4 node cluster with one critical node

[mproxk]

I have 4 node cluster at home. I need one to be 100% uptime (critical LXC for home automation etc). Currently at v 8.3.5 with HA enabled.

Is there a way to set it up so in case of electrical outage, to keep only one PC on UPS while the rest go down? I will take care of the shutdown with UPS NUT software, but currently I will lose the quorum. At the same time I do not want to make that node standalone as I like the option to migrate the critical LXCs to new node from time to time.

Any solution? Or I need to make custom scripts?

 

[UdoB]

Is there a way to set it up so in case of electrical outage, to keep only one PC on UPS while the rest go down?

Well..., with HA enabled it is absolutely required to reboot --> fencing.

Just turn OFF HA to avoid this (and connect this node only to UPS) --> it will stay up, continues to run all currently running VMs/Containers and will not fence itself.