feat: define env vars to login to private registry

README.md

@@ -93,8 +93,13 @@ curl -k https://127.0.0.1:8443
 
 Define the environment variable :
 ```bash
-CLUSTER_EXTRA_NODES=" #Mind the EOL
+CLUSTER_EXTRA_NODES="
   - role: worker
   - role: worker
   - role: worker"
 ```
+
+## Private Registry
+
+An access to a private registry is possible with the environment variables :` $CI_REGISTRY` `$CI_REGISTRY_USER` and `$CI_REGISTRY_PASSWORD`.
+For GitLab, the variables are predifined.

docker/24-dind/entrypoint.sh

@@ -19,6 +19,11 @@ if [ -n "$DOCKER_USER" ] && [ -n "$DOCKER_PASSWORD" ]; then
     docker login -u "${DOCKER_USER}" -p "${DOCKER_PASSWORD}"
 fi
 
+if [ -n "$CI_REGISTRY" ] && [ -n "$CI_REGISTRY_USER" ] && [ -n "$CI_REGISTRY_PASSWORD" ]; then
+    echo "Logging to ${CI_REGISTRY} with user ${CI_REGISTRY_USER}"
+    docker login $CI_REGISTRY -u "${CI_REGISTRY_USER}" -p "${CI_REGISTRY_PASSWORD}"
+fi
+
 if [ -z "$CLUSTER_NAME" ]; then
     export CLUSTER_NAME="kind"
     echo "Defaulting cluster name to ${CLUSTER_NAME}"

docker/24-dind/kind.yaml

@@ -16,7 +16,8 @@ nodes:
       # Propagate (hopefully) images cache
       - containerPath: /var/lib/docker/image/overlay2
         hostPath: /var/lib/docker/image/overlay2
-      #Extra Nodes (if needed) ${CLUSTER_EXTRA_NODES}
+      #Extra Nodes (if needed) 
+${CLUSTER_EXTRA_NODES}
 kubeadmConfigPatchesJSON6902:
   - group: kubeadm.k8s.io
     version: v1beta2