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1 | 05cd934d | René Nussbaumer | #!/usr/bin/python |
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2 | 05cd934d | René Nussbaumer | # |
3 | 05cd934d | René Nussbaumer | |
4 | f1bebf4c | Iustin Pop | # Copyright (C) 2010, 2012 Google Inc. |
5 | 05cd934d | René Nussbaumer | # |
6 | 05cd934d | René Nussbaumer | # This program is free software; you can redistribute it and/or modify |
7 | 05cd934d | René Nussbaumer | # it under the terms of the GNU General Public License as published by |
8 | 05cd934d | René Nussbaumer | # the Free Software Foundation; either version 2 of the License, or |
9 | 05cd934d | René Nussbaumer | # (at your option) any later version. |
10 | 05cd934d | René Nussbaumer | # |
11 | 05cd934d | René Nussbaumer | # This program is distributed in the hope that it will be useful, but |
12 | 05cd934d | René Nussbaumer | # WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | 05cd934d | René Nussbaumer | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | 05cd934d | René Nussbaumer | # General Public License for more details. |
15 | 05cd934d | René Nussbaumer | # |
16 | 05cd934d | René Nussbaumer | # You should have received a copy of the GNU General Public License |
17 | 05cd934d | René Nussbaumer | # along with this program; if not, write to the Free Software |
18 | 05cd934d | René Nussbaumer | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
19 | 05cd934d | René Nussbaumer | # 02110-1301, USA. |
20 | 05cd934d | René Nussbaumer | |
21 | 05cd934d | René Nussbaumer | """Tool to setup the SSH configuration on a remote node. |
22 | 05cd934d | René Nussbaumer | |
23 | 05cd934d | René Nussbaumer | This is needed before we can join the node into the cluster. |
24 | 05cd934d | René Nussbaumer | |
25 | 05cd934d | René Nussbaumer | """ |
26 | 05cd934d | René Nussbaumer | |
27 | b459a848 | Andrea Spadaccini | # pylint: disable=C0103 |
28 | c9a4a662 | Manuel Franceschini | # C0103: Invalid name setup-ssh |
29 | c9a4a662 | Manuel Franceschini | |
30 | 05cd934d | René Nussbaumer | import getpass |
31 | 05cd934d | René Nussbaumer | import logging |
32 | 05cd934d | René Nussbaumer | import os.path |
33 | 05cd934d | René Nussbaumer | import optparse |
34 | 05cd934d | René Nussbaumer | import sys |
35 | 05cd934d | René Nussbaumer | |
36 | 3ec10f0d | Iustin Pop | # workaround paramiko warnings |
37 | 3ec10f0d | Iustin Pop | # FIXME: use 'with warnings.catch_warnings' once we drop Python 2.4 |
38 | 3ec10f0d | Iustin Pop | import warnings |
39 | 3ec10f0d | Iustin Pop | warnings.simplefilter("ignore") |
40 | 3ec10f0d | Iustin Pop | import paramiko |
41 | 3ec10f0d | Iustin Pop | warnings.resetwarnings() |
42 | 3ec10f0d | Iustin Pop | |
43 | 05cd934d | René Nussbaumer | from ganeti import cli |
44 | 05cd934d | René Nussbaumer | from ganeti import constants |
45 | 05cd934d | René Nussbaumer | from ganeti import errors |
46 | 05cd934d | René Nussbaumer | from ganeti import netutils |
47 | d3b18b8e | René Nussbaumer | from ganeti import ssconf |
48 | 05cd934d | René Nussbaumer | from ganeti import ssh |
49 | 05cd934d | René Nussbaumer | from ganeti import utils |
50 | 05cd934d | René Nussbaumer | |
51 | 05cd934d | René Nussbaumer | |
52 | 05cd934d | René Nussbaumer | class RemoteCommandError(errors.GenericError): |
53 | 05cd934d | René Nussbaumer | """Exception if remote command was not successful. |
54 | 05cd934d | René Nussbaumer | |
55 | 05cd934d | René Nussbaumer | """ |
56 | 05cd934d | René Nussbaumer | |
57 | 05cd934d | René Nussbaumer | |
58 | d3b18b8e | René Nussbaumer | class JoinCheckError(errors.GenericError): |
59 | d3b18b8e | René Nussbaumer | """Exception raised if join check fails. |
60 | d3b18b8e | René Nussbaumer | |
61 | d3b18b8e | René Nussbaumer | """ |
62 | d3b18b8e | René Nussbaumer | |
63 | d3b18b8e | René Nussbaumer | |
