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1 | 05cd934d | René Nussbaumer | #!/usr/bin/python |
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2 | 05cd934d | René Nussbaumer | # |
3 | 05cd934d | René Nussbaumer | |
4 | 05cd934d | René Nussbaumer | # Copyright (C) 2010 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 | c9a4a662 | Manuel Franceschini | # pylint: disable-msg=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 paramiko |
33 | 05cd934d | René Nussbaumer | import os.path |
34 | 05cd934d | René Nussbaumer | import optparse |
35 | 05cd934d | René Nussbaumer | import sys |
36 | 05cd934d | René Nussbaumer | |
37 | 05cd934d | René Nussbaumer | from ganeti import cli |
38 | 05cd934d | René Nussbaumer | from ganeti import constants |
39 | 05cd934d | René Nussbaumer | from ganeti import errors |
40 | 05cd934d | René Nussbaumer | from ganeti import netutils |
41 | d3b18b8e | René Nussbaumer | from ganeti import ssconf |
42 | 05cd934d | René Nussbaumer | from ganeti import ssh |
43 | 05cd934d | René Nussbaumer | from ganeti import utils |
44 | 05cd934d | René Nussbaumer | |
45 | 05cd934d | René Nussbaumer | |
46 | 05cd934d | René Nussbaumer | class RemoteCommandError(errors.GenericError): |
47 | 05cd934d | René Nussbaumer | """Exception if remote command was not successful. |
48 | 05cd934d | René Nussbaumer | |
49 | 05cd934d | René Nussbaumer | """ |
50 | 05cd934d | René Nussbaumer | |
51 | 05cd934d | René Nussbaumer | |
52 | d3b18b8e | René Nussbaumer | class JoinCheckError(errors.GenericError): |
53 | d3b18b8e | René Nussbaumer | """Exception raised if join check fails. |
54 | d3b18b8e | René Nussbaumer | |
55 | d3b18b8e | René Nussbaumer | """ |
56 | d3b18b8e | René Nussbaumer | |
57 | d3b18b8e | René Nussbaumer | |
58 | d3b18b8e | René Nussbaumer | def _CheckJoin(transport): |
59 | d3b18b8e | René Nussbaumer | """Checks if a join is safe or dangerous. |
60 | d3b18b8e | René Nussbaumer | |
61 | d3b18b8e | René Nussbaumer | Note: This function relies on the fact, that all |
62 | d3b18b8e | René Nussbaumer | hosts have the same configuration at compile time of |
63 | d3b18b8e | René Nussbaumer | Ganeti. So that the constants do not mismatch. |
64 | d3b18b8e | René Nussbaumer | |
65 | d3b18b8e | René Nussbaumer | @param transport: The paramiko transport instance |
66 | d3b18b8e | René Nussbaumer | @return: True if the join is safe; False otherwise |
67 | d3b18b8e | René Nussbaumer | |
68 | d3b18b8e | René Nussbaumer | """ |
69 | d3b18b8e | René Nussbaumer | sftp = transport.open_sftp_client() |
70 | d3b18b8e | René Nussbaumer | ss = ssconf.SimpleStore() |
71 | d3b18b8e | René Nussbaumer | ss_cluster_name_path = ss.KeyToFilename(constants.SS_CLUSTER_NAME) |
72 | d3b18b8e | René Nussbaumer | |
73 | d3b18b8e | René Nussbaumer | cluster_files = { |
74 | d3b18b8e | René Nussbaumer | ss_cluster_name_path: utils.ReadFile(ss_cluster_name_path), |
75 | d3b18b8e | René Nussbaumer | constants.NODED_CERT_FILE: utils.ReadFile(constants.NODED_CERT_FILE), |
76 | d3b18b8e | René Nussbaumer | } |
77 | d3b18b8e | René Nussbaumer | |
78 | d3b18b8e | René Nussbaumer | try: |
79 | d3b18b8e | René Nussbaumer | remote_noded_file = _ReadSftpFile(sftp, constants.NODED_CERT_FILE) |
80 | d3b18b8e | René Nussbaumer | except IOError: |
81 | d3b18b8e | René Nussbaumer | # We can just assume that the file doesn't exist as such error reporting |
