Merge branch 'patch-15' into 'master'
docs: add docker-in-docker from registry example See merge request gitlab-org/gitlab-ce!31101
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commit
cc3c1a66dd
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@ -575,6 +575,42 @@ For private and internal projects:
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docker login -u $CI_DEPLOY_USER -p $CI_DEPLOY_PASSWORD $CI_REGISTRY
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```
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### Using docker-in-docker image from Container Registry
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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:
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1. Update the `image` and `service` to point to your registry.
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1. Add a service [alias](https://docs.gitlab.com/ee/ci/yaml/#servicesalias)
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Below is an example of how your `.gitlab-ci.yml` should look like, assuming you have it configured with [TLS enabled](#tls-enabled):
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```yaml
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build:
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image: $CI_REGISTRY/group/project/docker:19.03.1
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services:
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- name: $CI_REGISTRY/group/project/docker:19.03.1-dind
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alias: docker
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variables:
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# Specify to Docker where to create the certificates, Docker will
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# create them automatically on boot, and will create
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# `/certs/client` that will be shared between the service and
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# build container.
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DOCKER_TLS_CERTDIR: "/certs"
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DOCKER_DRIVER: overlay2
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stage: build
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script:
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- docker build -t my-docker-image .
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- docker run my-docker-image /script/to/run/tests
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```
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If you forget to set the service alias the `docker:19.03.1` image won't find the
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`dind` service, and an error like the following is thrown:
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```sh
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$ docker info
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error during connect: Get http://docker:2376/v1.39/info: dial tcp: lookup docker on 192.168.0.1:53: no such host
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```
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### Container Registry examples
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If you're using docker-in-docker on your Runners, this is how your `.gitlab-ci.yml`
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