FIXED: Error during connect: Post http://docker:2375/v1.24/auth: dial tcp: lookup docker on 169.254.169.254:53: no such host

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Problem

When trying to use the Docker CLI in a GitLab pipeline job, the pipeline fails with the error:

error during connect: Post http://docker:2375/v1.24/auth: dial tcp: lookup docker on 169.254.169.254:53: no such host

This can be caused by several reasons but the most common reason is due to a missing Docker Service that needs to be run in the pipeline alongside the Docker CLI.

Solution

There is an extra service that needs to be added to the .gitlab-ci.yml which enables the GitLab CI to use the Docker CLI.

Add the service Docker Image. by adding this to your yml script:

  services:
    - docker:19.03.12-dind

Your overall .gitlab-ci.yml will now look like this and your GitLab pipeline should now work:

docker-push:
  stage: push
  image: docker:latest
  services:
    - docker:19.03.12-dind
  script:
    - docker login --username jaykc --password "$DOCKER_ACCESS_KEY"
    - docker build -t <<REPOSITORY ID>>/<<IMAGE NAME>>:1.0 .
    - docker push <<REPOSITORY ID>>/<<IMAGE NAME>>:1.0

References

https://docs.gitlab.com/ee/ci/yaml/#services

JakTech

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