netresearch/dcind

dcind（Docker-Compose-in-Docker）

使用此Dockerfile构建Concourse CI集成测试的基础镜像，也可直接使用Docker Hub上的现成镜像：https://hub.docker.com/r/netresearch/dcind/%E3%80%82%E8%AF%A5%E9%95%9C%E5%83%8F%E5%9F%BA%E4%BA%8EAlpine%E7%B3%BB%E7%BB%9F%E3%80%82

以下是Concourse job示例，展示如何用netresearch/dcind镜像在任务中运行多容器并执行集成测试套件，完整示例可在example目录找到：

yaml
  - name: integration
    plan:
      - aggregate:
        - get: code
          params: {depth: 1}
          passed: [unit-tests]
          trigger: true
        - get: redis
          params: {save: true}
        - get: busybox
          params: {save: true}
      - task: Run integration tests
        privileged: true
        config:
          platform: linux
          image_resource:
            type: docker-image
            source:
              repository: netresearch/dcind
          inputs:
            - name: code
            - name: redis
            - name: busybox
          run:
            path: sh
            args:
              - -exc
              - |
                source /docker-lib.sh
                start_docker

                # 严格来说预加载镜像非必需，但以下场景建议使用：
                # - 镜像来自私有仓库时，让Concourse拉取后传递给任务更便捷；
                # - 镜像传递给任务时，Concourse可从缓存获取，提升效率。
                docker load -i redis/image
                docker tag "$(cat redis/image-id)" "$(cat redis/repository):$(cat redis/tag)"

                docker load -i busybox/image
                docker tag "$(cat busybox/image-id)" "$(cat busybox/repository):$(cat busybox/tag)"

                message info This is just to visually check in the log that images have been loaded successfully
                docker images

                message Run the container with tests and its dependencies.
                docker-compose -f code/example/integration.yml run tests

                message header Cleanup.
                message info Not sure if this is required. It's quite possible that Concourse is smart enough to clean up the Docker mess itself.
                docker-compose -f code/example/integration.yml down
                docker volume rm $(docker volume ls -q)

包含的工具

消息工具（Messages）

为优化日志可读性，镜像提供CLI彩色输出命令：

bash
message info "简短信息提示"

message header "带分隔线的大标题"

message error 418 "带退出码的错误信息"

message warn "出现问题时使用"

message ok "成功流程时使用"

message code "<example>我的示例代码</example>"