82 | d3b18b8e | René Nussbaumer | # is lacking from paramiko |
83 | d3b18b8e | René Nussbaumer | # |
84 | d3b18b8e | René Nussbaumer | # We don't have the noded certificate. As without the cert, the |
85 | d3b18b8e | René Nussbaumer | # noded is not running, we are on the safe bet to say that this |
86 | d3b18b8e | René Nussbaumer | # node doesn't belong to a cluster |
87 | d3b18b8e | René Nussbaumer | return True |
88 | d3b18b8e | René Nussbaumer | |
89 | d3b18b8e | René Nussbaumer | try: |
90 | d3b18b8e | René Nussbaumer | remote_cluster_name = _ReadSftpFile(sftp, ss_cluster_name_path) |
91 | d3b18b8e | René Nussbaumer | except IOError: |
92 | d3b18b8e | René Nussbaumer | # This can indicate that a previous join was not successful |
93 | d3b18b8e | René Nussbaumer | # So if the noded cert was found and matches we are fine |
94 | d3b18b8e | René Nussbaumer | return cluster_files[constants.NODED_CERT_FILE] == remote_noded_file |
95 | d3b18b8e | René Nussbaumer | |
96 | d3b18b8e | René Nussbaumer | return (cluster_files[constants.NODED_CERT_FILE] == remote_noded_file and |
97 | d3b18b8e | René Nussbaumer | cluster_files[ss_cluster_name_path] == remote_cluster_name) |
98 | d3b18b8e | René Nussbaumer | |
99 | d3b18b8e | René Nussbaumer | |
100 | 05cd934d | René Nussbaumer | def _RunRemoteCommand(transport, command): |
101 | 05cd934d | René Nussbaumer | """Invokes and wait for the command over SSH. |
102 | 05cd934d | René Nussbaumer | |
103 | 05cd934d | René Nussbaumer | @param transport: The paramiko transport instance |
104 | 05cd934d | René Nussbaumer | @param command: The command to be executed |
105 | 05cd934d | René Nussbaumer | |
106 | 05cd934d | René Nussbaumer | """ |
107 | 05cd934d | René Nussbaumer | chan = transport.open_session() |
108 | 05cd934d | René Nussbaumer | chan.set_combine_stderr(True) |
109 | 05cd934d | René Nussbaumer | output_handler = chan.makefile("r") |
110 | 05cd934d | René Nussbaumer | chan.exec_command(command) |
111 | 05cd934d | René Nussbaumer | |
112 | 05cd934d | René Nussbaumer | result = chan.recv_exit_status() |
113 | 05cd934d | René Nussbaumer | msg = output_handler.read() |
114 | 05cd934d | René Nussbaumer | |
115 | 05cd934d | René Nussbaumer | out_msg = "'%s' exited with status code %s, output %r" % (command, result, |
116 | 05cd934d | René Nussbaumer | msg) |
117 | 05cd934d | René Nussbaumer | |
118 | 05cd934d | René Nussbaumer | # If result is -1 (no exit status provided) we assume it was not successful |
119 | 05cd934d | René Nussbaumer | if result: |
120 | 05cd934d | René Nussbaumer | raise RemoteCommandError(out_msg) |
121 | 05cd934d | René Nussbaumer | |
122 | 05cd934d | René Nussbaumer | if msg: |
123 | 05cd934d | René Nussbaumer | logging.info(out_msg) |
124 | 05cd934d | René Nussbaumer | |
125 | 05cd934d | René Nussbaumer | |
126 | 05cd934d | René Nussbaumer | def _InvokeDaemonUtil(transport, command): |
127 | 05cd934d | René Nussbaumer | """Invokes daemon-util on the remote side. |
128 | 05cd934d | René Nussbaumer | |
129 | 05cd934d | René Nussbaumer | @param transport: The paramiko transport instance |
130 | 05cd934d | René Nussbaumer | @param command: The daemon-util command to be run |
131 | 05cd934d | René Nussbaumer | |
132 | 05cd934d | René Nussbaumer | """ |
133 | 05cd934d | René Nussbaumer | _RunRemoteCommand(transport, "%s %s" % (constants.DAEMON_UTIL, command)) |