64 | c4da9eaf | René Nussbaumer | class HostKeyVerificationError(errors.GenericError): |
65 | c4da9eaf | René Nussbaumer | """Exception if host key do not match. |
66 | c4da9eaf | René Nussbaumer | |
67 | c4da9eaf | René Nussbaumer | """ |
68 | c4da9eaf | René Nussbaumer | |
69 | c4da9eaf | René Nussbaumer | |
70 | c4da9eaf | René Nussbaumer | class AuthError(errors.GenericError): |
71 | c4da9eaf | René Nussbaumer | """Exception for authentication errors to hosts. |
72 | c4da9eaf | René Nussbaumer | |
73 | c4da9eaf | René Nussbaumer | """ |
74 | c4da9eaf | René Nussbaumer | |
75 | c4da9eaf | René Nussbaumer | |
76 | d3b18b8e | René Nussbaumer | def _CheckJoin(transport): |
77 | d3b18b8e | René Nussbaumer | """Checks if a join is safe or dangerous. |
78 | d3b18b8e | René Nussbaumer | |
79 | d3b18b8e | René Nussbaumer | Note: This function relies on the fact, that all |
80 | d3b18b8e | René Nussbaumer | hosts have the same configuration at compile time of |
81 | d3b18b8e | René Nussbaumer | Ganeti. So that the constants do not mismatch. |
82 | d3b18b8e | René Nussbaumer | |
83 | d3b18b8e | René Nussbaumer | @param transport: The paramiko transport instance |
84 | d3b18b8e | René Nussbaumer | @return: True if the join is safe; False otherwise |
85 | d3b18b8e | René Nussbaumer | |
86 | d3b18b8e | René Nussbaumer | """ |
87 | d3b18b8e | René Nussbaumer | sftp = transport.open_sftp_client() |
88 | d3b18b8e | René Nussbaumer | ss = ssconf.SimpleStore() |
89 | d3b18b8e | René Nussbaumer | ss_cluster_name_path = ss.KeyToFilename(constants.SS_CLUSTER_NAME) |
90 | d3b18b8e | René Nussbaumer | |
91 | c4da9eaf | René Nussbaumer | cluster_files = [ |
92 | c4da9eaf | René Nussbaumer | (constants.NODED_CERT_FILE, utils.ReadFile(constants.NODED_CERT_FILE)), |
93 | c4da9eaf | René Nussbaumer | (ss_cluster_name_path, utils.ReadFile(ss_cluster_name_path)), |
94 | c4da9eaf | René Nussbaumer | ] |
95 | d3b18b8e | René Nussbaumer | |
96 | c4da9eaf | René Nussbaumer | for (filename, local_content) in cluster_files: |
97 | c4da9eaf | René Nussbaumer | try: |
98 | c4da9eaf | René Nussbaumer | remote_content = _ReadSftpFile(sftp, filename) |
99 | c4da9eaf | René Nussbaumer | except IOError, err: |
100 | c4da9eaf | René Nussbaumer | # Assume file does not exist. Paramiko's error reporting is lacking. |
101 | c4da9eaf | René Nussbaumer | logging.debug("Failed to read %s: %s", filename, err) |
102 | c4da9eaf | René Nussbaumer | continue |
103 | d3b18b8e | René Nussbaumer | |
104 | c4da9eaf | René Nussbaumer | if remote_content != local_content: |
105 | c4da9eaf | René Nussbaumer | logging.error("File %s doesn't match local version", filename) |
106 | c4da9eaf | René Nussbaumer | return False |
107 | d3b18b8e | René Nussbaumer | |
108 | c4da9eaf | René Nussbaumer | return True |
109 | d3b18b8e | René Nussbaumer | |
110 | d3b18b8e | René Nussbaumer | |
111 | 05cd934d | René Nussbaumer | def _RunRemoteCommand(transport, command): |
112 | 05cd934d | René Nussbaumer | """Invokes and wait for the command over SSH. |
113 | 05cd934d | René Nussbaumer | |
114 | 05cd934d | René Nussbaumer | @param transport: The paramiko transport instance |
115 | 05cd934d | René Nussbaumer | @param command: The command to be executed |
116 | 05cd934d | René Nussbaumer | |
117 | 05cd934d | René Nussbaumer | """ |
118 | 05cd934d | René Nussbaumer | chan = transport.open_session() |
119 | 05cd934d | René Nussbaumer | chan.set_combine_stderr(True) |
120 | 05cd934d | René Nussbaumer | output_handler = chan.makefile("r") |
121 | 05cd934d | René Nussbaumer | chan.exec_command(command) |
122 | 05cd934d | René Nussbaumer | |
123 | 05cd934d | René Nussbaumer | result = chan.recv_exit_status() |
124 | 05cd934d | René Nussbaumer | msg = output_handler.read() |
125 | 05cd934d | René Nussbaumer | |
126 | 05cd934d | René Nussbaumer | out_msg = "'%s' exited with status code %s, output %r" % (command, result, |
