create-configure-registry.sh

#!/bin/sh
set -o errexit

kind_cluster_name="$1"

# start the registry container
echo "start the registry container on port 5001"
reg_name='kind-registry'
reg_port='5001'
if [ "$(docker inspect -f '{{.State.Running}}' "${reg_name}" 2>/dev/null || true)" != 'true' ]; then
  docker run \
    -d --restart=always -p "127.0.0.1:${reg_port}:5000" --name "${reg_name}" \
    registry:2
fi
echo "============================="

# add the registry config to the nodes
echo "add the registry config to the nodes"
REGISTRY_DIR="/etc/containerd/certs.d/localhost:${reg_port}"
for node in $(kind get nodes --name ${kind_cluster_name}); do
  docker exec "${node}" mkdir -p "${REGISTRY_DIR}"
  cat <<EOF | docker exec -i "${node}" cp /dev/stdin "${REGISTRY_DIR}/hosts.toml"
[host."http://${reg_name}:5000"]
EOF
done
echo "============================="

# Connect the registry to the cluster network if not already connected
echo "Connect the registry to the cluster network if not already connected"
if [ "$(docker inspect -f='{{json .NetworkSettings.Networks.kind}}' "${reg_name}")" = 'null' ]; then
  docker network connect "kind" "${reg_name}"
fi
echo "============================="

# Document the local registry
echo "Document the local registry"
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: ConfigMap
metadata:
  name: local-registry-hosting
  namespace: kube-public
data:
  localRegistryHosting.v1: |
    host: "localhost:${reg_port}"
    help: "https://kind.sigs.k8s.io/docs/user/local-registry/"
EOF
echo "============================="