search for: cgconfig

Is there a way to automatically set the permissions of cgroups directories created by libvirt when a VM is launched? Although it looks like I can set permissions on top-level /cgroup directories via cgconfig.conf, the cgconfig.conf manpage says "Permissions are related only to enclosing control group and are not inherited by subgroups.". From this, I believe that when libvirt creates VMs, the new directories under /cgroup/*/libvirt/qemu/<vm name>/ will not receive the cgconfig.conf per...

...s for resource management. Even after long hours of reading, I am not quite sure about how to deal with the cgroups facilities. First, do I really need to care about all that, or libvirt and systemd will manage the resource in an efficient way right out of the box? If not, It's all about /etc/cgconfig.conf and cgrules.conf. I am honestly not sure : -what are the correct mount points for cpu, memory etc in the /sys/fs/cgroup directory . - which directories am I supposed to mk, if any ? Then, Archwiki[1] says: # cgcreate -a $USER -g memory,cpu:groupname - what is the groupename I shall create...

...ollers must be mounted Really appreciated if someone could shed some lights. Seems to some libvirt / cgroup settings related. $ cat /proc/mounts .. none /cgroup cgroup rw,relatime,net_prio,perf_event,blkio,net_cls,freezer,devices,memory,cpuacct,cpu,ns,cpuset 0 0 .. $ chkconfig --list | grep cg cgconfig 0:off 1:off 2:off 3:off 4:off 5:off 6:off cgred 0:off 1:off 2:off 3:off 4:off 5:off 6:off xml definition -- <domain type="lxc"> <uuid>252a2dc5-452c-4e9c-a593-8c386c9f47e6</uuid> <name>instance-00000032</name>...

...ied creating a separate hierarchy "mykvm" and changed in sysconfig/libvirtd after that vm's memory cgroup reflects this.But it is not obeying "memory.limit_in_bytes" set in "mykvm" group,i als specified it in cgrules.conf and restarted it.If i change that in "/cgconfig/memory/mykvm/libvirt/qemu/memory.limit_in_bytes " its working.But that is dynamic as i am not able to find a way to mention that in "cgconfig.conf". How can i make sub hierarchies follow what is set in parent cgroup? eg: if change variables in "/cgconfig/memory/mykvm" then...

Hi there, Do you know if there is a way to modify how libvirt interacts with the cgroup? Because, I successfully add the /dev/net/tun support in my LXC container by doing: echo c 10:200 rwm >> /cgroup/libvirt/lxc/instance-00000005/devices.allow But when I restart the instance/LXC container, this option has gone. How can I make this persistant? Is there a configuration file? Thanks

...i am trying to set "memory.limit_in_bytes" for all process created by libvirt.But i am not able to achieve this on RHEL systems in Ubuntu servers creating memory cgroup for "libvirt-qemu" user solves the issue.But in case of RHEL system i tried to create a group by editing "cgconfig.conf" and then changing cgrules.conf and restarted cgconfig and libvirtd but still virtual machines are not following what is mentioned in config,instead they follow cgroup libvirt/qemu/virtualmachine-name ,is there any way i can set global cgroup values for all process rather editing each pro...

...p_device_acl = [ "/dev/null", "/dev/full", "/dev/zero", "/dev/random", "/dev/urandom", "/dev/ptmx", "/dev/kvm", "/dev/kqemu", "/dev/rtc", "/dev/hpet", "/dev/net/tun", ] /etc/cgconfig.conf mount { cpu = /dev/cgroup/cpu; cpuacct = /dev/cgroup/cpuacct; devices = /dev/cgroup/devices; # memory = /dev/cgroup/memory; blkio = /dev/cgroup/blkio; } When I'm running virsh, and want to change cpu shares I receive an error virsh # schedinfo --set cpu.shares=2048 test Scheduler...

Hi, I'm trying to use cgroups to limit the apache webserver but this doesn't seem to work as far as I can tell. I modified cgconfig.conf like this: group webserver { cpu { cpu.shares="250"; } } and addes this to cgrules.conf: *:httpd * webserver Looking into the "webserver" cgroup shows that the pid's of the httpd processes are correctly assign...

...n you can use its "slice" and "scope" concepts to setup grouping of VMs. If you have older systemd, then you have to setup groups manually. There's some guidance on setting up groups here http://libvirt.org/cgroups.html If you have systemd >= 205 then you can ignore cgconfig.conf entirely. For earlier version, you can use cgconfig.conf to setup the groups only. Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- h...

