summaryrefslogtreecommitdiffstats
path: root/install/tools/ipa-replica-conncheck
blob: 48ff336ff23e780403e56b685e8fb4bc286159c9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
#! /usr/bin/python -E
# Authors: Martin Kosek <mkosek@redhat.com>
#
# Copyright (C) 2011  Red Hat
# see file 'COPYING' for use and warranty information
#
# This program 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.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#

from ipapython.config import IPAOptionParser
from ipapython import version
from ipapython import ipautil
from ipapython.ipautil import CalledProcessError
import ipaclient.ipachangeconf
from optparse import OptionGroup
import logging
import sys
import os
import signal
import tempfile
import getpass
import socket
import time
import threading
import errno

CONNECT_TIMEOUT = 5
RESPONDERS = [ ]
QUIET = False
CCACHE_FILE = "/etc/ipa/.conncheck_ccache"
KRB5_CONFIG = None

class CheckedPort(object):
    def __init__(self, port, stream, description):
        self.port = port
        self.stream = stream
        self.description = description

BASE_PORTS = [
                CheckedPort(389, True, "Directory Service: Unsecure port"),
                CheckedPort(636, True, "Directory Service: Secure port"),
                CheckedPort(88, True, "Kerberos KDC: TCP"),
                CheckedPort(88, False, "Kerberos KDC: UDP"),
                CheckedPort(464, True, "Kerberos Kpasswd: TCP"),
                CheckedPort(464, False, "Kerberos Kpasswd: UDP"),
                CheckedPort(80, True, "HTTP Server: port 80"),
                CheckedPort(443, True, "HTTP Server: port 443(https)"),
             ]

CA_PORTS  = [
                CheckedPort(7389, True, "PKI-CA: Directory Service port"),
            ]

def print_info(msg):
    if not QUIET:
        print msg

def parse_options():
    parser = IPAOptionParser(version=version.VERSION)

    replica_group = OptionGroup(parser, "on-replica options")
    replica_group.add_option("-m", "--master", dest="master",
                      help="Master address with running IPA for output connection check")
    replica_group.add_option("-a", "--auto-master-check", dest="auto_master_check",
                      action="store_true",
                      default=False,
                      help="Automatically execute connection check on master")
    replica_group.add_option("-r", "--realm", dest="realm",
                      help="Realm name")
    replica_group.add_option("-k", "--kdc", dest="kdc",
                      help="Master KDC. Defaults to master address")
    replica_group.add_option("-p", "--principal", dest="principal",
                      default="admin", help="Principal to use to log in to remote master")
    replica_group.add_option("-w", "--password", dest="password", sensitive=True,
                      help="Password for the principal"),
    parser.add_option_group(replica_group)


    master_group = OptionGroup(parser, "on-master options")
    master_group.add_option("-R", "--replica", dest="replica",
                      help="Address of remote replica machine to check against")
    parser.add_option_group(master_group)

    common_group = OptionGroup(parser, "common options")
    common_group.add_option("-c", "--check-ca", dest="check_ca",
                      action="store_true",
                      default=False,
                      help="Check also ports for Certificate Authority")

    common_group.add_option("", "--hostname", dest="hostname",
                      help="The hostname of this server (FQDN). "
                           "By default a nodename from uname(2) is used.")
    parser.add_option_group(common_group)

    parser.add_option("-d", "--debug", dest="debug",
                      action="store_true",
                      default=False, help="Print debugging information")
    parser.add_option("-q", "--quiet", dest="quiet",
                      action="store_true",
                      default=False, help="Output only errors")

    options, args = parser.parse_args()
    safe_options = parser.get_safe_opts(options)

    if options.master and options.replica:
        parser.error("on-master and on-replica options are mutually exclusive!")

    if options.master:
        if options.auto_master_check and not options.realm:
            parser.error("Realm is parameter is required to connect to remote master!")
        if not os.getegid() == 0:
            parser.error("You can only run on-replica part as root.")

    if options.master and not options.kdc:
       options.kdc = options.master

    if not options.master and not options.replica:
       parser.error("No action: you should select either --replica or --master option.")

