etcd cluster v3 docker-compose example

docker-compose

version: '2'
services:

    etcd-1:
        image: gcr.io/etcd-development/etcd:v3.3.9
        restart: always
        ports:
            - 2379
            - 2380
        volumes:
          - ./certs/:/srv/
        networks:
          etcd_net:
            ipv4_address: 172.16.21.41
        environment:
            ETCD_NAME: etcd-1
            ETCDCTL_API: 3
            ETCD_DEBUG: 1
            ETCD_INITIAL_ADVERTISE_PEER_URLS: https://172.16.21.41:2380
            ETCD_INITIAL_CLUSTER: etcd-3=https://172.16.21.43:2380,etcd-2=https://172.16.21.42:2380,etcd-1=https://172.16.21.41:2380
            ETCD_INITIAL_CLUSTER_STATE: new
            ETCD_INITIAL_CLUSTER_TOKEN: etcd-ftw
            ETCD_LISTEN_CLIENT_URLS: https://172.16.21.41:2379
            ETCD_LISTEN_PEER_URLS: https://172.16.21.41:2380
            ETCD_ADVERTISE_CLIENT_URLS: https://172.16.21.41:2379,https://127.0.0.1:2379
            ETCD_CERT_FILE: /srv/server.pem
            ETCD_KEY_FILE: /srv/server-key.pem
            ETCD_PEER_TRUSTED_CA_FILE: /srv/ca.pem
            ETCD_PEER_CERT_FILE: /srv/peer.pem
            ETCD_PEER_KEY_FILE: /srv/peer-key.pem
            ETCD_PEER_CLIENT_CERT_AUTH: 1
    etcd-2:
        image: gcr.io/etcd-development/etcd:v3.3.9
        restart: always
        ports:
            - 2379
            - 2380
        volumes:
          - ./certs/:/srv/
        networks:
          etcd_net:
            ipv4_address: 172.16.21.42
        environment:
            ETCD_NAME: etcd-2
            ETCDCTL_API: 3
            ETCD_DEBUG: 1
            ETCD_INITIAL_ADVERTISE_PEER_URLS: https://172.16.21.42:2380
            ETCD_INITIAL_CLUSTER: etcd-3=https://172.16.21.43:2380,etcd-2=https://172.16.21.42:2380,etcd-1=https://172.16.21.41:2380
            ETCD_INITIAL_CLUSTER_STATE: new
            ETCD_INITIAL_CLUSTER_TOKEN: etcd-ftw
            ETCD_LISTEN_CLIENT_URLS: https://172.16.21.42:2379
            ETCD_LISTEN_PEER_URLS: https://172.16.21.42:2380
            ETCD_ADVERTISE_CLIENT_URLS: https://172.16.21.42:2379,https://127.0.0.1:2379
            ETCD_CERT_FILE: /srv/server.pem
            ETCD_KEY_FILE: /srv/server-key.pem
            ETCD_PEER_TRUSTED_CA_FILE: /srv/ca.pem
            ETCD_PEER_CERT_FILE: /srv/peer.pem
            ETCD_PEER_KEY_FILE: /srv/peer-key.pem
            ETCD_PEER_CLIENT_CERT_AUTH: 1
    etcd-3:
        image: gcr.io/etcd-development/etcd:v3.3.9
        restart: always
        ports:
            - 2379
            - 2380
        volumes:
          - ./certs/:/srv/
        networks:
          etcd_net:
            ipv4_address: 172.16.21.43
        environment:
            ETCD_NAME: etcd-3
            ETCDCTL_API: 3
            ETCD_DEBUG: 1
            ETCD_INITIAL_ADVERTISE_PEER_URLS: https://172.16.21.43:2380
            ETCD_INITIAL_CLUSTER: etcd-3=https://172.16.21.43:2380,etcd-2=https://172.16.21.42:2380,etcd-1=https://172.16.21.41:2380
            ETCD_INITIAL_CLUSTER_STATE: new
            ETCD_INITIAL_CLUSTER_TOKEN: etcd-ftw
            ETCD_LISTEN_CLIENT_URLS: https://172.16.21.43:2379
            ETCD_LISTEN_PEER_URLS: https://172.16.21.43:2380
            ETCD_ADVERTISE_CLIENT_URLS: https://172.16.21.43:2379,https://127.0.0.1:2379
            ETCD_CERT_FILE: /srv/server.pem
            ETCD_KEY_FILE: /srv/server-key.pem
            ETCD_PEER_TRUSTED_CA_FILE: /srv/ca.pem
            ETCD_PEER_CERT_FILE: /srv/peer.pem
            ETCD_PEER_KEY_FILE: /srv/peer-key.pem
            ETCD_PEER_CLIENT_CERT_AUTH: 1
networks:
  etcd_net:
    driver: bridge
    driver_opts:
      com.docker.network.enable_ipv6: "false"
    ipam:
      driver: default
      config:
      - subnet: 172.16.21.0/24
        gateway: 172.16.21.1