Commit 0b2fc055 authored by Dmitriy Volkov's avatar Dmitriy Volkov

docs(ci/docker_build): Add example of variable use

parent 8a1441fb
......@@ -298,6 +298,30 @@ push to the Registry connected to your project. Its password is provided in the
`$CI_BUILD_TOKEN` variable. This allows you to automate building and deployment
of your Docker images.
You can also make use of [other variables](../variables/README.md) to avoid hardcoding:
```yaml
services:
- docker:dind
variables:
IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_BUILD_REF_NAME
before_script:
- docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN $CI_REGISTRY
build:
stage: build
script:
- docker build -t $IMAGE_TAG .
- docker push $IMAGE_TAG
```
Here, `$CI_REGISTRY_IMAGE` would be resolved to the address of the registry tied
to this project, and `$CI_BUILD_REF_NAME` would be resolved to the branch or
tag name for this particular job. We also declare our own variable, `$IMAGE_TAG`,
combining the two to save us some typing in the `script` section.
Here's a more elaborate example that splits up the tasks into 4 pipeline stages,
including two tests that run in parallel. The build is stored in the container
registry and used by subsequent stages, downloading the image
......
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