    if not options.hostname:
        options.hostname = socket.getfqdn()

    if options.quiet:
        global QUIET
        QUIET = True

    return safe_options, options

def logging_setup(options):
    if os.getegid() == 0:
        log_file = "/var/log/ipareplica-conncheck.log"
        old_umask = os.umask(077)
        logging.basicConfig(level=logging.DEBUG,
                        format='%(asctime)s %(levelname)s %(message)s',
                        filename=log_file,
                        filemode='w')
        os.umask(old_umask)

    console = logging.StreamHandler()
    # If the debug option is set, also log debug messages to the console
    if options.debug:
        console.setLevel(logging.DEBUG)
    else:
        # Otherwise, log critical and error messages
        console.setLevel(logging.ERROR)
    formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')
    console.setFormatter(formatter)
    logging.getLogger('').addHandler(console)

def clean_responders(responders):
    if not responders:
        return

    for responder in responders:
        responder.stop()

    for responder in responders:
        responder.join()
        responders.remove(responder)

def sigterm_handler(signum, frame):
    print_info("\nCleaning up...")

    global RESPONDERS
    clean_responders(RESPONDERS)

    sys.exit(1)

def configure_krb5_conf(realm, kdc, filename):

    krbconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
    krbconf.setOptionAssignment(" = ")
    krbconf.setSectionNameDelimiters(("[","]"))
    krbconf.setSubSectionDelimiters(("{","}"))
    krbconf.setIndent(("","  ","    "))

    opts = [{'name':'comment', 'type':'comment', 'value':'File created by ipa-replica-conncheck'},
            {'name':'empty', 'type':'empty'}]

    #[libdefaults]
    libdefaults = [{'name':'default_realm', 'type':'option', 'value':realm}]
    libdefaults.append({'name':'dns_lookup_realm', 'type':'option', 'value':'false'})
    libdefaults.append({'name':'dns_lookup_kdc', 'type':'option', 'value':'false'})
    libdefaults.append({'name':'rdns', 'type':'option', 'value':'false'})
    libdefaults.append({'name':'ticket_lifetime', 'type':'option', 'value':'24h'})
    libdefaults.append({'name':'forwardable', 'type':'option', 'value':'yes'})

    opts.append({'name':'libdefaults', 'type':'section', 'value': libdefaults})
    opts.append({'name':'empty', 'type':'empty'})

    #the following are necessary only if DNS discovery does not work
    #[realms]
    realms_info =[{'name':'kdc', 'type':'option', 'value':kdc+':88'},
                 {'name':'admin_server', 'type':'option', 'value':kdc+':749'}]
    realms = [{'name':realm, 'type':'subsection', 'value':realms_info}]

    opts.append({'name':'realms', 'type':'section', 'value':realms})
    opts.append({'name':'empty', 'type':'empty'})

    #[appdefaults]
    pamopts = [{'name':'debug', 'type':'option', 'value':'false'},
               {'name':'ticket_lifetime', 'type':'option', 'value':'36000'},
               {'name':'renew_lifetime', 'type':'option', 'value':'36000'},
               {'name':'forwardable', 'type':'option', 'value':'true'},
               {'name':'krb4_convert', 'type':'option', 'value':'false'}]
    appopts = [{'name':'pam', 'type':'subsection', 'value':pamopts}]
    opts.append({'name':'appdefaults', 'type':'section', 'value':appopts})

    logging.debug("Writing temporary Kerberos configuration to %s:\n%s"
            % (filename, krbconf.dump(opts)))

    krbconf.newConf(filename, opts)

class PortResponder(threading.Thread):

    def __init__(self, port, socket_stream = True, socket_timeout=1):
        super(PortResponder, self).__init__()
        self.port = port
        self.socket_stream = socket_stream
        self.socket_timeout = socket_timeout
        self._stop_request = False

    def run(self):
        while not self._stop_request:
            try:
                ipautil.bind_port_responder(self.port, self.socket_stream,
                        self.socket_timeout, responder_data="FreeIPA")
            except socket.timeout:
                pass
            except socket.error, e:
                if e.errno == errno.EADDRINUSE:
                    time.sleep(1)
                else:
                    raise

    def stop(self):
        self._stop_request = True

def port_check(host, port_list):
    failed_ports = []
    for port in port_list:
        if ipautil.host_port_open(host, port.port, port.stream, CONNECT_TIMEOUT):
            result = "OK"
        else:
            failed_ports.append(port)
            result = "FAILED"
        print_info("   %s (%d): %s" % (port.description, port.port, result))

