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A Practical Guide to Kubernetes

Exploring Built-In Secrets

Explore how Kubernetes manages built-in Secrets to secure sensitive information within containers. Understand automatic token generation, mounting, and how to use Secrets for initial credentials in Jenkins.

We'll cover the following...

Creating Jenkins objects

We’ll create the same Jenkins objects we defined earlier.

Shell
kubectl create \
    -f jenkins-unprotected.yml \
    --record --save-config
kubectl rollout status deploy jenkins

We create Ingress, Deployment, and Service objects. We also execute the kubectl rollout status command that will tell us when the deployment is finished, which may take some time.

The jenkins-unprotected.yml definition does not use any new feature, so we won’t waste time going through the YAML file. Instead, we’ll open Jenkins UI in a browser.

Shell
kubectl port-forward service/jenkins 3000:8080 --address 0.0.0.0 
#Open the link beside the run button in the playground below

Upon closer inspection, you’ll notice that there is no login button. Jenkins is currently unprotected. The image does allow the option to define an initial administrative username and password.

If the files ...