#!/usr/bin/env bash
# Copyright 2021 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -o errexit
set -o nounset
set -o pipefail


REPO_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
KUBECTL=$REPO_ROOT/hack/tools/bin/kubectl

# desired kind cluster name; default is "capdo"
KIND_CLUSTER_NAME="${KIND_CLUSTER_NAME:-capdo}"

if [[ "$(kind get clusters)" =~ .*"${KIND_CLUSTER_NAME}".* ]]; then
  echo "cluster already exists, moving on"
  exit 0
fi

reg_name='kind-registry'
reg_port="${KIND_REGISTRY_PORT:-5000}"

# create registry container unless it already exists
running="$(docker inspect -f '{{.State.Running}}' "${reg_name}" 2>/dev/null || true)"
if [ "${running}" != 'true' ]; then
  docker run -d --restart=always -p "127.0.0.1:${reg_port}:5000" --name "${reg_name}" registry:2
fi

# create a cluster with the local registry enabled in containerd
cat <<EOF | kind create cluster --name "${KIND_CLUSTER_NAME}" --config=-
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
containerdConfigPatches:
- |-
  [plugins."io.containerd.grpc.v1.cri".registry.mirrors."localhost:${reg_port}"]
    endpoint = ["http://${reg_name}:5000"]
EOF

# connect the registry to the cluster network
# (the network may already be connected)
docker network connect "kind" "${reg_name}" || true

# Document the local registry
# https://github.com/kubernetes/enhancements/tree/master/keps/sig-cluster-lifecycle/generic/1755-communicating-a-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

"${KUBECTL}" wait node "${KIND_CLUSTER_NAME}-control-plane" --for=condition=ready --timeout=90s
