def test_find_cgroup_devices_path_ubuntu(self, mock):
mock.return_value = [
'cgroup /cgroup tmpfs rw,relatime,mode=755 0 0',
'cgroup /cgroup/devices cgroup rw,relatime,devices,' +
'clone_children 0 0']
path = hostinfo.get_cgroup_devices_path()
self.assertEqual('/cgroup/devices', path)
def test_find_cgroup_devices_path_centos(self, mock):
mock.return_value = [
'none /sys/fs/cgroup cgroup rw,relatime,perf_event,'
'blkio,net_cls,freezer,devices,memory,cpuacct,cpu,'
'cpuset 0 0']
path = hostinfo.get_cgroup_devices_path()
self.assertEqual('/sys/fs/cgroup', path)
def test_find_cgroup_devices_path_ubuntu(self, mock):
mock.return_value = [
'cgroup /cgroup tmpfs rw,relatime,mode=755 0 0',
'cgroup /cgroup/devices cgroup rw,relatime,devices,' +
'clone_children 0 0'
]
path = hostinfo.get_cgroup_devices_path()
self.assertEqual('/cgroup/devices', path)
def _find_container_pid(self, container_id):
cgroup_path = hostinfo.get_cgroup_devices_path()
lxc_path = os.path.join(cgroup_path, 'lxc')
tasks_path = os.path.join(lxc_path, container_id, 'tasks')
n = 0
while True:
# NOTE(samalba): We wait for the process to be spawned inside the
# container in order to get the the "container pid". This is
# usually really fast. To avoid race conditions on a slow
# machine, we allow 10 seconds as a hard limit.
if n > 20:
return
try:
with open(tasks_path) as f:
pids = f.readlines()
if pids:
return int(pids[0].strip())
except IOError:
pass
time.sleep(0.5)
n += 1