version: '2.4'

x-etcd-environment: &_x-etcd-environment
  ALLOW_NONE_AUTHENTICATION: "yes"
  ETCD_LISTEN_PEER_URLS: http://0.0.0.0:2380
  ETCD_LISTEN_CLIENT_URLS: http://0.0.0.0:2379
  ETCD_INITIAL_CLUSTER_TOKEN: etcd-cluster
  ETCD_INITIAL_CLUSTER: etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380
  ETCD_INITIAL_CLUSTER_STATE: new
  ETCD_DATA_DIR: /bitnami/etcd/data/db
  ETCD_WAL_DIR: /bitnami/etcd/data/wal

x-etcd-base: &_x-etcd-base
  image: docker.io/bitnami/etcd:3
  entrypoint: ["/etcd-entrypoint.sh", "/opt/bitnami/scripts/etcd/entrypoint.sh"]
  command: ["/opt/bitnami/scripts/etcd/run.sh"]
  user: root

x-k3s-master-base: &_x-k3s-master-base
  image: "docker.io/rancher/k3s:${K3S_VERSION:-latest}"
  networks:
    default:
      aliases:
        - k3s-master
  tmpfs:
    - /run
    - /var/run
  ulimits:
    nproc: 65535
    nofile:
      soft: 65535
      hard: 65535
  privileged: true
  restart: always
  ports:
    - 6443
  environment:
    - K3S_KUBECONFIG_OUTPUT=/output/kubeconfig.yaml
    - K3S_KUBECONFIG_MODE=666
    - K3S_NODE_NAME=master
  volumes:
    - server:/var/lib/rancher/k3s/server
    - output:/output
    - ./etc/registries.yaml:/etc/rancher/k3s/registries.yaml:ro
    - ./certs/root.crt:/etc/ssl/certs/root.crt:ro
    - ./certs/registry.crt:/etc/ssl/certs/registry.crt:ro
    - .:${APP_ROOT_MOUNT?Please set APP_ROOT_MOUNT(where to mount $PWD)}

x-k3s-agent-base: &_x-k3s-agent-base
  image: "docker.io/rancher/k3s:${K3S_VERSION:-latest}"
  tmpfs:
    - /run
    - /var/run
  ulimits:
    nproc: 65535
    nofile:
      soft: 65535
      hard: 65535
  volumes:
    - .:${APP_ROOT_MOUNT?Please specify where to mount $PWD}
    - ./etc/registries.yaml:/etc/rancher/k3s/registries.yaml:ro
    - ./certs/root.crt:/etc/ssl/certs/root.crt:ro
    - ./certs/registry.crt:/etc/ssl/certs/registry.crt:ro
    - server:/var/lib/rancher/k3s/server:ro
  privileged: true
  restart: always
  networks:
    default:
    nginx:
  ports:
    - 443
  environment:
    - K3S_URL=https://k3s-master:6443
    - K3S_TOKEN_FILE=/var/lib/rancher/k3s/server/node-token
    - K3S_NODE_NAME=k3s-agent
    - VIRTUAL_HOST=${VHOST_STUB},*${VHOST_SUFFIX}
    - VIRTUAL_PROTO=https
    - VIRTUAL_PORT=443
    - SELF_SIGNED_HOST=${VHOST_STUB},*${VHOST_SUFFIX}
    - HTTPS_METHOD=noredirect

x-coredns-base: &_x-coredns-base
  image: docker.io/coredns/coredns
  command: ['-conf', '/etc/coredns/Corefile']
  restart: always
  volumes:
    - server:/var/lib/rancher/k3s/server
    - output:/output
    - ./etc/coredns:/etc/coredns:ro

networks:
  default:
  nginx:
    external:
      name: nginx

services:
  etcd1:
    <<: *_x-etcd-base
    environment:
      <<: *_x-etcd-environment
      ETCD_NAME: etcd1
      ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd1:2380
      ETCD_ADVERTISE_CLIENT_URLS: http://etcd1:2379
    volumes:
    - ./scripts/etcd-entrypoint.sh:/etcd-entrypoint.sh:ro
    - etcd1-data:/bitnami/etcd/data

  etcd2:
    <<: *_x-etcd-base
    environment:
      <<: *_x-etcd-environment
      ETCD_NAME: etcd2
      ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd2:2380
      ETCD_ADVERTISE_CLIENT_URLS: http://etcd2:2379
    volumes:
    - ./scripts/etcd-entrypoint.sh:/etcd-entrypoint.sh:ro
    - etcd2-data:/bitnami/etcd/data

  etcd3:
    <<: *_x-etcd-base
    environment:
      <<: *_x-etcd-environment
      ETCD_NAME: etcd3
      ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd3:2380
      ETCD_ADVERTISE_CLIENT_URLS: http://etcd3:2379
    volumes:
    - ./scripts/etcd-entrypoint.sh:/etcd-entrypoint.sh:ro
    - etcd3-data:/bitnami/etcd/data

  k3s-master-1:
    <<: *_x-k3s-master-base
    command: [
      "server",
      "--with-node-id",
      "--disable=traefik,coredns",
      "--node-taint", "node-role.kubernetes.io/master=true:NoSchedule",
      "--datastore-endpoint=http://etcd1:2379",
      "--cluster-init",
    ]

  k3s-master-2:
    <<: *_x-k3s-master-base
    command: [
      "server",
      "--with-node-id",
      "--disable=traefik,coredns",
      "--node-taint", "node-role.kubernetes.io/master=true:NoSchedule",
      "--datastore-endpoint=http://etcd2:2379",
      "--server=http://k3s-master-1:6443",
    ]

  k3s-master-3:
    <<: *_x-k3s-master-base
    command: [
      "server",
      "--with-node-id",
      "--disable=traefik,coredns",
      "--node-taint", "node-role.kubernetes.io/master=true:NoSchedule",
      "--datastore-endpoint=http://etcd3:2379",
      "--server=http://k3s-master-1:6443",
    ]

  k3s-coredns-1:
    <<: *_x-coredns-base

  k3s-coredns-2:
    <<: *_x-coredns-base

  k3s-coredns-3:
    <<: *_x-coredns-base

  k3s-agent-1:
    <<: *_x-k3s-agent-base
    command: [
      "agent",
      "--with-node-id",
    ]

  k3s-agent-2:
    <<: *_x-k3s-agent-base
    command: [
      "agent",
      "--with-node-id",
    ]

volumes:
  etcd1-data:
  etcd2-data:
  etcd3-data:
  server: {}
  output: {}