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Bind a L2 VIP to Node Cluster with Keepalived

You can bind an optional L2 VIP on a node cluster with vip_enabled.

proxy:
  hosts:
    10.10.10.29: { nodename: proxy-1 }
    10.10.10.30: { nodename: proxy-2 } # , vip_role: master }
  vars:
    node_cluster: proxy
    vip_enabled: true
    vip_vrid: 128
    vip_address: 10.10.10.99
    vip_interface: eth1
./node.yml -l proxy -t node_vip     # enable for the first time
./node.yml -l proxy -t vip_refresh  # refresh vip config (e.g. designated master)