    if failed_ports:
        msg_ports = ", ".join([str(port.port) for port in failed_ports])
        raise RuntimeError("Port check failed! Inaccessible port(s): %s" % msg_ports)

def main():
    safe_options, options = parse_options()

    logging_setup(options)
    logging.debug('%s was invoked with options: %s' % (sys.argv[0], safe_options))
    logging.debug("missing options might be asked for interactively later\n")

    signal.signal(signal.SIGTERM, sigterm_handler)
    signal.signal(signal.SIGINT, sigterm_handler)

    required_ports = BASE_PORTS
    if options.check_ca:
        required_ports.extend(CA_PORTS)

    if options.replica:
        print_info("Check connection from master to remote replica '%s':" % options.replica)
        port_check(options.replica, required_ports)
        print_info("\nConnection from master to replica is OK.")

    # kinit to foreign master
    if options.master:
        # check ports on master first
        print_info("Check connection from replica to remote master '%s':" % options.master)
        port_check( options.master, required_ports)
        print_info("\nConnection from replica to master is OK.")

        # create listeners
        global RESPONDERS
        print_info("Start listening on required ports for remote master check")
        for port in required_ports:
            logging.debug("Start listening on port %d (%s)" % (port.port, port.description))
            responder = PortResponder(port.port, port.stream)
            responder.start()
            RESPONDERS.append(responder)

        if options.auto_master_check:
            (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

            print_info("Get credentials to log in to remote master")
            if options.principal.find('@') == -1:
                principal = '%s@%s' % (options.principal, options.realm)
                user = options.principal
            else:
                principal = options.principal
                user = options.principal.partition('@')[0]

            if options.password:
                password=options.password
            else:
                password = getpass.getpass("Password for %s: " % principal)

            stderr=''
            (stdout, stderr, returncode) = ipautil.run(['/usr/bin/kinit', principal],
                 env={'KRB5_CONFIG':KRB5_CONFIG, 'KRB5CCNAME':CCACHE_FILE},
                 stdin=password, raiseonerr=False)
            if returncode != 0:
                raise RuntimeError("Cannot acquire Kerberos ticket: %s" % stderr)

            # Verify kinit was actually successful
            stderr=''
            (stdout, stderr, returncode) = ipautil.run(['/usr/bin/kvno',
                 'host/%s' % options.master],
                 env={'KRB5_CONFIG':KRB5_CONFIG, 'KRB5CCNAME':CCACHE_FILE},
                 raiseonerr=False)
            if returncode != 0:
                raise RuntimeError("Could not get ticket for master server: %s" % stderr)

            remote_check_opts = ['--replica %s' % options.hostname]
            if options.check_ca:
                remote_check_opts.append('--check-ca')

            print_info("Execute check on remote master")

            stderr = ''
            remote_addr = "%s@%s" % (user, options.master)
            (stdout, stderr, returncode) = ipautil.run(['/usr/bin/ssh',
                '-q', '-o StrictHostKeychecking=no',
                '-o UserKnownHostsFile=/dev/null', remote_addr,
                "/usr/sbin/ipa-replica-conncheck " + " ".join(remote_check_opts)],
                env={'KRB5_CONFIG':KRB5_CONFIG, 'KRB5CCNAME' : CCACHE_FILE},
                raiseonerr=False)

            print_info(stdout)

            if returncode != 0:
                raise RuntimeError("Remote master check failed with following error message(s):\n%s" % stderr)
        else:
            # wait until user  test is ready
            print_info("Listeners are started. Use CTRL+C to terminate the listening part after the test.")
            print_info("")
            print_info("Please run the following command on remote master:")

            remote_check_opts = ['--replica %s' % options.hostname]
            if options.check_ca:
                remote_check_opts.append('--check-ca')
            print_info("/usr/sbin/ipa-replica-conncheck " + " ".join(remote_check_opts))
            time.sleep(3600)
            print_info("Connection check timeout: terminating listening program")

if __name__ == "__main__":
    try:
        sys.exit(main())
    except SystemExit, e:
        sys.exit(e)
    except KeyboardInterrupt:
        sys.exit(1)
    except RuntimeError, e:
        sys.exit(e)
    finally:
        clean_responders(RESPONDERS)
        for file_name in (CCACHE_FILE, KRB5_CONFIG):
            if file_name:
                try:
                    os.remove(file_name)
                except OSError:
                    pass