[MESOS-6422] cgroups_tests not correctly tearing down testing hierarchies

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: containerization
• Labels: cgroups
• Assignee: Unassigned
• Reporter: Yan Xu
• Created: 19/Oct/16 22:41
• Updated: 06/Jul/18 21:27

Description

We currently do the following in CgroupsTest::TearDownTestCase()

static void TearDownTestCase()
{
  AWAIT_READY(cgroups::cleanup(TEST_CGROUPS_HIERARCHY));
}

One of its derived test CgroupsNoHierarchyTest treats TEST_CGROUPS_HIERARCHY as a hierarchy so it's able to clean it up as a hierarchy.

However another derived test CgroupsAnyHierarchyTest would create new hierarchies (if none is available) using TEST_CGROUPS_HIERARCHY as a parent directory (i.e., base hierarchy) and not as a hierarchy, so when it's time to clean up, it fails:

[       OK ] CgroupsAnyHierarchyTest.ROOT_CGROUPS_Subsystems (1 ms)
../../src/tests/containerizer/cgroups_tests.cpp:88: Failure
(cgroups::cleanup(TEST_CGROUPS_HIERARCHY)).failure(): Operation not permitted