GlusterFS two-node replication with UCarp failover

Gluster Volume

$ sudo gluster volume info
 
Volume Name: data
Type: Replicate
Volume ID: 7ac35911-b9c2-4f20-a226-65a6173dafb3
Status: Started
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: gluster1:/data
Brick2: gluster2:/data

interfaces - node A

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
	address 192.168.56.11
	netmask 255.255.255.0

	ucarp-vid 1
	ucarp-vip 192.168.56.10
	ucarp-password secret
	ucarp-advskew 1
	ucarp-advbase 1
	ucarp-master yes

# The UCarp virtual network interface
iface eth0:ucarp inet static
	address 192.168.56.10
	netmask 255.255.255.0

interfaces - node B

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
	address 192.168.56.12
	netmask 255.255.255.0

	ucarp-vid 1
	ucarp-vip 192.168.56.10
	ucarp-password secret
	ucarp-advskew 10
	ucarp-advbase 1
	ucarp-master no

# The UCarp virtual network interface
iface eth0:ucarp inet static
	address 192.168.56.10
	netmask 255.255.255.0

NFS4 export

/data 192.168.56.0/24(rw,async,no_subtree_check)