Move the CI/CD instance settings to admin pages

doc/administration/cicd.md

+---
+stage: Verify
+group: Pipeline Execution
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
+type: howto
+---
+
+# GitLab CI/CD instance configuration **(FREE SELF)**
+
+GitLab CI/CD is enabled by default in all new projects on an instance. You can configure
+the instance to have [GitLab CI/CD disabled by default](#disable-gitlab-cicd-in-new-projects)
+in new projects.
+
+You can still choose to [enable GitLab CI/CD in individual projects](../ci/enable_or_disable_ci.md#enable-cicd-in-a-project)
+at any time.
+
+## Disable GitLab CI/CD in new projects
+
+You can set GitLab CI/CD to be disabled by default in all new projects by modifying the settings in:
+
+- `gitlab.yml` for source installations.
+- `gitlab.rb` for Omnibus GitLab installations.
+
+Existing projects that already had CI/CD enabled are unchanged. Also, this setting only changes
+the project default, so project owners can still enable CI/CD in the project settings.
+
+For installations from source:
+
+1. Open `gitlab.yml` with your editor and set `builds` to `false`:
+
+   ```yaml
+   ## Default project features settings
+   default_projects_features:
+     issues: true
+     merge_requests: true
+     wiki: true
+     snippets: false
+     builds: false
+   ```
+
+1. Save the `gitlab.yml` file.
+
+1. Restart GitLab:
+
+   ```shell
+   sudo service gitlab restart
+   ```
+
+For Omnibus GitLab installations:
+
+1. Edit `/etc/gitlab/gitlab.rb` and add this line:
+
+   ```ruby
+   gitlab_rails['gitlab_default_projects_features_builds'] = false
+   ```
+
+1. Save the `/etc/gitlab/gitlab.rb` file.
+
+1. Reconfigure GitLab:
+
+   ```shell
+   sudo gitlab-ctl reconfigure
+   ```
+
+<!-- ## Troubleshooting
+
+Include any troubleshooting steps that you can foresee. If you know beforehand what issues
+one might have when setting this up, or when something is changed, or on upgrading, it's
+important to describe those, too. Think of things that may go wrong and include them here.
+This is important to minimize requests for support, and to avoid doc comments with
+questions that you know someone might ask.
+
+Each scenario can be a third-level heading, e.g. `### Getting error message X`.
+If you have none to add when creating a doc, leave this section in place
+but commented out to help encourage others to add to it in the future. -->

doc/administration/index.md

@@ -164,16 +164,16 @@ Learn how to install, configure, update, and maintain your GitLab instance.
 - [Limit repository size](../user/admin_area/settings/account_and_limit_settings.md): Set a hard limit for your repositories' size.
 - [Static objects external storage](static_objects_external_storage.md): Set external storage for static objects in a repository.
 
-## Continuous Integration settings
+## CI/CD settings
 
-- [Enable/disable GitLab CI/CD](../ci/enable_or_disable_ci.md#make-gitlab-cicd-disabled-by-default-in-new-projects): Enable or disable GitLab CI/CD for your instance.
+- [Enable or disable GitLab CI/CD](cicd.md#disable-gitlab-cicd-in-new-projects): Set new projects in your instance to have GitLab CI/CD enabled or disabled by default.
 - [GitLab CI/CD administration settings](../user/admin_area/settings/continuous_integration.md): Enable or disable Auto DevOps site-wide and define the artifacts' max size and expiration time.
 - [External Pipeline Validation](external_pipeline_validation.md): Enable, disable, and configure external pipeline validation.
 - [Job artifacts](job_artifacts.md): Enable, disable, and configure job artifacts (a set of files and directories which are outputted by a job when it completes successfully).
 - [Job logs](job_logs.md): Information about the job logs.
 - [Register runners](../ci/runners/runners_scope.md): Learn how to register and configure runners.
 - [Shared runners pipelines quota](../user/admin_area/settings/continuous_integration.md#shared-runners-pipeline-minutes-quota): Limit the usage of pipeline minutes for shared runners.
-- [Enable/disable Auto DevOps](../topics/autodevops/index.md#enable-or-disable-auto-devops): Enable or disable Auto DevOps for your instance.
+- [Enable or disable Auto DevOps](../topics/autodevops/index.md#enable-or-disable-auto-devops): Enable or disable Auto DevOps for your instance.
 
