trim or discard mapped size disk from within the host machine

NabiKAZ

Member
May 6, 2017
25
1
23
40
About returning unused space (trim or discard mapped size disk)
I know about use `fstrim` command in guest vm.
But I can not login to the guest customers!
Now, my question is, is there any way to do this from within the host machine (main proxmox server)?
 

NabiKAZ

Member
May 6, 2017
25
1
23
40
I should be enable "Qemu Agent" by this command:
Code:
root@pve:~# qm set 104 -agent 1
update VM 104: -agent 1
And then stop/start vm.
But when I try again get me another error:
Code:
root@pve:~# qm agent 104 fstrim
VM 104 qmp command 'guest-fstrim' failed - got timeout
 
Last edited:

NabiKAZ

Member
May 6, 2017
25
1
23
40
Oops! Seem I just should be install "qemu-guest-agent" on guest.
Code:
# yum install qemu-guest-agent

Now works:
Code:
root@pve:~# qm agent 104 fstrim
{
   "paths" : [
      {
         "minimum" : 0,
         "path" : "/boot",
         "trimmed" : 951955456
      },
      {
         "minimum" : 0,
         "path" : "/",
         "trimmed" : 17067794432
      }
   ]
}


It's powerful ;-)

Thanks.
 

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