134 | 05cd934d | René Nussbaumer | |
135 | 05cd934d | René Nussbaumer | |
136 | d3b18b8e | René Nussbaumer | def _ReadSftpFile(sftp, filename): |
137 | d3b18b8e | René Nussbaumer | """Reads a file over sftp. |
138 | d3b18b8e | René Nussbaumer | |
139 | d3b18b8e | René Nussbaumer | @param sftp: An open paramiko SFTP client |
140 | d3b18b8e | René Nussbaumer | @param filename: The filename of the file to read |
141 | d3b18b8e | René Nussbaumer | @return: The content of the file |
142 | d3b18b8e | René Nussbaumer | |
143 | d3b18b8e | René Nussbaumer | """ |
144 | d3b18b8e | René Nussbaumer | remote_file = sftp.open(filename, "r") |
145 | d3b18b8e | René Nussbaumer | try: |
146 | d3b18b8e | René Nussbaumer | return remote_file.read() |
147 | d3b18b8e | René Nussbaumer | finally: |
148 | d3b18b8e | René Nussbaumer | remote_file.close() |
149 | d3b18b8e | René Nussbaumer | |
150 | d3b18b8e | René Nussbaumer | |
151 | 05cd934d | René Nussbaumer | def _WriteSftpFile(sftp, name, perm, data): |
152 | 05cd934d | René Nussbaumer | """SFTPs data to a remote file. |
153 | 05cd934d | René Nussbaumer | |
154 | 05cd934d | René Nussbaumer | @param sftp: A open paramiko SFTP client |
155 | 05cd934d | René Nussbaumer | @param name: The remote file name |
156 | 05cd934d | René Nussbaumer | @param perm: The remote file permission |
157 | 05cd934d | René Nussbaumer | @param data: The data to write |
158 | 05cd934d | René Nussbaumer | |
159 | 05cd934d | René Nussbaumer | """ |
160 | 05cd934d | René Nussbaumer | remote_file = sftp.open(name, "w") |
161 | 05cd934d | René Nussbaumer | try: |
162 | 05cd934d | René Nussbaumer | sftp.chmod(name, perm) |
163 | 05cd934d | René Nussbaumer | remote_file.write(data) |
164 | 05cd934d | René Nussbaumer | finally: |
165 | 05cd934d | René Nussbaumer | remote_file.close() |
166 | 05cd934d | René Nussbaumer | |
167 | 05cd934d | René Nussbaumer | |
168 | 05cd934d | René Nussbaumer | def SetupSSH(transport): |
169 | 05cd934d | René Nussbaumer | """Sets the SSH up on the other side. |
170 | 05cd934d | René Nussbaumer | |
171 | 05cd934d | René Nussbaumer | @param transport: The paramiko transport instance |
172 | 05cd934d | René Nussbaumer | |
173 | 05cd934d | René Nussbaumer | """ |
174 | 05cd934d | René Nussbaumer | priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS) |
175 | 05cd934d | René Nussbaumer | keyfiles = [ |
176 | 05cd934d | René Nussbaumer | (constants.SSH_HOST_DSA_PRIV, 0600), |
177 | 05cd934d | René Nussbaumer | (constants.SSH_HOST_DSA_PUB, 0644), |
178 | 05cd934d | René Nussbaumer | (constants.SSH_HOST_RSA_PRIV, 0600), |
179 | 05cd934d | René Nussbaumer | (constants.SSH_HOST_RSA_PUB, 0644), |
180 | 05cd934d | René Nussbaumer | (priv_key, 0600), |
181 | 05cd934d | René Nussbaumer | (pub_key, 0644), |
182 | 05cd934d | René Nussbaumer | ] |
183 | 05cd934d | René Nussbaumer | |
184 | 05cd934d | René Nussbaumer | sftp = transport.open_sftp_client() |
185 | 05cd934d | René Nussbaumer | |
186 | 05cd934d | René Nussbaumer | filemap = dict((name, (utils.ReadFile(name), perm)) |
187 | 05cd934d | René Nussbaumer | for (name, perm) in keyfiles) |
188 | 05cd934d | René Nussbaumer | |
189 | 05cd934d | René Nussbaumer | auth_path = os.path.dirname(auth_keys) |
190 | 05cd934d | René Nussbaumer | |
191 | 05cd934d | René Nussbaumer | try: |
192 | 05cd934d | René Nussbaumer | sftp.mkdir(auth_path, 0700) |
