Custom FreeBSD UCARP Setup

This entry is sponsored by fme AG company – and this article aspires to share about interesting HA setup on node01a and node01b VMs. The interesting case here is that the 10.0.0.x/24 is limited in one of the clients – most IP(s) are taken. With normal carp(4) installation we would need 3 IP(s) from that network – two IP(s) for each of the two nodes and an additional HA IP for the service. To overcome that we will use 3 IPs(2) from different 192.168.0.x/24 network and only one IP from the limited 10.0.0.x/24 network. The net/ucarp port that we will use here has only one disadvantage that we can overcome easily – it does not do anything to MAC addresses of the network interfaces – and knowing how the network switches work – they may ‘redirect’ traffic to ‘bad’ interface with ‘bad’ MAC address – so we will also use something like HA MAC concept and move that HA MAC with the HA IP. List of these Bhyve VMs below. bhyve # vm list | grep -e NAME -e node01 NAME DATASTORE LOADER CPU MEMORY VNC…