Reports until 14:40, Tuesday 10 December 2024
H1 AOS
jonathan.hanks@LIGO.ORG - posted 14:40, Tuesday 10 December 2024 - last comment - 14:06, Wednesday 11 December 2024(81737)
WP 12239 Moving EPICS related processes to other hardware in order to do a rebuild of a VM hypervisor 
As part of WP 12239 we moved h0epics, cdsvmscript1, epics-burt, autoburt off of the cds0proxmox hypervisor.  This resulted in a few minutes of down time for the dust monitor IOC around 8:19am localtime.

After this we done we were able to look at cdsproxmox.  Its boot drive had failed.  After some help from Fil we got the drives replaced and reinstalled proxmox ve on cdsproxmox.  We adjusted DNS and renamed the box cdsproxmox0.

Some notes:

 * This is now in a temporary state.  We aim to retire this hardware by or at the end of O4.  New hypervisor computers are being procured.  As such we did not provision much storage on this.  Just enough to run the hypervisor, relying on the shared storage layer to handle the VM.

 * As per the proxmox administrators guild we removed cdsproxmox from the cluster prior to attaching it back as cdsproxmox0.
Comments related to this report
erik.vonreis@LIGO.ORG - 14:06, Wednesday 11 December 2024 (81770)
Link

to change a disk image name in proxmox,

Get the numeric id for the VM from the web interface

Turn off the VM

edit /etc/pve/nodes/<hypervisor hostname>/qemu-server/<id>.conf

Change the disk image name and save the file.

Find the disk image file and change its name also.

Restart the VM. It will load from the renamed file.