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---
stage: Configure
group: Configure
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
---
# Install cert-manager with a cluster management project
> [Introduced](https://gitlab.com/gitlab-org/project-templates/cluster-management/-/merge_requests/5) in GitLab 14.0.
Assuming you already have a [Cluster management project](../../../../../user/clusters/management_project.md) created from a
[management project template](../../../../../user/clusters/management_project_template.md), to install cert-manager you should
uncomment this line from your `helmfile.yaml`:
```yaml
- path: applications/cert-manager/helmfile.yaml
```
cert-manager:
- Is installed by default into the `gitlab-managed-apps` namespace of your cluster.
- Can be installed with or without a default
[Let's Encrypt `ClusterIssuer`](https://cert-manager.io/docs/configuration/acme/), which requires an
email address to be specified. The email address is used by Let's Encrypt to
contact you about expiring certificates and issues related to your account.
The following configuration in your `applications/cert-manager/helmfile.yaml` is required to install cert-manager:
```yaml
certManager:
installed: true
letsEncryptClusterIssuer:
installed: true
email: "user@example.com"
```
Or without the default `ClusterIssuer`:
```yaml
certManager:
installed: true
letsEncryptClusterIssuer:
installed: false
```
You can customize the installation of cert-manager by defining a
`.gitlab/managed-apps/cert-manager/values.yaml` file in your cluster
management project. Refer to the
[chart](https://github.com/jetstack/cert-manager) for the
available configuration options.
Support for installing the Cert Manager managed application is provided by the
GitLab Configure group. If you run into unknown issues,
[open a new issue](https://gitlab.com/gitlab-org/gitlab/-/issues/new), and ping at
least 2 people from the
[Configure group](https://about.gitlab.com/handbook/product/categories/#configure-group).
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