462 lines
17 KiB
Python
462 lines
17 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# 2010-2015 Nico Schottelius (nico-cdist at schottelius.org)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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import logging
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import os
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import shutil
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import sys
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import time
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import pprint
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import itertools
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import tempfile
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import socket
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import cdist
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import cdist.exec.local
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import cdist.exec.remote
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from cdist import core
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def inspect_ssh_mux_opts():
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"""Inspect whether or not ssh supports multiplexing options.
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Return string containing multiplexing options if supported.
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If ControlPath is supported then placeholder for that path is
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specified and can be used for final string formatting.
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For example, this function can return string:
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"-o ControlMaster=auto -o ControlPersist=125 -o ControlPath={}".
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Then it can be formatted:
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mux_opts_string.format('/tmp/tmpxxxxxx/ssh-control-path').
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"""
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import subprocess
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wanted_mux_opts = {
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"ControlPath": "{}",
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"ControlMaster": "auto",
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"ControlPersist": "125",
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}
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mux_opts = " ".join([" -o {}={}".format(
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x, wanted_mux_opts[x]) for x in wanted_mux_opts])
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try:
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subprocess.check_output("ssh {}".format(mux_opts),
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stderr=subprocess.STDOUT, shell=True)
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except subprocess.CalledProcessError as e:
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subproc_output = e.output.decode().lower()
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if "bad configuration option" in subproc_output:
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return ""
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return mux_opts
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class Config(object):
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"""Cdist main class to hold arbitrary data"""
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def __init__(self, local, remote, dry_run=False, jobs=None):
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self.local = local
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self.remote = remote
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self.log = logging.getLogger(self.local.target_host[0])
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self.dry_run = dry_run
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self.jobs = jobs
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self.explorer = core.Explorer(self.local.target_host, self.local,
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self.remote, jobs=self.jobs)
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self.manifest = core.Manifest(self.local.target_host, self.local)
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self.code = core.Code(self.local.target_host, self.local, self.remote)
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def _init_files_dirs(self):
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"""Prepare files and directories for the run"""
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self.local.create_files_dirs()
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self.remote.create_files_dirs()
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@staticmethod
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def hostfile_process_line(line):
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"""Return host from read line or None if no host present."""
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if not line:
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return None
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# remove comment if present
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comment_index = line.find('#')
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if comment_index >= 0:
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host = line[:comment_index]
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else:
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host = line
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# remove leading and trailing whitespaces
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host = host.strip()
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# skip empty lines
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if host:
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return host
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else:
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return None
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@staticmethod
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def hosts(source):
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"""Yield hosts from source.
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Source can be a sequence or filename (stdin if \'-\').
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In case of filename each line represents one host.
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"""
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if isinstance(source, str):
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import fileinput
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try:
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for host in fileinput.input(files=(source)):
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host = Config.hostfile_process_line(host)
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if host:
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yield host
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except (IOError, OSError, UnicodeError) as e:
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raise cdist.Error(
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"Error reading hosts from file \'{}\': {}".format(
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source, e))
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else:
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if source:
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for host in source:
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yield host
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@classmethod
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def commandline(cls, args):
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"""Configure remote system"""
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import multiprocessing
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# FIXME: Refactor relict - remove later
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log = logging.getLogger("cdist")
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if args.manifest == '-' and args.hostfile == '-':
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raise cdist.Error(("Cannot read both, manifest and host file, "
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"from stdin"))
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# if no host source is specified then read hosts from stdin
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if not (args.hostfile or args.host):
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args.hostfile = '-'
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initial_manifest_tempfile = None
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if args.manifest == '-':
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# read initial manifest from stdin
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try:
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handle, initial_manifest_temp_path = tempfile.mkstemp(
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prefix='cdist.stdin.')
