Commit 17e90416 authored by Shinya Maeda's avatar Shinya Maeda Committed by Ash McKenzie

Docs for Ci Resource Group

This commit adds docs for Ci resource group
parent 1f6f0606
......@@ -481,7 +481,7 @@ module Ci
end
def requires_resource?
Feature.enabled?(:ci_resource_group, project) &&
Feature.enabled?(:ci_resource_group, project, default_enabled: true) &&
self.resource_group_id.present?
end
......
---
title: Add 'resource_group' keyword to .gitlab-ci.yml for pipeline job concurrency
limitation
merge_request: 21617
author:
type: added
......@@ -119,6 +119,7 @@ The following table lists available parameters for jobs:
| [`pages`](#pages) | Upload the result of a job to use with GitLab Pages. |
| [`variables`](#variables) | Define job variables on a job level. |
| [`interruptible`](#interruptible) | Defines if a job can be canceled when made redundant by a newer run. |
| [`resource_group`](#resource_group) | Limit job concurrency. |
NOTE: **Note:**
Parameters `types` and `type` are [deprecated](#deprecated-parameters).
......@@ -2634,6 +2635,39 @@ In the example above, a new pipeline run will cause an existing running pipeline
NOTE: **Note:**
Once an uninterruptible job is running, the pipeline will never be canceled, regardless of the final job's state.
### `resource_group`
> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/15536) in GitLab 12.7.
Sometimes running multiples jobs or pipelines at the same time in an environment
can lead to errors during the deployment.
To avoid these errors, the `resource_group` attribute can be used to ensure that
the Runner will not run certain jobs simultaneously.
When the `resource_group` key is defined in a job in `.gitlab-ci.yml`,
job runs are mutually exclusive across different pipelines in the same project.
If multiple jobs belonging to the same resource group are enqueued simultaneously,
only one of them will be picked by the Runner, and the other jobs will wait until the
`resource_group` is free.
Here is a simple example:
```yaml
deploy-to-production:
script: deploy
resource_group: production
```
In this case, if a `deploy-to-production` job is running in a pipeline, and a new
`deploy-to-production` job is created in a different pipeline, it will not run until
the currently running/pending `deploy-to-production` job is finished. As a result,
you can ensure that concurrent deployments will never happen to the production environment.
There can be multiple `resource_group`s defined per environment. A good use case for this
is when deploying to physical devices. You may have more than one phyisical device, and each
one can be deployed to, but there can be only one deployment per device at any given time.
### `include`
> - Introduced in [GitLab Premium](https://about.gitlab.com/pricing/) 10.5.
......
......@@ -16,7 +16,7 @@ module Gitlab
end
def to_resource
return unless Feature.enabled?(:ci_resource_group, build.project)
return unless Feature.enabled?(:ci_resource_group, build.project, default_enabled: true)
return unless resource_group_key.present?
resource_group = build.project.resource_groups
......
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