forked from ungleich-public/cdist
326 lines
12 KiB
Python
326 lines
12 KiB
Python
# -*- coding: utf-8 -*-
|
|
#
|
|
# 2011-2017 Steven Armstrong (steven-cdist at armstrong.cc)
|
|
# 2011-2013 Nico Schottelius (nico-cdist at schottelius.org)
|
|
#
|
|
# 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/>.
|
|
#
|
|
#
|
|
|
|
import os
|
|
import glob
|
|
import subprocess
|
|
import logging
|
|
import multiprocessing
|
|
|
|
import cdist
|
|
import cdist.exec.util as util
|
|
import cdist.util.ipaddr as ipaddr
|
|
from cdist.mputil import mp_pool_run
|
|
|
|
|
|
def _wrap_addr(addr):
|
|
"""If addr is IPv6 then return addr wrapped between '[' and ']',
|
|
otherwise return it intact."""
|
|
if ipaddr.is_ipv6(addr):
|
|
return "".join(("[", addr, "]", ))
|
|
else:
|
|
return addr
|
|
|
|
|
|
class DecodeError(cdist.Error):
|
|
def __init__(self, command):
|
|
self.command = command
|
|
|
|
def __str__(self):
|
|
return "Cannot decode output of " + " ".join(self.command)
|
|
|
|
|
|
class Remote:
|
|
"""Execute commands remotely.
|
|
|
|
All interaction with the remote side should be done through this class.
|
|
Directly accessing the remote side from python code is a bug.
|
|
|
|
"""
|
|
def __init__(self,
|
|
target_host,
|
|
remote_exec,
|
|
remote_copy,
|
|
base_path=None,
|
|
quiet_mode=None,
|
|
archiving_mode=None,
|
|
configuration=None,
|
|
stdout_base_path=None,
|
|
stderr_base_path=None,
|
|
save_output_streams=True):
|
|
self.target_host = target_host
|
|
self._exec = remote_exec
|
|
self._copy = remote_copy
|
|
|
|
if base_path:
|
|
self.base_path = base_path
|
|
else:
|
|
self.base_path = "/var/lib/cdist"
|
|
self.quiet_mode = quiet_mode
|
|
self.archiving_mode = archiving_mode
|
|
if configuration:
|
|
self.configuration = configuration
|
|
else:
|
|
self.configuration = {}
|
|
self.save_output_streams = save_output_streams
|
|
|
|
self.stdout_base_path = stdout_base_path
|
|
self.stderr_base_path = stderr_base_path
|
|
|
|
self.conf_path = os.path.join(self.base_path, "conf")
|
|
self.object_path = os.path.join(self.base_path, "object")
|
|
|
|
self.type_path = os.path.join(self.conf_path, "type")
|
|
self.global_explorer_path = os.path.join(self.conf_path, "explorer")
|
|
|
|
self._open_logger()
|
|
|
|
self._init_env()
|
|
|
|
def _open_logger(self):
|
|
self.log = logging.getLogger(self.target_host[0])
|
|
|
|
# logger is not pickable, so remove it when we pickle
|
|
def __getstate__(self):
|
|
state = self.__dict__.copy()
|
|
if 'log' in state:
|
|
del state['log']
|
|
return state
|
|
|
|
# recreate logger when we unpickle
|
|
def __setstate__(self, state):
|
|
self.__dict__.update(state)
|
|
self._open_logger()
|
|
|
|
def _init_env(self):
|
|
"""Setup environment for scripts."""
|
|
# FIXME: better do so in exec functions that require it!
|
|
os.environ['__remote_copy'] = self._copy
|
|
os.environ['__remote_exec'] = self._exec
|
|
|
|
def create_files_dirs(self):
|
|
self.rmdir(self.base_path)
|
|
self.mkdir(self.base_path)
|
|
self.run(["chmod", "0700", self.base_path])
|
|
self.mkdir(self.conf_path)
|
|
|
|
def remove_files_dirs(self):
|
|
self.rmdir(self.base_path)
|
|
|
|
def rmfile(self, path):
|
|
"""Remove file on the remote side."""
