cert-manager

Let's see how to run cert-manager (GitHub, docs) in a Kubernetes cluster.

NOTE

Kubernetes objects should be installed in cert-manager namespace

Configuration

We'll use the official Helm chart):

• values.yaml

Deployment

Define the version to be used (looking at releases):

CERTMANAGER_VERSION=v1.18.2

Create the Custom Resource Definitions (CRD) (must be applied before given the Helm limitation documented in Issue #8668):

kubectl apply -f "https://github.com/cert-manager/cert-manager/releases/download/${CERTMANAGER_VERSION}/cert-manager.crds.yaml"

Manage the application:

# adds Helm chart repository
helm repo add jetstack https://charts.jetstack.io
helm repo update

# installs
helm upgrade --install cert-manager jetstack/cert-manager --namespace cert-manager --create-namespace \
  --version $CERTMANAGER_VERSION

# checks everything is ok (the 3 of them should be READY 1/1)
kubectl get deploy -n cert-manager

# uninstalls
helm delete cert-manager -n cert-manager
kubectl delete ns cert-manager