193 | 05cd934d | René Nussbaumer | except IOError: |
194 | 05cd934d | René Nussbaumer | # Sadly paramiko doesn't provide errno or similiar |
195 | 05cd934d | René Nussbaumer | # so we can just assume that the path already exists |
196 | 5c654e95 | Iustin Pop | logging.info("Path %s seems already to exist on remote node. Ignoring.", |
197 | 05cd934d | René Nussbaumer | auth_path) |
198 | 05cd934d | René Nussbaumer | |
199 | 05cd934d | René Nussbaumer | for name, (data, perm) in filemap.iteritems(): |
200 | 05cd934d | René Nussbaumer | _WriteSftpFile(sftp, name, perm, data) |
201 | 05cd934d | René Nussbaumer | |
202 | 05cd934d | René Nussbaumer | authorized_keys = sftp.open(auth_keys, "a+") |
203 | 05cd934d | René Nussbaumer | try: |
204 | 634a9a35 | Iustin Pop | # Due to the way SFTPFile and BufferedFile are implemented, |
205 | 634a9a35 | Iustin Pop | # opening in a+ mode and then issuing a read(), readline() or |
206 | 634a9a35 | Iustin Pop | # iterating over the file (which uses read() internally) will see |
207 | 634a9a35 | Iustin Pop | # an empty file, since the paramiko internal file position and the |
208 | 634a9a35 | Iustin Pop | # OS-level file-position are desynchronized; therefore, we issue |
209 | 634a9a35 | Iustin Pop | # an explicit seek to resynchronize these; writes should (note |
210 | 634a9a35 | Iustin Pop | # should) still go to the right place |
211 | 634a9a35 | Iustin Pop | authorized_keys.seek(0, 0) |
212 | 05cd934d | René Nussbaumer | # We don't have to close, as the close happened already in AddAuthorizedKey |
213 | 05cd934d | René Nussbaumer | utils.AddAuthorizedKey(authorized_keys, filemap[pub_key][0]) |
214 | 05cd934d | René Nussbaumer | finally: |
215 | 05cd934d | René Nussbaumer | authorized_keys.close() |
216 | 05cd934d | René Nussbaumer | |
217 | 05cd934d | René Nussbaumer | _InvokeDaemonUtil(transport, "reload-ssh-keys") |
218 | 05cd934d | René Nussbaumer | |
219 | 05cd934d | René Nussbaumer | |
220 | 05cd934d | René Nussbaumer | def ParseOptions(): |
221 | 05cd934d | René Nussbaumer | """Parses options passed to program. |
222 | 05cd934d | René Nussbaumer | |
223 | 05cd934d | René Nussbaumer | """ |
224 | 05cd934d | René Nussbaumer | program = os.path.basename(sys.argv[0]) |
225 | 05cd934d | René Nussbaumer | |
226 | d3b18b8e | René Nussbaumer | parser = optparse.OptionParser(usage=("%prog [--debug|--verbose] [--force]" |
227 | d3b18b8e | René Nussbaumer | " <node> <node...>"), prog=program) |
228 | 05cd934d | René Nussbaumer | parser.add_option(cli.DEBUG_OPT) |
229 | 05cd934d | René Nussbaumer | parser.add_option(cli.VERBOSE_OPT) |
230 | 310a8944 | René Nussbaumer | parser.add_option(cli.NOSSH_KEYCHECK_OPT) |
231 | 7a6a27af | Iustin Pop | default_key = ssh.GetUserFiles(constants.GANETI_RUNAS)[0] |
232 | 7a6a27af | Iustin Pop | parser.add_option(optparse.Option("-f", dest="private_key", |
233 | 7a6a27af | Iustin Pop | default=default_key, |
234 | 7a6a27af | Iustin Pop | help="The private key to (try to) use for" |
235 | 7a6a27af | Iustin Pop | "authentication ")) |
236 | 7a6a27af | Iustin Pop | parser.add_option(optparse.Option("--key-type", dest="key_type", |
237 | 7a6a27af | Iustin Pop | choices=("rsa", "dsa"), default="dsa", |
238 | 7a6a27af | Iustin Pop | help="The private key type (rsa or dsa)")) |
239 | d3b18b8e | René Nussbaumer | parser.add_option(optparse.Option("-j", "--force-join", dest="force_join", |
