First of all, we need to select and assign a virtual IP address (VIP) that can freely float between cluster nodes.
This configuration creates p_ip_api, a virtual IP address for use by the API node (192.168.42.103) :
primitive p_api-ip ocf:heartbeat:IPaddr2 \
params ip="192.168.42.103" cidr_netmask="24" \
op monitor interval="30s"