GitLab Runner Maven Docker环境的应用

背景

Maven可作为Java的构建环境，当Maven构建打包时，在本地会创建一个本地仓库存放所以的依赖包，Runner运行在Docker中时，仓库地址是在Docker容器中，当Docker容器重启时则创建一个新的容器，原Docker中下载好的Maven依赖包全部都会丢失，所以我们将容器中的仓库地址映射到宿主机上避免上述情况反生。

Maven仓库映射到宿主机

GitLab Runner运行之后在config目录下会生成config.toml文件，修改文件里的volumes属性字段，将Docker里Maven仓库地址映射到宿主机上，如下：

concurrent = 1
check_interval = 0

[session_server]
  session_timeout = 1800

[[runners]]
  name = "my-runner"
  url = "http://xxx.xxx.xxx.xxx/"
  token = "xxxxxxxxx-"
  executor = "docker"
  [runners.custom_build_dir]
  [runners.docker]
    tls_verify = false
    image = "maven:3-jdk-8"
    privileged = false
    disable_entrypoint_overwrite = false
    oom_kill_disable = false
    disable_cache = false
    volumes = ["/cache","/data/maven/repository/:/root/.m2/repository:rw","/data/maven:/usr/share/maven:rw"]
    shm_size = 0
  [runners.cache]
    [runners.cache.s3]
    [runners.cache.gcs]

在配置中/data/maven/repository/:/root/.m2/repository:rw将Docker容器中仓库地址/root/.m2/repository映射到宿主机的/data/maven/repository/的目录。

/data/maven:/usr/share/maven:rw将Maven环境映射到宿主机上。

Maven上传包到远程仓库

Maven需要修改setting.xml文件，如下：

<?xml version="1.0" encoding="UTF-8"?>

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">

  <localRepository>F:\work\maven_repo</localRepository>
  
  <pluginGroups>
  </pluginGroups>

  <proxies>
  </proxies>

  <servers>
	<server>
      <id>nexus</id>
      <username>repo</username>
      <password>123456</password>
    </server>
	
    <!-- id与pom.xml关联的私服id相同 -->
	<server>
      <id>nexus-releases</id>
      <username>repo</username>
      <password>123456</password>
    </server>
	
	<server>
      <id>nexus-snapshots</id>
      <username>repo</username>
      <password>123456</password>
    </server>
	
  </servers>

  <mirrors>
	<mirror>
      <id>nexus</id>
      <mirrorOf>*</mirrorOf>
      <name>Human Readable Name for this Mirror.</name>
      <url>http://182.61.31.101:8081/repository/maven-public/</url>
    </mirror>
  </mirrors>

  <profiles>   
  </profiles>

</settings>

如果自己工程编译成jar后需要上传到Maven私服需要在pom.xml中添加如下配置：

<distributionManagement>
        <repository>
            <!-- id与maven settings.xml中设置权限的id相同 -->
            <id>nexus-releases</id>
            <name>Internal Releases</name>
            <url>http://182.61.31.101:8081/repository/maven-releases/</url>
        </repository>
        <snapshotRepository>
            <id>nexus-snapshots</id>
            <name>Internal Snapshots</name>
            <url>http://182.61.31.101:8081/repository/maven-snapshots/</url>
        </snapshotRepository>
    </distributionManagement>

其中repository和snapshotRepository中的id值需要与setting.xml中server的id一致，否则会出现权限认证错误

打包镜像并上传到远程镜像仓库