Docker does not know about our named cpuacct,cpu,cpuset cgroup
hierarchy with multiple subsystems in it. So to use them with docker
in integration-cli test TestRunWithCpuset inside docker container
we need to add symlinks to them in hack/dind script.
Example:
old version of parser will do:
cat /proc/1/cgroup
11:cpu,cpuacct,name=my_cpu_cpuacct:/
...
and create and mount this hierarchy to directory
/cgroup/cpu,cpuacct,name=my_cpu_cpuacct/
so docker cannot find it because it has strange name
in new parser directory will be same as on host
/cgroup/my_cpu_cpuacct
and have symlinks for docker to find it
/cgroup/cpu -> /cgroup/my_cpu_cpuacct
/cgroup/cpuacct -> /cgroup/my_cpu_cpuacct
in other case if where is no name
cat /proc/1/cgroup
11:cpu,cpuacct:/
...
mount will be same for both parsers
/cgroup/cpu,cpuacct
and new one will also create symlinks
/cgroup/cpu -> /cgroup/cpu,cpuacct
/cgroup/cpuacct -> /cgroup/cpu,cpuacct
Signed-off-by: Pavel Tikhomirov <ptikhomirov@parallels.com>
Upstream-commit: d322cd5dcb0ad480c974f4cc58d9d01c3d2801a7
Component: engine
8f565e6836