...of 1000000 i.e a ratio of 1/10 . still when I run a task (endless loop) in that group (cgexec -g cpu,cpuset:group1 ./test) it gets all the cpu core time that is assigned to it ( i watch via top utility) , so it seems that the quota set via the group does not take effect although I restart the cgconfig service . I also verified libcgroup is installed by: rpm -q libcgroup Am I missing something or top is not the right utility to watch the cpu usage in this case ? thanks Zvi Dubitzky Email:dubi at il.ibm.com

...ble to create subgroups for each VM, it's really great the cgroups support in libvirt. The problem is that I can only set the parameters of a given cgroup under the cpu controller if I'm logged in as root. I want another user to have that permission as well. I tried to modify the file /etc/cgconfig.conf to change the permissions. The file is exactly this: group libvirt { perm { admin { uid = opennebula; gid = opennebula; } task { uid = root;...

I have a RHEL6 that hosts many kvm virtual machines. It has been working fine for a couple years. I apply errata updates about once a week. In the last couple weeks, I've ran into a bug where the virtual machines start failing to start with a cgroup error message. If I reboot the host (very disruptive) then things start working normaly for a few days. Can I configure qemu/libvirt not to use

...e" and "scope" concepts to setup grouping > of VMs. If you have older systemd, then you have to setup groups > manually. There's some guidance on setting up groups here > > http://libvirt.org/cgroups.html > > If you have systemd >= 205 then you can ignore cgconfig.conf entirely. systemd 208-10 and libvirt 1.2.1-1 So you are telling me I spent hours and hours of reading for nothing ? GGGrrhhh. I use the slice concept (or partition map) with this file : machine-dahlia.slice I have been reading and reading again your mentioned link, and I think it is the...

...off 5:on 6:off abrt-oops 0:off 1:off 2:off 3:on 4:off 5:on 6:off abrtd 0:off 1:off 2:off 3:on 4:off 5:on 6:off acpid 0:off 1:off 2:on 3:on 4:on 5:on 6:off auditd 0:off 1:off 2:on 3:on 4:on 5:on 6:off cgconfig 0:off 1:off 2:on 3:on 4:on 5:on 6:off cpuspeed 0:off 1:on 2:on 3:on 4:on 5:on 6:off crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off haldaemon 0:off 1:off 2:off 3:on 4:on 5:on 6:off ip6tables 0:off 1:of...

Hi, We have upgraded the libvirt version from libvirt-1.0.5 to libvirt-1.0.6-1 on our linux machine. After this upgrade "virsh cpu-stats <domain>" command is not working on our HardWare. *virsh # cpu-stats test error: Failed to retrieve CPU statistics for domain 'test' error: internal error error accessing cgroup cpuacct for vcpu* ** *# cat /proc/cgroups #subsys_name

...ys in the statetab and this causes the machine to fail, as I have tried /sys in the rwtab. The latter increases the boot time to a point which is not usable. Trying /sys/fs/cgroup in rwtab seems to improve boot time but also causes the machine not to complete booting. I had some more success using cgconfig.conf, I was able to mount the memory cgroup to a local disk (each node has a local temp disk) and manipulate this using cgcreate but the cpu would not mount in the same fashion; the error was: Error: cannot mount cpu to /var/tmp/cgroup/cpu: Device or resource busy So my question; in this particula...

...dWare. > Since we have to fix this on top priority, can you please reply as soon as > possible. Please let us know if you need any further information from our > side. Libvirt will never attempt to mount any cgroups controllers. It delegates this task to the base OS. Historically the 'cgconfig' init script would be used. On distros which use systemd though, systemd will take care of this task. There's a bit more info here http://libvirt.org/cgroups.html Basically our recommendation is to mount all the controllers individually at /sys/fs/cgroup/<controllername> Regards,...

...concepts to setup grouping > > of VMs. If you have older systemd, then you have to setup groups > > manually. There's some guidance on setting up groups here > > > > http://libvirt.org/cgroups.html > > > > If you have systemd >= 205 then you can ignore cgconfig.conf entirely. > > > systemd 208-10 and libvirt 1.2.1-1 > > So you are telling me I spent hours and hours of reading for nothing ? GGGrrhhh. > > I use the slice concept (or partition map) with this file : > > machine-dahlia.slice > > I have been reading and r...

On Centos 6.4 x64,with libvirt-0.10.2-18.el6.x86_64 i am trying to set "memory.limit_in_bytes" for all qemu process. changed "cgconfig.conf" group mygroup{ perm { admin { uid = root; gid = root; } task { uid = qemu; gid = kvm; } } memory {...

Hello, I'm trying to use libvirt as a non-root user to obtain statistics on the CPU usage by VMs using the Python API. I'm performing basically the following steps: import libvirt conn = libvirt.openReadOnly(None) dom = conn.lookupByUUIDString('268e38ea-1bc7-41e4-c19e-8eff682e58e4') dom.getCPUStats(True, 0) However, they result in the following error: libvir: QEMU Driver