Changes between Version 54 and Version 55 of TipAndDoc/Linux/LXC

Timestamp:

Apr 23, 2016 4:35:05 PM (9 years ago)

Author:

mitty

Comment:

--

TipAndDoc/Linux/LXC

@@ -273 +273 @@
  * [[Image(lxde.png,33%)]]
 
- = munin plugin =
- * github:vajtsz/munin-plugins
-
- == lxc_proc ==
- * github:vajtsz/munin-plugins/blob/6a426b4bde7addcaf42d72a033e713d0f11776c0/squeeze/lxc_proc#L77
-  * Debian Squeezeと異なり、Ubuntu 12.04では{{{lxc-cgroup -t container_name tasks}}}が使えない
-
- * https://www.kernel.org/doc/Documentation/cgroups/cgroups.txt
- > Each cgroup is represented by a directory in the cgroup file system
- > containing the following files describing that cgroup:
- > 
- >  - tasks: list of tasks (by pid) attached to that cgroup.  This list
- >    is not guaranteed to be sorted.  Writing a thread id into this file
- >    moves the thread into this cgroup.
- >  - cgroup.procs: list of tgids in the cgroup.  This list is not
- >    guaranteed to be sorted or free of duplicate tgids, and userspace
- >    should sort/uniquify the list if this property is required.
- >    Writing a thread group id into this file moves all threads in that
- >    group into this cgroup.
- >  - notify_on_release flag: run the release agent on exit?
- >  - release_agent: the path to use for release notifications (this file
- >    exists in the top cgroup only)
-
- * まとめ
-  * lxc-cgroupコマンドを使わない場合、以下のsysfsにアクセスすると良い模様
-  * Debian 6.0: {{{/sys/fs/cgroup/<container>/tasks}}}
-  * Ubuntu 12.04 with fstab: {{{/sys/fs/cgroup/lxc/<container>/tasks}}}
-  * Ubuntu 12.04 with cgroup-lite: {{{/sys/fs/cgroup/cpuacct/lxc/<container>/tasks}}}
-  * Ubuntu 12.04 with cgroup-bin: {{{/sys/fs/cgroup/cpuacct/sysdefault/lxc/<container>/tasks}}}
-
- === Debian 6.0 ===
- * http://wiki.debian.org/LXC
- > Add this line to /etc/fstab
- > {{{
- > cgroup  /sys/fs/cgroup  cgroup  defaults  0   0
- > }}}
- > Try to mount it (a reboot solves an eventual "resource busy problem" in any case)
- > {{{
- > mount /sys/fs/cgroup
- > }}}
-
- * $ sudo lxc-start -d -n lxc-test
- * $ sudo lxc-cgroup -n lxc-test tasks
-{{{
-1432
-1569
-1571
-1598
-}}}
-
- * $ ls -1F /sys/fs/cgroup/
-{{{
-cgroup.procs
-cpuacct.stat
-cpuacct.usage
-cpuacct.usage_percpu
-cpuset.cpu_exclusive
-cpuset.cpus
-cpuset.mem_exclusive
-cpuset.mem_hardwall
-cpuset.memory_migrate
-cpuset.memory_pressure
-cpuset.memory_pressure_enabled
-cpuset.memory_spread_page
-cpuset.memory_spread_slab
-cpuset.mems
-cpuset.sched_load_balance
-cpuset.sched_relax_domain_level
-cpu.shares
-devices.allow
-devices.deny
-devices.list
-lxc-test/
-net_cls.classid
-notify_on_release
-release_agent
-tasks
-}}}
-  * /sys/fs/cgroup/lxc-test/ も同じ構造
- * $ cat /sys/fs/cgroup/lxc-test/tasks
-{{{
-1432
-1569
-1571
-1598
-}}}
-
- === Ubuntu 12.04 ===
- * Ubuntu 12.04 with {{{aptitude install -R lxc}}}
-  * cgroup関係のパッケージは{{{-R}}}をつけるとインストールされない
- * $ ls -1F /sys/fs/cgroup/
-  * N/A
- * $ sudo lxc-start -n lxc-test
-{{{
-lxc-start: failed to spawn 'lxc-test'
-}}}
-
- ==== /etc/fstab ====
- * Ubuntu 12.04 with /etc/fstab:{{{cgroup  /sys/fs/cgroup  cgroup  defaults  0   0}}}
-  * 起動時に自動でマウントされないため、{{{mount -a}}}する必要がある
-
- * $ sudo mount -a
- * $ sudo lxc-start -d -n lxc-test
- * $ sudo lxc-cgroup -n lxc-test tasks
-{{{
-lxc-cgroup: cgroup is not mounted
-lxc-cgroup: failed to retrieve value of 'tasks' for 'lxc-test'
-}}}
-
- * $ ls -1F /sys/fs/cgroup/
-{{{
-blkio.io_merged
-blkio.io_queued
-blkio.io_service_bytes
-blkio.io_serviced
-blkio.io_service_time
-blkio.io_wait_time
-blkio.reset_stats
-blkio.sectors
-blkio.throttle.io_service_bytes
-blkio.throttle.io_serviced
-blkio.throttle.read_bps_device
-blkio.throttle.read_iops_device
-blkio.throttle.write_bps_device
-blkio.throttle.write_iops_device
-mitty@lein:~$ ls -1F /sys/fs/cgroup/
-blkio.io_merged
-blkio.io_queued