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with os.fdopen(handle, 'w') as fd:
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fd.write(sys.stdin.read())
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except (IOError, OSError) as e:
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raise cdist.Error(("Creating tempfile for stdin data "
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"failed: %s" % e))
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args.manifest = initial_manifest_temp_path
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import atexit
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atexit.register(lambda: os.remove(initial_manifest_temp_path))
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process = {}
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failed_hosts = []
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time_start = time.time()
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# default remote cmd patterns
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args.remote_exec_pattern = None
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args.remote_copy_pattern = None
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args_dict = vars(args)
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# if remote-exec and/or remote-copy args are None then user
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# didn't specify command line options nor env vars:
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# inspect multiplexing options for default cdist.REMOTE_COPY/EXEC
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if (args_dict['remote_copy'] is None or
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args_dict['remote_exec'] is None):
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mux_opts = inspect_ssh_mux_opts()
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if args_dict['remote_exec'] is None:
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args.remote_exec_pattern = cdist.REMOTE_EXEC + mux_opts
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if args_dict['remote_copy'] is None:
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args.remote_copy_pattern = cdist.REMOTE_COPY + mux_opts
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if args.out_path:
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base_root_path = args.out_path
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else:
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base_root_path = tempfile.mkdtemp()
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hostcnt = 0
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for host in itertools.chain(cls.hosts(args.host),
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cls.hosts(args.hostfile)):
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hostdir = cdist.str_hash(host)
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host_base_path = os.path.join(base_root_path, hostdir)
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log.debug("Base root path for target host \"{}\" is \"{}\"".format(
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host, host_base_path))
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hostcnt += 1
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if args.parallel:
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log.debug("Creating child process for %s", host)
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process[host] = multiprocessing.Process(
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target=cls.onehost,
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args=(host, host_base_path, hostdir, args, True))
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process[host].start()
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else:
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try:
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cls.onehost(host, host_base_path, hostdir,
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args, parallel=False)
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except cdist.Error as e:
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failed_hosts.append(host)
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# Catch errors in parallel mode when joining
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if args.parallel:
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for host in process.keys():
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log.debug("Joining process %s", host)
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process[host].join()
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if not process[host].exitcode == 0:
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failed_hosts.append(host)
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time_end = time.time()
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log.info("Total processing time for %s host(s): %s", hostcnt,
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(time_end - time_start))
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if len(failed_hosts) > 0:
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raise cdist.Error("Failed to configure the following hosts: " +
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" ".join(failed_hosts))
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@classmethod
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def onehost(cls, host, host_base_path, host_dir_name, args, parallel):
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"""Configure ONE system"""
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log = logging.getLogger(host)
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try:
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control_path = os.path.join(host_base_path, "ssh-control-path")
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# If we constructed patterns for remote commands then there is
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# placeholder for ssh ControlPath, format it and we have unique
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# ControlPath for each host.
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#
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# If not then use args.remote_exec/copy that user specified.
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if args.remote_exec_pattern:
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remote_exec = args.remote_exec_pattern.format(control_path)
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else:
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remote_exec = args.remote_exec
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if args.remote_copy_pattern:
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remote_copy = args.remote_copy_pattern.format(control_path)
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else:
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remote_copy = args.remote_copy
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log.debug("remote_exec for host \"{}\": {}".format(
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host, remote_exec))
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log.debug("remote_copy for host \"{}\": {}".format(
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host, remote_copy))
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try:
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# getaddrinfo returns a list of 5-tuples:
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# (family, type, proto, canonname, sockaddr)
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# where sockaddr is:
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# (address, port) for AF_INET,
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# (address, port, flow_info, scopeid) for AF_INET6
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ip_addr = socket.getaddrinfo(
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host, None, type=socket.SOCK_STREAM)[0][4][0]
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# gethostbyaddr returns triple
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# (hostname, aliaslist, ipaddrlist)
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host_name = socket.gethostbyaddr(ip_addr)[0]
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log.debug("derived host_name for host \"{}\": {}".format(
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host, host_name))
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except (socket.gaierror, socket.herror) as e:
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log.warn("Could not derive host_name for {}"
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", $host_name will be empty. Error is: {}".format(
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host, e))
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# in case of error provide empty value
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host_name = ''
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try:
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host_fqdn = socket.getfqdn(host)
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log.debug("derived host_fqdn for host \"{}\": {}".format(
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host, host_fqdn))
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except socket.herror as e:
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log.warn("Could not derive host_fqdn for {}"
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", $host_fqdn will be empty. Error is: {}".format(
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host, e))
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# in case of error provide empty value
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host_fqdn = ''
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target_host = (host, host_name, host_fqdn)
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log.debug("target_host: {}".format(target_host))
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local = cdist.exec.local.Local(
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target_host=target_host,
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base_root_path=host_base_path,
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host_dir_name=host_dir_name,
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initial_manifest=args.manifest,
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add_conf_dirs=args.conf_dir)
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remote = cdist.exec.remote.Remote(
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target_host=target_host,
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remote_exec=remote_exec,
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remote_copy=remote_copy)
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c = cls(local, remote, dry_run=args.dry_run, jobs=args.jobs)
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c.run()
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except cdist.Error as e:
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log.error(e)
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if parallel:
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# We are running in our own process here, need to sys.exit!
