Proxmox 4.0 HA sequence of events

[brucexx]

Can somebody halp me understand what is happening when one of the nodes fail, we have 3 nodes cluster on Dell servers and Ceph based storage. Does the VM restarts and powers on a working node ? Also are the PVE nodes in HA active-active or active-passive ? What I mean by this is, can I have VMs running on all 3 nodes at the same time and only the VMs from the failing node will be moved automatically to another working node ?

Thank you

 

[adamb]

You can run VM's on all nodes as long as the storage is shared between all nodes. If a host node fails, the VM's running on that node will failover to the existing nodes. You need to ensure that your nodes have enough resources to run the relocated VM's.

 

[brucexx]

thank you - that is what I though based on the maximum number of host in the HA cluster but wanted to confirm as I have not set it up and tested.

 

[brucexx]

Do you know what the software fencing is doing ?

Quote:
"If the node has connection with the cluster and has quorum, the watchdog will be reset. If quorum is lost, the node is not able to reset the watchdog.- I understand up to here, next the "This will trigger a reboot after 60 seconds" - what will the reboot of the node affect do ? What if the node reboots itself and comes up and joins quorum again ?

THanks