-blkio.io_service_bytes
-blkio.io_serviced
-blkio.io_service_time
-blkio.io_wait_time
-blkio.reset_stats
-blkio.sectors
-blkio.throttle.io_service_bytes
-blkio.throttle.io_serviced
-blkio.throttle.read_bps_device
-blkio.throttle.read_iops_device
-blkio.throttle.write_bps_device
-blkio.throttle.write_iops_device
-blkio.time
-blkio.weight
-blkio.weight_device
-cgroup.clone_children
-cgroup.event_control
-cgroup.procs
-cpuacct.stat
-cpuacct.usage
-cpuacct.usage_percpu
-cpu.cfs_period_us
-cpu.cfs_quota_us
-cpu.rt_period_us
-cpu.rt_runtime_us
-cpuset.cpu_exclusive
-cpuset.cpus
-cpuset.mem_exclusive
-cpuset.mem_hardwall
-cpuset.memory_migrate
-cpuset.memory_pressure
-cpuset.memory_pressure_enabled
-cpuset.memory_spread_page
-cpuset.memory_spread_slab
-cpuset.mems
-cpuset.sched_load_balance
-cpuset.sched_relax_domain_level
-cpu.shares
-cpu.stat
-devices.allow
-devices.deny
-devices.list
-lxc/
-memory.failcnt
-memory.force_empty
-memory.limit_in_bytes
-memory.max_usage_in_bytes
-memory.memsw.failcnt
-memory.memsw.limit_in_bytes
-memory.memsw.max_usage_in_bytes
-memory.memsw.usage_in_bytes
-memory.move_charge_at_immigrate
-memory.numa_stat
-memory.oom_control
-memory.soft_limit_in_bytes
-memory.stat
-memory.swappiness
-memory.usage_in_bytes
-memory.use_hierarchy
-notify_on_release
-release_agent
-tasks
-}}}
-  * /sys/fs/cgroup/lxc/, /sys/fs/cgroup/lxc/lxc-test/ も同じ構造
- * $ cat /sys/fs/cgroup/lxc/lxc-test/tasks
-{{{
-2712
-2867
-2932
-2943
-2947
-2952
-2953
-2954
-2983
-3002
-3031
-3036
-3037
-3042
-3056
-3058
-}}}
-
- ==== cgroup-lite ====
- * Ubuntu 12.04 with {{{cgroup-lite}}}
-  * aptitude install時に-Rとしない場合、{{{cgroup-lite}}}がRecommendsからインストールされる
-  * /bin/cgroups-mount
-{{{
-mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
-}}}
- * $ sudo lxc-cgroup -n lxc-test tasks
-{{{
-lxc-cgroup: cgroup is not mounted
-lxc-cgroup: failed to retrieve value of 'tasks' for 'lxc-test'
-}}}
-
- * $ ls -1F /sys/fs/cgroup/
-{{{
-blkio/
-cpu/
-cpuacct/
-cpuset/
-devices/
-freezer/
-memory/
-perf_event/
-}}}
-  * $ find /sys/fs/cgroup/ | grep lxc-test/tasks | xargs wc
-{{{
-17 17 102 /sys/fs/cgroup/perf_event/lxc/lxc-test/tasks
-17 17 102 /sys/fs/cgroup/blkio/lxc/lxc-test/tasks
-17 17 102 /sys/fs/cgroup/freezer/lxc/lxc-test/tasks
-17 17 102 /sys/fs/cgroup/devices/lxc/lxc-test/tasks
-17 17 102 /sys/fs/cgroup/memory/lxc/lxc-test/tasks
-17 17 102 /sys/fs/cgroup/cpuacct/lxc/lxc-test/tasks
-17 17 102 /sys/fs/cgroup/cpu/lxc/lxc-test/tasks
-17 17 102 /sys/fs/cgroup/cpuset/lxc/lxc-test/tasks
-}}}
- * $ cat /sys/fs/cgroup/perf_event/lxc/lxc-test/tasks
-{{{
-17390
-17539
-17556
-17560
-17562
-17567
-17568
-17570
-17599
-17621
-17647
-17651
-17654
-17659
-17678
-17681
-17829
-}}}
-
- ==== cgroup-bin ====
- * Ubuntu 12.04 with {{{cgroup-bin}}}
-  * cgroup-binとcgroup-liteはコンフリクトする
-  * /etc/init/cgconfig.conf
-{{{
-mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroups /sys/fs/cgroup
-}}}
- * $ sudo lxc-cgroup -n lxc-test tasks
-{{{
-lxc-cgroup: cgroup is not mounted
-lxc-cgroup: failed to retrieve value of 'tasks' for 'lxc-test'
-}}}
-
- * $ ls -1F /sys/fs/cgroup/
-{{{
-cpu/
-cpuacct/
-devices/
-freezer/
-memory/
-}}}
-  * $ find /sys/fs/cgroup/ | grep lxc-test/tasks | xargs wc
-{{{
-16 16 80 /sys/fs/cgroup/freezer/sysdefault/lxc/lxc-test/tasks
-16 16 80 /sys/fs/cgroup/memory/sysdefault/lxc/lxc-test/tasks
-16 16 80 /sys/fs/cgroup/devices/sysdefault/lxc/lxc-test/tasks
-16 16 80 /sys/fs/cgroup/cpuacct/sysdefault/lxc/lxc-test/tasks
-16 16 80 /sys/fs/cgroup/cpu/sysdefault/lxc/lxc-test/tasks
-}}}
- * $ cat /sys/fs/cgroup/freezer/sysdefault/lxc/lxc-test/tasks
-{{{
-1296
-1390
-1434
-1461
-1470
-1471
-1473
-1474
-1502
-1524
-1552
-1562
-1563
-1566
-1580
-1582
-}}}
-
  = mount inside container =
  * コンテナの中ではAppArmorによってmountが禁止されているため、直接NFSマウントするにはAppArmorの再設定が必要