This page (revision-12) was last changed on 23-Apr-2022 17:06 by Harry Metske

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Lxc
Lxc

Version management

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At line 104 added 174 lines
! Stopping the container
You can, of course, shutdown the container itself when you are logged by issuing the {{shutdown}} command.\\
From the host you can issue:
{{{
lxc-shutdown -n ubuntu1
}}}
! Cloning the container
Cloning container {{ubuntu1}} to {{ubuntu2}} :
{{{
athena ~ # lxc-clone -o ubuntu1 -n ubuntu2
Tweaking configuration
Copying rootfs...
Updating rootfs...
'ubuntu2' created
}}}
! Destroying a container
{{{
athena ~ # lxc-destroy -n ubuntu2
Container ubuntu2 is running, aborting the deletion.
athena ~ # lxc-destroy -n ubuntu2 -f
athena ~ # lxc-list
RUNNING
ubuntu1
FROZEN
STOPPED
}}}
!! control groups
The {{lxc-cgroup}} allows you to set controls (constraints) on the container.\\
From the man page:
{{{
DESCRIPTION
lxc-cgroup get or set value from the control group associated with the container name.
If no [value] is specified, the value of the subsystem is displayed, otherwise it is set.
The lxc-cgroup does not assume the correctness of the subsystem name, it is up to the user to specify
the right subsystem name.
}}}
A few examples :
* show cpus:
{{{
athena ~ # lxc-cgroup -n ubuntu1 cpuset.cpu_exclusive
0
athena ~ # lxc-cgroup -n ubuntu1 cpuset.cpus
0
}}}
%%warning
More documentation/explanation needed here
%%
* limit/show blkio read bytes per second:
{{{
athena ~ # lxc-cgroup -n ubuntu1 blkio.throttle.read_bps_device "8:0 10000000"
athena ~ # lxc-cgroup -n ubuntu1 blkio.throttle.read_bps_device
8:0 10000000
}}}
The funny thing is that you can set these things on the fly. So for example try to do a {{ls -l /}} while logged in the container, and the set the {{blkio.throttle.read_bps_device}} to something like {{1000}}, you immediately see the thing slowing down dramatically.
You can see the available subsystem in {{/sys/fs/cgroup}} filesystem :
%%small
{{{
athena cgroup # find .|grep lxc/ubuntu1
./perf_event/lxc/ubuntu1
./perf_event/lxc/ubuntu1/cgroup.clone_children
./perf_event/lxc/ubuntu1/cgroup.event_control
./perf_event/lxc/ubuntu1/notify_on_release
./perf_event/lxc/ubuntu1/cgroup.procs
./perf_event/lxc/ubuntu1/tasks
./blkio/lxc/ubuntu1
./blkio/lxc/ubuntu1/blkio.io_queued
./blkio/lxc/ubuntu1/blkio.io_merged
./blkio/lxc/ubuntu1/blkio.io_wait_time
./blkio/lxc/ubuntu1/blkio.io_service_time
./blkio/lxc/ubuntu1/blkio.io_serviced
./blkio/lxc/ubuntu1/blkio.io_service_bytes
./blkio/lxc/ubuntu1/blkio.sectors
./blkio/lxc/ubuntu1/blkio.time
./blkio/lxc/ubuntu1/blkio.weight
./blkio/lxc/ubuntu1/blkio.weight_device
./blkio/lxc/ubuntu1/blkio.throttle.io_serviced
./blkio/lxc/ubuntu1/blkio.throttle.io_service_bytes
./blkio/lxc/ubuntu1/blkio.throttle.write_iops_device
./blkio/lxc/ubuntu1/blkio.throttle.read_iops_device
./blkio/lxc/ubuntu1/blkio.throttle.write_bps_device
./blkio/lxc/ubuntu1/blkio.throttle.read_bps_device
./blkio/lxc/ubuntu1/blkio.reset_stats
./blkio/lxc/ubuntu1/cgroup.clone_children
./blkio/lxc/ubuntu1/cgroup.event_control
