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)
180 def CheckRapi(options, args):
181 """Initial checks whether to run or exit with a failure.
185 print >> sys.stderr, "Usage: %s [-f] [-d] [-p port] [-b ADDRESS]" % \
187 sys.exit(constants.EXIT_FAILURE)
189 ssconf.CheckMaster(options.debug)
192 def ExecRapi(options, args):
193 """Main remote API function, executed with the PID file held.
196 # Read SSL certificate
198 ssl_params = http.HttpSslParams(ssl_key_path=options.ssl_key,
199 ssl_cert_path=options.ssl_cert)
203 mainloop = daemon.Mainloop()
204 server = RemoteApiHttpServer(mainloop, options.bind_address, options.port,
205 ssl_params=ssl_params, ssl_verify_peer=False,
206 request_executor_class=JsonErrorRequestExecutor)
218 parser = optparse.OptionParser(description="Ganeti Remote API",
219 usage="%prog [-f] [-d] [-p port] [-b ADDRESS]",
220 version="%%prog (ganeti) %s" % constants.RAPI_VERSION)
222 dirs = [(val, constants.RUN_DIRS_MODE) for val in constants.SUB_RUN_DIRS]
223 dirs.append((constants.LOG_OS_DIR, 0750))
224 daemon.GenericMain(constants.RAPI, parser, dirs, CheckRapi, ExecRapi)
227 if __name__ == "__main__":