[server] Make connection pooler configurable and set better default values
Drop the configuration connections-pool-size and add new configurations options:
* connections-pool-min-size. Set to 0 by default so we open connections only
when needed. This avoid opening min-size*processes connections at startup,
which is, it think, a good default.
* connections-pool-max-size. Set to 0 (unlimited) by default, so we move the
bottleneck to postgresql.
* connections-idle-timeout. Set to 10 minutes. I don't have arguments about
this except that this is the default in pgbouncer.
# copyright 2003-2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""the cubicweb-ctl tool, based on logilab.common.clcommands to
provide a pluggable commands system.
"""
# *ctl module should limit the number of import to be imported as quickly as
# possible (for cubicweb-ctl reactivity, necessary for instance for usable bash
# completion). So import locally in command helpers.
import os
import sys
import traceback
from warnings import filterwarnings
from os import listdir
from os.path import exists, join, isdir
try:
from os import kill, getpgid
except ImportError:
def kill(*args):
"""win32 kill implementation"""
def getpgid():
"""win32 getpgid implementation"""
from logilab.common.clcommands import CommandLine
from logilab.common.shellutils import ASK
from logilab.common.configuration import merge_options
from logilab.common.decorators import clear_cache
from cubicweb import ConfigurationError, ExecutionError, BadCommandUsage, utils
from cubicweb.cwconfig import CubicWebConfiguration as cwcfg, CONFIGURATIONS
from cubicweb.server import set_debug
from cubicweb.toolsutils import Command, rm, create_dir, underline_title
from cubicweb.__pkginfo__ import version as cw_version
LOG_LEVELS = ('debug', 'info', 'warning', 'error')
DBG_FLAGS = ('RQL', 'SQL', 'REPO', 'HOOKS', 'OPS', 'SEC', 'MORE', 'ALL')
# don't check duplicated commands, it occurs when reloading site_cubicweb
CWCTL = CommandLine('cubicweb-ctl', 'The CubicWeb swiss-knife.',
version=cw_version, check_duplicated_command=False)
def wait_process_end(pid, maxtry=10, waittime=1):
"""wait for a process to actually die"""
import signal
from time import sleep
nbtry = 0
while nbtry < maxtry:
try:
kill(pid, signal.SIGUSR1)
except (OSError, AttributeError): # XXX win32
break
nbtry += 1
sleep(waittime)
else:
raise ExecutionError('can\'t kill process %s' % pid)
def list_instances(regdir):
if isdir(regdir):
return sorted(idir for idir in listdir(regdir) if isdir(join(regdir, idir)))
else:
return []
def detect_available_modes(templdir):
modes = []
for fname in ('schema', 'schema.py'):
if exists(join(templdir, fname)):
modes.append('repository')
break
for fname in ('data', 'views', 'views.py'):
if exists(join(templdir, fname)):
modes.append('web ui')
break
return modes
def available_cube_names(cwcfg):
"""Return a list of available cube names, with 'cubicweb_' prefix dropped.
