In today's world, security is a top priority for any organization or individual. Cert Manager is a Kubernetes add-on that helps manage and automate the process of obtaining, renewing, and revoking TLS certificates. In this article, we will go through a step-by-step guide on how to install Cert Manager on Kubernetes.
Step 1: Ensure that your Kubernetes cluster is running
Before installing Cert Manager, make sure your Kubernetes cluster is up and running. You can check the status of your cluster by running the following command:
If the command returns information about your cluster, it means your cluster is running.
Step 2: Install the Cert Manager CRDs
Cert Manager uses custom resource definitions (CRDs) to manage certificates and their associated resources. To install the CRDs, run the following command:
kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.5.4/cert-manager.crds.yaml
Step 3: Create a namespace for Cert Manager
Next, create a namespace for Cert Manager by running the following command:
kubectl create namespace cert-manager
Step 4: Add the Jetstack Helm repository
Cert Manager is installed using the Helm package manager. Add the Jetstack Helm repository to your local Helm installation by running the following command:
helm repo add jetstack https://charts.jetstack.io
Step 5: Install Cert Manager
Finally, install Cert Manager by running the following command:
helm install cert-manager jetstack/cert-manager --namespace cert-manager --version v1.5.4 --set installCRDs=true
Congratulations! You have successfully installed Cert Manager on your Kubernetes cluster.
- Verify the installation
To verify that Cert Manager is installed and running correctly, you can run the following command:
kubectl get pods --namespace cert-manager
This command should return a list of pods running in the cert-manager namespace.
- Test Cert Manager
You can test Cert Manager by creating a test certificate. Create a file named test-certificate.yaml with the following content:
Apply the configuration using the following command:
kubectl apply -f test-certificate.yaml
You can check the status of the certificate by running the following command:
kubectl describe certificate test-certificate
If everything is set up correctly, you should see a message that the certificate was issued and is valid.
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That's it for this post. Keep practicing and have fun. Leave your comments if any.