240 | d3b18b8e | René Nussbaumer | action="store_true", default=False, |
241 | d3b18b8e | René Nussbaumer | help="Force the join of the host")) |
242 | 05cd934d | René Nussbaumer | |
243 | 05cd934d | René Nussbaumer | (options, args) = parser.parse_args() |
244 | 05cd934d | René Nussbaumer | |
245 | 05cd934d | René Nussbaumer | return (options, args) |
246 | 05cd934d | René Nussbaumer | |
247 | 05cd934d | René Nussbaumer | |
248 | 05cd934d | René Nussbaumer | def SetupLogging(options): |
249 | 05cd934d | René Nussbaumer | """Sets up the logging. |
250 | 05cd934d | René Nussbaumer | |
251 | 05cd934d | René Nussbaumer | @param options: Parsed options |
252 | 05cd934d | René Nussbaumer | |
253 | 05cd934d | René Nussbaumer | """ |
254 | 05cd934d | René Nussbaumer | fmt = "%(asctime)s: %(threadName)s " |
255 | 05cd934d | René Nussbaumer | if options.debug or options.verbose: |
256 | 05cd934d | René Nussbaumer | fmt += "%(levelname)s " |
257 | 05cd934d | René Nussbaumer | fmt += "%(message)s" |
258 | 05cd934d | René Nussbaumer | |
259 | 05cd934d | René Nussbaumer | formatter = logging.Formatter(fmt) |
260 | 05cd934d | René Nussbaumer | |
261 | 05cd934d | René Nussbaumer | file_handler = logging.FileHandler(constants.LOG_SETUP_SSH) |
262 | 05cd934d | René Nussbaumer | stderr_handler = logging.StreamHandler() |
263 | 05cd934d | René Nussbaumer | stderr_handler.setFormatter(formatter) |
264 | 05cd934d | René Nussbaumer | file_handler.setFormatter(formatter) |
265 | 5c654e95 | Iustin Pop | file_handler.setLevel(logging.INFO) |
266 | 05cd934d | René Nussbaumer | |
267 | 05cd934d | René Nussbaumer | if options.debug: |
268 | 5c654e95 | Iustin Pop | stderr_handler.setLevel(logging.DEBUG) |
269 | 05cd934d | René Nussbaumer | elif options.verbose: |
270 | 05cd934d | René Nussbaumer | stderr_handler.setLevel(logging.INFO) |
271 | 05cd934d | René Nussbaumer | else: |
272 | 5c654e95 | Iustin Pop | stderr_handler.setLevel(logging.WARNING) |
273 | 05cd934d | René Nussbaumer | |
274 | 05cd934d | René Nussbaumer | root_logger = logging.getLogger("") |
275 | 3dc66ebc | Iustin Pop | root_logger.setLevel(logging.NOTSET) |
276 | 05cd934d | René Nussbaumer | root_logger.addHandler(stderr_handler) |
277 | 05cd934d | René Nussbaumer | root_logger.addHandler(file_handler) |
278 | 8647a52c | Iustin Pop | |
279 | 8647a52c | Iustin Pop | # This is the paramiko logger instance |
280 | 8647a52c | Iustin Pop | paramiko_logger = logging.getLogger("paramiko") |
281 | 05cd934d | René Nussbaumer | paramiko_logger.addHandler(file_handler) |
282 | 5c654e95 | Iustin Pop | # We don't want to debug Paramiko, so filter anything below warning |
283 | 5c654e95 | Iustin Pop | paramiko_logger.setLevel(logging.WARNING) |
284 | 05cd934d | René Nussbaumer | |
285 | 05cd934d | René Nussbaumer | |
286 | 3dc66ebc | Iustin Pop | def LoadPrivateKeys(options): |
287 | 697a3d61 | Manuel Franceschini | """Load the list of available private keys. |
288 | 05cd934d | René Nussbaumer | |
289 | 3dc66ebc | Iustin Pop | It loads the standard ssh key from disk and then tries to connect to |
290 | 3dc66ebc | Iustin Pop | the ssh agent too. |
291 | 05cd934d | René Nussbaumer | |
292 | 3dc66ebc | Iustin Pop | @rtype: list |
293 | 3dc66ebc | Iustin Pop | @return: a list of C{paramiko.PKey} |
294 | 05cd934d | René Nussbaumer | |
295 | 3dc66ebc | Iustin Pop | """ |
296 | 7a6a27af | Iustin Pop | if options.key_type == "rsa": |