127 | 05cd934d | René Nussbaumer | msg) |
128 | 05cd934d | René Nussbaumer | |
129 | 05cd934d | René Nussbaumer | # If result is -1 (no exit status provided) we assume it was not successful |
130 | 05cd934d | René Nussbaumer | if result: |
131 | 05cd934d | René Nussbaumer | raise RemoteCommandError(out_msg) |
132 | 05cd934d | René Nussbaumer | |
133 | 05cd934d | René Nussbaumer | if msg: |
134 | 05cd934d | René Nussbaumer | logging.info(out_msg) |
135 | 05cd934d | René Nussbaumer | |
136 | 05cd934d | René Nussbaumer | |
137 | 05cd934d | René Nussbaumer | def _InvokeDaemonUtil(transport, command): |
138 | 05cd934d | René Nussbaumer | """Invokes daemon-util on the remote side. |
139 | 05cd934d | René Nussbaumer | |
140 | 05cd934d | René Nussbaumer | @param transport: The paramiko transport instance |
141 | 05cd934d | René Nussbaumer | @param command: The daemon-util command to be run |
142 | 05cd934d | René Nussbaumer | |
143 | 05cd934d | René Nussbaumer | """ |
144 | 05cd934d | René Nussbaumer | _RunRemoteCommand(transport, "%s %s" % (constants.DAEMON_UTIL, command)) |
145 | 05cd934d | René Nussbaumer | |
146 | 05cd934d | René Nussbaumer | |
147 | d3b18b8e | René Nussbaumer | def _ReadSftpFile(sftp, filename): |
148 | d3b18b8e | René Nussbaumer | """Reads a file over sftp. |
149 | d3b18b8e | René Nussbaumer | |
150 | d3b18b8e | René Nussbaumer | @param sftp: An open paramiko SFTP client |
151 | d3b18b8e | René Nussbaumer | @param filename: The filename of the file to read |
152 | d3b18b8e | René Nussbaumer | @return: The content of the file |
153 | d3b18b8e | René Nussbaumer | |
154 | d3b18b8e | René Nussbaumer | """ |
155 | d3b18b8e | René Nussbaumer | remote_file = sftp.open(filename, "r") |
156 | d3b18b8e | René Nussbaumer | try: |
157 | d3b18b8e | René Nussbaumer | return remote_file.read() |
158 | d3b18b8e | René Nussbaumer | finally: |
159 | d3b18b8e | René Nussbaumer | remote_file.close() |
160 | d3b18b8e | René Nussbaumer | |
161 | d3b18b8e | René Nussbaumer | |
162 | 05cd934d | René Nussbaumer | def _WriteSftpFile(sftp, name, perm, data): |
163 | 05cd934d | René Nussbaumer | """SFTPs data to a remote file. |
164 | 05cd934d | René Nussbaumer | |
165 | 05cd934d | René Nussbaumer | @param sftp: A open paramiko SFTP client |
166 | 05cd934d | René Nussbaumer | @param name: The remote file name |
167 | 05cd934d | René Nussbaumer | @param perm: The remote file permission |
168 | 05cd934d | René Nussbaumer | @param data: The data to write |
169 | 05cd934d | René Nussbaumer | |
170 | 05cd934d | René Nussbaumer | """ |
171 | 05cd934d | René Nussbaumer | remote_file = sftp.open(name, "w") |
172 | 05cd934d | René Nussbaumer | try: |
173 | 05cd934d | René Nussbaumer | sftp.chmod(name, perm) |
174 | 05cd934d | René Nussbaumer | remote_file.write(data) |
175 | 05cd934d | René Nussbaumer | finally: |
176 | 05cd934d | René Nussbaumer | remote_file.close() |
177 | 05cd934d | René Nussbaumer | |
178 | 05cd934d | René Nussbaumer | |
179 | 05cd934d | René Nussbaumer | def SetupSSH(transport): |
180 | 05cd934d | René Nussbaumer | """Sets the SSH up on the other side. |
181 | 05cd934d | René Nussbaumer | |
182 | 05cd934d | René Nussbaumer | @param transport: The paramiko transport instance |
183 | 05cd934d | René Nussbaumer | |
184 | 05cd934d | René Nussbaumer | """ |
185 | 05cd934d | René Nussbaumer | priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS) |
186 | 05cd934d | René Nussbaumer | keyfiles = [ |
187 | 05cd934d | René Nussbaumer | (constants.SSH_HOST_DSA_PRIV, 0600), |
188 | 05cd934d | René Nussbaumer | (constants.SSH_HOST_DSA_PUB, 0644), |
189 | 05cd934d | René Nussbaumer | (constants.SSH_HOST_RSA_PRIV, 0600), |
190 | 05cd934d | René Nussbaumer | (constants.SSH_HOST_RSA_PUB, 0644), |
191 | 05cd934d | René Nussbaumer | (priv_key, 0600), |
192 | 05cd934d | René Nussbaumer | (pub_key, 0644), |
193 | 05cd934d | René Nussbaumer | ] |
