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#!/usr/bin/env python
"""This tool examines your Bcfg2 specifications for errors."""
import sys
import time
import inspect
import logging
import Bcfg2.Logger
import Bcfg2.Options
import Bcfg2.Server.Core
import Bcfg2.Server.Lint
LOGGER = logging.getLogger('bcfg2-lint')
def run_serverless_plugins(plugins, setup=None, errorhandler=None, files=None):
""" Run serverless plugins """
LOGGER.debug("Running serverless plugins")
for plugin_name, plugin in list(plugins.items()):
run_plugin(plugin, plugin_name, errorhandler=errorhandler,
setup=setup, files=files)
def run_server_plugins(plugins, setup=None, errorhandler=None, files=None):
""" run plugins that require a running server to run """
core = load_server(setup)
try:
LOGGER.debug("Running server plugins")
for plugin_name, plugin in list(plugins.items()):
run_plugin(plugin, plugin_name, args=[core],
errorhandler=errorhandler, setup=setup, files=files)
finally:
core.shutdown()
def run_plugin(plugin, plugin_name, setup=None, errorhandler=None,
args=None, files=None):
""" run a single plugin, server-ful or serverless. """
LOGGER.debug(" Running %s" % plugin_name)
if args is None:
args = []
if errorhandler is None:
errorhandler = get_errorhandler(setup)
if setup is not None and setup.cfp.has_section(plugin_name):
arg = setup
for key, val in setup.cfp.items(plugin_name):
arg[key] = val
args.append(arg)
else:
args.append(setup)
# python 2.5 doesn't support mixing *magic and keyword arguments
start = time.time()
rv = plugin(*args, **dict(files=files, errorhandler=errorhandler)).Run()
LOGGER.debug(" Ran %s in %0.2f seconds" % (plugin_name,
time.time() - start))
return rv
def get_errorhandler(setup):
""" get a Bcfg2.Server.Lint.ErrorHandler object """
if setup.cfp.has_section("errors"):
errors = dict(setup.cfp.items("errors"))
else:
errors = None
return Bcfg2.Server.Lint.ErrorHandler(errors=errors)
def load_server(setup):
""" load server """
core = Bcfg2.Server.Core.BaseCore(setup)
core.load_plugins()
core.block_for_fam_events(handle_events=True)
return core
def load_plugin(module, obj_name=None):
""" load a single plugin """
parts = module.split(".")
if obj_name is None:
obj_name = parts[-1]
mod = __import__(module)
for part in parts[1:]:
mod = getattr(mod, part)
return getattr(mod, obj_name)
def load_plugins(setup):
""" get list of plugins to run """
if setup['args']:
plugin_list = setup['args']
elif "bcfg2-repo-validate" in sys.argv[0]:
plugin_list = 'RequiredAttrs,Validate'.split(',')
elif setup['lint_plugins']:
plugin_list = setup['lint_plugins']
else:
plugin_list = Bcfg2.Server.Lint.plugins
allplugins = dict()
for plugin in plugin_list:
try:
allplugins[plugin] = load_plugin("Bcfg2.Server.Lint." + plugin)
except ImportError:
try:
allplugins[plugin] = \
load_plugin("Bcfg2.Server.Plugins." + plugin,
obj_name=plugin + "Lint")
except (ImportError, AttributeError):
err = sys.exc_info()[1]
LOGGER.error("Failed to load plugin %s: %s" %
(plugin + "Lint", err))
except AttributeError:
err = sys.exc_info()[1]
LOGGER.error("Failed to load plugin %s: %s" % (plugin, err))
for plugin in setup['plugins']:
if plugin in allplugins:
# already loaded
continue
try:
allplugins[plugin] = \
load_plugin("Bcfg2.Server.Plugins." + plugin,
obj_name=plugin + "Lint")
except AttributeError:
pass
except ImportError:
err = sys.exc_info()[1]
LOGGER.error("Failed to load plugin %s: %s" % (plugin + "Lint",
err))
serverplugins = dict()
serverlessplugins = dict()
for plugin_name, plugin in allplugins.items():
if [c for c in inspect.getmro(plugin)
if c == Bcfg2.Server.Lint.ServerPlugin]:
serverplugins[plugin_name] = plugin
else:
serverlessplugins[plugin_name] = plugin
return (serverlessplugins, serverplugins)
def main():
optinfo = dict(lint_config=Bcfg2.Options.LINT_CONFIG,
showerrors=Bcfg2.Options.LINT_SHOW_ERRORS,
stdin=Bcfg2.Options.LINT_FILES_ON_STDIN,
schema=Bcfg2.Options.SCHEMA_PATH,
lint_plugins=Bcfg2.Options.LINT_PLUGINS)
optinfo.update(Bcfg2.Options.CLI_COMMON_OPTIONS)
optinfo.update(Bcfg2.Options.SERVER_COMMON_OPTIONS)
setup = Bcfg2.Options.OptionParser(optinfo)
setup.parse(sys.argv[1:])
log_args = dict(to_syslog=setup['syslog'], to_console=logging.WARNING)
if setup['verbose']:
log_args['to_console'] = logging.DEBUG
Bcfg2.Logger.setup_logging('bcfg2-info', **log_args)
setup.cfp.read(setup['lint_config'])
setup.reparse()
if setup['stdin']:
files = [s.strip() for s in sys.stdin.readlines()]
else:
files = None
(serverlessplugins, serverplugins) = load_plugins(setup)
errorhandler = get_errorhandler(setup)
if setup['showerrors']:
for plugin in serverplugins.values() + serverlessplugins.values():
errorhandler.RegisterErrors(getattr(plugin, 'Errors')())
print("%-35s %-35s" % ("Error name", "Handler"))
for err, handler in errorhandler.errortypes.items():
print("%-35s %-35s" % (err, handler.__name__))
raise SystemExit(0)
run_serverless_plugins(serverlessplugins, errorhandler=errorhandler,
setup=setup, files=files)
if serverplugins:
if errorhandler.errors:
# it would be swell if we could try to start the server
# even if there were errors with the serverless plugins,
# but since XML parsing errors occur in the FAM thread
# (not in the core server thread), there's no way we can
# start the server and try to catch exceptions --
# bcfg2-lint isn't in the same stack as the exceptions.
# so we're forced to assume that a serverless plugin error
# will prevent the server from starting
print("Serverless plugins encountered errors, skipping server "
"plugins")
else:
run_server_plugins(serverplugins, errorhandler=errorhandler,
setup=setup, files=files)
if errorhandler.errors or errorhandler.warnings or setup['verbose']:
print("%d errors" % errorhandler.errors)
print("%d warnings" % errorhandler.warnings)
if errorhandler.errors:
raise SystemExit(2)
elif errorhandler.warnings:
raise SystemExit(3)
if __name__ == '__main__':
sys.exit(main())
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