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sys.exit(1)
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else:
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raise
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except KeyboardInterrupt:
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# Ignore in parallel mode, we are existing anyway
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if parallel:
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sys.exit(0)
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# Pass back to controlling code in sequential mode
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else:
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raise
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def run(self):
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"""Do what is most often done: deploy & cleanup"""
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start_time = time.time()
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self._init_files_dirs()
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self.explorer.run_global_explorers(self.local.global_explorer_out_path)
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self.manifest.run_initial_manifest(self.local.initial_manifest)
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self.iterate_until_finished()
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self.local.save_cache()
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self.log.info("Finished successful run in %s seconds",
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time.time() - start_time)
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def object_list(self):
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"""Short name for object list retrieval"""
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for cdist_object in core.CdistObject.list_objects(
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self.local.object_path, self.local.type_path,
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self.local.object_marker_name):
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if cdist_object.cdist_type.is_install:
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self.log.debug(("Running in config mode, ignoring install "
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"object: {0}").format(cdist_object))
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else:
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yield cdist_object
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def iterate_once(self):
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"""
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Iterate over the objects once - helper method for
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iterate_until_finished
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"""
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objects_changed = False
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for cdist_object in self.object_list():
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if cdist_object.requirements_unfinished(cdist_object.requirements):
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"""We cannot do anything for this poor object"""
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continue
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if cdist_object.state == core.CdistObject.STATE_UNDEF:
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"""Prepare the virgin object"""
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self.object_prepare(cdist_object)
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objects_changed = True
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if cdist_object.requirements_unfinished(cdist_object.autorequire):
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"""The previous step created objects we depend on -
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wait for them
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"""
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continue
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if cdist_object.state == core.CdistObject.STATE_PREPARED:
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self.object_run(cdist_object)
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objects_changed = True
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return objects_changed
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def iterate_until_finished(self):
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"""
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Go through all objects and solve them
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one after another
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"""
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objects_changed = True
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while objects_changed:
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objects_changed = self.iterate_once()
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# Check whether all objects have been finished
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unfinished_objects = []
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for cdist_object in self.object_list():
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if not cdist_object.state == cdist_object.STATE_DONE:
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unfinished_objects.append(cdist_object)
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if unfinished_objects:
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info_string = []
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for cdist_object in unfinished_objects:
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requirement_names = []
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autorequire_names = []
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for requirement in cdist_object.requirements_unfinished(
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cdist_object.requirements):
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requirement_names.append(requirement.name)
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for requirement in cdist_object.requirements_unfinished(
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cdist_object.autorequire):
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autorequire_names.append(requirement.name)
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requirements = "\n ".join(requirement_names)
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autorequire = "\n ".join(autorequire_names)
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info_string.append(("%s requires:\n"
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" %s\n"
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"%s ""autorequires:\n"
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" %s" % (
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cdist_object.name,
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requirements, cdist_object.name,
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autorequire)))
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raise cdist.UnresolvableRequirementsError(
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("The requirements of the following objects could not be "
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"resolved:\n%s") % ("\n".join(info_string)))
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def object_prepare(self, cdist_object):
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"""Prepare object: Run type explorer + manifest"""
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self.log.info(
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"Running manifest and explorers for " + cdist_object.name)
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self.explorer.run_type_explorers(cdist_object)
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self.manifest.run_type_manifest(cdist_object)
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cdist_object.state = core.CdistObject.STATE_PREPARED
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def object_run(self, cdist_object):
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"""Run gencode and code for an object"""
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self.log.debug("Trying to run object %s" % (cdist_object.name))
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if cdist_object.state == core.CdistObject.STATE_DONE:
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raise cdist.Error(("Attempting to run an already finished "
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"object: %s"), cdist_object)
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cdist_type = cdist_object.cdist_type
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# Generate
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self.log.info("Generating code for %s" % (cdist_object.name))
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cdist_object.code_local = self.code.run_gencode_local(cdist_object)
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cdist_object.code_remote = self.code.run_gencode_remote(cdist_object)
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if cdist_object.code_local or cdist_object.code_remote:
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cdist_object.changed = True
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# Execute
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if not self.dry_run:
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if cdist_object.code_local or cdist_object.code_remote:
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self.log.info("Executing code for %s" % (cdist_object.name))
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if cdist_object.code_local:
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self.code.run_code_local(cdist_object)
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if cdist_object.code_remote:
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self.code.transfer_code_remote(cdist_object)
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self.code.run_code_remote(cdist_object)
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else:
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self.log.info("Skipping code execution due to DRY RUN")
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# Mark this object as done
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self.log.debug("Finishing run of " + cdist_object.name)
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cdist_object.state = core.CdistObject.STATE_DONE
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