./blkio/lxc/ubuntu1/notify_on_release
./blkio/lxc/ubuntu1/cgroup.procs
./blkio/lxc/ubuntu1/tasks
./freezer/lxc/ubuntu1
./freezer/lxc/ubuntu1/freezer.state
./freezer/lxc/ubuntu1/cgroup.clone_children
./freezer/lxc/ubuntu1/cgroup.event_control
./freezer/lxc/ubuntu1/notify_on_release
./freezer/lxc/ubuntu1/cgroup.procs
./freezer/lxc/ubuntu1/tasks
./devices/lxc/ubuntu1
./devices/lxc/ubuntu1/devices.list
./devices/lxc/ubuntu1/devices.deny
./devices/lxc/ubuntu1/devices.allow
./devices/lxc/ubuntu1/cgroup.clone_children
./devices/lxc/ubuntu1/cgroup.event_control
./devices/lxc/ubuntu1/notify_on_release
./devices/lxc/ubuntu1/cgroup.procs
./devices/lxc/ubuntu1/tasks
./memory/lxc/ubuntu1
./memory/lxc/ubuntu1/memory.memsw.failcnt
./memory/lxc/ubuntu1/memory.memsw.limit_in_bytes
./memory/lxc/ubuntu1/memory.memsw.max_usage_in_bytes
./memory/lxc/ubuntu1/memory.memsw.usage_in_bytes
./memory/lxc/ubuntu1/memory.oom_control
./memory/lxc/ubuntu1/memory.move_charge_at_immigrate
./memory/lxc/ubuntu1/memory.swappiness
./memory/lxc/ubuntu1/memory.use_hierarchy
./memory/lxc/ubuntu1/memory.force_empty
./memory/lxc/ubuntu1/memory.stat
./memory/lxc/ubuntu1/memory.failcnt
./memory/lxc/ubuntu1/memory.soft_limit_in_bytes
./memory/lxc/ubuntu1/memory.limit_in_bytes
./memory/lxc/ubuntu1/memory.max_usage_in_bytes
./memory/lxc/ubuntu1/memory.usage_in_bytes
./memory/lxc/ubuntu1/cgroup.clone_children
./memory/lxc/ubuntu1/cgroup.event_control
./memory/lxc/ubuntu1/notify_on_release
./memory/lxc/ubuntu1/cgroup.procs
./memory/lxc/ubuntu1/tasks
./cpuacct/lxc/ubuntu1
./cpuacct/lxc/ubuntu1/cpuacct.stat
./cpuacct/lxc/ubuntu1/cpuacct.usage_percpu
./cpuacct/lxc/ubuntu1/cpuacct.usage
./cpuacct/lxc/ubuntu1/cgroup.clone_children
./cpuacct/lxc/ubuntu1/cgroup.event_control
./cpuacct/lxc/ubuntu1/notify_on_release
./cpuacct/lxc/ubuntu1/cgroup.procs
./cpuacct/lxc/ubuntu1/tasks
./cpu/lxc/ubuntu1
./cpu/lxc/ubuntu1/cpu.rt_period_us
./cpu/lxc/ubuntu1/cpu.rt_runtime_us
./cpu/lxc/ubuntu1/cpu.stat
./cpu/lxc/ubuntu1/cpu.cfs_period_us
./cpu/lxc/ubuntu1/cpu.cfs_quota_us
./cpu/lxc/ubuntu1/cpu.shares
./cpu/lxc/ubuntu1/cgroup.clone_children
./cpu/lxc/ubuntu1/cgroup.event_control
./cpu/lxc/ubuntu1/notify_on_release
./cpu/lxc/ubuntu1/cgroup.procs
./cpu/lxc/ubuntu1/tasks
./cpuset/lxc/ubuntu1
./cpuset/lxc/ubuntu1/cpuset.memory_spread_slab
./cpuset/lxc/ubuntu1/cpuset.memory_spread_page
./cpuset/lxc/ubuntu1/cpuset.memory_pressure
./cpuset/lxc/ubuntu1/cpuset.memory_migrate
./cpuset/lxc/ubuntu1/cpuset.sched_relax_domain_level
./cpuset/lxc/ubuntu1/cpuset.sched_load_balance
./cpuset/lxc/ubuntu1/cpuset.mem_hardwall
./cpuset/lxc/ubuntu1/cpuset.mem_exclusive
./cpuset/lxc/ubuntu1/cpuset.cpu_exclusive
./cpuset/lxc/ubuntu1/cpuset.mems
./cpuset/lxc/ubuntu1/cpuset.cpus
./cpuset/lxc/ubuntu1/cgroup.clone_children
./cpuset/lxc/ubuntu1/cgroup.event_control
./cpuset/lxc/ubuntu1/notify_on_release
./cpuset/lxc/ubuntu1/cgroup.procs
./cpuset/lxc/ubuntu1/tasks
}}} %%
At line 328 added one line
! TODO => how to get network access to the container(s) from other hosts than the "hypervisor" host.
This page (revision-12) was last changed on 23-Apr-2022 17:06 by Harry MetskeTop