194 | 05cd934d | René Nussbaumer | |
195 | 05cd934d | René Nussbaumer | sftp = transport.open_sftp_client() |
196 | 05cd934d | René Nussbaumer | |
197 | 05cd934d | René Nussbaumer | filemap = dict((name, (utils.ReadFile(name), perm)) |
198 | 05cd934d | René Nussbaumer | for (name, perm) in keyfiles) |
199 | 05cd934d | René Nussbaumer | |
200 | 05cd934d | René Nussbaumer | auth_path = os.path.dirname(auth_keys) |
201 | 05cd934d | René Nussbaumer | |
202 | 05cd934d | René Nussbaumer | try: |
203 | 05cd934d | René Nussbaumer | sftp.mkdir(auth_path, 0700) |
204 | c4da9eaf | René Nussbaumer | except IOError, err: |
205 | 05cd934d | René Nussbaumer | # Sadly paramiko doesn't provide errno or similiar |
206 | 05cd934d | René Nussbaumer | # so we can just assume that the path already exists |
207 | c4da9eaf | René Nussbaumer | logging.info("Assuming directory %s on remote node exists: %s", |
208 | c4da9eaf | René Nussbaumer | auth_path, err) |
209 | 05cd934d | René Nussbaumer | |
210 | 05cd934d | René Nussbaumer | for name, (data, perm) in filemap.iteritems(): |
211 | 05cd934d | René Nussbaumer | _WriteSftpFile(sftp, name, perm, data) |
212 | 05cd934d | René Nussbaumer | |
213 | 05cd934d | René Nussbaumer | authorized_keys = sftp.open(auth_keys, "a+") |
214 | 05cd934d | René Nussbaumer | try: |
215 | 634a9a35 | Iustin Pop | # Due to the way SFTPFile and BufferedFile are implemented, |
216 | 634a9a35 | Iustin Pop | # opening in a+ mode and then issuing a read(), readline() or |
217 | 634a9a35 | Iustin Pop | # iterating over the file (which uses read() internally) will see |
218 | 634a9a35 | Iustin Pop | # an empty file, since the paramiko internal file position and the |
219 | 634a9a35 | Iustin Pop | # OS-level file-position are desynchronized; therefore, we issue |
220 | 634a9a35 | Iustin Pop | # an explicit seek to resynchronize these; writes should (note |
221 | 634a9a35 | Iustin Pop | # should) still go to the right place |
222 | 634a9a35 | Iustin Pop | authorized_keys.seek(0, 0) |
223 | 05cd934d | René Nussbaumer | # We don't have to close, as the close happened already in AddAuthorizedKey |
224 | 05cd934d | René Nussbaumer | utils.AddAuthorizedKey(authorized_keys, filemap[pub_key][0]) |
225 | 05cd934d | René Nussbaumer | finally: |
226 | 05cd934d | René Nussbaumer | authorized_keys.close() |
227 | 05cd934d | René Nussbaumer | |
228 | 05cd934d | René Nussbaumer | _InvokeDaemonUtil(transport, "reload-ssh-keys") |
229 | 05cd934d | René Nussbaumer | |
230 | 05cd934d | René Nussbaumer | |
231 | 05cd934d | René Nussbaumer | def ParseOptions(): |
232 | 05cd934d | René Nussbaumer | """Parses options passed to program. |
233 | 05cd934d | René Nussbaumer | |
234 | 05cd934d | René Nussbaumer | """ |
235 | 05cd934d | René Nussbaumer | program = os.path.basename(sys.argv[0]) |
236 | 05cd934d | René Nussbaumer | |
237 | d3b18b8e | René Nussbaumer | parser = optparse.OptionParser(usage=("%prog [--debug|--verbose] [--force]" |
238 | d3b18b8e | René Nussbaumer | " <node> <node...>"), prog=program) |
239 | 05cd934d | René Nussbaumer | parser.add_option(cli.DEBUG_OPT) |
240 | 05cd934d | René Nussbaumer | parser.add_option(cli.VERBOSE_OPT) |
241 | 310a8944 | René Nussbaumer | parser.add_option(cli.NOSSH_KEYCHECK_OPT) |
242 | 7a6a27af | Iustin Pop | default_key = ssh.GetUserFiles(constants.GANETI_RUNAS)[0] |
243 | 7a6a27af | Iustin Pop | parser.add_option(optparse.Option("-f", dest="private_key", |
244 | 7a6a27af | Iustin Pop | default=default_key, |
245 | 7a6a27af | Iustin Pop | help="The private key to (try to) use for" |
246 | 7a6a27af | Iustin Pop | "authentication ")) |
247 | 7a6a27af | Iustin Pop | parser.add_option(optparse.Option("--key-type", dest="key_type", |
248 | 7a6a27af | Iustin Pop | choices=("rsa", "dsa"), default="dsa", |
249 | 7a6a27af | Iustin Pop | help="The private key type (rsa or dsa)")) |
250 | d3b18b8e | René Nussbaumer | parser.add_option(optparse.Option("-j", "--force-join", dest="force_join", |
