Pavel Tikhomirov d322cd5dcb docker-tests: mount hierarchies and make symlinks for subsystems ...

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>

2015-03-31 15:49:10 +03:00

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