ramizpolic / concourse-dind

Docker in Docker Ubuntu container for Concourse CI

Concourse Docker-in-Docker

Docker in Docker Ubuntu container for Concourse CI. Optimized for use with Concourse CI. Images are published under ghcr.io/ramizpolic/concourse-dind which includes Docker, Docker Compose, and Docker Squash.

Features

• Automatically starts docker.
• Uses errexit, pipefail, and nounset.
• Configures timeout (DOCKERD_TIMEOUT) on dockerd start to account for misconfiguration (docker log will be output).
• Accepts arbitrary dockerd arguments via optional DOCKER_OPTS environment variable.
• Passes through --garden-mtu from the parent Gardian container if --mtu is not specified in DOCKER_OPTS.
• Sets --data-root /scratch/docker to bypass the graph filesystem if --data-root is not specified in DOCKER_OPTS.

Run & Build

The image is available on DockerHub, but if you would like to build locally, clone and run

docker run ghcr.io/ramizpolic/concourse-dind

Example

Here is an example of a Concourse job to run a several containers in a task, and then runs the integration test suite.

jobs:
- name: integration
  plan:
  - get: code
    params:
      depth: 1
    passed:
    - unit-tests
    trigger: true
  - task: integration-tests
    privileged: true
    config:
      platform: linux
      image_resource:
        type: docker-image
        source:
          repository: ghcr.io/ramizpolic/concourse-dind
      inputs:
      - name: code
      run:
        args:
        - bash
        - -ceux
        - |
          docker-compose -f code/example/integration.yml run tests
          docker-compose -f code/example/integration.yml down
          docker volume rm $(docker volume ls -q)