Added Bugzilla as external issue tracker option

Requested in #14669

Added note to changelog

3 files changed, 20 insertions, 1 deletions

diff --git a/doc/integration/external-issue-tracker.md b/doc/integration/external-issue-tracker.md
index a2d7e922aad..8d2c6351fb8 100644
--- a/doc/integration/external-issue-tracker.md
+++ b/doc/integration/external-issue-tracker.md
@@ -1,7 +1,7 @@
 # External issue tracker
 
 GitLab has a great issue tracker but you can also use an external one such as
-Jira or Redmine. Issue trackers are configurable per GitLab project and allow
+Jira, Redmine, or Bugzilla. Issue trackers are configurable per GitLab project and allow
 you to do the following:
 
 - the **Issues** link on the GitLab project pages takes you to the appropriate
@@ -20,6 +20,7 @@ Visit the links below for details:
 
 - [Redmine](../project_services/redmine.md)
 - [Jira](../project_services/jira.md)
+- [Bugzilla](../project_services/bugzilla.md)
 
 ### Service Template
 
diff --git a/doc/project_services/bugzilla.md b/doc/project_services/bugzilla.md
new file mode 100644
index 00000000000..215ed6fe9cc
--- /dev/null
+++ b/doc/project_services/bugzilla.md
@@ -0,0 +1,17 @@
+# Bugzilla Service
+
+Go to your project's **Settings > Services > Bugzilla** and fill in the required
+details as described in the table below.
+
+| Field | Description |
+| ----- | ----------- |
+| `description`   | A name for the issue tracker (to differentiate between instances, for example) |
+| `project_url`   | The URL to the project in Bugzilla which is being linked to this GitLab project. Note that the `project_url` requires PRODUCT_NAME to be updated with the product/project name in Bugzilla. |
+| `issues_url`    | The URL to the issue in Bugzilla project that is linked to this GitLab project. Note that the `issues_url` requires `:id` in the URL. This ID is used by GitLab as a placeholder to replace the issue number. |
+| `new_issue_url` | This is the URL to create a new issue in Bugzilla for the project linked to this GitLab project. Note that the `new_issue_url` requires PRODUCT_NAME to be updated with the product/project name in Bugzilla. |
+
+Once you have configured and enabled Bugzilla:
+
+- the **Issues** link on the GitLab project pages takes you to the appropriate
+  Bugzilla product page
+- clicking **New issue** on the project dashboard takes you to Bugzilla for entering a new issue
diff --git a/doc/project_services/project_services.md b/doc/project_services/project_services.md
index f81a035f70b..e15d5db3253 100644
--- a/doc/project_services/project_services.md
+++ b/doc/project_services/project_services.md
@@ -30,6 +30,7 @@ further configuration instructions and details. Contributions are welcome.
 | [Atlassian Bamboo CI](bamboo.md) | A continuous integration and build server |
 | Buildkite | Continuous integration and deployments |
 | [Builds emails](builds_emails.md) |	Email the builds status to a list of recipients |
+| [Bugzilla](bugzilla.md) | Bugzilla issue tracker |
 | Campfire | Simple web-based real-time group chat |
 | Custom Issue Tracker | Custom issue tracker |
 | Drone CI | Continuous Integration platform built on Docker, written in Go |