297 | 7a6a27af | Iustin Pop | pkclass = paramiko.RSAKey |
298 | 7a6a27af | Iustin Pop | elif options.key_type == "dsa": |
299 | 7a6a27af | Iustin Pop | pkclass = paramiko.DSSKey |
300 | 7a6a27af | Iustin Pop | else: |
301 | 7a6a27af | Iustin Pop | logging.critical("Unknown key type %s selected (choose either rsa or dsa)", |
302 | 7a6a27af | Iustin Pop | options.key_type) |
303 | 7a6a27af | Iustin Pop | sys.exit(1) |
304 | 7a6a27af | Iustin Pop | |
305 | 7a6a27af | Iustin Pop | try: |
306 | 7a6a27af | Iustin Pop | private_key = pkclass.from_private_key_file(options.private_key) |
307 | 7a6a27af | Iustin Pop | except (paramiko.SSHException, EnvironmentError), err: |
308 | 7a6a27af | Iustin Pop | logging.critical("Can't load private key %s: %s", options.private_key, err) |
309 | 7a6a27af | Iustin Pop | sys.exit(1) |
310 | 7a6a27af | Iustin Pop | |
311 | 3dc66ebc | Iustin Pop | try: |
312 | 3dc66ebc | Iustin Pop | agent = paramiko.Agent() |
313 | 3dc66ebc | Iustin Pop | agent_keys = agent.get_keys() |
314 | 3dc66ebc | Iustin Pop | except paramiko.SSHException, err: |
315 | 3dc66ebc | Iustin Pop | # this will only be seen when the agent is broken/uses invalid |
316 | 3dc66ebc | Iustin Pop | # protocol; for non-existing agent, get_keys() will just return an |
317 | 3dc66ebc | Iustin Pop | # empty tuple |
318 | 3dc66ebc | Iustin Pop | logging.warning("Can't connect to the ssh agent: %s; skipping its use", |
319 | 3dc66ebc | Iustin Pop | err) |
320 | 3dc66ebc | Iustin Pop | agent_keys = [] |
321 | 3dc66ebc | Iustin Pop | |
322 | 3dc66ebc | Iustin Pop | return [private_key] + list(agent_keys) |
323 | 3dc66ebc | Iustin Pop | |
324 | 3dc66ebc | Iustin Pop | |
325 | 3dc66ebc | Iustin Pop | def LoginViaKeys(transport, username, keys): |
326 | 3dc66ebc | Iustin Pop | """Try to login on the given transport via a list of keys. |
327 | 3dc66ebc | Iustin Pop | |
328 | 3dc66ebc | Iustin Pop | @param transport: the transport to use |
329 | 3dc66ebc | Iustin Pop | @param username: the username to login as |
330 | 3dc66ebc | Iustin Pop | @type keys: list |
331 | 3dc66ebc | Iustin Pop | @param keys: list of C{paramiko.PKey} to use for authentication |
332 | 3dc66ebc | Iustin Pop | @rtype: boolean |
333 | 3dc66ebc | Iustin Pop | @return: True or False depending on whether the login was |
334 | 3dc66ebc | Iustin Pop | successfull or not |
335 | 3dc66ebc | Iustin Pop | |
336 | 3dc66ebc | Iustin Pop | """ |
337 | 3dc66ebc | Iustin Pop | for private_key in keys: |
338 | 3dc66ebc | Iustin Pop | try: |
339 | 3dc66ebc | Iustin Pop | transport.auth_publickey(username, private_key) |
340 | 3dc66ebc | Iustin Pop | fpr = ":".join("%02x" % ord(i) for i in private_key.get_fingerprint()) |
341 | 3dc66ebc | Iustin Pop | if isinstance(private_key, paramiko.AgentKey): |
342 | 3dc66ebc | Iustin Pop | logging.debug("Authentication via the ssh-agent key %s", fpr) |
343 | 3dc66ebc | Iustin Pop | else: |
344 | 3dc66ebc | Iustin Pop | logging.debug("Authenticated via public key %s", fpr) |
345 | 3dc66ebc | Iustin Pop | return True |
346 | 3dc66ebc | Iustin Pop | except paramiko.SSHException: |
347 | 3dc66ebc | Iustin Pop | continue |
348 | 3dc66ebc | Iustin Pop | else: |
349 | 3dc66ebc | Iustin Pop | # all keys exhausted |
350 | 3dc66ebc | Iustin Pop | return False |
351 | 3dc66ebc | Iustin Pop | |
352 | 3dc66ebc | Iustin Pop | |
