version: '2'
services:
  keepalived-master:
    restart: always
    image: arcts/keepalived
    network_mode: host
    cap_add:
      - NET_ADMIN
    environment:
      KEEPALIVED_AUTOCONF: true
      KEEPALIVED_STATE: MASTER
      KEEPALIVED_INTERFACE: eth0
      KEEPALIVED_VIRTUAL_ROUTER_ID: 2
      KEEPALIVED_UNICAST_SRC_IP: ${master_ip}
      KEEPALIVED_UNICAST_PEER_0: ${backup_ip}
      KEEPALIVED_TRACK_INTERFACE_1: eth0
      KEEPALIVED_VIRTUAL_IPADDRESS_1: "\"${virtual_ip}\""
    labels:
      io.rancher.scheduler.affinity:host_label: ${host_label}=${master_host_label}

  keepalived-backup:
    restart: always
    image: arcts/keepalived
    network_mode: host
    cap_add:
      - NET_ADMIN
    environment:
      KEEPALIVED_AUTOCONF: true
      KEEPALIVED_STATE: BACKUP
      KEEPALIVED_INTERFACE: eth0
      KEEPALIVED_VIRTUAL_ROUTER_ID: 2
      KEEPALIVED_UNICAST_SRC_IP: ${backup_ip}
      KEEPALIVED_UNICAST_PEER_0: ${master_ip}
      KEEPALIVED_TRACK_INTERFACE_1: eth0
      KEEPALIVED_VIRTUAL_IPADDRESS_1: "\"${virtual_ip}\""
    labels:
      io.rancher.scheduler.affinity:host_label: ${host_label}=${backup_host_label}