import logger
# Base dir for libvirt
-BASE_DIR = '/cgroup/libvirt/'
+BASE_DIR = '/sys/fs/cgroup'
+SUB_SYSTEMS = ['blkio', 'freezer', 'devices', 'memory', 'cpu,cpuacct', 'cpuset']
VIRT_TECHS = ['lxc']
# Global cgroup mapping.
(event.name, event.path))
-logger.verbose("Cgroups: Recognizing already existing cgroups...")
-for virt in VIRT_TECHS:
- filenames = os.listdir(os.path.join(BASE_DIR, virt))
- for filename in filenames:
- path = os.path.join(BASE_DIR, virt, filename)
- if os.path.isdir(path):
- CGROUPS[filename] = path
+#logger.verbose("Cgroups: Recognizing already existing cgroups...")
+#for virt in VIRT_TECHS:
+# filenames = os.listdir(os.path.join(BASE_DIR, virt))
+# for filename in filenames:
+# path = os.path.join(BASE_DIR, virt, filename)
+# if os.path.isdir(path):
+# CGROUPS[filename] = path
-logger.verbose("Cgroups: Initializing watchers...")
-wm = pyinotify.WatchManager()
-notifier = pyinotify.ThreadedNotifier(wm, CgroupWatch())
-for virt in VIRT_TECHS:
- wdd = wm.add_watch(os.path.join(BASE_DIR, virt),
- pyinotify.IN_DELETE | pyinotify.IN_CREATE,
- rec=False)
-notifier.daemon = True
-notifier.start()
+#logger.verbose("Cgroups: Initializing watchers...")
+#wm = pyinotify.WatchManager()
+#notifier = pyinotify.ThreadedNotifier(wm, CgroupWatch())
+#for virt in VIRT_TECHS:
+# wdd = wm.add_watch(os.path.join(BASE_DIR, virt),
+# pyinotify.IN_DELETE | pyinotify.IN_CREATE,
+# rec=False)
+#notifier.daemon = True
+#notifier.start()
+
+def get_cgroup_paths():
+ cpusetBase = os.path.join(BASE_DIR, 'cpuset', 'libvirt', 'lxc')
+ return filter(os.path.isdir,
+ map(lambda f: os.path.join(cpusetBase, f),
+ os.listdir(cpusetBase)))
def get_cgroup_path(name):
- """ Returns the base path for the cgroup with a specific name """
- assert CGROUPS.has_key(name), \
- "No sliver %s managed by libvirt through cgroup!" % name
- return CGROUPS[name]
+ """ Returns the base path for the cgroup with a specific name or None."""
+ return reduce(lambda a, b: b if os.path.basename(b) == name else a,
+ get_cgroup_paths(), None)
def get_base_path():
return BASE_DIR
def get_cgroups():
""" Returns the list of cgroups active at this moment on the node """
- return CGROUPS.keys()
+ return map(os.path.basename, get_cgroup_paths())
def write(name, key, value):
""" Writes a value to the file key with the cgroup with name """
""" Appends a value to the file key with the cgroup with name """
base_path = get_cgroup_path(name)
with open(os.path.join(base_path, key), 'a') as f:
- print >>f, value
+ print >>f, value