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https://salsa.debian.org/freeipa-team/freeipa.git
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de981d348e
Make sure all messages displayed on screen to the user can be found in the log as well. The messages are also logged if the script is ran in quiet mode. https://fedorahosted.org/freeipa/ticket/6497 Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
657 lines
26 KiB
Python
Executable File
657 lines
26 KiB
Python
Executable File
#! /usr/bin/python2 -E
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# Authors: Martin Kosek <mkosek@redhat.com>
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#
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# Copyright (C) 2011 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program 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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# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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#
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from __future__ import print_function
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import ipaclient.install.ipachangeconf
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from ipapython.config import IPAOptionParser
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from ipapython.dn import DN
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from ipapython import version
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from ipapython import ipautil, certdb
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from ipalib import api, errors, x509
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from ipaserver.install import installutils
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# pylint: disable=deprecated-module
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from optparse import OptionGroup, OptionValueError
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# pylint: enable=deprecated-module
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from ipapython.ipa_log_manager import root_logger, standard_logging_setup
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import copy
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import sys
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import os
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import signal
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import tempfile
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import select
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import socket
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import time
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import threading
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import traceback
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from socket import SOCK_STREAM, SOCK_DGRAM
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import distutils.spawn
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from ipaplatform.paths import paths
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import gssapi
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from cryptography.hazmat.primitives import serialization
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CONNECT_TIMEOUT = 5
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RESPONDER = None
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QUIET = False
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CCACHE_FILE = None
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KRB5_CONFIG = None
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class SshExec(object):
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def __init__(self, user, addr):
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self.user = user
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self.addr = addr
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self.cmd = distutils.spawn.find_executable('ssh')
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def __call__(self, command, verbose=False):
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# Bail if ssh is not installed
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if self.cmd is None:
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root_logger.warning("WARNING: ssh not installed, skipping ssh test")
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return ('', '', 0)
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tmpf = tempfile.NamedTemporaryFile()
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cmd = [
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self.cmd,
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'-o StrictHostKeychecking=no',
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'-o UserKnownHostsFile=%s' % tmpf.name,
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'-o GSSAPIAuthentication=yes',
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'-o User=%s' % self.user,
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'%s' % self.addr,
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command
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]
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if verbose:
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cmd.insert(1, '-v')
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env = dict()
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if KRB5_CONFIG is not None:
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env['KRB5_CONFIG'] = KRB5_CONFIG
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elif 'KRB5_CONFIG' in os.environ:
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env['KRB5_CONFIG'] = os.environ['KRB5_CONFIG']
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if CCACHE_FILE is not None:
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env['KRB5CCNAME'] = CCACHE_FILE
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elif 'KRB5CCNAME' in os.environ:
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env['KRB5CCNAME'] = os.environ['KRB5CCNAME']
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return ipautil.run(cmd, env=env, raiseonerr=False,
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capture_output=True, capture_error=True)
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class CheckedPort(object):
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def __init__(self, port, port_type, description):
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self.port = port
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self.port_type = port_type
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self.description = description
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BASE_PORTS = [
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CheckedPort(389, SOCK_STREAM, "Directory Service: Unsecure port"),
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CheckedPort(636, SOCK_STREAM, "Directory Service: Secure port"),
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CheckedPort(88, SOCK_STREAM, "Kerberos KDC: TCP"),
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CheckedPort(88, SOCK_DGRAM, "Kerberos KDC: UDP"),
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CheckedPort(464, SOCK_STREAM, "Kerberos Kpasswd: TCP"),
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CheckedPort(464, SOCK_DGRAM, "Kerberos Kpasswd: UDP"),
