# Part 4: Cluster Blueprints

## What Will You Do

In this section you will

- Create an add-on
- Create a custom cluster blueprint with the addon
- Apply the blueprint to your cluster

---

## Step 1: Create Add-on

In this step, you will create a custom cluster add-on from the Catalog. The add-on will then be used in a custom cluster blueprint.

- In your project, navigate to **Catalog** in the left side tree
- Search for "cert-manager"
- Click on **cert-manager** from "default-helm"

- Click **Create Add-On**
- Enter **cert-manager** for the name of the add-on
- Select the previously created namespace
- Click **Create**

- Enter **v1** for the version name
- Save the following to a file named **values.yaml**

```
installCRDs: true
```

- Click **Upload Files**
- Select the values.yaml file
- Click **Save Changes**

---

## Step 2: Create Blueprint

In this step, you will create a custom cluster blueprint which contains the previously created addon.

- In your project, navigate to **Infrastructure -> Blueprints**
- Click **New Blueprint**
- Enter **openshift-custom-bp** for the name of the blueprint
- Click **Save**

- Enter **v1** for the version name
- Select **default-openshift** for the base blueprint

- Click **Configure Add-Ons** in the Add-ons section
- Click the **+** symbol to add the cert-manager add-on to the blueprint
- Click **Save Changes**

- Click **Save Changes**

---

## Step 3: Apply Blueprint

In this step, you will apply the previously created blueprint to the cluster. Applying the blueprint will install the cert-manager add-on.

- In your project, navigate to **Infrastructure -> Clusters** in the left side tree
- Click the gear icon on your cluster
- Select **Update Blueprint**
- Select **openshift-custom-bp** for the blueprint and **v1** for the version
- Click **Save and Publish**

This will force the reconciliation of the custom cluster spec with your cluster. This can take a few minutes to complete especially if images have to be downloaded for the new add-ons.

After a short period of time, the blueprint will be applied to the cluster.

- Click **Exit**

---

## Step 4: Verify

Optionally, you can verify that the pods for cert-manager are active and operational on your cluster using kubectl.

- Enter the following command

```
kubectl get pods -n cert-manager
```

You should see something like the following

```
NAME                                       READY   STATUS    RESTARTS   AGE
cert-manager-96649f687-56xkg               1/1     Running   0          49m
cert-manager-cainjector-7d68995cff-njqrx   1/1     Running   0          49m
cert-manager-webhook-84bbbbf7d9-6kh2v      1/1     Running   0          49m
```

---

## Recap

Congratulations! At this point, you have successfully created a custom cluster blueprint and published it to your cluster.