|
|
self.log.trace("Remote rm: %s", path)
|
|
self.run(["rm", "-f", path])
|
|
|
|
def rmdir(self, path):
|
|
"""Remove directory on the remote side."""
|
|
self.log.trace("Remote rmdir: %s", path)
|
|
self.run(["rm", "-rf", path])
|
|
|
|
def mkdir(self, path):
|
|
"""Create directory on the remote side."""
|
|
self.log.trace("Remote mkdir: %s", path)
|
|
self.run(["mkdir", "-p", path])
|
|
|
|
def extract_archive(self, path, mode):
|
|
"""Extract archive path on the remote side."""
|
|
import cdist.autil as autil
|
|
|
|
self.log.trace("Remote extract archive: %s", path)
|
|
command = ["tar", "-x", "-m", "-C", ]
|
|
directory = os.path.dirname(path)
|
|
command.append(directory)
|
|
xopt = autil.get_extract_option(mode)
|
|
if xopt:
|
|
command.append(xopt)
|
|
command.append("-f")
|
|
command.append(path)
|
|
self.run(command)
|
|
|
|
def _transfer_file(self, source, destination):
|
|
command = self._copy.split()
|
|
command.extend([source, '{0}:{1}'.format(
|
|
_wrap_addr(self.target_host[0]), destination)])
|
|
self._run_command(command)
|
|
|
|
def transfer(self, source, destination, jobs=None):
|
|
"""Transfer a file or directory to the remote side."""
|
|
self.log.trace("Remote transfer: %s -> %s", source, destination)
|
|
# self.rmdir(destination)
|
|
if os.path.isdir(source):
|
|
self.mkdir(destination)
|
|
used_archiving = False
|
|
if self.archiving_mode:
|
|
self.log.trace("Remote transfer in archiving mode")
|
|
import cdist.autil as autil
|
|
|
|
# create archive
|
|
tarpath, fcnt = autil.tar(source, self.archiving_mode)
|
|
if tarpath is None:
|
|
self.log.trace(("Files count {} is lower than {} limit, "
|
|
"skipping archiving").format(
|
|
fcnt, autil.FILES_LIMIT))
|
|
else:
|
|
self.log.trace(("Archiving mode, tarpath: %s, file count: "
|
|
"%s"), tarpath, fcnt)
|
|
# get archive name
|
|
tarname = os.path.basename(tarpath)
|
|
self.log.trace("Archiving mode tarname: %s", tarname)
|
|
# archive path at the remote
|
|
desttarpath = os.path.join(destination, tarname)
|
|
self.log.trace(
|
|
"Archiving mode desttarpath: %s", desttarpath)
|
|
# transfer archive to the remote side
|
|
self.log.trace("Archiving mode: transferring")
|
|
self._transfer_file(tarpath, desttarpath)
|
|
# extract archive at the remote
|
|
self.log.trace("Archiving mode: extracting")
|
|
self.extract_archive(desttarpath, self.archiving_mode)
|
|
# remove remote archive
|
|
self.log.trace("Archiving mode: removing remote archive")
|
|
self.rmfile(desttarpath)
|
|
# remove local archive
|
|
self.log.trace("Archiving mode: removing local archive")
|
|
os.remove(tarpath)
|
|
used_archiving = True
|
|
if not used_archiving:
|
|
self._transfer_dir(source, destination)
|
|
elif jobs:
|
|
raise cdist.Error("Source {} is not a directory".format(source))
|
|
else:
|
|
self._transfer_file(source, destination)
|
|
|
|
def _transfer_dir(self, source, destination):
|
|
command = self._copy.split()
|
|
for f in glob.glob1(source, '*'):
|
|
path = os.path.join(source, f)
|
|
command.extend([path])
|
|
command.extend(['{0}:{1}'.format(
|
|
_wrap_addr(self.target_host[0]), destination)])
|
|
self._run_command(command)
|
|
|
|
def run_script(self, script, env=None, return_output=False, stdout=None,
|
|
stderr=None):
|
|
"""Run the given script with the given environment on the remote side.
|
|
Return the output as a string.
