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Diffstat (limited to 'doc/ci/docker/using_docker_build.md')
| -rw-r--r-- | doc/ci/docker/using_docker_build.md | 36 |
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diff --git a/doc/ci/docker/using_docker_build.md b/doc/ci/docker/using_docker_build.md index 2cbad5f101c..7c173970324 100644 --- a/doc/ci/docker/using_docker_build.md +++ b/doc/ci/docker/using_docker_build.md @@ -575,6 +575,42 @@ For private and internal projects: docker login -u $CI_DEPLOY_USER -p $CI_DEPLOY_PASSWORD $CI_REGISTRY ``` +### Using docker-in-docker image from Container Registry + +If you want to use your own Docker images for docker-in-docker there are a few things you need to do in addition to the steps in the [docker-in-docker](#use-docker-in-docker-workflow-with-docker-executor) section: + +1. Update the `image` and `service` to point to your registry. +1. Add a service [alias](https://docs.gitlab.com/ee/ci/yaml/#servicesalias) + +Below is an example of how your `.gitlab-ci.yml` should look like, assuming you have it configured with [TLS enabled](#tls-enabled): + +```yaml + build: + image: $CI_REGISTRY/group/project/docker:19.03.1 + services: + - name: $CI_REGISTRY/group/project/docker:19.03.1-dind + alias: docker + variables: + # Specify to Docker where to create the certificates, Docker will + # create them automatically on boot, and will create + # `/certs/client` that will be shared between the service and + # build container. + DOCKER_TLS_CERTDIR: "/certs" + DOCKER_DRIVER: overlay2 + stage: build + script: + - docker build -t my-docker-image . + - docker run my-docker-image /script/to/run/tests +``` + +If you forget to set the service alias the `docker:19.03.1` image won't find the +`dind` service, and an error like the following is thrown: + +```sh +$ docker info +error during connect: Get http://docker:2376/v1.39/info: dial tcp: lookup docker on 192.168.0.1:53: no such host +``` + ### Container Registry examples If you're using docker-in-docker on your Runners, this is how your `.gitlab-ci.yml` |