Add latest changes from gitlab-org/gitlab@13-11-stable-eev13.11.0-rc43

1 files changed, 15 insertions, 1 deletions

diff --git a/doc/development/cicd/index.md b/doc/development/cicd/index.md
index eb2224d710a..35c4cc0694e 100644
--- a/doc/development/cicd/index.md
+++ b/doc/development/cicd/index.md
@@ -23,7 +23,7 @@ On the left side we have the events that can trigger a pipeline based on various
 
 - A `git push` is the most common event that triggers a pipeline.
 - The [Web API](../../api/pipelines.md#create-a-new-pipeline).
-- A user clicking the "Run Pipeline" button in the UI.
+- A user clicking the "Run pipeline" button in the UI.
 - When a [merge request is created or updated](../../ci/merge_request_pipelines/index.md#pipelines-for-merge-requests).
 - When an MR is added to a [Merge Train](../../ci/merge_request_pipelines/pipelines_for_merged_results/merge_trains/index.md#merge-trains).
 - A [scheduled pipeline](../../ci/pipelines/schedules.md#pipeline-schedules).
@@ -182,3 +182,17 @@ Watch a walkthrough of this feature in details in the video below.
 <figure class="video-container">
   <iframe src="https://www.youtube.com/embed/NmdWRGT8kZg" frameborder="0" allowfullscreen="true"> </iframe>
 </figure>
+
+## External pipeline validation service
+
+The [external CI/CD pipeline validation service](../../administration/external_pipeline_validation.md)
+is available for use on self-managed GitLab instances, but is not in use on GitLab.com.
+It is configured with [environment variables](../../administration/environment_variables.md)
+on the instance.
+
+To enable the feature on GitLab.com, enable the `ci_external_validation_service`
+[feature flag](../feature_flags/index.md). The valid "Not accepted" response code
+for GitLab.com is `406` only.
+
+For more details, see the linked issues and MRs in the
+[feature flag rollout issue](https://gitlab.com/gitlab-org/gitlab/-/issues/325982).