"""
def drop_prefix(cube):
prefix = 'cubicweb_'
if cube.startswith(prefix):
cube = cube[len(prefix):]
return cube
return [drop_prefix(cube) for cube in cwcfg.available_cubes()]
class InstanceCommand(Command):
"""base class for command taking one instance id as arguments"""
arguments = '<instance>'
# enforce having one instance
min_args = 0
max_args = 1
options = (
("force",
{'short': 'f', 'action': 'store_true',
'default': False,
'help': 'force command without asking confirmation',
}
),
("pdb",
{'action': 'store_true', 'default': False,
'help': 'launch pdb on exception',
}
),
("loglevel",
{'type': 'choice', 'default': None, 'metavar': '<log level>',
'choices': LOG_LEVELS, 'short': 'l',
'help': 'allow to specify log level for debugging (choices: %s)'
% (', '.join(LOG_LEVELS)),
}
),
('dbglevel',
{'type': 'multiple_choice', 'metavar': '<debug level>',
'default': None,
'choices': DBG_FLAGS,
'help': ('Set the server debugging flags; you may choose several '
'values in %s; imply "debug" loglevel if loglevel is not set' % (DBG_FLAGS,)),
}),
)
actionverb = None
def run(self, args):
"""run the <command>_method on each argument (a list of instance
identifiers)
"""
if not args:
if "CW_INSTANCE" in os.environ:
appid = os.environ["CW_INSTANCE"]
else:
raise BadCommandUsage("Error: instance id is missing")
else:
appid = args[0]
cmdmeth = getattr(self, '%s_instance' % self.name)
traceback_ = None
# debugmode=True is to force to have a StreamHandler used instead of
# writting the logs into a file in /tmp
self.cwconfig = cwcfg.config_for(appid, debugmode=True)
# by default loglevel is 'error' but we keep the default value to None
# because some subcommands (e.g: pyramid) can override the loglevel in
# certain situations if it's not explicitly set by the user and we want
# to detect that (the "None" case)
if self['loglevel'] is None:
# if no loglevel is set but dbglevel is here we want to set level to debug
if self['dbglevel']:
init_cmdline_log_threshold(self.cwconfig, 'debug')
else:
init_cmdline_log_threshold(self.cwconfig, 'error')
else:
init_cmdline_log_threshold(self.cwconfig, self['loglevel'])
if self['dbglevel']:
set_debug('|'.join('DBG_' + x.upper() for x in self['dbglevel']))
try:
status = cmdmeth(appid) or 0
except (ExecutionError, ConfigurationError) as ex:
# we need to do extract this information here for pdb since it is
# now lost in python 3 once we exit the try/catch statement
exception_type, exception, traceback_ = sys.exc_info()
sys.stderr.write('instance %s not %s: %s\n' % (
appid, self.actionverb, ex))
status = 4
except Exception as ex:
# idem
exception_type, exception, traceback_ = sys.exc_info()
traceback.print_exc()
sys.stderr.write('instance %s not %s: %s\n' % (
appid, self.actionverb, ex))
status = 8
except (KeyboardInterrupt, SystemExit) as ex:
# idem
exception_type, exception, traceback_ = sys.exc_info()
sys.stderr.write('%s aborted\n' % self.name)
if isinstance(ex, KeyboardInterrupt):
status = 2 # specific error code
else:
status = ex.code
if status != 0 and self.config.pdb:
pdb = utils.get_pdb()
if traceback_ is not None:
pdb.post_mortem(traceback_)
else:
print("WARNING: Could not access to the traceback because the command return "
"code is different than 0 but the command didn't raised an exception.")
# we can't use "header=" of set_trace because ipdb doesn't supports it
pdb.set_trace()
sys.exit(status)
# base commands ###############################################################
class ListCommand(Command):
"""List configurations, cubes and instances.
List available configurations, installed cubes, and registered instances.
If given, the optional argument allows to restrict listing only a category of items.
"""
name = 'list'
arguments = '[all|cubes|configurations|instances]'
options = (
('verbose',
{'short': 'v', 'action': 'store_true',
'help': "display more information."}),
)
def run(self, args):
"""run the command with its specific arguments"""
if not args:
mode = 'all'
elif len(args) == 1:
mode = args[0]
else:
raise BadCommandUsage('Too many arguments')
from cubicweb.migration import ConfigurationProblem
if mode == 'all':
print('CubicWeb %s (%s mode)' % (cwcfg.cubicweb_version(), cwcfg.mode))
print()
if mode in ('all', 'config', 'configurations'):
cwcfg.load_available_configs()
print('Available configurations:')
for config in CONFIGURATIONS:
print('*', config.name)
for line in config.__doc__.splitlines():
