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---
stage: Configure
group: Configure
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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
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---
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# Auto DevOps development guide **(CORE)**
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This document provides a development guide for contributors to
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[Auto DevOps ](../topics/autodevops/index.md ).
< i class = "fa fa-youtube-play youtube" aria-hidden = "true" > < / i >
An [Auto DevOps technical walk-through ](https://youtu.be/G7RTLeToz9E )
is also available on YouTube.
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## Development
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Auto DevOps builds on top of GitLab CI/CD to create an automatic pipeline
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based on your project contents. When Auto DevOps is enabled for a
project, the user does not need to explicitly include any pipeline configuration
through a [`.gitlab-ci.yml` file ](../ci/yaml/README.md ).
In the absence of a `.gitlab-ci.yml` file, the [Auto DevOps CI
template](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml)
is used implicitly to configure the pipeline for the project. This
template is a top-level template that includes other sub-templates,
which then defines jobs.
Some jobs use images that are built from external projects:
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- [Auto Build ](../topics/autodevops/stages.md#auto-build ) uses
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[configuration ](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Jobs/Build.gitlab-ci.yml )
in which the `build` job uses an image that is built using the
[`auto-build-image` ](https://gitlab.com/gitlab-org/cluster-integration/auto-build-image )
project.
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- [Auto Deploy ](../topics/autodevops/stages.md#auto-deploy ) uses
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[configuration ](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml )
in which the jobs defined in this template use an image that is built using the
[`auto-deploy-image` ](https://gitlab.com/gitlab-org/cluster-integration/auto-deploy-image )
project. By default, the Helm chart defined in
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[`auto-deploy-app` ](https://gitlab.com/gitlab-org/cluster-integration/auto-deploy-image/-/tree/master/assets/auto-deploy-app ) is used to deploy.
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There are extra variables that get passed to the CI jobs when Auto
DevOps is enabled that are not present in a normal CI job. These can be
found in
[`ProjectAutoDevops` ](https://gitlab.com/gitlab-org/gitlab/blob/bf69484afa94e091c3e1383945f60dbe4e8681af/app/models/project_auto_devops.rb ).
## Development environment
Configuring [GDK for Auto
DevOps](https://gitlab.com/gitlab-org/gitlab-development-kit/blob/master/doc/howto/auto_devops.md).
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## Monitoring on GitLab.com
The metric
[`auto_devops_completed_pipelines_total` ](https://thanos-query.ops.gitlab.net/graph?g0.range_input=72h&g0.max_source_resolution=0s&g0.expr=sum(increase(auto_devops_pipelines_completed_total%7Benvironment%3D%22gprd%22%7D%5B60m%5D ))%20by%20(status)& g0.tab=0)
(only available to GitLab team members) counts completed Auto DevOps
pipelines, labeled by status.
