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23622a2ac8
1. deeper hierarchy has steep performance costs 2. init may be under /init, but containers should be under /lxc 3. in a nested container we like to bind-mount $cgroup_path/$c/$c.real into $cgroup_path - but task 1's cgroup is $c/$c.real, so a nested container would be in $c/$c.real/lxc, which would become /$c/$c.real/$c/$c.real/lxc when expanded 4. this pulls quite a bit of code (of mine) which is always nice Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
45 lines
1.5 KiB
Bash
Executable File
45 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# (C) Copyright Canonical 2011,2012
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# This is an example hook to mount all mounted cgroups in the
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# container. Only the container's own cgroup (not parents) will be
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# accessible to the container. You can enable this by adding
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# lxc.hook.mount = /usr/share/lxc/hooks/mountcgroups
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# to your container's configuration file.
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set -e
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c=$1
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d=/sys/fs/cgroup
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d2=$LXC_ROOTFS_MOUNT/${d}
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if [ ! -d "$d" ]; then
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exit 0
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fi
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mount -n -t tmpfs tmpfs ${d2}
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# XXX TODO - we'll need to account for other cgroup groups beside 'lxc',
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# i.e. 'build' or 'users/joe'.
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for dir in `/bin/ls $d`; do
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mkdir -p "${d}/${dir}/lxc/${c}/${c}.real"
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echo 1 > "${d}/${dir}/lxc/${c}/${c}.real/tasks"
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mkdir -p ${d2}/${dir}
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mount -n --bind "${d}/${dir}/lxc/${c}/${c}.real" "${d2}/${dir}"
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done
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