line = line.strip()
if not line:
continue
print(' ', line)
print()
if mode in ('all', 'cubes'):
cfgpb = ConfigurationProblem(cwcfg)
try:
cube_names = available_cube_names(cwcfg)
namesize = max(len(x) for x in cube_names)
except ConfigurationError as ex:
print('No cubes available:', ex)
except ValueError:
print('No cubes available')
else:
print('Available cubes:')
for cube in cube_names:
try:
tinfo = cwcfg.cube_pkginfo(cube)
tversion = tinfo.version
cfgpb.add_cube(cube, tversion)
except (ConfigurationError, AttributeError) as ex:
tinfo = None
tversion = '[missing cube information: %s]' % ex
print('* %s %s' % (cube.ljust(namesize), tversion))
if self.config.verbose:
if tinfo:
descr = getattr(tinfo, 'description', '')
if not descr:
descr = tinfo.__doc__
if descr:
print(' ' + ' \n'.join(descr.splitlines()))
modes = detect_available_modes(cwcfg.cube_dir(cube))
print(' available modes: %s' % ', '.join(modes))
print()
if mode in ('all', 'instances'):
try:
regdir = cwcfg.instances_dir()
except ConfigurationError as ex:
print('No instance available:', ex)
print()
return
instances = list_instances(regdir)
if instances:
print('Available instances (%s):' % regdir)
for appid in instances:
modes = cwcfg.possible_configurations(appid)
if not modes:
print('* %s (BROKEN instance, no configuration found)' % appid)
continue
print('* %s (%s)' % (appid, ', '.join(modes)))
try:
config = cwcfg.config_for(appid, modes[0])
except Exception as exc:
print(' (BROKEN instance, %s)' % exc)
continue
else:
print('No instance available in %s' % regdir)
print()
if mode == 'all':
# configuration management problem solving
cfgpb.solve()
if cfgpb.warnings:
print('Warnings:\n', '\n'.join('* ' + txt for txt in cfgpb.warnings))
if cfgpb.errors:
print('Errors:')
for op, cube, version, src in cfgpb.errors:
if op == 'add':
print('* cube', cube, end=' ')
if version:
print(' version', version, end=' ')
print('is not installed, but required by %s' % src)
else:
print(
'* cube %s version %s is installed, but version %s is required by %s'
% (cube, cfgpb.cubes[cube], version, src)
)
def check_options_consistency(config):
if config.automatic and config.config_level > 0:
raise BadCommandUsage('--automatic and --config-level should not be '
'used together')
class CreateInstanceCommand(Command):
"""Create an instance from a cube. This is a unified
command which can handle web / server / all-in-one installation
according to available parts of the software library and of the
desired cube.
<cube>
the name of cube to use (list available cube names using
the "list" command). You can use several cubes by separating
them using comma (e.g. 'jpl,email')
<instance>
an identifier for the instance to create
"""
name = 'create'
arguments = '<cube> <instance>'
min_args = max_args = 2
options = (
('automatic',
{'short': 'a', 'action': 'store_true',
'default': False,
'help': 'automatic mode: never ask and use default answer to every '
'question. this may require that your login match a database super '
'user (allowed to create database & all).',
}),
('config-level',
{'short': 'l', 'type': 'int', 'metavar': '<level>',
'default': 0,
'help': 'configuration level (0..2): 0 will ask for essential '
'configuration parameters only while 2 will ask for all parameters',
}),
('config',
{'short': 'c', 'type': 'choice', 'metavar': '<install type>',
'choices': ('all-in-one', 'repository', 'pyramid'),
'default': 'all-in-one',
'help': 'installation type, telling which part of an instance '
'should be installed. You can list available configurations using the'
' "list" command. Default to "all-in-one", e.g. an installation '
'embedding both the RQL repository and the web server.',
}),
('no-db-create',
{'short': 'S',
'action': 'store_true',
'default': False,
'help': 'stop after creation and do not continue with db-create',
}),
)
def run(self, args):
"""run the command with its specific arguments"""
from logilab.common.textutils import splitstrip
check_options_consistency(self.config)
configname = self.config.config
cubes, appid = args
cubes = splitstrip(cubes)
# get the configuration and helper
config = cwcfg.config_for(appid, configname, creating=True)
cubes = config.expand_cubes(cubes)
config.init_cubes(cubes)
helper = self.config_helper(config)
# check the cube exists
try:
templdirs = [cwcfg.cube_dir(cube)
for cube in cubes]
except ConfigurationError as ex:
print(ex)
