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LXC.md

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LXC howto

  • instalar los requerimientos de LXC aptitude install bridge-utils libvirt-bin debootstrap

  • instalar LXC apt-get install lxc

  • agregar los cgroups al fstab: cgroup /sys/fs/cgroup cgroup defaults 0 0

  • y montar: mount -a

  • verificar que ha sido creado cgroup:

ls /sys/fs/cgroup/ blkio.io_merged blkio.reset_stats cgroup.event_control cpuset.cpus cpuset.memory_spread_page devices.allow tasks blkio.io_queued blkio.sectors cgroup.procs cpuset.mem_exclusive cpuset.memory_spread_slab devices.deny blkio.io_service_bytes blkio.time cpuacct.stat cpuset.mem_hardwall cpuset.mems devices.list blkio.io_serviced blkio.weight cpuacct.usage cpuset.memory_migrate cpuset.sched_load_balance net_cls.classid blkio.io_service_time blkio.weight_device cpuacct.usage_percpu cpuset.memory_pressure cpuset.sched_relax_domain_level notify_on_release blkio.io_wait_time cgroup.clone_children cpuset.cpu_exclusive cpuset.memory_pressure_enabled cpu.shares release_agent i

  • agregar a default/grub: cgroup_enable=memory swapaccount=1

  • actualizar grub update-grub

  • reiniciar reboot

== Particion para LXC ==

  • formatear óptimamente con LXC mkfs.xfs -l internal,lazy-count=1,size=256m -b size=4096 -d sunit=8,swidth=16 -f -L lxc /dev/vgpheno/lxc

  • Y montar en la partición dónde irán los contenedores LXC: /dev/vgpheno/lxc /srv/lxc xfs rw,noatime,nodiratime,attr2,nobarrier,logbufs=8,sunit=8,swidth=16,logbsize=256k,largeio,inode64,swalloc,noquota,allocsize=16M 0 0

== Configuracion ==

  • verificar que LXC podría funcionar en este equipo:

lxc-checkconfig

Kernel config /proc/config.gz not found, looking in other places... Found kernel config file /boot/config-3.2.0-4-amd64 --- Namespaces --- Namespaces: enabled Utsname namespace: enabled Ipc namespace: enabled Pid namespace: enabled User namespace: enabled Network namespace: enabled Multiple /dev/pts instances: enabled

--- Control groups --- Cgroup: enabled Cgroup clone_children flag: enabled Cgroup device: enabled Cgroup sched: enabled Cgroup cpu account: enabled Cgroup memory controller: enabled Cgroup cpuset: enabled

--- Misc --- Veth pair device: enabled Macvlan: enabled Vlan: enabled File capabilities: enabled

Note : Before booting a new kernel, you can check its configuration usage : CONFIG=/path/to/config /usr/bin/lxc-checkconfig

  • Verificar que todos los requerimientos (como memory o cpuset), han sido montados:

grep cgroup /proc/self/mounts cgroup /sys/fs/cgroup cgroup rw,relatime,perf_event,blkio,net_cls,freezer,devices,memory,cpuacct,cpu,cpuset 0 0

Instalacion de dependencias (Debian)

  • instalar las dependencias

apt-get install debootstrap lsb-release wget rsync curl yum rpm

Listo!, ya puedes hacer uso de los LXC-tools.