251 | d3b18b8e | René Nussbaumer | action="store_true", default=False, |
252 | d3b18b8e | René Nussbaumer | help="Force the join of the host")) |
253 | 05cd934d | René Nussbaumer | |
254 | 05cd934d | René Nussbaumer | (options, args) = parser.parse_args() |
255 | 05cd934d | René Nussbaumer | |
256 | f1bebf4c | Iustin Pop | if not args: |
257 | f1bebf4c | Iustin Pop | parser.print_help() |
258 | f1bebf4c | Iustin Pop | sys.exit(constants.EXIT_FAILURE) |
259 | f1bebf4c | Iustin Pop | |
260 | 05cd934d | René Nussbaumer | return (options, args) |
261 | 05cd934d | René Nussbaumer | |
262 | 05cd934d | René Nussbaumer | |
263 | 05cd934d | René Nussbaumer | def SetupLogging(options): |
264 | 05cd934d | René Nussbaumer | """Sets up the logging. |
265 | 05cd934d | René Nussbaumer | |
266 | 05cd934d | René Nussbaumer | @param options: Parsed options |
267 | 05cd934d | René Nussbaumer | |
268 | 05cd934d | René Nussbaumer | """ |
269 | 05cd934d | René Nussbaumer | fmt = "%(asctime)s: %(threadName)s " |
270 | 05cd934d | René Nussbaumer | if options.debug or options.verbose: |
271 | 05cd934d | René Nussbaumer | fmt += "%(levelname)s " |
272 | 05cd934d | René Nussbaumer | fmt += "%(message)s" |
273 | 05cd934d | René Nussbaumer | |
274 | 05cd934d | René Nussbaumer | formatter = logging.Formatter(fmt) |
275 | 05cd934d | René Nussbaumer | |
276 | 05cd934d | René Nussbaumer | file_handler = logging.FileHandler(constants.LOG_SETUP_SSH) |
277 | 05cd934d | René Nussbaumer | stderr_handler = logging.StreamHandler() |
278 | 05cd934d | René Nussbaumer | stderr_handler.setFormatter(formatter) |
279 | 05cd934d | René Nussbaumer | file_handler.setFormatter(formatter) |
280 | 5c654e95 | Iustin Pop | file_handler.setLevel(logging.INFO) |
281 | 05cd934d | René Nussbaumer | |
282 | 05cd934d | René Nussbaumer | if options.debug: |
283 | 5c654e95 | Iustin Pop | stderr_handler.setLevel(logging.DEBUG) |
284 | 05cd934d | René Nussbaumer | elif options.verbose: |
285 | 05cd934d | René Nussbaumer | stderr_handler.setLevel(logging.INFO) |
286 | 05cd934d | René Nussbaumer | else: |
287 | 5c654e95 | Iustin Pop | stderr_handler.setLevel(logging.WARNING) |
288 | 05cd934d | René Nussbaumer | |
289 | 05cd934d | René Nussbaumer | root_logger = logging.getLogger("") |
290 | 3dc66ebc | Iustin Pop | root_logger.setLevel(logging.NOTSET) |
291 | 05cd934d | René Nussbaumer | root_logger.addHandler(stderr_handler) |
292 | 05cd934d | René Nussbaumer | root_logger.addHandler(file_handler) |
293 | 8647a52c | Iustin Pop | |
294 | 8647a52c | Iustin Pop | # This is the paramiko logger instance |
295 | 8647a52c | Iustin Pop | paramiko_logger = logging.getLogger("paramiko") |
296 | 05cd934d | René Nussbaumer | paramiko_logger.addHandler(file_handler) |
297 | 5c654e95 | Iustin Pop | # We don't want to debug Paramiko, so filter anything below warning |
298 | 5c654e95 | Iustin Pop | paramiko_logger.setLevel(logging.WARNING) |
299 | 05cd934d | René Nussbaumer | |
300 | 05cd934d | René Nussbaumer | |
301 | 3dc66ebc | Iustin Pop | def LoadPrivateKeys(options): |
302 | 697a3d61 | Manuel Franceschini | """Load the list of available private keys. |
303 | 05cd934d | René Nussbaumer | |
304 | 3dc66ebc | Iustin Pop | It loads the standard ssh key from disk and then tries to connect to |
305 | 3dc66ebc | Iustin Pop | the ssh agent too. |
306 | 05cd934d | René Nussbaumer | |
307 | 3dc66ebc | Iustin Pop | @rtype: list |
308 | 3dc66ebc | Iustin Pop | @return: a list of C{paramiko.PKey} |
309 | 05cd934d | René Nussbaumer | |
310 | 3dc66ebc | Iustin Pop | """ |
311 | 7a6a27af | Iustin Pop | if options.key_type == "rsa": |
312 | 7a6a27af | Iustin Pop | pkclass = paramiko.RSAKey |
313 | 7a6a27af | Iustin Pop | elif options.key_type == "dsa": |
314 | 7a6a27af | Iustin Pop | pkclass = paramiko.DSSKey |
315 | 7a6a27af | Iustin Pop | else: |
