4 # Copyright (C) 2006, 2007 Google Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful, but
12 # WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 # General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 """ Ganeti Remote API master script.
32 from ganeti import constants
33 from ganeti import errors
34 from ganeti import http
35 from ganeti import daemon
36 from ganeti import ssconf
37 from ganeti import utils
38 from ganeti import luxi
39 from ganeti import serializer
40 from ganeti.rapi import connector
42 import ganeti.http.auth
43 import ganeti.http.server
46 class RemoteApiRequestContext(object):
47 """Data structure for Remote API requests.
52 self.handler_fn = None
53 self.handler_access = None
56 class JsonErrorRequestExecutor(http.server.HttpServerRequestExecutor):
57 """Custom Request Executor class that formats HTTP errors in JSON.
60 error_content_type = "application/json"
62 def _FormatErrorMessage(self, values):
63 """Formats the body of an error message.
66 @param values: dictionary with keys code, message and explain.
68 @return: the body of the message
71 return serializer.DumpJson(values, indent=True)
74 class RemoteApiHttpServer(http.auth.HttpServerRequestAuthentication,
75 http.server.HttpServer):
76 """REST Request Handler Class.
79 AUTH_REALM = "Ganeti Remote API"
81 def __init__(self, *args, **kwargs):
82 http.server.HttpServer.__init__(self, *args, **kwargs)
83 http.auth.HttpServerRequestAuthentication.__init__(self)
84 self._resmap = connector.Mapper()
87 if os.path.isfile(constants.RAPI_USERS_FILE):
88 self._users = http.auth.ReadPasswordFile(constants.RAPI_USERS_FILE)
92 def _GetRequestContext(self, req):
93 """Returns the context for a request.
95 The context is cached in the req.private variable.
98 if req.private is None:
99 (HandlerClass, items, args) = \
100 self._resmap.getController(req.request_path)
102 ctx = RemoteApiRequestContext()
103 ctx.handler = HandlerClass(items, args, req)
105 method = req.request_method.upper()
107 ctx.handler_fn = getattr(ctx.handler, method)
108 except AttributeError, err:
109 raise http.HttpBadRequest("Method %s is unsupported for path %s" %
110 (method, req.request_path))
112 ctx.handler_access = getattr(ctx.handler, "%s_ACCESS" % method, None)
114 # Require permissions definition (usually in the base class)
115 if ctx.handler_access is None:
116 raise AssertionError("Permissions definition missing")
122 def GetAuthRealm(self, req):
123 """Override the auth realm for queries.
126 ctx = self._GetRequestContext(req)
127 if ctx.handler_access:
128 return self.AUTH_REALM
132 def Authenticate(self, req, username, password):
133 """Checks whether a user can access a resource.
136 ctx = self._GetRequestContext(req)
138 # Check username and password
141 user = self._users.get(username, None)
142 if user and user.password == password:
146 # Unknown user or password wrong
149 if (not ctx.handler_access or
150 set(user.options).intersection(ctx.handler_access)):
155 raise http.HttpForbidden()
157 def HandleRequest(self, req):
158 """Handles a request.
161 ctx = self._GetRequestContext(req)
164 result = ctx.handler_fn()
165 sn = ctx.handler.getSerialNumber()
167 req.response_headers[http.HTTP_ETAG] = str(sn)
168 except luxi.TimeoutError:
169 raise http.HttpGatewayTimeout()
170 except luxi.ProtocolError, err:
171 raise http.HttpBadGateway(str(err))
173 method = req.request_method.upper()
174 logging.exception("Error while handling the %s request", method)
181 """Parse the command line options.
183 @return: (options, args) as from OptionParser.parse_args()
186 parser = optparse.OptionParser(description="Ganeti Remote API",
187 usage="%prog [-d] [-p port]",
188 version="%%prog (ganeti) %s" %
189 constants.RAPI_VERSION)
190 parser.add_option("-d", "--debug", dest="debug",
191 help="Enable some debug messages",
192 default=False, action="store_true")
193 parser.add_option("-p", "--port", dest="port",
194 help="Port to run API (%s default)." %
196 default=constants.RAPI_PORT, type="int")
197 parser.add_option("--no-ssl", dest="ssl",
198 help="Do not secure HTTP protocol with SSL",
199 default=True, action="store_false")
200 parser.add_option("-K", "--ssl-key", dest="ssl_key",
202 default=constants.RAPI_CERT_FILE, type="string")
203 parser.add_option("-C", "--ssl-cert", dest="ssl_cert",
204 help="SSL certificate",
205 default=constants.RAPI_CERT_FILE, type="string")
206 parser.add_option("-f", "--foreground", dest="fork",
207 help="Don't detach from the current terminal",
208 default=True, action="store_false")
209 parser.add_option("-b", "--bind", dest="bind_address",
211 default="", metavar="ADDRESS")
213 options, args = parser.parse_args()
216 print >> sys.stderr, "Usage: %s [-d] [-p port]" % sys.argv[0]
217 sys.exit(constants.EXIT_FAILURE)
219 if options.ssl and not (options.ssl_cert and options.ssl_key):
220 print >> sys.stderr, ("For secure mode please provide "
221 "--ssl-key and --ssl-cert arguments")
222 sys.exit(constants.EXIT_FAILURE)
231 options, args = ParseOptions()
237 # Read SSL certificate
239 ssl_params = http.HttpSslParams(ssl_key_path=options.ssl_key,
240 ssl_cert_path=options.ssl_cert)
241 except Exception, err:
242 sys.stderr.write("Can't load the SSL certificate/key: %s\n" % (err,))
243 sys.exit(constants.EXIT_FAILURE)
247 ssconf.CheckMaster(options.debug)
250 utils.Daemonize(logfile=constants.LOG_RAPISERVER)
252 utils.SetupLogging(constants.LOG_RAPISERVER, debug=options.debug,
253 stderr_logging=not options.fork)
255 utils.WritePidFile(constants.RAPI_PID)
257 mainloop = daemon.Mainloop()
258 server = RemoteApiHttpServer(mainloop, options.bind_address, options.port,
259 ssl_params=ssl_params, ssl_verify_peer=False,
260 request_executor_class=
261 JsonErrorRequestExecutor)
268 utils.RemovePidFile(constants.RAPI_PID)
271 if __name__ == '__main__':