 ## Snippet settings
 

doc/ci/enable_or_disable_ci.md

@@ -15,8 +15,8 @@ To effectively use GitLab CI/CD, you need:
 
 You can read our [quick start guide](quick_start/index.md) to get you started.
 
-If you are using an external CI/CD server like Jenkins or Drone CI, it is advised
-to disable GitLab CI/CD in order to not have any conflicts with the commits status
+If you use an external CI/CD server like Jenkins or Drone CI, you should
+disable GitLab CI/CD to avoid conflicts with the commits status
 API.
 
 GitLab CI/CD is exposed by using the `/pipelines` and `/jobs` pages of a project.
@@ -24,17 +24,15 @@ Disabling GitLab CI/CD in a project does not delete any previous jobs.
 In fact, the `/pipelines` and `/jobs` pages can still be accessed, although
 it's hidden from the left sidebar menu.
 
-GitLab CI/CD is enabled by default on new installations and can be disabled
-either:
+GitLab CI/CD is enabled by default on all new projects. You can:
 
-- Individually under each project's settings.
-- Site-wide by modifying the settings in `gitlab.yml` and `gitlab.rb` for source
-  and Omnibus installations respectively.
+- Disable GitLab CI/CD [under each project's settings](#enable-cicd-in-a-project).
+- Set GitLab CI/CD to be [disabled in all new projects on an instance](../administration/cicd.md).
 
 This only applies to pipelines run as part of GitLab CI/CD. This doesn't enable or disable
 pipelines that are run from an [external integration](../user/project/integrations/overview.md#integrations-listing).
 
-## Per-project user setting
+## Enable CI/CD in a project
 
 To enable or disable GitLab CI/CD pipelines in your project:
 
@@ -51,54 +49,6 @@ To enable or disable GitLab CI/CD pipelines in your project:
 
 Press **Save changes** for the settings to take effect.
 
-## Make GitLab CI/CD disabled by default in new projects
-
-You can set GitLab CI/CD to be disabled by default in all new projects by modifying the settings in:
-
-- `gitlab.yml` for source installations.
-- `gitlab.rb` for Omnibus GitLab installations.
-
-Existing projects that already had CI/CD enabled are unchanged. Also, this setting only changes
-the project default, so project owners can still enable CI/CD in the project settings.
-
-For installations from source:
-
-1. Open `gitlab.yml` with your editor and set `builds` to `false`:
-
-   ```yaml
-   ## Default project features settings
-   default_projects_features:
-     issues: true
-     merge_requests: true
-     wiki: true
-     snippets: false
-     builds: false
-   ```
-
-1. Save the `gitlab.yml` file.
-
-1. Restart GitLab:
-
-   ```shell
-   sudo service gitlab restart
-   ```
-
-For Omnibus GitLab installations:
-
-1. Edit `/etc/gitlab/gitlab.rb` and add this line:
-
-   ```ruby
-   gitlab_rails['gitlab_default_projects_features_builds'] = false
-   ```
-
-1. Save the `/etc/gitlab/gitlab.rb` file.
-
-1. Reconfigure GitLab:
-
-   ```shell
-   sudo gitlab-ctl reconfigure
-   ```
-
 <!-- ## Troubleshooting
 
 Include any troubleshooting steps that you can foresee. If you know beforehand what issues

doc/ci/index.md

@@ -135,8 +135,9 @@ of GitLab CI/CD for:
 
 See also:
 
-- [How to enable or disable GitLab CI/CD](enable_or_disable_ci.md).
-- Other [CI administration settings](../administration/index.md#continuous-integration-settings).
+- [Enable or disable GitLab CI/CD in a project](enable_or_disable_ci.md).
+- [Disable GitLab CI/CD by default in new projects](../administration/cicd.md). **(FREE SELF)**
+- Other [CI administration settings](../administration/index.md#cicd-settings).
 
 ## References