Quick question about cluster?

[killmasta93]

Hi,
I was wondering if someone could shed some light on a question i have, currently i have a 3 node cluster, i remember one time 2 servers dropped dead but the vms wont start on the server that was working because of the quorum. I don't remember how i did it before, do i just remove the other 2 servers that dropped dead from the cluster and then the vms start?
something like this?
And whats the ratio from the cluster for the vms to start?
ex: 8 nodes cluster whats the ratio that the VMs wont start?

pvecm delnode prometheus3


mv /etc/pve/nodes/prometheus3/ /root/

Thank you

 

[aaron]

Once the majority of the servers in a cluster are able to see each other, you will have quorum.

To see how many nodes you need in the quorum to be functional run pvecm status.

One part of the output will show you the quorum information and how many votes it needs to be quorate. Take the following sample output:

Votequorum information
----------------------
Expected votes:   10
Highest expected: 10
Total votes:      10
Quorum:           6 
Flags:            Quorate

This is a 10 node cluster that needs at least 6 nodes in the quorum.

 

[killmasta93]

thanks for the reply, and as for starting VMs when they dont have enough votes is that possible?

 

[aaron]

as for starting VMs when they dont have enough votes is that possible?

Not without tweaking some settings or doing it manually. But all these "options" have a high potential to shoot yourself in the foot later on.
I personally would rather spend the time to improve the availability on the other two nodes.