316 | 7a6a27af | Iustin Pop | logging.critical("Unknown key type %s selected (choose either rsa or dsa)", |
317 | 7a6a27af | Iustin Pop | options.key_type) |
318 | 7a6a27af | Iustin Pop | sys.exit(1) |
319 | 7a6a27af | Iustin Pop | |
320 | 7a6a27af | Iustin Pop | try: |
321 | 7a6a27af | Iustin Pop | private_key = pkclass.from_private_key_file(options.private_key) |
322 | 7a6a27af | Iustin Pop | except (paramiko.SSHException, EnvironmentError), err: |
323 | 7a6a27af | Iustin Pop | logging.critical("Can't load private key %s: %s", options.private_key, err) |
324 | 7a6a27af | Iustin Pop | sys.exit(1) |
325 | 7a6a27af | Iustin Pop | |
326 | 3dc66ebc | Iustin Pop | try: |
327 | 3dc66ebc | Iustin Pop | agent = paramiko.Agent() |
328 | 3dc66ebc | Iustin Pop | agent_keys = agent.get_keys() |
329 | 3dc66ebc | Iustin Pop | except paramiko.SSHException, err: |
330 | 3dc66ebc | Iustin Pop | # this will only be seen when the agent is broken/uses invalid |
331 | 3dc66ebc | Iustin Pop | # protocol; for non-existing agent, get_keys() will just return an |
332 | 3dc66ebc | Iustin Pop | # empty tuple |
333 | 3dc66ebc | Iustin Pop | logging.warning("Can't connect to the ssh agent: %s; skipping its use", |
334 | 3dc66ebc | Iustin Pop | err) |
335 | 3dc66ebc | Iustin Pop | agent_keys = [] |
336 | 3dc66ebc | Iustin Pop | |
337 | 3dc66ebc | Iustin Pop | return [private_key] + list(agent_keys) |
338 | 3dc66ebc | Iustin Pop | |
339 | 3dc66ebc | Iustin Pop | |
340 | c4da9eaf | René Nussbaumer | def _FormatFingerprint(fpr): |
341 | c4da9eaf | René Nussbaumer | """Formats a paramiko.PKey.get_fingerprint() human readable. |
342 | c4da9eaf | René Nussbaumer | |
343 | c4da9eaf | René Nussbaumer | @param fpr: The fingerprint to be formatted |
344 | c4da9eaf | René Nussbaumer | @return: A human readable fingerprint |
345 | c4da9eaf | René Nussbaumer | |
346 | c4da9eaf | René Nussbaumer | """ |
347 | c4da9eaf | René Nussbaumer | return ssh.FormatParamikoFingerprint(paramiko.util.hexify(fpr)) |
348 | c4da9eaf | René Nussbaumer | |
349 | c4da9eaf | René Nussbaumer | |
350 | 3dc66ebc | Iustin Pop | def LoginViaKeys(transport, username, keys): |
351 | 3dc66ebc | Iustin Pop | """Try to login on the given transport via a list of keys. |
352 | 3dc66ebc | Iustin Pop | |
353 | 3dc66ebc | Iustin Pop | @param transport: the transport to use |
354 | 3dc66ebc | Iustin Pop | @param username: the username to login as |
355 | 3dc66ebc | Iustin Pop | @type keys: list |
356 | 3dc66ebc | Iustin Pop | @param keys: list of C{paramiko.PKey} to use for authentication |
357 | 3dc66ebc | Iustin Pop | @rtype: boolean |
358 | 3dc66ebc | Iustin Pop | @return: True or False depending on whether the login was |
359 | 3dc66ebc | Iustin Pop | successfull or not |
360 | 3dc66ebc | Iustin Pop | |
361 | 3dc66ebc | Iustin Pop | """ |
362 | 3dc66ebc | Iustin Pop | for private_key in keys: |
363 | 3dc66ebc | Iustin Pop | try: |
364 | 3dc66ebc | Iustin Pop | transport.auth_publickey(username, private_key) |
365 | c4da9eaf | René Nussbaumer | fpr = _FormatFingerprint(private_key.get_fingerprint()) |
366 | 3dc66ebc | Iustin Pop | if isinstance(private_key, paramiko.AgentKey): |
367 | 3dc66ebc | Iustin Pop | logging.debug("Authentication via the ssh-agent key %s", fpr) |
368 | 3dc66ebc | Iustin Pop | else: |
369 | 3dc66ebc | Iustin Pop | logging.debug("Authenticated via public key %s", fpr) |
370 | 3dc66ebc | Iustin Pop | return True |
371 | 3dc66ebc | Iustin Pop | except paramiko.SSHException: |
372 | 3dc66ebc | Iustin Pop | continue |
373 | 3dc66ebc | Iustin Pop | else: |
374 | 3dc66ebc | Iustin Pop | # all keys exhausted |
375 | 3dc66ebc | Iustin Pop | return False |
376 | 3dc66ebc | Iustin Pop | |
377 | 3dc66ebc | Iustin Pop | |
378 | 310a8944 | René Nussbaumer | def LoadKnownHosts(): |
379 | 697a3d61 | Manuel Franceschini | """Load the known hosts. |
380 | 310a8944 | René Nussbaumer | |
