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+      #
+      #
       # Copyright (C) 2010, 2011 Google Inc.
       # Copyright (C) 2013, GRNET S.A.
+      #
       # 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 2 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, write to the Free Software
       # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
       # 02110-1301, USA.
       """Ganeti RAPI client."""
       # No Ganeti-specific modules should be imported. The RAPI client is supposed to
       # be standalone.
       import requests
       import logging
       import simplejson
       import time
       GANETI_RAPI_PORT = 5080
       GANETI_RAPI_VERSION = 2
       HTTP_DELETE = "DELETE"
       HTTP_GET = "GET"
       HTTP_PUT = "PUT"
       HTTP_POST = "POST"
       HTTP_OK = 200
       HTTP_NOT_FOUND = 404
       HTTP_APP_JSON = "application/json"
       REPLACE_DISK_PRI = "replace_on_primary"
       REPLACE_DISK_SECONDARY = "replace_on_secondary"
       REPLACE_DISK_CHG = "replace_new_secondary"
       REPLACE_DISK_AUTO = "replace_auto"
       NODE_EVAC_PRI = "primary-only"
       NODE_EVAC_SEC = "secondary-only"
       NODE_EVAC_ALL = "all"
       NODE_ROLE_DRAINED = "drained"
       NODE_ROLE_MASTER_CANDIATE = "master-candidate"
       NODE_ROLE_MASTER = "master"
       NODE_ROLE_OFFLINE = "offline"
       NODE_ROLE_REGULAR = "regular"
       JOB_STATUS_QUEUED = "queued"
       JOB_STATUS_WAITING = "waiting"
       JOB_STATUS_CANCELING = "canceling"
       JOB_STATUS_RUNNING = "running"
       JOB_STATUS_CANCELED = "canceled"
       JOB_STATUS_SUCCESS = "success"
       JOB_STATUS_ERROR = "error"
       JOB_STATUS_FINALIZED = frozenset([
         JOB_STATUS_CANCELED,
         JOB_STATUS_SUCCESS,
         JOB_STATUS_ERROR,
         ])
       JOB_STATUS_ALL = frozenset([
         JOB_STATUS_QUEUED,
         JOB_STATUS_WAITING,
         JOB_STATUS_CANCELING,
         JOB_STATUS_RUNNING,
         ]) | JOB_STATUS_FINALIZED
       # Legacy name
       JOB_STATUS_WAITLOCK = JOB_STATUS_WAITING
       # Internal constants
       _REQ_DATA_VERSION_FIELD = "__version__"
       _QPARAM_DRY_RUN = "dry-run"
       _QPARAM_FORCE = "force"
       # Feature strings
       INST_CREATE_REQV1 = "instance-create-reqv1"
       INST_REINSTALL_REQV1 = "instance-reinstall-reqv1"
       NODE_MIGRATE_REQV1 = "node-migrate-reqv1"
       NODE_EVAC_RES1 = "node-evac-res1"
       # Old feature constant names in case they're references by users of this module
       _INST_CREATE_REQV1 = INST_CREATE_REQV1
       _INST_REINSTALL_REQV1 = INST_REINSTALL_REQV1
       _NODE_MIGRATE_REQV1 = NODE_MIGRATE_REQV1
       _NODE_EVAC_RES1 = NODE_EVAC_RES1
       class Error(Exception):
         """Base error class for this module.
         """
         pass
       class GanetiApiError(Error):
         """Generic error raised from Ganeti API.
         """
         def __init__(self, msg, code=None):
           Error.__init__(self, msg)
           self.code = code
       class CertificateError(GanetiApiError):
         """Raised when a problem is found with the SSL certificate.
         """
         pass
       def _AppendIf(container, condition, value):
         """Appends to a list if a condition evaluates to truth.
         """
         if condition:
           container.append(value)
         return condition
       def _AppendDryRunIf(container, condition):
         """Appends a "dry-run" parameter if a condition evaluates to truth.
         """
         return _AppendIf(container, condition, (_QPARAM_DRY_RUN, 1))
       def _AppendForceIf(container, condition):
         """Appends a "force" parameter if a condition evaluates to truth.
         """
         return _AppendIf(container, condition, (_QPARAM_FORCE, 1))
       def _SetItemIf(container, condition, item, value):
         """Sets an item if a condition evaluates to truth.
         """
         if condition:
           container[item] = value
         return condition
       class GanetiRapiClient(object): # pylint: disable=R0904
         """Ganeti RAPI client.
         """
         USER_AGENT = "Ganeti RAPI Client"
         _json_encoder = simplejson.JSONEncoder(sort_keys=True)
         def __init__(self, host, port=GANETI_RAPI_PORT,
                      username=None, password=None, logger=logging):
           """Initializes this class.
           @type host: string
           @param host: the ganeti cluster master to interact with
           @type port: int
           @param port: the port on which the RAPI is running (default is 5080)
           @type username: string
           @param username: the username to connect with
           @type password: string
           @param password: the password to connect with
           @param logger: Logging object
           """
           self._logger = logger
           self._base_url = "https://%s:%s" % (host, port)
           if username is not None:
             if password is None:
               raise Error("Password not specified")
           elif password:
             raise Error("Specified password without username")
           self._auth = (username, password)
         def _SendRequest(self, method, path, query, content):
           """Sends an HTTP request.
           This constructs a full URL, encodes and decodes HTTP bodies, and
           handles invalid responses in a pythonic way.