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CheckedPort(80, SOCK_STREAM, "HTTP Server: Unsecure port"),
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CheckedPort(443, SOCK_STREAM, "HTTP Server: Secure port"),
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]
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def parse_options():
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def ca_cert_file_callback(option, opt, value, parser):
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if not os.path.exists(value):
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raise OptionValueError(
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"%s option '%s' does not exist" % (opt, value))
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if not os.path.isfile(value):
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raise OptionValueError(
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"%s option '%s' is not a file" % (opt, value))
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if not os.path.isabs(value):
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raise OptionValueError(
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"%s option '%s' is not an absolute file path" % (opt, value))
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try:
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x509.load_certificate_list_from_file(value)
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except Exception:
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raise OptionValueError(
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"%s option '%s' is not a valid certificate file" %
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(opt, value))
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parser.values.ca_cert_file = value
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parser = IPAOptionParser(version=version.VERSION)
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replica_group = OptionGroup(parser, "on-replica options")
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replica_group.add_option("-m", "--master", dest="master",
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help="Master address with running IPA for output connection check")
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replica_group.add_option("-a", "--auto-master-check", dest="auto_master_check",
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action="store_true",
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default=False,
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help="Automatically execute connection check on master")
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replica_group.add_option("-r", "--realm", dest="realm",
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help="Realm name")
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replica_group.add_option("-k", "--kdc", dest="kdc",
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help="Master KDC. Defaults to master address")
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replica_group.add_option("-p", "--principal", dest="principal",
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default=None, help="Principal to use to log in to remote master")
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replica_group.add_option("-w", "--password", dest="password", sensitive=True,
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help="Password for the principal")
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replica_group.add_option("--ca-cert-file", dest="ca_cert_file",
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type="string", action="callback",
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callback=ca_cert_file_callback,
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help="load the CA certificate from this file")
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parser.add_option_group(replica_group)
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master_group = OptionGroup(parser, "on-master options")
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master_group.add_option("-R", "--replica", dest="replica",
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help="Address of remote replica machine to check against")
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parser.add_option_group(master_group)
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common_group = OptionGroup(parser, "common options")
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common_group.add_option("-c", "--check-ca", dest="check_ca",
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action="store_true",
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default=False,
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help="Check also ports for Certificate Authority "
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"(for servers installed before IPA 3.1)")
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common_group.add_option("", "--hostname", dest="hostname",
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help="The hostname of this server (FQDN). "
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"By default the result of getfqdn() call from "
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"Python's socket module is used.")
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parser.add_option_group(common_group)
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parser.add_option("-d", "--debug", dest="debug",
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action="store_true",
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default=False, help="Print debugging information")
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parser.add_option("-q", "--quiet", dest="quiet",
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action="store_true",
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default=False, help="Output only errors")
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parser.add_option("--no-log", dest="log_to_file", action="store_false",
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default=True, help="Do not log into file")
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options, _args = parser.parse_args()
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safe_options = parser.get_safe_opts(options)
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if options.master and options.replica:
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parser.error("on-master and on-replica options are mutually exclusive!")
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if options.master:
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if options.auto_master_check and not options.realm:
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parser.error("Realm is parameter is required to connect to remote master!")
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if not os.getegid() == 0:
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parser.error("You can only run on-replica part as root.")
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if options.master and not options.kdc:
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options.kdc = options.master
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if not options.master and not options.replica:
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parser.error("No action: you should select either --replica or --master option.")
