NFS Storage, what happens with OpenVZ VMs when it goes offline?

[Alexander Hjelm]

Hi, i have 40 OpenVZ VMs in a Proxmox cluster with 4 nodes and a NFS storage over Ethernet.
What happens with my VMs when the NFS storage goes offline?
It have happend 4-5 times now and everytime my webinterface shows no status of the VMs and i cannot SSH into them, but i can ping with icmp.

Is this damaging my VMs or is it like a "safe" failure system in proxmox that nothing can write or read until the storage gets back? not even from memory?
How bad is this for my VMs if it will happen 4-5 times per year?

 

[Mr.Holmes]

Hello Alexander

Hi, i have 40 OpenVZ VMs in a Proxmox cluster with 4 nodes and a NFS storage over Ethernet.
What happens with my VMs when the NFS storage goes offline?
It have happend 4-5 times now and everytime my webinterface shows no status of the VMs and i cannot SSH into them, but i can ping with icmp.

Is this damaging my VMs or is it like a "safe" failure system in proxmox that nothing can write or read until the storage gets back? not even from memory?
How bad is this for my VMs if it will happen 4-5 times per year?

If a system looses access to it´s storage some things will not work. It does not count if it´s a physical HD, a network storage or whatever. What will you do e.g. if in your native system the all of a sudden the local drive is not accessible any more caused by a defect cable? You will repair the defect and restart the computer. Usually nothing wrong will have been done with the data on the disk. If it´s a network drive not even a reboot is necessary (but in order to have clear conditions I would do it in that case). Same for VMs and containers!

Kind regards

Mr.Holmes