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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import glob
import pathlib
import pwd
import re
import time
import plugins
class Plugin(plugins.BasePlugin):
__name__ = 'plesk-cgroups'
def run(self, *unused):
accounting = {}
cache = self.get_agent_cache()
uid_re = re.compile('\d+')
# This silently depends on cgroup mounted virtual file systems
# and SystemD user slices
sysfs_prefix = '/sys/fs/cgroup/'
sysfs_suffix = 'user.slice/user-*.slice'
for user_slice in (
glob.glob(sysfs_prefix + sysfs_suffix) + # cgroup v2
glob.glob(sysfs_prefix + 'systemd/' + sysfs_suffix) # cgroup v1
):
accounting[user_slice] = {}
if not user_slice in cache:
cache[user_slice] = {}
accounting[user_slice]['uid'] = uid = \
int(uid_re.search(user_slice).group())
# Resolve uid to username
try:
accounting[user_slice]['username'] = pwd.getpwuid(uid).pw_name
except KeyError:
# There's no guarantee that the uid has a name
pass
# This silently depends on the corresponding CGroup controllers
# being individually enabled
# Memory accounting
try:
# cgroup v2
with pathlib.Path(user_slice, 'memory.current').open() as f:
accounting[user_slice]['memory.current'] = \
int(f.read().strip())
except FileNotFoundError:
try:
# cgroup v1
with pathlib.Path(
sysfs_prefix,
'memory',
'user.slice',
'user-{}.slice'.format(uid),
'memory.usage_in_bytes'
).open() as f:
accounting[user_slice]['memory.usage_in_bytes'] = \
int(f.read().strip())
except FileNotFoundError:
pass
# IO accounting
try:
# cgroup v2
with pathlib.Path(user_slice, 'io.stat').open() as f:
accounting[user_slice]['io.stat'] = a = {}
if not 'io.stat' in cache[user_slice]:
cache[user_slice]['io.stat'] = c = {}
for line in f.readlines():
devnum, metrics = line.split(maxsplit=1)
if not devnum in a:
a[devnum] = {}
a[devnum]['ts'] = time.time()
if not devnum in c:
c[devnum] = {}
for kv in metrics.split():
k, v = kv.split('=')
a[devnum][k] = self.absolute_to_per_second(
k, int(v), c[devnum]
)
c[devnum][k] = int(v)
except FileNotFoundError:
try:
# cgroup v1
with pathlib.Path(
sysfs_prefix,
'blkio',
'user.slice',
'user-{}.slice'.format(uid),
'blkio.throttle.io_service_bytes'
).open() as f:
accounting[user_slice]\
['blkio.throttle.io_service_bytes'] = a = {}
if not 'blkio.throttle.io_service_bytes' \
in cache[user_slice]:
cache[user_slice]\
['blkio.throttle.io_service_bytes'] = c = {}
for line in f.readlines():
try:
devnum, k, v = line.split()
except ValueError:
# The last line is "Total",
# it has only 2 values and is ignored
pass
if not devnum in a:
a[devnum] = {}
a[devnum]['ts'] = time.time()
if not devnum in c:
c[devnum] = {}
a[devnum][k] = self.absolute_to_per_second(
k, int(v), c[devnum]
)
c[devnum][k] = int(v)
except FileNotFoundError:
pass
# CPU accounting
try:
# cgroup v2
with pathlib.Path(user_slice, 'cpu.stat').open() as f:
accounting[user_slice]['cpu.stat'] = a = {}
if not 'cpu.stat' in cache[user_slice]:
cache[user_slice]['cpu.stat'] = c = {}
a['ts'] = time.time()
for line in f.readlines():
k, v = line.split()
a[k] = self.absolute_to_per_second(k, int(v), c)
c[k] = int(v)
except FileNotFoundError:
try:
# cgroup v1
with pathlib.Path(
sysfs_prefix,
'cpu',
'user.slice',
'user-{}.slice'.format(uid),
'cpuacct.stat'
).open() as f:
accounting[user_slice]['cpuacct.stat'] = a = {}
if not 'cpuacct.stat' in cache[user_slice]:
cache[user_slice]['cpuacct.stat'] = c = {}
a['ts'] = time.time()
for line in f.readlines():
k, v = line.split()
a[k] = self.absolute_to_per_second(k, int(v), c)
c[k] = int(v)
except FileNotFoundError:
pass
self.set_agent_cache(cache)
return accounting
if __name__ == '__main__':
Plugin().execute()