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docker - GitLab CI：如何连接到 .gitlab-ci.yml 脚本中启动的 docker 容器？

问题描述

初始任务

在我的 GitLab CI 构建中，我想：

问题

.gitlab-ci.yml看起来像这样：

image: docker:stable

build/test:
  tags:
    - gradle
    - eu

  stage: test

# doesn't work with or without it
#  services:
#    - docker:dind

  script:
    # display local running containers
    - echo Displaying all running docker containers with "amazon/dynamodb-local" image...
    - docker ps --filter ancestor=amazon/dynamodb-local

    # stop all running docker containers with "amazon/dynamodb-local" image
    - echo Stopping all Docker containers with "amazon/dynamodb-local" image...
    - CONTAINERS=$(docker ps -q --filter ancestor=amazon/dynamodb-local)
    - >
      if [ "${CONTAINERS}" == "" ]; then
        echo No docker containers with "amazon/dynamodb-local" image running. Nothing to stop.
      else
        docker stop $(docker ps -q --filter ancestor=amazon/dynamodb-local)
        echo All Docker containers with "amazon/dynamodb-local" image stopped.
      fi

    # start DynamoDB local as a docker container with shared database
#    - java -Djava.library.path=./dynamodb_local_latest/DynamoDBLocal_lib -jar ./dynamodb_local_latest/DynamoDBLocal.jar -sharedDb
    # relative path to causes "Error: Unable to access jarfile" for both windows and linux
    # run Docker in detached mode to not hang on the opened console
    - cd ./dynamodb_local_latest
    - docker run --detach -p 8000:8000 amazon/dynamodb-local -jar DynamoDBLocal.jar -sharedDb
    - cd ./..

    # display local running containers
    - echo Displaying all running docker containers with "amazon/dynamodb-local" image...
    - docker ps --filter ancestor=amazon/dynamodb-local

    # see https://stackoverflow.com/questions/45389116/unable-to-access-docker-compose-containers-created-inside-docker
    # $DOCKER_HOST is unix:///var/run/docker.sock
    # http://localhost:8080 fails
    # http://docker:8000 fails
    # http://unix:///var/run/docker.sock:8000 fails
    - echo docker host is ${DOCKER_HOST}
    - cat /etc/hosts
#    - curl docker:80 | true
#    - curl docker:8000 | true
#    - curl http://docker:8000 | true
#    - curl http://docker:8000 | true
#    - curl ${DOCKER_HOST} | true
#    - curl ${DOCKER_HOST}:8000 | true
    - curl localhost:8000 | true
    - curl http://localhost:8000 | true

    # stop all running docker containers with "amazon/dynamodb-local" image
    - echo Stopping all Docker containers with "amazon/dynamodb-local" image...
    - CONTAINERS=$(docker ps -q --filter ancestor=amazon/dynamodb-local)
    - >
      if [ "${CONTAINERS}" == "" ]; then
        echo No docker containers with "amazon/dynamodb-local" image running. Nothing to stop.
      else
        docker stop $(docker ps -q --filter ancestor=amazon/dynamodb-local)
        echo All Docker containers with "amazon/dynamodb-local" image stopped.
      fi

    # display local running containers
    - echo Displaying all running docker containers with "amazon/dynamodb-local" image...
    - docker ps --filter ancestor=amazon/dynamodb-local

关键执行点（Gitlab-CI 日志）如下所示：

Docker 容器运行：

$ docker run --detach -p 8000:8000 amazon/dynamodb-local -jar DynamoDBLocal.jar -sharedDb
c823489c22fffa603c1ae1b91d898cb7de4964774d54a08c9fdf0b891c2243b4
$ echo Displaying all running docker containers with "amazon/dynamodb-local" image...
Displaying all running docker containers with amazon/dynamodb-local image...
$ docker ps --filter ancestor=amazon/dynamodb-local
CONTAINER ID        IMAGE                   COMMAND                  CREATED             STATUS                  PORTS                    NAMES
c823489c22ff        amazon/dynamodb-local   "java -jar DynamoDBL…"   1 second ago        Up Less than a second   0.0.0.0:8000->8000/tcp   peaceful_beaver

curl 失败（尝试了所有可能的变化，这只是一个例子）：

$ curl localhost:8000 | true
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (7) Failed to connect to localhost port 8000: Connection refused
Authenticating with credentials from $DOCKER_AUTH_CONFIG
ERROR: Job failed: exit code 7

我试过有无

  services:
    - docker:dind

尝试使用主机名localhostor docker，tcp://localhost带http://前缀或不带前缀，使用端口80，8000or 2375。没有任何效果。

的${DOCKER_HOST}值为unix:///var/run/docker.sock：

$ echo docker host is ${DOCKER_HOST}
docker host is unix:///var/run/docker.sock

/etc/hosts不包含别名docker

$ cat /etc/hosts
127.0.0.1   localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.3  runner-H3HL9s9t-project-913-concurrent-0

问题

链接

我用谷歌搜索了多个链接。那里的解决方案目前对我没有帮助。

标签： dockerdocker-composegitlab-cidocker-in-docker

解决方案

实际上没有必要用手册docker run/docker stop在-script节内编写如此复杂的解决方案。苗条和简单的方法是使用本地 DynamoDB 作为service.

使用此脚本，本地 DynamoDB 将可以通过元素的 url 访问alias，services即dynamodb-local对于本示例：

  services:
    - name: amazon/dynamodb-local
      alias: dynamodb-local

aws dynamodb使用http://dynamodb-local:8000端点 url执行有效：

  script:
    - DYNAMODB_LOCAL_URL=http://dynamodb-local:8000
    - apk add --no-cache curl jq python py-pip
    - pip install awscli
    - aws dynamodb list-tables --endpoint-url ${DYNAMODB_LOCAL_URL} --region eu-central-1

在这个很棒的答案中找到了这个选项。非常感谢@madhead提供它！

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