Yup. Corosync + Pacemaker can and will implode in a spectacular fashion exactly when you don't want it to. And 2 node cluster will split brain sooner rather tha

Yup. Corosync + Pacemaker can and will implode in a spectacular fashion exactly when you don't want it to. And 2 node cluster will split brain sooner rather than later. I'd rather use keepalived if required, since it's a lot easier to understand and manage.