Quorum without HA

[aluputi]

Hello,

I have a 3 node Proxmox cluster and I'm thinking of adding another node, so there would be 4.
I don't use HA. Is there is any situation when the cluster might not start the VMs because of lack of quorum?

Thanks!

 

[spirit]

Is there is any situation when the cluster might not start the VMs because of lack of quorum?

if you loose quorum (2 nodes down / 4), you'll not be able to start vm (or any other action)

 

[aluputi]

How about a power outage, when all the servers go down and restart?

 

[sully_26]

if you loose quorum (2 nodes down / 4), you'll not be able to start vm (or any other action)

Same thing with 3 nodes, one goes down, and you dont have quorum...
Today two of our four servers went down... HA didnt work because there was no quorum...
Back in vSphere with HA, there is no such thing as quorum and HA works with whatever the number of servers you got, 1, 2, 3, 4...

 

[UdoB]

Today two of our four servers went down... HA didnt work because there was no quorum...

Yes. As expected, documented at more than one place and discussed here a zillion times.

 

[spirit]

Same thing with 3 nodes, one goes down, and you dont have quorum...

if you have 3 nodes, and you loose one, you still have quorum. (2/3 is a majority)

Today two of our four servers went down... HA didnt work because there was no quorum...

2/4 is not a majority, so no quorum

Back in vSphere with HA, there is no such thing as quorum and HA works with whatever the number of servers you got, 1, 2, 3, 4...

vmware HA require a shared storage, and it's using it as heartbeat/vote to keep quorum