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if not options.hostname:
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options.hostname = socket.getfqdn()
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return safe_options, options
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def logging_setup(options):
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log_file = None
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if os.getegid() == 0 and options.log_to_file:
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log_file = paths.IPAREPLICA_CONNCHECK_LOG
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standard_logging_setup(log_file, verbose=(not options.quiet),
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debug=options.debug, console_format='%(message)s')
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def sigterm_handler(signum, frame):
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# do what SIGINT does (raise a KeyboardInterrupt)
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sigint_handler = signal.getsignal(signal.SIGINT)
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if callable(sigint_handler):
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sigint_handler(signum, frame)
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def configure_krb5_conf(realm, kdc, filename):
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krbconf = ipaclient.install.ipachangeconf.IPAChangeConf("IPA Installer")
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krbconf.setOptionAssignment((" = ", " "))
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krbconf.setSectionNameDelimiters(("[","]"))
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krbconf.setSubSectionDelimiters(("{","}"))
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krbconf.setIndent((""," "," "))
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opts = [{'name':'comment', 'type':'comment', 'value':'File created by ipa-replica-conncheck'},
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{'name':'empty', 'type':'empty'}]
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#[libdefaults]
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libdefaults = [{'name':'default_realm', 'type':'option', 'value':realm}]
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libdefaults.append({'name':'dns_lookup_realm', 'type':'option', 'value':'false'})
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libdefaults.append({'name':'dns_lookup_kdc', 'type':'option', 'value':'true'})
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libdefaults.append({'name':'rdns', 'type':'option', 'value':'false'})
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libdefaults.append({'name':'ticket_lifetime', 'type':'option', 'value':'24h'})
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libdefaults.append({'name':'forwardable', 'type':'option', 'value':'true'})
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libdefaults.append({'name':'udp_preference_limit', 'type':'option', 'value':'0'})
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opts.append({'name':'libdefaults', 'type':'section', 'value': libdefaults})
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opts.append({'name':'empty', 'type':'empty'})
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#the following are necessary only if DNS discovery does not work
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#[realms]
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realms_info =[{'name':'kdc', 'type':'option', 'value':ipautil.format_netloc(kdc, 88)},
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{'name':'master_kdc', 'type':'option', 'value':ipautil.format_netloc(kdc, 88)},
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{'name':'admin_server', 'type':'option', 'value':ipautil.format_netloc(kdc, 749)}]
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realms = [{'name':realm, 'type':'subsection', 'value':realms_info}]
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opts.append({'name':'realms', 'type':'section', 'value':realms})
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opts.append({'name':'empty', 'type':'empty'})
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#[appdefaults]
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pamopts = [{'name':'debug', 'type':'option', 'value':'false'},
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{'name':'ticket_lifetime', 'type':'option', 'value':'36000'},
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{'name':'renew_lifetime', 'type':'option', 'value':'36000'},
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{'name':'forwardable', 'type':'option', 'value':'true'},
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{'name':'krb4_convert', 'type':'option', 'value':'false'}]
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appopts = [{'name':'pam', 'type':'subsection', 'value':pamopts}]
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opts.append({'name':'appdefaults', 'type':'section', 'value':appopts})
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root_logger.debug("Writing temporary Kerberos configuration to %s:\n%s"
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% (filename, krbconf.dump(opts)))
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krbconf.newConf(filename, opts)
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class PortResponder(threading.Thread):
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PROTO = {socket.SOCK_STREAM: 'tcp',
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socket.SOCK_DGRAM: 'udp'}
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def __init__(self, ports):
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"""
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ports: a list of CheckedPort
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"""
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super(PortResponder, self).__init__()
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# copy ports to avoid the need to synchronize it between threads
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self.ports = copy.deepcopy(ports)
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self._sockets = []
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self._close = False
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self._close_lock = threading.Lock()
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self.responder_data = 'FreeIPA'
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self.ports_opened = False
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self.ports_open_cond = threading.Condition()
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def run(self):
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root_logger.debug('Starting listening thread.')
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for port in self.ports:
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self._bind_to_port(port.port, port.port_type)
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with self.ports_open_cond:
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self.ports_opened = True
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root_logger.debug('Ports opened, notify original thread')
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self.ports_open_cond.notify()
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while not self._is_closing():
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ready_socks, _socks1, _socks2 = select.select(
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self._sockets, [], [], 1)
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if ready_socks:
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ready_sock = ready_socks[0]
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self._respond(ready_sock)
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for sock in self._sockets:
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port = sock.getsockname()[1]
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proto = PortResponder.PROTO[sock.type]
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sock.close()
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root_logger.debug('%(port)d %(proto)s: Stopped listening' %
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dict(port=port, proto=proto))
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def _is_closing(self):
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with self._close_lock:
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return self._close
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def _bind_to_port(self, port, socket_type):
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# Use IPv6 socket as it is able to accept both IPv6 and IPv4
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# connections. Since IPv6 kernel module is required by other
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# parts of IPA, it should always be available.
