Re: [libvirt-users] cgroups inside LXC containers losts memory limits after some time
HI all
After unpredictable time passed (1-5 day ?), cgroups inside LXC
magicaly removed.
virsh dumpxml config look like this:
<domain type='lxc' id='3566'>
<name>puppet</name>
<uuid>6d49b280-5686-4e3c-b048-1b5d362fb137</uuid>
<memory unit='KiB'>8388608</memory>
<currentMemory unit='KiB'>8388608</currentMemory>
<memtune>
<hard_limit unit='KiB'>8388608</hard_limit>
<soft_limit unit='KiB'>8388608</soft_limit>
<swap_hard_limit unit='KiB'>9437184</swap_hard_limit>
</memtune>
<vcpu placement='static'>2</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64'>exe</type>
<init>/sbin/init</init>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/libexec/libvirt_lxc</emulator>
<filesystem type='block' accessmode='passthrough'>
<source dev='/dev/data/puppet'/>
<target dir='/'/>
</filesystem>
<interface type='direct'>
<mac address='02:00:00:25:a7:56'/>
<source dev='br502' mode='bridge'/>
<model type='virtio'/>
</interface>
<console type='pty' tty='/dev/pts/1'>
<source path='/dev/pts/1'/>
<target type='lxc' port='0'/>
<alias name='console0'/>
</console>
</devices>
<seclabel type='none'/>
</domain>
Problem go away after restart LXC container. But occurred again after
some time passed.
For containers with broken cgroups virsh memtune fails with error:
[root@]# virsh memtune --hard-limit 8G puppet --live --config
error: Unable to change memory parameters
error: unable to set memory hard_limit tunable: Operation not permitted
b.r.
Maxim Kozin