forked from cloudlinux/kuberdock-platform
/
fslimit.py
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/
fslimit.py
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# KuberDock - is a platform that allows users to run applications using Docker
# container images and create SaaS / PaaS based on these applications.
# Copyright (C) 2017 Cloud Linux INC
#
# This file is part of KuberDock.
#
# KuberDock is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# KuberDock is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with KuberDock; if not, see <http://www.gnu.org/licenses/>.
"""
Usage: fslimit.py containers|storage [name=limit ...]
Examples:
fslimit.py containers a00750a46fbb3c5bd512c790031dca02ef87359ae3cb54f70bdb2a2f6e0f66a9=1g
fslimit.py storage /var/lib/kuberdock/storage/23/mydrive1=5g
fslimit.py storage mydrive1_23=3g
"""
import glob
import os
import re
import subprocess
import sys
OVERLAY = '/var/lib/docker/overlay'
PROJECTS = '/etc/projects'
PROJID = '/etc/projid'
PROJECT_PATTERN = re.compile(r'^(?P<id>\d+):(?P<path>.+)$')
PROJID_PATTERN = re.compile(r'^(?P<name>.+):(?P<id>\d+)$')
STORAGE = '/var/lib/kuberdock/storage'
def _containers():
containers = {}
target_path = os.path.join(OVERLAY, '*', 'upper')
for target in glob.glob(target_path):
container_path = os.path.dirname(target)
if not container_path.endswith('-init'):
container_name = os.path.basename(container_path)
containers[container_name] = container_path
return containers
def _exit(message, code, usage=False):
print message
if usage:
print __doc__
sys.exit(code)
def _fs():
mounts = {}
with open('/proc/mounts') as mounts_file:
for mount in mounts_file.readlines():
device, mount_point, file_system, _options = mount.split()[:4]
mounts[mount_point] = {
'device': device,
'mount_point': mount_point,
'file_system': file_system,
'options': _options.split(','),
}
return mounts
def _limits(parent):
limits = {}
for limit in sys.argv[2:]:
name, _, value = limit.partition('=')
# Use given names as paths if it represent an absolute path. Otherwise
# use it as subdir for the parent dir.
if name.startswith('/'):
path = name
else:
path = os.path.join(parent, name)
limits[name] = {'limit': value, 'path': path}
return limits
def _mount(path):
while not os.path.ismount(path):
path = os.path.dirname(path)
return path
def _storage():
storage = {}
target_path = os.path.join(STORAGE, '*')
for storage_path in glob.glob(target_path):
# we expect here directories like <STORAGE>/<user id>/<user storage>
if not os.path.isdir(storage_path):
continue
subdir = os.path.basename(storage_path)
try:
int(subdir)
except (TypeError, ValueError):
continue
user_storage_parent = os.path.join(storage_path, '*')
for lstorage in glob.glob(user_storage_parent):
storage[lstorage] = lstorage
return storage
FSLIMIT_TARGETS = {
'containers': (OVERLAY, _containers),
'storage': (STORAGE, _storage,),
}
def _target():
"""Returns tuple of Parent directory, method for getting subdirs and
flag which determine the way of working with paths - use absolute
"""
if len(sys.argv) < 2:
_exit('No target specified', 3, usage=True)
target = sys.argv[1]
if target not in FSLIMIT_TARGETS:
_exit('Unknown target', 4, usage=True)
return target
def check_xfs(fs):
fs_type = fs['file_system']
if fs_type != 'xfs':
_exit('Only XFS supported as backing filesystem', 1)
def check_prjquota(fs):
if 'prjquota' not in fs['options']:
_exit('Enable project quota for {0}'.format(fs['device']), 2)
def fslimit(fs, parent, dirs, abspath=False):
delete = set()
max_id = 0
projects = set()
projects_lines = []
projid_lines = []
if os.path.exists(PROJECTS) and os.path.exists(PROJID):
with open(PROJECTS) as projects_file:
for project in projects_file.read().splitlines():
project_match = PROJECT_PATTERN.match(project)
if project_match:
project_dict = project_match.groupdict()
id_ = int(project_dict['id'])
path = project_dict['path']
if path.startswith(parent):
if abspath:
name = path
else:
name = os.path.basename(path)
if name not in dirs:
delete.add(id_)
continue
projects.add(name)
max_id = max([max_id, id_])
projects_lines.append(project)
with open(PROJID) as projid_file:
for projid in projid_file.read().splitlines():
projid_match = PROJID_PATTERN.match(projid)
if projid_match:
projid_dict = projid_match.groupdict()
id_ = int(projid_dict['id'])
if id_ in delete:
continue
max_id = max([max_id, id_])
projid_lines.append(projid)
new = _limits(parent)
for name, data in new.iteritems():
if name not in projects:
max_id += 1
projects_lines.append('{0}:{1}'.format(max_id, data['path']))
projid_lines.append('{0}:{1}'.format(name, max_id))
with open(PROJECTS, 'w') as projects_file:
projects_file.writelines(l + os.linesep for l in projects_lines)
with open(PROJID, 'w') as projid_file:
projid_file.writelines(l + os.linesep for l in projid_lines)
for name, data in new.items():
project = 'project -s {0}'.format(name)
limit = 'limit -p bsoft={0} bhard={0} {1}'.format(data['limit'], name)
for c in project, limit:
subprocess.call(['xfs_quota', '-x', '-c', c, fs['mount_point']])
if __name__ == '__main__':
target_ = _target()
parent_, get_dirs = FSLIMIT_TARGETS[target_]
use_abspath = False
if target_ == 'storage':
use_abspath = True
fs_ = _fs()[_mount(parent_)]
check_xfs(fs_)
check_prjquota(fs_)
fslimit(fs_, parent_, get_dirs(), abspath=use_abspath)