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family = socket.AF_INET6
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host = '::' # all available interfaces
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proto = PortResponder.PROTO[socket_type]
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try:
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sock = socket.socket(family, socket_type)
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# Make sure IPv4 clients can connect to IPv6 socket
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sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
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if socket_type == socket.SOCK_STREAM:
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.bind((host, port))
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if socket_type == socket.SOCK_STREAM:
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# There might be a delay before accepting the connection,
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# because a single thread is used to handle all the
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# connections. Thus a backlog size of at least 1 is needed.
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sock.listen(1)
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root_logger.debug('%(port)d %(proto)s: Started listening' %
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dict(port=port, proto=proto))
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except socket.error as e:
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root_logger.warning('%(port)d %(proto)s: Failed to bind' %
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dict(port=port, proto=proto))
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root_logger.debug(traceback.format_exc(e))
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else:
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self._sockets.append(sock)
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def _respond(self, sock):
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port = sock.getsockname()[1]
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if sock.type == socket.SOCK_STREAM:
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connection, addr = sock.accept()
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try:
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connection.sendall(self.responder_data)
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root_logger.debug('%(port)d tcp: Responded to %(addr)s' %
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dict(port=port, addr=addr[0]))
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finally:
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connection.close()
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elif sock.type == socket.SOCK_DGRAM:
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_data, addr = sock.recvfrom(1)
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sock.sendto(self.responder_data, addr)
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root_logger.debug('%(port)d udp: Responded to %(addr)s' %
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dict(port=port, addr=addr[0]))
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def stop(self):
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root_logger.debug('Stopping listening thread.')
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with self._close_lock:
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self._close = True
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def port_check(host, port_list):
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ports_failed = []
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ports_udp_warning = [] # conncheck could not verify that port is open
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for port in port_list:
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try:
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port_open = ipautil.host_port_open(host, port.port,
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port.port_type, socket_timeout=CONNECT_TIMEOUT)
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except socket.gaierror:
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raise RuntimeError("Port check failed! Unable to resolve host name '%s'" % host)
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if port_open:
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result = "OK"
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else:
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if port.port_type == socket.SOCK_DGRAM:
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ports_udp_warning.append(port)
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result = "WARNING"
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else:
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ports_failed.append(port)
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result = "FAILED"
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root_logger.info(" %s (%d): %s" % (port.description, port.port, result))
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if ports_udp_warning:
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root_logger.warning(
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("The following UDP ports could not be verified as open: %s\n"
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"This can happen if they are already bound to an application\n"
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"and ipa-replica-conncheck cannot attach own UDP responder.")
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% ", ".join(str(port.port) for port in ports_udp_warning))
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if ports_failed:
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msg_ports = []
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for port in ports_failed:
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port_type_text = "TCP" if port.port_type == SOCK_STREAM else "UDP"
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msg_ports.append('%d (%s)' % (port.port, port_type_text))
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raise RuntimeError("Port check failed! Inaccessible port(s): %s" \
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% ", ".join(msg_ports))
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def main():
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global RESPONDER
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safe_options, options = parse_options()
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logging_setup(options)
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root_logger.debug('%s was invoked with options: %s' % (sys.argv[0], safe_options))
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root_logger.debug("missing options might be asked for interactively later\n")
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root_logger.debug('IPA version %s' % version.VENDOR_VERSION)
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signal.signal(signal.SIGTERM, sigterm_handler)
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required_ports = BASE_PORTS
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if options.check_ca:
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# Check old Dogtag CA replication port
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# New installs with unified databases use main DS port (checked above)
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required_ports.append(CheckedPort(7389, SOCK_STREAM,
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"PKI-CA: Directory Service port"))
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if options.replica:
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root_logger.info("Check connection from master to remote replica '%s':"
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% options.replica)
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port_check(options.replica, required_ports)
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root_logger.info("\nConnection from master to replica is OK.")
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# kinit to foreign master
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if options.master:
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# check ports on master first
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root_logger.info("Check connection from replica to remote master '%s':"
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% options.master)
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tcp_ports = [ port for port in required_ports if port.port_type == SOCK_STREAM ]
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udp_ports = [ port for port in required_ports if port.port_type == SOCK_DGRAM ]
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port_check(options.master, tcp_ports)
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if udp_ports:
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root_logger.info("\nThe following list of ports use UDP protocol"
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"and would need to be\n"
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"checked manually:")
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for port in udp_ports:
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result = "SKIPPED"
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root_logger.info(" %s (%d): %s"
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% (port.description, port.port, result))
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root_logger.info("\nConnection from replica to master is OK.")
