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# Pipeline Schedules

> **Notes**:
- This feature was introduced in 9.1 as [Trigger Schedule][ce-10533].
- In 9.2, the feature was [renamed to Pipeline Schedule][ce-10853].
- Cron notation is parsed by [Rufus-Scheduler](https://github.com/jmettraux/rufus-scheduler).

Pipeline schedules can be used to run pipelines only once, or for example every
month on the 22nd for a certain branch.

## Using Pipeline schedules

In order to schedule a pipeline:

1. Navigate to your project's **Pipelines ➔ Schedules** and click the
   **New Schedule** button.
1. Fill in the form
1. Hit **Save pipeline schedule** for the changes to take effect.

![New Schedule Form](img/pipeline_schedules_new_form.png)

>**Attention:**
The pipelines won't be executed precisely, because schedules are handled by
Sidekiq, which runs according to its interval.
See [advanced admin configuration](#advanced-admin-configuration) for more
information.

In the **Schedules** index page you can see a list of the pipelines that are
scheduled to run. The next run is automatically calculated by the server GitLab
is installed on.

![Schedules list](img/pipeline_schedules_list.png)

## Taking ownership

Pipelines are executed as a user, who owns a schedule. This influences what
projects and other resources the pipeline has access to. If a user does not own
a pipeline, you can take ownership by clicking the **Take ownership** button.
The next time a pipeline is scheduled, your credentials will be used.

![Schedules list](img/pipeline_schedules_ownership.png)

>**Note:**
When the owner of the schedule doesn't have the ability to create pipelines
anymore, due to e.g., being blocked or removed from the project, the schedule
is deactivated. Another user can take ownership and activate it, so the
schedule can be run again.

## Advanced admin configuration

The pipelines won't be executed precisely, because schedules are handled by
Sidekiq, which runs according to its interval. For example, if you set a
schedule to create a pipeline every minute (`* * * * *`) and the Sidekiq worker
runs on 00:00 and 12:00 every day (`0 */12 * * *`), only 2 pipelines will be
created per day. To change the Sidekiq worker's frequency, you have to edit the
`pipeline_schedule_worker_cron` value in your `gitlab.rb` and restart GitLab.
For GitLab.com, you can check the [dedicated settings page][settings]. If you
don't have admin access to the server, ask your administrator.

[ce-10533]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10533
[ce-10853]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10853
[settings]: https://about.gitlab.com/gitlab-com/settings/#cron-jobs