanhy.com:3306/ApolloPortalDB?characterEncoding=utf8"
      DS_USERNAME: "shanhy"
      DS_PASSWORD: "xzxiaoshan@123"
      # Environmental variable declaration (meta server url, different environments should have different meta server addresses)
      DEV_META: "http://dev.shanhy.com:6666"
      FAT_META: ""
      UAT_META: ""
      LPT_META: ""
      PRO_META: "http://pro.shanhy.com:6666"
    depends_on:
      - apollo-adminservice
    logging:
      driver: "json-file"
      options:
        max-size: "200k"
        max-file: "10"
        
  apollo-configservice:
    image: docker.io/xzxiaoshan/apollo-configservice:1.4.0
    container_name: apollo-configservice
    network_mode: "host"
    environment:
      SERVER_PORT: 6666
      # DataSource Info
      DS_URL: "jdbc:mysql://pro.shanhy.com:3306/ApolloConfigDB?characterEncoding=utf8"
      DS_USERNAME: "shanhy"
      DS_PASSWORD: "xzxiaoshan@123"
    logging:
      driver: "json-file"
      options:
        max-size: "200k"
        max-file: "10"
        
  apollo-adminservice:
    image: docker.io/xzxiaoshan/apollo-adminservice:1.4.0
    container_name: apollo-adminservice
    network_mode: "host"
    environment:
      SERVER_PORT: 6667
      # DataSource Info
      DS_URL: "jdbc:mysql://pro.shanhy.com:3306/ApolloConfigDB?characterEncoding=utf8"
      DS_USERNAME: "shanhy"
      DS_PASSWORD: "xzxiaoshan@123"
    depends_on:
      - apollo-configservice
    logging:
      driver: "json-file"
      options:
        max-size: "200k"
        max-file: "10"

[xzxiaoshan]

如果用户没有做任何配置，从使用角度来说其使用方法和结果与本次修改前一样。本次修改是一种完全兼容式修改。无任何副作用。

[xzxiaoshan]

示例 docker-compose.yml 中的dockerhub镜像，是基于1.4.0 tag+fork修改后（pull request是master），直接build打包的。未做任何二次配置。打包后直接docker-compose直接使用。也就是说，打包前0配置，打包后通过环境变量配置。

[nobodyiam]

代码有冲突，麻烦解决一下

[xzxiaoshan]

冲突已处理

[codecov-io]

Codecov Report

Merging #2343 into master will decrease coverage by 0.07%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2343      +/-   ##
============================================
- Coverage     50.05%   49.97%   -0.08%     
+ Complexity     1992     1990       -2     
============================================
  Files           404      404              
  Lines         12429    12429              
  Branches       1275     1275              
============================================
- Hits           6221     6212       -9     
- Misses         5765     5773       +8     
- Partials        443      444       +1

Impacted Files	Coverage Δ	Complexity Δ
...work/apollo/biz/message/DatabaseMessageSender.java	56.25% <0%> (-10.42%)	6% <0%> (-2%)
...mework/apollo/portal/component/PortalSettings.java	65.07% <0%> (-4.77%)	5% <0%> (ø)
.../apollo/internals/RemoteConfigLongPollService.java	79.01% <0%> (-0.62%)	27% <0%> (ø)

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[coveralls]

Coverage decreased (-0.06%) to 53.552% when pulling 03c2c00 on xzxiaoshan:dockerport into b84f5b3 on ctripcorp:master.

[nobodyiam]

LGTM