use-docker-images-from-private-registry.md

Use Docker Images from Private Registry

Login into the registry

On your laptop, you must authenticate with a registry in order to pull a private image:

docker login

When prompted, enter your Docker username and password.

The login process creates or updates a config.json file that holds an authorization token.

View the config.json file:

cat ~/.docker/config.json

The output contains a section similar to this:

{
    "auths": {
        "https://index.docker.io/v1/": {
            "auth": "c3R...zE2"
        }
    }
}

Create the secret

Create the base64 of the docker config.json file:

base64 ~/.docker/config.json > docker-registry-secret.yml

Now edit the docker-registry-secret.yml file like this:

apiVersion: v1
kind: Secret
metadata:
  name: docker-registry
  namespace: default
data:
  .dockerconfigjson: PUT_THE_BASE64_HERE
type: kubernetes.io/dockerconfigjson

Now create the secret into kubernetes cluster:

kubectl apply -f docker-registry-secret.yml

Create a Pod that uses your Secret

Now in your deployment.yml:

apiVersion: v1
kind: Deployment
metadata:
  name: app
spec:
  containers:
  - name: app
    image: <your-private-image>
  imagePullSecrets:
  - name: docker-registry