print('\navailable cubes:', end=' ')
print(', '.join(available_cube_names(cwcfg)))
return
# create the registry directory for this instance
print('\n' + underline_title('Creating the instance %s' % appid))
create_dir(config.apphome)
# cubicweb-ctl configuration
if not self.config.automatic:
print('\n' + underline_title('Configuring the instance (%s.conf)'
% configname))
config.input_config('main', self.config.config_level)
# configuration'specific stuff
print()
helper.bootstrap(cubes, self.config.automatic, self.config.config_level)
# input for cubes specific options
if not self.config.automatic:
sections = set(sect.lower() for sect, opt, odict in config.all_options()
if 'type' in odict
and odict.get('level', 0) <= self.config.config_level)
for section in sections:
if section not in ('main', 'email', 'web'):
print('\n' + underline_title('%s options' % section))
config.input_config(section, self.config.config_level)
# write down configuration
config.save()
print('-> generated config %s' % config.main_config_file())
# handle i18n files structure
# in the first cube given
from cubicweb import i18n
langs = [lang for lang, _ in i18n.available_catalogs(join(templdirs[0], 'i18n'))]
errors = config.i18ncompile(langs)
if errors:
print('\n'.join(errors))
if self.config.automatic \
or not ASK.confirm('error while compiling message catalogs, '
'continue anyway ?'):
print('creation not completed')
return
# create the additional data directory for this instance
if config.appdatahome != config.apphome: # true in dev mode
create_dir(config.appdatahome)
create_dir(join(config.appdatahome, 'backup'))
if config['uid']:
from logilab.common.shellutils import chown
# this directory should be owned by the uid of the server process
print('set %s as owner of the data directory' % config['uid'])
chown(config.appdatahome, config['uid'])
print('\n-> creation done for %s\n' % repr(config.apphome)[1:-1])
if not self.config.no_db_create:
helper.postcreate(self.config.automatic, self.config.config_level)
class DeleteInstanceCommand(Command):
"""Delete an instance. Will remove instance's files and
unregister it.
"""
name = 'delete'
arguments = '<instance>'
min_args = max_args = 1
def run(self, args):
"""run the command with its specific arguments"""
appid = args[0]
configs = [cwcfg.config_for(appid, configname)
for configname in cwcfg.possible_configurations(appid)]
if not configs:
raise ExecutionError('unable to guess configuration for %s' % appid)
for config in configs:
helper = self.config_helper(config, required=False)
if helper:
helper.cleanup()
# remove home
rm(config.apphome)
# remove instance data directory
try:
rm(config.appdatahome)
except OSError as ex:
import errno
if ex.errno != errno.ENOENT:
raise
confignames = ', '.join([config.name for config in configs])
print('-> instance %s (%s) deleted.' % (appid, confignames))
# instance commands ########################################################
def init_cmdline_log_threshold(config, loglevel):
if loglevel is not None:
config.global_set_option('log-threshold', loglevel.upper())
config.init_log(config['log-threshold'], force=True)
class UpgradeInstanceCommand(InstanceCommand):
"""Upgrade an instance after cubicweb and/or component(s) upgrade.
For repository update, you will be prompted for a login / password to use
to connect to the system database. For some upgrades, the given user
should have create or alter table permissions.
<instance>
identifier of the instance to upgrade.
"""
name = 'upgrade'
actionverb = 'upgraded'
options = InstanceCommand.options + (
('force-cube-version',
{'short': 't', 'type': 'named', 'metavar': 'cube1:X.Y.Z,cube2:X.Y.Z',
'default': None,
'help': 'force migration from the indicated version for the specified cube(s).'}),
('force-cubicweb-version',
{'short': 'e', 'type': 'string', 'metavar': 'X.Y.Z',
'default': None,
'help': 'force migration from the indicated cubicweb version.'}),
('fs-only',
{'short': 's', 'action': 'store_true',
'default': False,
'help': 'only upgrade files on the file system, not the database.'}),
('no-config-update',
{'short': 'C', 'action': 'store_true',
'default': False,
'help': 'do NOT update config file if set.'}),
('verbosity',
{'short': 'v', 'type': 'int', 'metavar': '<0..2>',
'default': 1,
'help': "0: no confirmation, 1: only main commands confirmed, 2 ask \
for everything."}),
('backup-db',
{'short': 'b', 'type': 'yn', 'metavar': '<y or n>',
