i/o disk limit

[Bestbeast]

Hello,

I saw in some forums that lxc can limit i/o disk and wanted to know how to do it with proxmox.

Thanks

 

[Bestbeast]

BUMP

 

[dietmar]

I guess you can to this with blkio cgroups. But I have not tried this so far.

 

[Bestbeast]

I guess you can to this with blkio cgroups. But I have not tried this so far.

But any option on proxmox, or I have to do it by ssh?¿

 

[dietmar]

But any option on proxmox

I guess this needs some development - it is not trivial to configure that.

 

[Bestbeast]

And with kvm there is no option either?

 

[dietmar]

I just filed a bug report for this:

https://bugzilla.proxmox.com/show_bug.cgi?id=1072

 

[dietmar]

And with kvm there is no option either?

Disk IO limits are fully implemented with KVM - you can even configure them on the GUI ('Disk throttle' buttom)

 

[Bestbeast]

I just filed a bug report for this:

https://bugzilla.proxmox.com/show_bug.cgi?id=1072

Thank you very much

 

[Bestbeast]

I just filed a bug report for this:

https://bugzilla.proxmox.com/show_bug.cgi?id=1072

Could you please help me with this:

https://forum.proxmox.com/threads/extrange-cpu-lxc.28531/

Thanks

 

[zima]

For lxc:

lsblk to get device:

└─sda3 8:3 0 3.7T 0 part
├─pve-root 251:0 0 10G 0 lvm /
├─pve-swap 251:1 0 2G 0 lvm [SWAP]
├─pve-data_tmeta 251:2 0 116M 0 lvm
│ └─pve-data-tpool 251:4 0 3.6T 0 lvm
│ ├─pve-data 251:5 0 3.6T 0 lvm
│ ├─pve-dir 251:6 0 50G 0 lvm
│ ├─pve-vm--60200--disk--1 251:7 0 600G 0 lvm

then
limit read to 10KB/s for container 60200
echo "251:7 10000" > /sys/fs/cgroup/blkio/lxc/60200/blkio.throttle.read_bps_device

for iops use blkio.throttle.read_iops_device

 

[Bestbeast]

For lxc:

lsblk to get device:

└─sda3 8:3 0 3.7T 0 part
├─pve-root 251:0 0 10G 0 lvm /
├─pve-swap 251:1 0 2G 0 lvm [SWAP]
├─pve-data_tmeta 251:2 0 116M 0 lvm
│ └─pve-data-tpool 251:4 0 3.6T 0 lvm
│ ├─pve-data 251:5 0 3.6T 0 lvm
│ ├─pve-dir 251:6 0 50G 0 lvm
│ ├─pve-vm--60200--disk--1 251:7 0 600G 0 lvm

then
limit read to 10KB/s for container 60200
echo "251:7 10000" > /sys/fs/cgroup/blkio/lxc/60200/blkio.throttle.read_bps_device

for iops use blkio.throttle.read_iops_device

But I can not limit 1 by 1, I will need something automated like being this option in proxmox

 

[hinhthoi]

Hi @zima

The output of lsblk in my proxmox shows a different thing (attached)

So what i should do to limit the io?

Thanks!

 

[sahostking]

Unfortunately LXC seems to have major issues for cpu limiting and now disk limiting. Not very good for hosting providers.

Anyway I think I got this disk limiting thing working. Did as per above. Do I need top stop and start the lxc container after doing this?

 

[sahostking]

Seems to not save:

root@vz-cpt-1:/etc/pve/lxc# cat /sys/fs/cgroup/blkio/lxc/140/blkio.throttle.read_bps_device
251:49 50000

Then a few minutes later:

root@vz-cpt-1:/etc/pve/lxc# cat /sys/fs/cgroup/blkio/lxc/140/blkio.throttle.read_bps_device
root@vz-cpt-1:/etc/pve/lxc#

 

[Bestbeast]

@dietmar can you please inform here: https://bugzilla.proxmox.com/show_bug.cgi?id=1072
That it is not working like @sahostking have already said?

Thanks

 

[Bestbeast]

Also finded this: https://www.stgraber.org/2016/03/26/lxd-2-0-resource-control-412/
But think that lxc commands are not working so then how can it be done?

Thanks

 

[Bestbeast]

@dietmar, I have tested the i/o limit and like @sahostking says it is currently not working, it overwrites what I wrote on the fine.

Any solution?

 

[Bestbeast]

BUMP

 

[zima]

just checked on 2 containers and after +1h limit is still there and working.

Tue Nov 15 15:35:51 CET 2016
root@dreadnought:/# cat /sys/fs/cgroup/blkio/lxc/107/blkio.throttle.read_bps_device
251:19 50000
root@dreadnought:/# stat /sys/fs/cgroup/blkio/lxc/107/blkio.throttle.read_bps_device
  File: ‘/sys/fs/cgroup/blkio/lxc/107/blkio.throttle.read_bps_device’
  Size: 0               Blocks: 0          IO Block: 4096   regular empty file
Device: 1ah/26d Inode: 201         Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2016-11-15 14:31:23.386872849 +0100
Modify: 2016-11-15 14:31:23.386872849 +0100
Change: 2016-11-15 14:31:23.386872849 +0100
 Birth: -