Kubernetes Advanced

Deploying cert-manager and creating a cluster certificate issuer

In this section, we will deploy cert-manager using helm.

  1. Add cert-manager helm repo and run helm repo update

    helm repo add jetstack https://charts.jetstack.io
    helm repo update
  2. Install cert-manager using helm

    helm install cert-manager --namespace cert-manager --create-namespace --set installCRDs=true
    NAME: cert-manager
    LAST DEPLOYED: Wed Apr 24 01:27:17 2024
    NAMESPACE: cert-manager
    STATUS: deployed
    TEST SUITE: None
    cert-manager v1.14.4 has been deployed successfully!
    In order to begin issuing certificates, you will need to set up a ClusterIssuer
    or Issuer resource (for example, by creating a 'letsencrypt-staging' issuer).
    More information on the different types of issuers and how to configure them
    can be found in our documentation:
    For information on how to configure cert-manager to automatically provision
    Certificates for Ingress resources, take a look at the `ingress-shim`
  3. Verify whether cert-manager ingress controller is successfully deployed by checking if cert-manager namespace is created and all the relevant pods and services are running.

    kubectl get ns
    NAME          	STATUS   AGE
    cert-manager  	Active   7m45s
    default       	Active   3d14h
    ingress-nginx 	Active   4m29s
    kube-node-lease   Active   3d14h
    kube-public   	Active   3d14h
    kube-system   	Active   3d14h
    kubectl get all -n cert-manager
    NAME                                        	READY   STATUS	RESTARTS   AGE
    pod/cert-manager-5f8646db6b-fphnb          	1/1 	Running   0      	5m33s
    pod/cert-manager-cainjector-5cf5f57dd7-btlkj   1/1 	Running   0      	5m33s
    pod/cert-manager-webhook-687b7f8b97-hslpj  	1/1 	Running   0      	5m33s
    NAME                       	TYPE    	CLUSTER-IP  	EXTERNAL-IP   PORT(S)	AGE
    service/cert-manager       	ClusterIP	<none>    	9402/TCP   5m33s
    service/cert-manager-webhook   ClusterIP   <none>    	443/TCP	5m33s
    NAME                                  	READY   UP-TO-DATE   AVAILABLE   AGE
    deployment.apps/cert-manager          	1/1 	1        	1       	5m33s
    deployment.apps/cert-manager-cainjector   1/1 	1        	1       	5m33s
    deployment.apps/cert-manager-webhook  	1/1 	1        	1       	5m33s
    NAME                                             	DESIRED   CURRENT   READY   AGE
    replicaset.apps/cert-manager-5f8646db6b          	1     	1     	1   	5m33s
    replicaset.apps/cert-manager-cainjector-5cf5f57dd7   1     	1     	1   	5m33s
    replicaset.apps/cert-manager-webhook-687b7f8b97  	1     	1     	1   	5m33s
  4. In this tutorial, we’re using Let’s Encrypt as certificate authority, which provides free TLS certificates. Let’s create clusterissuer.yaml using Let’s Encrypt staging environment.

    apiVersion: cert-manager.io/v1
    kind: ClusterIssuer
      name: letsencrypt-staging
      namespace: cert-manager
         server: https://acme-staging-v02.api.letsencrypt.org/directory
         email: <your project bot email address>
           name: letsencrypt-staging
            - http01:
            	 class: nginx
  5. Run the kubectl command below to create a cluster certificate issuer.

    kubectl create -f clusterissuer.yaml
    clusterissuer.cert-manager.io/letsencrypt-staging created

More information

For more information, refer to:

Tutorial Complete!

You have completed this tutorial. Continue with the other tutorials in the Series or return to the tutorials home page.

Return Home