Unable to execute the fstrim for virtual machine

[parker0909]

Hi All,

I would like to execute the fstrim to the cloudlinux 7 vm, but i got below error message. I have confirmed the Qemu-guest-agent already installed properly. May i know any suggestion for this issue? Thank you.

qm agent 100 ping
qm agent 100 fstrim
VM 100 qmp command 'guest-fstrim' failed - got timeout

 

[t.lamprecht]

Hi,

can you execute time fstrim -av in the VM as root, if it's a Linux one, to see how much time the trimming actually requires to run?

 

[parker0909]

Hi Thomas,

Thank you, i have tried to execute the command. May i confirm we can just execute in the VM as root directly?
/var/tmp: 3.7 GiB (3907903488 bytes) trimmed
/boot: 796.1 MiB (834793472 bytes) trimmed
/: 601.3 GiB (645592993792 bytes) trimmed

real 5m32.876s
user 0m0.012s
sys 1m45.821s

Parker

 

[t.lamprecht]

Thank you, i have tried to execute the command. May i confirm we can just execute in the VM as root directly?

yes, that's what I meant, perfect.

/var/tmp: 3.7 GiB (3907903488 bytes) trimmed
/boot: 796.1 MiB (834793472 bytes) trimmed
/: 601.3 GiB (645592993792 bytes) trimmed

real 5m32.876s
user 0m0.012s
sys 1m45.821s

It seems we do not have a special, higher timeout for the fstrim guest command like we have for others that can block for a longer time. So, we should add a higher on per default (~ 5 minutes or so) and additionally allow to override the timeout in general for those guest commands, so that uses with even slower guest can work around the default timeouts.

Can you please open a enhancement request over at https://bugzilla.proxmox.com/ to keep track of this?

 

[parker0909]

Thank you. I just got the question a question after fstrim, I checked that the vm should be using around 1TB, but i found that the local-lvm(LVM-Thin) storage using around 1.46 TiB . I not sure why the proxmox storage(local-lvm) usage should not reduce. May i know some further step after fstrim?

Thank you.
Parker