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# create listeners
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root_logger.info("Start listening on required ports for remote "
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"master check")
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RESPONDER = PortResponder(required_ports)
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|
RESPONDER.start()
|
|
|
|
with RESPONDER.ports_open_cond:
|
|
if not RESPONDER.ports_opened:
|
|
root_logger.debug('Original thread stopped')
|
|
RESPONDER.ports_open_cond.wait()
|
|
root_logger.debug('Original thread resumed')
|
|
|
|
remote_check_opts = ['--replica %s' % options.hostname]
|
|
|
|
if options.auto_master_check:
|
|
root_logger.info("Get credentials to log in to remote master")
|
|
cred = None
|
|
if options.principal is None:
|
|
# Check if ccache is available
|
|
try:
|
|
root_logger.debug('KRB5CCNAME set to %s' %
|
|
os.environ.get('KRB5CCNAME', None))
|
|
# get default creds, will raise if none found
|
|
cred = gssapi.creds.Credentials()
|
|
principal = str(cred.name)
|
|
except gssapi.raw.misc.GSSError as e:
|
|
root_logger.debug('Failed to find default ccache: %s' % e)
|
|
# Use admin as the default principal
|
|
principal = "admin"
|
|
else:
|
|
principal = options.principal
|
|
|
|
if cred is None:
|
|
(krb_fd, krb_name) = tempfile.mkstemp()
|
|
os.close(krb_fd)
|
|
configure_krb5_conf(options.realm, options.kdc, krb_name)
|
|
global KRB5_CONFIG
|
|
KRB5_CONFIG = krb_name
|
|
(ccache_fd, ccache_name) = tempfile.mkstemp()
|
|
os.close(ccache_fd)
|
|
global CCACHE_FILE
|
|
CCACHE_FILE = ccache_name
|
|
|
|
if principal.find('@') == -1:
|
|
principal = '%s@%s' % (principal, options.realm)
|
|
|
|
if options.password:
|
|
password=options.password
|
|
else:
|
|
password = installutils.read_password(principal, confirm=False,
|
|
validate=False, retry=False)
|
|
if password is None:
|
|
sys.exit("Principal password required")
|
|
|
|
|
|
result = ipautil.run([paths.KINIT, principal],
|
|
env={'KRB5_CONFIG':KRB5_CONFIG, 'KRB5CCNAME':CCACHE_FILE},
|
|
stdin=password, raiseonerr=False, capture_error=True)
|
|
if result.returncode != 0:
|
|
raise RuntimeError("Cannot acquire Kerberos ticket: %s" %
|
|
result.error_output)
|
|
|
|
# Verify kinit was actually successful
|
|
result = ipautil.run([paths.BIN_KVNO,
|
|
'host/%s' % options.master],
|
|
env={'KRB5_CONFIG':KRB5_CONFIG, 'KRB5CCNAME':CCACHE_FILE},
|
|
raiseonerr=False, capture_error=True)
|
|
if result.returncode != 0:
|
|
raise RuntimeError("Could not get ticket for master server: %s" %
|
|
result.error_output)
|
|
|
|
try:
|
|
root_logger.info("Check RPC connection to remote master")
|
|
|
|
xmlrpc_uri = ('https://%s/ipa/xml' %
|
|
ipautil.format_netloc(options.master))
|
|
|
|
if options.ca_cert_file:
|
|
nss_dir = None
|
|
else:
|
|
nss_dir = paths.IPA_NSSDB_DIR
|
|
|
|
with certdb.NSSDatabase(nss_dir) as nss_db:
|
|
if options.ca_cert_file:
|
|
nss_dir = nss_db.secdir
|
|
|
|
password = ipautil.ipa_generate_password()
|
|
password_file = ipautil.write_tmp_file(password)
|
|
nss_db.create_db(password_file.name)
|
|
|
|