'default': None,
'help': "Backup the instance database before upgrade.\n"
"If the option is ommitted, confirmation will be ask.",
}),
('ext-sources',
{'short': 'E', 'type': 'csv', 'metavar': '<sources>',
'default': None,
'help': "For multisources instances, specify to which sources the \
repository should connect to for upgrading. When unspecified or 'migration' is \
given, appropriate sources for migration will be automatically selected \
(recommended). If 'all' is given, will connect to all defined sources.",
}),
)
def upgrade_instance(self, appid):
print('\n' + underline_title('Upgrading the instance %s' % appid))
from logilab.common.changelog import Version
config = cwcfg.config_for(appid)
config.repairing = True # notice we're not starting the server
config.verbosity = self.config.verbosity
set_sources_mode = getattr(config, 'set_sources_mode', None)
if set_sources_mode is not None:
set_sources_mode(self.config.ext_sources or ('migration',))
# get instance and installed versions for the server and the componants
mih = config.migration_handler()
repo = mih.repo
vcconf = repo.get_versions()
helper = self.config_helper(config, required=False)
if self.config.force_cube_version:
for cube, version in self.config.force_cube_version.items():
vcconf[cube] = Version(version)
toupgrade = []
for cube in config.cubes():
installedversion = config.cube_version(cube)
try:
applversion = vcconf[cube]
except KeyError:
config.error('no version information for %s' % cube)
continue
if installedversion > applversion:
toupgrade.append((cube, applversion, installedversion))
cubicwebversion = config.cubicweb_version()
if self.config.force_cubicweb_version:
applcubicwebversion = Version(self.config.force_cubicweb_version)
vcconf['cubicweb'] = applcubicwebversion
else:
applcubicwebversion = vcconf.get('cubicweb')
if cubicwebversion > applcubicwebversion:
toupgrade.append(('cubicweb', applcubicwebversion, cubicwebversion))
# run cubicweb/componants migration scripts
if self.config.fs_only or toupgrade:
for cube, fromversion, toversion in toupgrade:
print('-> migration needed from %s to %s for %s' % (fromversion, toversion, cube))
with mih.cnx:
with mih.cnx.security_enabled(False, False):
mih.migrate(vcconf, reversed(toupgrade), self.config)
clear_cache(config, 'instance_md5_version')
else:
print('-> no data migration needed for instance %s.' % appid)
# rewrite main configuration file
if not self.config.no_config_update:
mih.rewrite_configuration()
mih.shutdown()
# handle i18n upgrade
if not self.i18nupgrade(config):
return
print()
if helper:
helper.postupgrade(repo)
print('-> instance migrated.')
print()
def i18nupgrade(self, config):
# handle i18n upgrade:
# * install new languages
# * recompile catalogs
# XXX search available language in the first cube given
from cubicweb import i18n
templdir = cwcfg.cube_dir(config.cubes()[0])
langs = [lang for lang, _ in i18n.available_catalogs(join(templdir, 'i18n'))]
errors = config.i18ncompile(langs)
if errors:
print('\n'.join(errors))
if not ASK.confirm('Error while compiling message catalogs, '
'continue anyway?'):
print('-> migration not completed.')
return False
return True
class ListVersionsInstanceCommand(InstanceCommand):
"""List versions used by an instance.
<instance>...
identifiers of the instances to list versions for.
"""
name = 'versions'
def versions_instance(self, appid):
config = self.cwconfig
# should not raise error if db versions don't match fs versions
config.repairing = True
# no need to load all appobjects and schema
config.quick_start = True
if hasattr(config, 'set_sources_mode'):
config.set_sources_mode(('migration',))
vcconf = config.repository().get_versions()
for key in sorted(vcconf):
print(key + ': %s.%s.%s' % vcconf[key])
class ShellCommand(Command):
"""Run an interactive migration shell on an instance. This is a python shell
with enhanced migration commands predefined in the namespace. An additional
argument may be given corresponding to a file containing commands to execute
in batch mode.
By default it will connect to a local instance using an in memory
connection, unless a URL to a running instance is specified.
Arguments after bare "--" string will not be processed by the shell command
You can use it to pass extra arguments to your script and expect for
them in '__args__' afterwards.
<instance>
the identifier of the instance to connect.
