def get_container_settings(name, status=None):
"""
returns a dict of all utils settings for a container
status is optional and should be set to RUNNING to retrieve ipv4 config (if unset)
"""
filename = '{}/{}/config'.format(lxcdir(), name)
if not file_exist(filename):
return False
config = ConfigParser.SafeConfigParser()
config.readfp(FakeSection(open(filename)))
cfg = {}
# for each key in cgroup_ext add value to cfg dict and initialize values
for options in cgroup_ext.keys():
if config.has_option('DEFAULT', cgroup_ext[options][0]):
cfg[options] = config.get('DEFAULT', cgroup_ext[options][0])
else:
cfg[options] = '' # add the key in dictionary anyway to match form
# if ipv4 is unset try to determinate it
if cfg['ipv4'] == '' and status == 'RUNNING':
cmd = ['lxc-ls --fancy --fancy-format name,ipv4|grep -w \'%s\\s\' | awk \'{ print $2 }\'' % name]
try:
cfg['ipv4'] = subprocess.check_output(cmd, shell=True)
except subprocess.CalledProcessError:
cfg['ipv4'] = ''
# parse memlimits to int
cfg['memlimit'] = re.sub(r'[a-zA-Z]', '', cfg['memlimit'])
cfg['swlimit'] = re.sub(r'[a-zA-Z]', '', cfg['swlimit'])
return cfg
def push_config_value(key, value, container=None):
"""
replace a var in a container config file
"""
from lwp.utils import cgroup_ext
def save_cgroup_devices(filename=None):
"""
returns multiple values (lxc.cgroup.devices.deny and lxc.cgroup.devices.allow) in a list.
because ConfigParser cannot make this...
"""
if filename:
values = []
i = 0
with open(filename, 'r') as load:
read = load.readlines()
while i < len(read):
if not read[i].startswith('#'):
if not (read[i] in values):
if re.match(
'lxc.cgroup.devices.deny|lxc.cgroup.devices.allow|lxc.mount.entry|lxc.cap.drop',
read[i]):
values.append(read[i])
i += 1
return values
if container:
filename = '{}/{}/config'.format(lxcdir(), container)
save = save_cgroup_devices(filename=filename)
normalized = NormalizeConfig(filename).read()
config = ConfigParser()
config.readfp(normalized)
if not value:
config.remove_option('DEFAULT', key)
elif key == cgroup_ext['memlimit'][
0] or key == cgroup_ext['swlimit'][0] and value is not False:
config.set('DEFAULT', key, '%sM' % value)
else:
config.set('DEFAULT', key, '%s' % value)
# Bugfix (can't duplicate keys with config parser)
if config.has_option('DEFAULT', cgroup_ext['deny'][0]):
config.remove_option('DEFAULT', cgroup_ext['deny'][0])
if config.has_option('DEFAULT', cgroup_ext['allow'][0]):
config.remove_option('DEFAULT', cgroup_ext['allow'][0])
if config.has_option('DEFAULT', 'lxc.cap.drop'):
config.remove_option('DEFAULT', 'lxc.cap.drop')
if config.has_option('DEFAULT', 'lxc.mount.entry'):
config.remove_option('DEFAULT', 'lxc.mount.entry')
with open(filename, 'w') as configfile:
config.write(configfile)
del_section(filename=filename)
with open(filename, "a") as configfile:
configfile.writelines(save)
def push_config_value(key, value, container=None):
"""
replace a var in a container config file
"""
def save_cgroup_devices(filename=None):
"""
returns multiple values (lxc.cgroup.devices.deny and lxc.cgroup.devices.allow) in a list.
because ConfigParser cannot make this...
"""
if filename:
values = []
i = 0
with open(filename, 'r') as load:
read = load.readlines()
while i < len(read):
if not read[i].startswith('#'):
if not (read[i] in values):
if re.match('lxc.cgroup.devices.deny|lxc.cgroup.devices.allow|lxc.mount.entry|lxc.cap.drop', read[i]):
values.append(read[i])
i += 1
return values
if container:
filename = '{}/{}/config'.format(lxcdir(), container)
save = save_cgroup_devices(filename=filename)
config = ConfigParser.RawConfigParser()
config.readfp(FakeSection(open(filename)))
if not value:
config.remove_option('DEFAULT', key)
elif key == cgroup_ext['memlimit'][0] or key == cgroup_ext['swlimit'][0] and value is not False:
config.set('DEFAULT', key, '%sM' % value)
else:
config.set('DEFAULT', key, value)
# Bugfix (can't duplicate keys with config parser)
if config.has_option('DEFAULT', cgroup_ext['deny'][0]):
config.remove_option('DEFAULT', cgroup_ext['deny'][0])
if config.has_option('DEFAULT', cgroup_ext['allow'][0]):
config.remove_option('DEFAULT', cgroup_ext['allow'][0])
if config.has_option('DEFAULT', 'lxc.cap.drop'):
config.remove_option('DEFAULT', 'lxc.cap.drop')
if config.has_option('DEFAULT', 'lxc.mount.entry'):
config.remove_option('DEFAULT', 'lxc.mount.entry')
with open(filename, 'wb') as configfile:
config.write(configfile)
del_section(filename=filename)
with open(filename, "a") as configfile:
configfile.writelines(save)
def host_disk_usage(partition=None):
"""
returns a dict of disk usage values
{'total': usage[1],
'used': usage[2],
'free': usage[3],
'percent': usage[4]}
"""
partition = lxcdir()
usage = subprocess.check_output(['df -h %s' % partition], shell=True).split('\n')[1].split()
return {'total': usage[1],
'used': usage[2],
'free': usage[3],
'percent': usage[4]}
def get_container_settings(name):
"""
returns a dict of all utils settings for a container
"""
filename = '{}/{}/config'.format(lxc.lxcdir(), name)
if not file_exist(filename):
return False
config = ConfigParser.SafeConfigParser()
config.readfp(FakeSection(open(filename)))
# start with bucket token, as this is not from the config file
cfg = {'bucket': get_bucket_token(name)}
# for each key in CGROUP_EXT add value to cfg dict and initialize values
for options in CGROUP_EXT.keys():
if config.has_option('DEFAULT', CGROUP_EXT[options][0]):
cfg[options] = config.get('DEFAULT', CGROUP_EXT[options][0])
else:
# add the key in dictionary anyway to match form
if options == 'loglevel':
cfg[options] = '5' # default loglevel is 5 (error)
else:
cfg[options] = '' # default for all other missing fields
# if ipv4 is unset try to determine it
if cfg['ipv4'] == '':
cmd = ['lxc-ls --fancy --fancy-format name,ipv4|grep \'%s\' |egrep -o \'[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+\'' % name]
try:
cfg['ipv4'] = subprocess.check_output(cmd, shell=True)
except subprocess.CalledProcessError:
cfg['ipv4'] = ''
# parse memlimits to ints
cfg['memlimit'] = re.sub(r'[a-zA-Z]', '', cfg['memlimit'])
cfg['swlimit'] = re.sub(r'[a-zA-Z]', '', cfg['swlimit'])
# the form requires these to be actual ints
if cfg['memlimit'] != '':
cfg['memlimit'] = int(cfg['memlimit'])
if cfg['swlimit'] != '':
cfg['swlimit'] = int(cfg['swlimit'])
# convert internal lxc values to boolean
cfg['start_auto'] = True if cfg['start_auto'] is '1' else False
cfg['flags'] = True if cfg['flags'] == 'up' else False
return cfg