|
|
|
|
"""
|
|
|
|
command = [
|
|
self.configuration.get('remote_shell', "/bin/sh"),
|
|
"-e"
|
|
]
|
|
command.append(script)
|
|
|
|
return self.run(command, env=env, return_output=return_output,
|
|
stdout=stdout, stderr=stderr)
|
|
|
|
def run(self, command, env=None, return_output=False, stdout=None,
|
|
stderr=None):
|
|
"""Run the given command with the given environment on the remote side.
|
|
Return the output as a string.
|
|
|
|
"""
|
|
# prefix given command with remote_exec
|
|
cmd = self._exec.split()
|
|
cmd.append(self.target_host[0])
|
|
|
|
# can't pass environment to remote side, so prepend command with
|
|
# variable declarations
|
|
|
|
# cdist command prepended with variable assignments expects
|
|
# POSIX shell (bourne, bash) at the remote as user default shell.
|
|
# If remote user shell isn't POSIX shell, but for e.g. csh/tcsh
|
|
# then these var assignments are not var assignments for this
|
|
# remote shell, it tries to execute it as a command and fails.
|
|
# So really do this by default:
|
|
# /bin/sh -c 'export <var assignments>; command'
|
|
# so that constructed remote command isn't dependent on remote
|
|
# shell. Do this only if env is not None. env breaks this.
|
|
# Explicitly use /bin/sh, because var assignments assume POSIX
|
|
# shell already.
|
|
# This leaves the posibility to write script that needs to be run
|
|
# remotely in e.g. csh and setting up CDIST_REMOTE_SHELL to e.g.
|
|
# /bin/csh will execute this script in the right way.
|
|
if env:
|
|
remote_env = [" export %s=%s;" % item for item in env.items()]
|
|
string_cmd = ("/bin/sh -c '" + " ".join(remote_env) +
|
|
" ".join(command) + "'")
|
|
cmd.append(string_cmd)
|
|
else:
|
|
cmd.extend(command)
|
|
return self._run_command(cmd, env=env, return_output=return_output,
|
|
stdout=stdout, stderr=stderr)
|
|
|
|
def _run_command(self, command, env=None, return_output=False, stdout=None,
|
|
stderr=None):
|
|
"""Run the given command with the given environment.
|
|
Return the output as a string.
|
|
|
|
"""
|
|
assert isinstance(command, (list, tuple)), (
|
|
"list or tuple argument expected, got: %s" % command)
|
|
|
|
close_stdout = False
|
|
close_stderr = False
|
|
if self.save_output_streams:
|
|
if not return_output and stdout is None:
|
|
stdout = util.get_std_fd(self.stdout_base_path, 'remote')
|
|
close_stdout = True
|
|
if stderr is None:
|
|
stderr = util.get_std_fd(self.stderr_base_path, 'remote')
|
|
close_stderr = True
|
|
|
|
# export target_host, target_hostname, target_fqdn
|
|
# for use in __remote_{exec,copy} scripts
|
|
os_environ = os.environ.copy()
|
|
os_environ['__target_host'] = self.target_host[0]
|
|
os_environ['__target_hostname'] = self.target_host[1]
|
|
os_environ['__target_fqdn'] = self.target_host[2]
|
|
|
|
self.log.trace("Remote run: %s", command)
|
|
try:
|
|
if self.quiet_mode:
|
|
stderr = subprocess.DEVNULL
|
|
close_stderr = False
|
|
if return_output:
|
|
output = subprocess.check_output(command, env=os_environ,
|
|
stderr=stderr).decode()
|
|
else:
|
|
subprocess.check_call(command, env=os_environ, stdout=stdout,
|
|
stderr=stderr)
|
|
output = None
|
|
|
|
if self.save_output_streams:
|
|
util.log_std_fd(self.log, command, stderr, 'Remote stderr')
|
|
util.log_std_fd(self.log, command, stdout, 'Remote stdout')
|
|
|
|
return output
|
|
except (OSError, subprocess.CalledProcessError) as error:
|
|
raise cdist.Error(" ".join(command) + ": " + str(error.args[1]))
|
|
except UnicodeDecodeError:
|
|
raise DecodeError(command)
|
|
finally:
|
|
if close_stdout:
|
|
stdout.close()
|
|
if close_stderr:
|
|
stderr.close()
|