By default, actions-runner-controller uses [cert-manager](https://cert-manager.io/docs/installation/kubernetes/) for certificate management of Admission Webhook. Make sure you have already installed cert-manager before you install. The installation instructions for the cert-manager can be found below.
- [Installing cert-manager on Kubernetes](https://cert-manager.io/docs/installation/kubernetes/)
After installing cert-manager, install the custom resource definitions and actions-runner-controller with `kubectl` or `helm`. This will create an actions-runner-system namespace in your Kubernetes and deploy the required resources.
**Kubectl Deployment:**
```shell
# REPLACE "v0.25.2" with the version you wish to deploy