ca_certs = x509.load_certificate_list_from_file(
|
|
options.ca_cert_file)
|
|
for ca_cert in ca_certs:
|
|
data = ca_cert.public_bytes(
|
|
serialization.Encoding.DER)
|
|
nss_db.add_cert(
|
|
data, str(DN(ca_cert.subject)), 'C,,')
|
|
else:
|
|
nss_dir = None
|
|
|
|
api.bootstrap(context='client',
|
|
confdir=paths.ETC_IPA,
|
|
xmlrpc_uri=xmlrpc_uri,
|
|
nss_dir=nss_db.secdir)
|
|
api.finalize()
|
|
try:
|
|
api.Backend.rpcclient.connect()
|
|
api.Command.ping()
|
|
except Exception as e:
|
|
root_logger.info(
|
|
"Could not connect to the remote host: %s" % e)
|
|
raise
|
|
|
|
root_logger.info("Execute check on remote master")
|
|
try:
|
|
result = api.Backend.rpcclient.forward(
|
|
'server_conncheck',
|
|
ipautil.fsdecode(options.master),
|
|
ipautil.fsdecode(options.hostname),
|
|
version=u'2.162',
|
|
)
|
|
except (errors.CommandError, errors.NetworkError) as e:
|
|
root_logger.info(
|
|
"Remote master does not support check over RPC: "
|
|
"%s" % e)
|
|
raise
|
|
except errors.PublicError as e:
|
|
returncode = 1
|
|
stderr = e
|
|
else:
|
|
for message in result['messages']:
|
|
root_logger.info(message['message'])
|
|
returncode = int(not result['result'])
|
|
stderr = ("ipa-replica-conncheck returned non-zero "
|
|
"exit code")
|
|
finally:
|
|
if api.Backend.rpcclient.isconnected():
|
|
api.Backend.rpcclient.disconnect()
|
|
except Exception:
|
|
root_logger.info("Retrying using SSH...")
|
|
|
|
# Ticket 5812 Always qualify requests for admin
|
|
user = principal
|
|
ssh = SshExec(user, options.master)
|
|
|
|
root_logger.info("Check SSH connection to remote master")
|
|
result = ssh('echo OK', verbose=True)
|
|
if result.returncode != 0:
|
|
root_logger.debug(result.error_output)
|
|
raise RuntimeError(
|
|
'Could not SSH to remote host.\n'
|
|
'See /var/log/ipareplica-conncheck.log for more '
|
|
'information.')
|
|
|
|
root_logger.info("Execute check on remote master")
|
|
result = ssh(
|
|
"/usr/sbin/ipa-replica-conncheck " +
|
|
" ".join(remote_check_opts))
|
|
returncode = result.returncode
|
|
stderr = result.error_output
|
|
root_logger.info(result.output)
|
|
if returncode != 0:
|
|
raise RuntimeError(
|
|
"Remote master check failed with following "
|
|
"error message(s):\n%s" % stderr)
|
|
else:
|
|
# wait until user test is ready
|
|
root_logger.info(
|
|
"Listeners are started. Use CTRL+C to terminate the listening "
|
|
"part after the test.\n\n"
|
|
"Please run the following command on remote master:\n"
|
|
"/usr/sbin/ipa-replica-conncheck {opts}".format(
|
|
opts=" ".join(remote_check_opts)))
|
|
time.sleep(3600)
|
|
root_logger.info(
|
|
"Connection check timeout: terminating listening program")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
try:
|
|
sys.exit(main())
|
|
except KeyboardInterrupt:
|
|
root_logger.info("\nCleaning up...")
|
|
sys.exit(1)
|
|
except RuntimeError as e:
|
|
root_logger.error('ERROR: {ex}'.format(ex=e))
|
|
sys.exit(1)
|
|
finally:
|
|
if RESPONDER is not None:
|
|
RESPONDER.stop()
|
|
RESPONDER.join()
|
|
for file_name in (CCACHE_FILE, KRB5_CONFIG):
|
|
if file_name:
|
|
try:
|
|
os.remove(file_name)
|
|
except OSError:
|
|
pass
|