kind.md

Kubernetes IN Docker

read

• pkg/apis/config/v1alpha4/types.go
• https://kind.sigs.k8s.io/docs/user/resources/

install kind

curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.11.1/kind-linux-amd64
chmod +x ./kind
mv ./kind /usr/local/sbin/kind

install kubectl

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
chmod +x kubectl
mkdir -p ~/.local/bin/kubectl
mv ./kubectl /usr/local/sbin/kubectl
kubectl completion bash > /etc/bash_completion.d/kubectl
echo 'source <(kubectl completion bash)' >>~/.bashrc
echo 'alias k=kubectl' >>~/.bashrc
echo 'complete -F __start_kubectl k' >>~/.bashrc

HA cluster

cat << EOF | kind create cluster --config=-
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
- role: control-plane
- role: control-plane
- role: worker
EOF

example

cat << EOF | kind create cluster --name ${HOSTNAME} --config=-
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
networking:
  ipFamily: ipv4
  apiServerAddress: "$(hostname -i)"
  apiServerPort: 6443
  podSubnet: "192.168.225.0/24"
  serviceSubnet: "192.168.226.0/24"
  disableDefaultCNI: false
  kubeProxyMode: "ipvs"
nodes:
- role: control-plane
  extraPortMappings:
  - containerPort: 80
    hostPort: 80
    listenAddress: 0.0.0.0
    protocol: TCP
- role: worker
  image: kindest/node:v1.16.4@sha256:b91a2c2317a000f3a783489dfb755064177dbc3a0b2f4147d50f04825d016f55
  kubeadmConfigPatches:
  - |
    kind: InitConfiguration
    nodeRegistration:
      kubeletExtraArgs:
        node-labels: "version=v1.16.4"
  extraMounts:
  - hostPath: /tmp/
    containerPath: /files
    readOnly: false
    # https://kubernetes.io/docs/concepts/storage/volumes/#mount-propagation (None, HostToContainer or Bidirectional)
    propagation: HostToContainer
containerdConfigPatches:
  - |-
    [plugins."io.containerd.grpc.v1.cri".registry.configs."registry.dev.example.com".tls]
      cert_file = "/etc/docker/certs.d/registry.dev.example.com/ba_client.cert"
      key_file  = "/etc/docker/certs.d/registry.dev.example.com/ba_client.key"
EOF

delete

kind delete cluster --name ${HOSTNAME}