image-clone-controller

README

Image clone controller

image clone controller is a kubernetes controller to safe guard against the risk of container images disappearing from public registry

Deployment

The yaml files for deploying the controller are located in deploy folder.

1. Build the controller and push it into private registry

docker build -t repo.treescale.com/kmjayadeep/image-clone-controller:latest .
docker push repo.treescale.com/kmjayadeep/image-clone-controller:latest

1. Edit the controller.yaml and make sure the controller image is pointing to your private registry
2. Deploy a kubernetes secret with the name registry-secret which contains credentials to access the container registry
3. Apply the manifests

kubectl apply -f deploy/

Testing

Deploy a sample deployment in default namespace

kubectl create deploy nginx --image nginx

Watch the deployment being updated with new image

kubectl get po -w

verify that the image is updated

❯ k describe po -l app=nginx | grep Image
    Image:          repo.treescale.com/kmjayadeep/nginx:latest
    Image ID:       docker.io/library/nginx@sha256:06e4235e95299b1d6d595c5ef4c41a9b12641f6683136c18394b858967cd1506

Demo

watch the short demo on asciinema : https://asciinema.org/a/441210