"""
name = 'shell'
arguments = '<instance> [batch command file(s)] [-- <script arguments>]'
min_args = 1
max_args = None
options = merge_options((
('system-only',
{'short': 'S', 'action': 'store_true',
'help': 'only connect to the system source when the instance is '
'using multiple sources. You can\'t use this option and the '
'--ext-sources option at the same time.',
'group': 'local'
}),
('ext-sources',
{'short': 'E', 'type': 'csv', 'metavar': '<sources>',
'help': "For multisources instances, specify to which sources the \
repository should connect to for upgrading. When unspecified or 'all' given, \
will connect to all defined sources. If 'migration' is given, appropriate \
sources for migration will be automatically selected.",
'group': 'local'
}),
('force',
{'short': 'f', 'action': 'store_true',
'help': 'don\'t check instance is up to date.',
'group': 'local'
}),
) + InstanceCommand.options)
def _get_mih(self, appid):
""" returns migration context handler & shutdown function """
config = cwcfg.config_for(appid)
if self.config.ext_sources:
assert not self.config.system_only
sources = self.config.ext_sources
elif self.config.system_only:
sources = ('system',)
else:
sources = ('all',)
config.set_sources_mode(sources)
config.repairing = self.config.force
mih = config.migration_handler()
return mih, lambda: mih.shutdown()
def run(self, args):
appuri = args.pop(0)
mih, shutdown_callback = self._get_mih(appuri)
try:
with mih.cnx:
with mih.cnx.security_enabled(False, False):
if args:
# use cmdline parser to access left/right attributes only
# remember that usage requires instance appid as first argument
scripts, args = self.cmdline_parser.largs[1:], self.cmdline_parser.rargs
for script in scripts:
mih.cmd_process_script(script, scriptargs=args)
mih.commit()
else:
mih.interactive_shell()
finally:
shutdown_callback()
class RecompileInstanceCatalogsCommand(InstanceCommand):
"""Recompile i18n catalogs for instances.
<instance>
identifier of the instance to consider.
"""
name = 'i18ninstance'
def i18ninstance_instance(self, appid):
"""recompile instance's messages catalogs"""
config = self.cwconfig
config.quick_start = True # notify this is not a regular start
repo = config.repository()
if config._cubes is None:
# web only config
config.init_cubes(repo.get_cubes())
errors = config.i18ncompile()
if errors:
print('\n'.join(errors))
class ListInstancesCommand(Command):
"""list available instances, useful for bash completion."""
name = 'listinstances'
hidden = True
def run(self, args):
"""run the command with its specific arguments"""
regdir = cwcfg.instances_dir()
for appid in sorted(listdir(regdir)):
print(appid)
class ListCubesCommand(Command):
"""list available componants, useful for bash completion."""
name = 'listcubes'
hidden = True
def run(self, args):
"""run the command with its specific arguments"""
for cube in cwcfg.available_cubes():
print(cube)
class ConfigureInstanceCommand(InstanceCommand):
"""Configure instance.
<instance>
identifier of the instance to configure.
"""
name = 'configure'
actionverb = 'configured'
options = merge_options(
InstanceCommand.options + (
('param',
{'short': 'p', 'type': 'named', 'metavar': 'key1:value1,key2:value2',
'default': None,
'help': 'set <key> to <value> in configuration file.'}),
),
)
def configure_instance(self, appid):
if self.config.param is not None:
appcfg = self.cwconfig
for key, value in self.config.param.items():
try:
appcfg.global_set_option(key, value)
except KeyError:
raise ConfigurationError(
'unknown configuration key "%s" for mode %s' % (key, appcfg.name))
appcfg.save()
for cmdcls in (ListCommand,
CreateInstanceCommand, DeleteInstanceCommand,
UpgradeInstanceCommand,
ListVersionsInstanceCommand,
ShellCommand,
RecompileInstanceCatalogsCommand,
ListInstancesCommand, ListCubesCommand,
ConfigureInstanceCommand,
):
CWCTL.register(cmdcls)
def run(args=sys.argv[1:]):
"""command line tool"""
filterwarnings('default', category=DeprecationWarning)
cwcfg.load_cwctl_plugins()
try:
CWCTL.run(args)
except ConfigurationError as err:
print('ERROR: ', err)
sys.exit(1)
except ExecutionError as err:
print(err)
sys.exit(2)
if __name__ == '__main__':
run()