381 | 697a3d61 | Manuel Franceschini | @return: paramiko.util.load_host_keys dict |
382 | 310a8944 | René Nussbaumer | |
383 | 310a8944 | René Nussbaumer | """ |
384 | 310a8944 | René Nussbaumer | homedir = utils.GetHomeDir(constants.GANETI_RUNAS) |
385 | 310a8944 | René Nussbaumer | known_hosts = os.path.join(homedir, ".ssh", "known_hosts") |
386 | 310a8944 | René Nussbaumer | |
387 | 310a8944 | René Nussbaumer | try: |
388 | 310a8944 | René Nussbaumer | return paramiko.util.load_host_keys(known_hosts) |
389 | 310a8944 | René Nussbaumer | except EnvironmentError: |
390 | c4da9eaf | René Nussbaumer | # We didn't find the path, silently ignore and return an empty dict |
391 | 310a8944 | René Nussbaumer | return {} |
392 | 310a8944 | René Nussbaumer | |
393 | 310a8944 | René Nussbaumer | |
394 | c4da9eaf | René Nussbaumer | def _VerifyServerKey(transport, host, host_keys): |
395 | c4da9eaf | René Nussbaumer | """Verify the server keys. |
396 | c4da9eaf | René Nussbaumer | |
397 | c4da9eaf | René Nussbaumer | @param transport: A paramiko.transport instance |
398 | c4da9eaf | René Nussbaumer | @param host: Name of the host we verify |
399 | c4da9eaf | René Nussbaumer | @param host_keys: Loaded host keys |
400 | c4da9eaf | René Nussbaumer | @raises HostkeyVerificationError: When the host identify couldn't be verified |
401 | c4da9eaf | René Nussbaumer | |
402 | c4da9eaf | René Nussbaumer | """ |
403 | c4da9eaf | René Nussbaumer | |
404 | c4da9eaf | René Nussbaumer | server_key = transport.get_remote_server_key() |
405 | c4da9eaf | René Nussbaumer | keytype = server_key.get_name() |
406 | c4da9eaf | René Nussbaumer | |
407 | c4da9eaf | René Nussbaumer | our_server_key = host_keys.get(host, {}).get(keytype, None) |
408 | c4da9eaf | René Nussbaumer | if not our_server_key: |
409 | c4da9eaf | René Nussbaumer | hexified_key = _FormatFingerprint(server_key.get_fingerprint()) |
410 | c4da9eaf | René Nussbaumer | msg = ("Unable to verify hostkey of host %s: %s. Do you want to accept" |
411 | c4da9eaf | René Nussbaumer | " it?" % (host, hexified_key)) |
412 | c4da9eaf | René Nussbaumer | |
413 | c4da9eaf | René Nussbaumer | if cli.AskUser(msg): |
414 | c4da9eaf | René Nussbaumer | our_server_key = server_key |
415 | c4da9eaf | René Nussbaumer | |
416 | c4da9eaf | René Nussbaumer | if our_server_key != server_key: |
417 | c4da9eaf | René Nussbaumer | raise HostKeyVerificationError("Unable to verify host identity") |
418 | c4da9eaf | René Nussbaumer | |
419 | c4da9eaf | René Nussbaumer | |
420 | 3dc66ebc | Iustin Pop | def main(): |
421 | 3dc66ebc | Iustin Pop | """Main routine. |
422 | 3dc66ebc | Iustin Pop | |
423 | 3dc66ebc | Iustin Pop | """ |
424 | 3dc66ebc | Iustin Pop | (options, args) = ParseOptions() |
425 | 3dc66ebc | Iustin Pop | |
426 | 3dc66ebc | Iustin Pop | SetupLogging(options) |
427 | 3dc66ebc | Iustin Pop | |
428 | 3dc66ebc | Iustin Pop | all_keys = LoadPrivateKeys(options) |
429 | 3dc66ebc | Iustin Pop | |
430 | 7a6a27af | Iustin Pop | passwd = None |
431 | 7a6a27af | Iustin Pop | username = constants.GANETI_RUNAS |
432 | 7bff16bd | Iustin Pop | ssh_port = netutils.GetDaemonPort("ssh") |
433 | 310a8944 | René Nussbaumer | host_keys = LoadKnownHosts() |
434 | 05cd934d | René Nussbaumer | |
435 | 8647a52c | Iustin Pop | # Below, we need to join() the transport objects, as otherwise the |
436 | 8647a52c | Iustin Pop | # following happens: |
437 | 8647a52c | Iustin Pop | # - the main thread finishes |
438 | 8647a52c | Iustin Pop | # - the atexit functions run (in the main thread), and cause the |
439 | 8647a52c | Iustin Pop | # logging file to be closed |
440 | 8647a52c | Iustin Pop | # - a tiny bit later, the transport thread is finally ending, and |
441 | 8647a52c | Iustin Pop | # wants to log one more message, which fails as the file is closed |
442 | 8647a52c | Iustin Pop | # now |
443 | 8647a52c | Iustin Pop | |
444 | c4da9eaf | René Nussbaumer | success = True |
