Proxmox HA - turning off mashine when one node is down

[krzysiexp]

Hi!
I have 4 nodes Proxmox cluster.
VM on that nodes are HA managed:

• node1: 2x prod VM
• node2: 1x prod VM
• node3: 1x prod VM
• node4: 1x test VM

I want to turn off the test VM when any of nodes is down to free resources for production VM's.
Is there any way to configure this?

 

[dcsapak]

no, you would have to script that yourself, e.g. with a cronjob/systemd timer check how many nodes are online and set the wanted ha state for that vm

 

[krzysiexp]

Thanks for reply
Is there any better command to check how many nodes are online than "ha-manager status"?

 

[dcsapak]

there are multiple possibilities, e.g.

pvecm status
pvecm nodes
pvesh get /cluster/config/nodes

 

[guletz]

Hi,

I want to turn off the test VM when any of nodes is down to free resources for production VM's.
Is there any way to configure this?

You can make a custom script, who can count the online nodes(pvecm status | grep ...| wc ....). So IF online nodes < 4 THEN "shut down VM_with_id_XXXX". You will need to run this script on at least 2 nodes or more(in case of the node who run this script is down). The best way is to run this script on the node who run your "test VM"(=node4).

Good luck!

 

[krzysiexp]

Thanks for help
I wrote a simple script

#!/bin/bash
VM_ID_TO_STOP=300
if [[ $(pvecm status | grep Nodes | tr -dc '0-9') -lt 4 ]] && [[ qm status ${VM_ID_TO_STOP} | grep -o '\S*$' == "running" ]]; then
echo 'Less than 4 nodes in cluser - shuting down VM ${VM_ID_TO_STOP}' | systemd-cat -t "vm-shutdown-script" -p emerg
qm stop ${VM_ID_TO_STOP}
fi

And it works