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diff --git a/doc/ci/yaml/README.md b/doc/ci/yaml/README.md index 4b2a6ccc7e4..d4740273784 100644 --- a/doc/ci/yaml/README.md +++ b/doc/ci/yaml/README.md @@ -1836,6 +1836,42 @@ variables: You can set it globally or per-job in the [`variables`](#variables) section. +### Docker Strategy + +> [Introduced](https://gitlab.com/gitlab-org/gitlab-runner/issues/3605) in GitLab 11.4. + +You can set the `DOCKER_STRATEGY` either globally or per-job in +[`variables`](#variables) section. If left unspecified, the default is +`attach` which is the same behavior pre 11.4. + +`DOCKER_STRATEGY` defines the behavior of how the runner handle the build +containers. + +`attach` is the default option, and follow the same behavior that the runner +has been using. A container is started with the build script as the main +process and exists as soon as the script is done. + +```yaml +variables: + DOCKER_STRATEGY: attach +``` + +`exec` is the new workflow the runner follows to handle the build container, +which tries to mimic the same way our [kubernetes +executor](https://docs.gitlab.com/runner/executors/kubernetes.html) work. +Meaning the build container is started in [detached +mode](https://docs.docker.com/engine/reference/run/#detached--d) that invokes +a shell. This allows the container to keep running until stopped/killed as +the end of the stage. The build script is then executed using the `exec` +functionality. Doing so will allow the runner to access the container even +after the build script has started, such as [interactive web +terminals][debugging-running-job]. + +```yaml +variables: + DOCKER_STRATEGY: exec +``` + ## Special YAML features It's possible to use special YAML features like anchors (`&`), aliases (`*`) @@ -2032,4 +2068,5 @@ CI with various languages. [schedules]: ../../user/project/pipelines/schedules.md [variables-expressions]: ../variables/README.md#variables-expressions [ee]: https://about.gitlab.com/gitlab-ee/ -[gitlab-versions]: https://about.gitlab.com/products/
\ No newline at end of file +[gitlab-versions]: https://about.gitlab.com/products/ +[debugging-running-job]: ../interactive_web_terminal/index.md#debugging-a-running-job |