[SOLVED] Proxmox 4 LXC CPU limit and disk size

[Rokixz]

Hello,

First of all I want to thank you for this great release, however I have some questions regarding LXC, I am newbie user of this container system so any help will be appreciated:

I have converted openvz containers to LXC and everything works so great so far except two things:

CPU limits seems to be not working - it just use host CPU number - does not matter if I reduce or increase the value.

Second thing is regarding storage - I have migrated all my containers to LVM, but how to reduce or increase a storage size? The Edit option is blank so I am worried what should I do if I will lack of space (should I extend logical volume size or what?).

So long story short: How to limit CPU cores number of LXC containers and how to extend or reduce containers storage in LVM volumes?

Available schedulers for my hard disks:

noop [deadline] cfq

CPU model: Intel(R) Xeon(R) CPU X3450 @ 2.67GHz

P.S.

If there are similar topics please give me a link and sorry in advance because I was unable to search such topic.

 

[sigxcpu]

Did you test CPU limits in containers and they didn't work?

Here's the top output on hypervisor with a 1CPU container and two "yes" processes

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
61594 root      20   0    4376    960    868 R  50.8  0.0   0:33.82 yes
61621 root      20   0    4376    956    864 R  48.8  0.0   0:29.31 yes

As expected, each "yes" takes half of the single core configured.

 

[Rokixz]

Did you test CPU limits in containers and they didn't work?

Here's the top output on hypervisor with a 1CPU container and two "yes" processes

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
61594 root      20   0    4376    960    868 R  50.8  0.0   0:33.82 yes
61621 root      20   0    4376    956    864 R  48.8  0.0   0:29.31 yes

As expected, each "yes" takes half of the single core configured.

It would be glad if you could write down the command you are running.

I check the CPU numbers using that command:

cat /proc/cpuinfo | grep processor | wc -l
8

but CPU number is set as 6 in my container. Maybe it should be like that I do not really know - I am new to LXC, however KVM machines are working fine as previously.

Thank you for your response anyway.

 

[sigxcpu]

You didn't check the cpu. You've read /proc/cpuinfo, but /proc is bind mounted inside containers. So you are basically reading the same "file" inside our outside the container.

 

[Rokixz]

You didn't check the cpu. You've read /proc/cpuinfo, but /proc is bind mounted inside containers. So you are basically reading the same "file" inside our outside the container.

OK I understand now, one problem is solved now, it would be glad to hear anything about the storage issue.

 

[dietmar]

see 'man pct' - there is a resize command, but only on the command line for now.

 

[Rokixz]

Thank you dietmar, I will keep in mind. Thank you all for your help, I mark topic as solved as for now.