445 | c4da9eaf | René Nussbaumer | |
446 | 05cd934d | René Nussbaumer | for host in args: |
447 | c4da9eaf | René Nussbaumer | logging.info("Configuring %s", host) |
448 | 310a8944 | René Nussbaumer | |
449 | c4da9eaf | René Nussbaumer | transport = paramiko.Transport((host, ssh_port)) |
450 | 05cd934d | René Nussbaumer | try: |
451 | 05cd934d | René Nussbaumer | try: |
452 | c4da9eaf | René Nussbaumer | transport.start_client() |
453 | c4da9eaf | René Nussbaumer | |
454 | c4da9eaf | René Nussbaumer | if options.ssh_key_check: |
455 | c4da9eaf | René Nussbaumer | _VerifyServerKey(transport, host, host_keys) |
456 | c4da9eaf | René Nussbaumer | |
457 | c4da9eaf | René Nussbaumer | try: |
458 | c4da9eaf | René Nussbaumer | if LoginViaKeys(transport, username, all_keys): |
459 | c4da9eaf | René Nussbaumer | logging.info("Authenticated to %s via public key", host) |
460 | d3b18b8e | René Nussbaumer | else: |
461 | c4da9eaf | René Nussbaumer | if all_keys: |
462 | c4da9eaf | René Nussbaumer | logging.warning("Authentication to %s via public key failed," |
463 | c4da9eaf | René Nussbaumer | " trying password", host) |
464 | c4da9eaf | René Nussbaumer | if passwd is None: |
465 | c4da9eaf | René Nussbaumer | passwd = getpass.getpass(prompt="%s password:" % username) |
466 | c4da9eaf | René Nussbaumer | transport.auth_password(username=username, password=passwd) |
467 | c4da9eaf | René Nussbaumer | logging.info("Authenticated to %s via password", host) |
468 | c4da9eaf | René Nussbaumer | except paramiko.SSHException, err: |
469 | c4da9eaf | René Nussbaumer | raise AuthError("Auth error TODO" % err) |
470 | c4da9eaf | René Nussbaumer | |
471 | c4da9eaf | René Nussbaumer | if not _CheckJoin(transport): |
472 | c4da9eaf | René Nussbaumer | if not options.force_join: |
473 | e389d95b | René Nussbaumer | raise JoinCheckError(("Host %s failed join check; Please verify" |
474 | e389d95b | René Nussbaumer | " that the host was not previously joined" |
475 | e389d95b | René Nussbaumer | " to another cluster and use --force-join" |
476 | e389d95b | René Nussbaumer | " to continue") % host) |
477 | c4da9eaf | René Nussbaumer | |
478 | c4da9eaf | René Nussbaumer | logging.warning("Host %s failed join check, forced to continue", |
479 | c4da9eaf | René Nussbaumer | host) |
480 | c4da9eaf | René Nussbaumer | |
481 | 05cd934d | René Nussbaumer | SetupSSH(transport) |
482 | c4da9eaf | René Nussbaumer | logging.info("%s successfully configured", host) |
483 | c4da9eaf | René Nussbaumer | finally: |
484 | c4da9eaf | René Nussbaumer | transport.close() |
485 | c4da9eaf | René Nussbaumer | # this is needed for compatibility with older Paramiko or Python |
486 | c4da9eaf | René Nussbaumer | # versions |
487 | c4da9eaf | René Nussbaumer | transport.join() |
488 | c4da9eaf | René Nussbaumer | except AuthError, err: |
489 | c4da9eaf | René Nussbaumer | logging.error("Authentication error: %s", err) |
490 | c4da9eaf | René Nussbaumer | success = False |
491 | c4da9eaf | René Nussbaumer | break |
492 | c4da9eaf | René Nussbaumer | except HostKeyVerificationError, err: |
493 | c4da9eaf | René Nussbaumer | logging.error("Host key verification error: %s", err) |
494 | c4da9eaf | René Nussbaumer | success = False |
495 | c4da9eaf | René Nussbaumer | except Exception, err: |
496 | c4da9eaf | René Nussbaumer | logging.exception("During setup of %s: %s", host, err) |
497 | c4da9eaf | René Nussbaumer | success = False |
498 | c4da9eaf | René Nussbaumer | |
499 | c4da9eaf | René Nussbaumer | if success: |
500 | c4da9eaf | René Nussbaumer | sys.exit(constants.EXIT_SUCCESS) |
501 | c4da9eaf | René Nussbaumer | |
502 | c4da9eaf | René Nussbaumer | sys.exit(constants.EXIT_FAILURE) |
503 | 5b27346a | René Nussbaumer | |
504 | 05cd934d | René Nussbaumer | |
505 | 05cd934d | René Nussbaumer | if __name__ == "__main__": |
506 | 05cd934d | René Nussbaumer | main() |