cdist/scripts/cdist

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# 2010-2013 Nico Schottelius (nico-cdist at schottelius.org)
# 2016 Darko Poljak (darko.poljak at gmail.com)
#
# This file is part of cdist.
#
# cdist 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 3 of the License, or
# (at your option) any later version.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
def inspect_ssh_mux_opts(control_path_dir="~/.ssh/"):
"""Inspect whether or not ssh supports multiplexing options"""
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import subprocess
import os
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control_path = os.path.join(control_path_dir,
"cdist.socket.master-%l-%r@%h:%p")
wanted_mux_opts = {
"ControlPath": control_path,
"ControlMaster": "auto",
"ControlPersist": "125",
}
mux_opts = " ".join([" -o {}={}".format(x,
wanted_mux_opts[x]) for x in wanted_mux_opts])
try:
subprocess.check_output("ssh {}".format(mux_opts),
stderr=subprocess.STDOUT, shell=True)
except subprocess.CalledProcessError as e:
subproc_output = e.output.decode().lower()
if "bad configuration option" in subproc_output:
return ""
return mux_opts
def commandline():
"""Parse command line"""
import argparse
import cdist.banner
import cdist.config
import cdist.shell
import tempfile
import shutil
import os
# Construct parser others can reuse
parser = {}
# Options _all_ parsers have in common
parser['loglevel'] = argparse.ArgumentParser(add_help=False)
parser['loglevel'].add_argument('-d', '--debug',
help='Set log level to debug', action='store_true',
default=False)
parser['loglevel'].add_argument('-v', '--verbose',
help='Set log level to info, be more verbose',
action='store_true', default=False)
# Main subcommand parser
parser['main'] = argparse.ArgumentParser(description='cdist '
+ cdist.VERSION,
parents=[parser['loglevel']])
parser['main'].add_argument('-V', '--version',
help='Show version', action='version',
version='%(prog)s ' + cdist.VERSION)
parser['sub'] = parser['main'].add_subparsers(title="Commands",
dest="command")
# Banner
parser['banner'] = parser['sub'].add_parser('banner',
parents=[parser['loglevel']])
parser['banner'].set_defaults(func=cdist.banner.banner)
# Config
parser['config'] = parser['sub'].add_parser('config',
parents=[parser['loglevel']])
parser['config'].add_argument('host', nargs='*',
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help='host(s) to operate on')
parser['config'].add_argument('-c', '--conf-dir',
help=('Add configuration directory (can be repeated, '
'last one wins)'), action='append')
parser['config'].add_argument('-f', '--file',
help=('Read additional hosts to operate on from specified file '
'or from stdin if \'-\' (each host on separate line). '
'If no host or host file is specified then, by default, '
'read hosts from stdin.'),
dest='hostfile', required=False)
parser['config'].add_argument('-i', '--initial-manifest',
help='Path to a cdist manifest or \'-\' to read from stdin.',
dest='manifest', required=False)
parser['config'].add_argument('-n', '--dry-run',
help='Do not execute code', action='store_true')
parser['config'].add_argument('-o', '--out-dir',
help='Directory to save cdist output in', dest="out_path")
parser['config'].add_argument('-p', '--parallel',
help='Operate on multiple hosts in parallel',
action='store_true', dest='parallel')
parser['config'].add_argument('-s', '--sequential',
help='Operate on multiple hosts sequentially (default)',
action='store_false', dest='parallel')
# remote-copy and remote-exec defaults are environment variables
# if set; if not then None - these will be futher handled after
# parsing to determine implementation default
parser['config'].add_argument('--remote-copy',
help='Command to use for remote copy (should behave like scp)',
action='store', dest='remote_copy',
default=os.environ.get('CDIST_REMOTE_COPY'))
parser['config'].add_argument('--remote-exec',
help=('Command to use for remote execution '
'(should behave like ssh)'),
action='store', dest='remote_exec',
default=os.environ.get('CDIST_REMOTE_EXEC'))
parser['config'].set_defaults(func=cdist.config.Config.commandline)
# Shell
parser['shell'] = parser['sub'].add_parser('shell',
parents=[parser['loglevel']])
parser['shell'].add_argument('-s', '--shell',
help='Select shell to use, defaults to current shell')
parser['shell'].set_defaults(func=cdist.shell.Shell.commandline)
for p in parser:
parser[p].epilog = "Get cdist at http://www.nico.schottelius.org/software/cdist/"
args = parser['main'].parse_args(sys.argv[1:])
# Loglevels are handled globally in here and debug wins over verbose
if args.verbose:
logging.root.setLevel(logging.INFO)
if args.debug:
logging.root.setLevel(logging.DEBUG)
args_dict = vars(args)
# if command with remote_copy and remote_exec params
if 'remote_copy' in args_dict and 'remote_exec' in args_dict:
# if remote-exec and/or remote-copy args are None then user
# didn't specify command line options nor env vars:
# inspect multiplexing options for default cdist.REMOTE_COPY/EXEC
if args_dict['remote_copy'] is None or args_dict['remote_exec'] is None:
control_path_dir = tempfile.mkdtemp()
import atexit
atexit.register(lambda: shutil.rmtree(control_path_dir))
mux_opts = inspect_ssh_mux_opts(control_path_dir)
if args_dict['remote_exec'] is None:
args.remote_exec = cdist.REMOTE_EXEC + mux_opts
if args_dict['remote_copy'] is None:
args.remote_copy = cdist.REMOTE_COPY + mux_opts
if args.command == 'config':
if args.manifest == '-' and args.hostfile == '-':
print('cdist config: error: cannot read both, manifest and host file, from stdin')
sys.exit(1)
log.debug(args)
log.info("version %s" % cdist.VERSION)
# Work around python 3.3 bug:
# http://bugs.python.org/issue16308
# http://bugs.python.org/issue9253
# FIXME: catching AttributeError also hides
# real problems.. try a different way
# FIXME: we always print main help, not
# the help of the actual parser being used!
try:
getattr(args, "func")
except AttributeError:
parser['main'].print_help()
sys.exit(0)
args.func(args)
if __name__ == "__main__":
# Sys is needed for sys.exit()
import sys
cdistpythonversion = '3.2'
if sys.version < cdistpythonversion:
print('Python >= ' + cdistpythonversion +
' is required on the source host.', file=sys.stderr)
sys.exit(1)
exit_code = 0
try:
import logging
import os
import re
import cdist
import cdist.log
logging.setLoggerClass(cdist.log.Log)
logging.basicConfig(format='%(levelname)s: %(message)s')
log = logging.getLogger("cdist")
if re.match("__", os.path.basename(sys.argv[0])):
import cdist.emulator
emulator = cdist.emulator.Emulator(sys.argv)
emulator.run()
else:
commandline()
except KeyboardInterrupt:
exit_code = 2
except cdist.Error as e:
log.error(e)
exit_code = 1
sys.exit(exit_code)