Local kubernetes startup

lk8s

#!/bin/sh
set -o errexit

up()
{
if ! docker ps > /dev/null 2>&1;
then 
    echo You need to install docker before running this tool    
    exit 1
fi


if ! kind -h > /dev/null 2>&1;
then
    if [[ $OSTYPE == 'darwin'* ]]  && brew -h > /dev/null 2>&1; then
        echo 'Since you are on a mac and already have brew installed, this script is installing Kind now'
        brew install kind
    else
        echo You need to install kind to run this script. see https://kind.sigs.k8s.io/ 
        exit 1
    fi
fi

echo "Starting up Kind with local container registry and ingress controller" 

# create registry container unless it already exists
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

# create a cluster with the local registry enabled in containerd
cat <<EOF | kind create cluster --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"]
nodes:
- role: control-plane
  kubeadmConfigPatches:
  - |
    kind: InitConfiguration
    nodeRegistration:
      kubeletExtraArgs:
        node-labels: "ingress-ready=true"
  extraPortMappings:
  - containerPort: 80
    hostPort: 80
    protocol: TCP
  - containerPort: 443
    hostPort: 443
    protocol: TCP
EOF

# 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

# 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

echo "installing nginx ingress controller for Kind"
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml

echo "waiting for ingress to be ready"
sleep 20
kubectl wait --namespace ingress-nginx \
  --for=condition=ready pod \
  --selector=app.kubernetes.io/component=controller \
  --timeout=180s
}

down()
{
    echo "removing kind cluster and local registry"
    kind delete cluster
    docker stop kind-registry
    docker rm kind-registry
}

if [[ "$1" = "up" ]]
then
  up
fi

if [[ "$1" = "down" ]]
then
  down
fi