353 | 310a8944 | René Nussbaumer | def LoadKnownHosts(): |
354 | 697a3d61 | Manuel Franceschini | """Load the known hosts. |
355 | 310a8944 | René Nussbaumer | |
356 | 697a3d61 | Manuel Franceschini | @return: paramiko.util.load_host_keys dict |
357 | 310a8944 | René Nussbaumer | |
358 | 310a8944 | René Nussbaumer | """ |
359 | 310a8944 | René Nussbaumer | homedir = utils.GetHomeDir(constants.GANETI_RUNAS) |
360 | 310a8944 | René Nussbaumer | known_hosts = os.path.join(homedir, ".ssh", "known_hosts") |
361 | 310a8944 | René Nussbaumer | |
362 | 310a8944 | René Nussbaumer | try: |
363 | 310a8944 | René Nussbaumer | return paramiko.util.load_host_keys(known_hosts) |
364 | 310a8944 | René Nussbaumer | except EnvironmentError: |
365 | 310a8944 | René Nussbaumer | # We didn't found the path, silently ignore and return an empty dict |
366 | 310a8944 | René Nussbaumer | return {} |
367 | 310a8944 | René Nussbaumer | |
368 | 310a8944 | René Nussbaumer | |
369 | 3dc66ebc | Iustin Pop | def main(): |
370 | 3dc66ebc | Iustin Pop | """Main routine. |
371 | 3dc66ebc | Iustin Pop | |
372 | 3dc66ebc | Iustin Pop | """ |
373 | 3dc66ebc | Iustin Pop | (options, args) = ParseOptions() |
374 | 3dc66ebc | Iustin Pop | |
375 | 3dc66ebc | Iustin Pop | SetupLogging(options) |
376 | 3dc66ebc | Iustin Pop | |
377 | 5b27346a | René Nussbaumer | errs = 0 |
378 | 5b27346a | René Nussbaumer | |
379 | 3dc66ebc | Iustin Pop | all_keys = LoadPrivateKeys(options) |
380 | 3dc66ebc | Iustin Pop | |
381 | 7a6a27af | Iustin Pop | passwd = None |
382 | 7a6a27af | Iustin Pop | username = constants.GANETI_RUNAS |
383 | 7bff16bd | Iustin Pop | ssh_port = netutils.GetDaemonPort("ssh") |
384 | 310a8944 | René Nussbaumer | host_keys = LoadKnownHosts() |
385 | 05cd934d | René Nussbaumer | |
386 | 8647a52c | Iustin Pop | # Below, we need to join() the transport objects, as otherwise the |
387 | 8647a52c | Iustin Pop | # following happens: |
388 | 8647a52c | Iustin Pop | # - the main thread finishes |
389 | 8647a52c | Iustin Pop | # - the atexit functions run (in the main thread), and cause the |
390 | 8647a52c | Iustin Pop | # logging file to be closed |
391 | 8647a52c | Iustin Pop | # - a tiny bit later, the transport thread is finally ending, and |
392 | 8647a52c | Iustin Pop | # wants to log one more message, which fails as the file is closed |
393 | 8647a52c | Iustin Pop | # now |
394 | 8647a52c | Iustin Pop | |
395 | 05cd934d | René Nussbaumer | for host in args: |
396 | 7bff16bd | Iustin Pop | transport = paramiko.Transport((host, ssh_port)) |
397 | 7a6a27af | Iustin Pop | transport.start_client() |
398 | 310a8944 | René Nussbaumer | server_key = transport.get_remote_server_key() |
399 | 310a8944 | René Nussbaumer | keytype = server_key.get_name() |
400 | 310a8944 | René Nussbaumer | |
401 | 310a8944 | René Nussbaumer | our_server_key = host_keys.get(host, {}).get(keytype, None) |
402 | 310a8944 | René Nussbaumer | if options.ssh_key_check: |
403 | 310a8944 | René Nussbaumer | if not our_server_key: |
404 | 310a8944 | René Nussbaumer | hexified_key = ssh.FormatParamikoFingerprint( |
405 | f9b87434 | René Nussbaumer | paramiko.util.hexify(server_key.get_fingerprint())) |
406 | 310a8944 | René Nussbaumer | msg = ("Unable to verify hostkey of host %s: %s. Do you want to accept" |
407 | 310a8944 | René Nussbaumer | " it?" % (host, hexified_key)) |
408 | 310a8944 | René Nussbaumer | |
409 | 310a8944 | René Nussbaumer | if cli.AskUser(msg): |
410 | 310a8944 | René Nussbaumer | our_server_key = server_key |
411 | 310a8944 | René Nussbaumer | |
412 | 310a8944 | René Nussbaumer | if our_server_key != server_key: |
413 | 310a8944 | René Nussbaumer | logging.error("Unable to verify identity of host. Aborting") |
414 | 310a8944 | René Nussbaumer | transport.close() |
415 | 310a8944 | René Nussbaumer | transport.join() |
416 | 310a8944 | René Nussbaumer | # TODO: Run over all hosts, fetch the keys and let them verify from the |
417 | 310a8944 | René Nussbaumer | # user beforehand then proceed with actual work later on |
418 | 310a8944 | René Nussbaumer | raise paramiko.SSHException("Unable to verify identity of host") |
419 | 310a8944 | René Nussbaumer | |
420 | 8647a52c | Iustin Pop | try: |
421 | 3dc66ebc | Iustin Pop | if LoginViaKeys(transport, username, all_keys): |
422 | 7a6a27af | Iustin Pop | logging.info("Authenticated to %s via public key", host) |
423 | 3dc66ebc | Iustin Pop | else: |
424 | 7a6a27af | Iustin Pop | logging.warning("Authentication to %s via public key failed, trying" |
425 | 7a6a27af | Iustin Pop | " password", host) |
426 | 7a6a27af | Iustin Pop | if passwd is None: |
427 | 7a6a27af | Iustin Pop | passwd = getpass.getpass(prompt="%s password:" % username) |
428 | 7a6a27af | Iustin Pop | transport.auth_password(username=username, password=passwd) |
429 | 7a6a27af | Iustin Pop | logging.info("Authenticated to %s via password", host) |
430 | 7a6a27af | Iustin Pop | except paramiko.SSHException, err: |
431 | 8647a52c | Iustin Pop | logging.error("Connection or authentication failed to host %s: %s", |
432 | 8647a52c | Iustin Pop | host, err) |
433 | 8647a52c | Iustin Pop | transport.close() |
434 | 8647a52c | Iustin Pop | # this is needed for compatibility with older Paramiko or Python |
435 | 8647a52c | Iustin Pop | # versions |
436 | 8647a52c | Iustin Pop | transport.join() |
437 | 8647a52c | Iustin Pop | continue |
438 | 05cd934d | René Nussbaumer | try: |
439 | 05cd934d | René Nussbaumer | try: |
440 | d3b18b8e | René Nussbaumer | if not _CheckJoin(transport): |
441 | d3b18b8e | René Nussbaumer | if options.force_join: |
442 | d3b18b8e | René Nussbaumer | logging.warning("Host %s failed join check, forced to continue", |
443 | d3b18b8e | René Nussbaumer | host) |
444 | d3b18b8e | René Nussbaumer | else: |
445 | d3b18b8e | René Nussbaumer | raise JoinCheckError("Host %s failed join check" % host) |
446 | 05cd934d | René Nussbaumer | SetupSSH(transport) |
447 | 05cd934d | René Nussbaumer | except errors.GenericError, err: |
448 | 5b27346a | René Nussbaumer | logging.error("While doing setup on host %s an error occurred: %s", |
449 | 8647a52c | Iustin Pop | host, err) |
450 | 5b27346a | René Nussbaumer | errs += 1 |
451 | 05cd934d | René Nussbaumer | finally: |
452 | 05cd934d | René Nussbaumer | transport.close() |
453 | 8647a52c | Iustin Pop | # this is needed for compatibility with older Paramiko or Python |
454 | 8647a52c | Iustin Pop | # versions |
455 | 8647a52c | Iustin Pop | transport.join() |
456 | 05cd934d | René Nussbaumer | |
457 | 5b27346a | René Nussbaumer | if errs > 0: |
458 | 5b27346a | René Nussbaumer | sys.exit(1) |
459 | 5b27346a | René Nussbaumer | |
460 | 05cd934d | René Nussbaumer | |
461 | 05cd934d | René Nussbaumer | if __name__ == "__main__": |
462 | 05cd934d | René Nussbaumer | main() |