           @type method: string
           @param method: HTTP method to use
           @type path: string
           @param path: HTTP URL path
           @type query: list of two-tuples
           @param query: query arguments to pass to urllib.urlencode
           @type content: str or None
           @param content: HTTP body content
           @rtype: str
           @return: JSON-Decoded response
           @raises CertificateError: If an invalid SSL certificate is found
           @raises GanetiApiError: If an invalid response is returned
           """
           assert path.startswith("/")
           url = "%s%s" % (self._base_url, path)
           headers = {}
           if content is not None:
             encoded_content = self._json_encoder.encode(content)
             headers = {"content-type": HTTP_APP_JSON,
                        "accept": HTTP_APP_JSON}
           else:
             encoded_content = ""
           if query is not None:
               query = dict(query)
           self._logger.debug("Sending request %s %s (query=%r) (content=%r)",
                              method, url, query, encoded_content)
           req_method = getattr(requests, method.lower())
           r = req_method(url, auth=self._auth, headers=headers, params=query,
                          data=encoded_content, verify=False)
           http_code = r.status_code
           if r.content is not None:
               response_content = simplejson.loads(r.content)
           else:
               response_content = None
           if http_code != HTTP_OK:
             if isinstance(response_content, dict):
               msg = ("%s %s: %s" %
                      (response_content["code"],
                       response_content["message"],
                       response_content["explain"]))
             else:
               msg = str(response_content)
             raise GanetiApiError(msg, code=http_code)
           return response_content
         def GetVersion(self):
           """Gets the Remote API version running on the cluster.
           @rtype: int
           @return: Ganeti Remote API version
           """
           return self._SendRequest(HTTP_GET, "/version", None, None)
         def GetFeatures(self):
           """Gets the list of optional features supported by RAPI server.
           @rtype: list
           @return: List of optional features
           """
           try:
             return self._SendRequest(HTTP_GET, "/%s/features" % GANETI_RAPI_VERSION,
                                      None, None)
           except GanetiApiError, err:
             # Older RAPI servers don't support this resource
             if err.code == HTTP_NOT_FOUND:
               return []
             raise
         def GetOperatingSystems(self):
           """Gets the Operating Systems running in the Ganeti cluster.
           @rtype: list of str
           @return: operating systems
           """
           return self._SendRequest(HTTP_GET, "/%s/os" % GANETI_RAPI_VERSION,
                                    None, None)
         def GetInfo(self):
           """Gets info about the cluster.
           @rtype: dict
           @return: information about the cluster
           """
           return self._SendRequest(HTTP_GET, "/%s/info" % GANETI_RAPI_VERSION,
                                    None, None)
         def RedistributeConfig(self):
           """Tells the cluster to redistribute its configuration files.
           @rtype: string
           @return: job id
           """
           return self._SendRequest(HTTP_PUT,
                                    "/%s/redistribute-config" % GANETI_RAPI_VERSION,
                                    None, None)
         def ModifyCluster(self, **kwargs):
           """Modifies cluster parameters.
           More details for parameters can be found in the RAPI documentation.
           @rtype: string
           @return: job id
           """
           body = kwargs
           return self._SendRequest(HTTP_PUT,
                                    "/%s/modify" % GANETI_RAPI_VERSION, None, body)
         def GetClusterTags(self):
           """Gets the cluster tags.
           @rtype: list of str
           @return: cluster tags
           """
           return self._SendRequest(HTTP_GET, "/%s/tags" % GANETI_RAPI_VERSION,
                                    None, None)
         def AddClusterTags(self, tags, dry_run=False):
           """Adds tags to the cluster.
           @type tags: list of str
           @param tags: tags to add to the cluster
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_PUT, "/%s/tags" % GANETI_RAPI_VERSION,
                                    query, None)
         def DeleteClusterTags(self, tags, dry_run=False):
           """Deletes tags from the cluster.
           @type tags: list of str
           @param tags: tags to delete
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE, "/%s/tags" % GANETI_RAPI_VERSION,
                                    query, None)
         def GetInstances(self, bulk=False):
           """Gets information about instances on the cluster.
           @type bulk: bool
           @param bulk: whether to return all information about all instances
           @rtype: list of dict or list of str
           @return: if bulk is True, info about the instances, else a list of instances
           """
           query = []
           _AppendIf(query, bulk, ("bulk", 1))
           instances = self._SendRequest(HTTP_GET,
                                         "/%s/instances" % GANETI_RAPI_VERSION,
                                         query, None)
           if bulk:
             return instances
           else:
             return [i["id"] for i in instances]
         def GetInstance(self, instance):
           """Gets information about an instance.
           @type instance: str
           @param instance: instance whose info to return
           @rtype: dict
           @return: info about the instance
           """
           return self._SendRequest(HTTP_GET,
                                    ("/%s/instances/%s" %
                                     (GANETI_RAPI_VERSION, instance)), None, None)
         def GetInstanceInfo(self, instance, static=None):
           """Gets information about an instance.
           @type instance: string
           @param instance: Instance name
           @rtype: string
           @return: Job ID
           """
           if static is not None:
             query = [("static", static)]
           else:
             query = None
           return self._SendRequest(HTTP_GET,
                                    ("/%s/instances/%s/info" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def CreateInstance(self, mode, name, disk_template, disks, nics,
                            **kwargs):
           """Creates a new instance.
           More details for parameters can be found in the RAPI documentation.
           @type mode: string
           @param mode: Instance creation mode
           @type name: string
           @param name: Hostname of the instance to create
           @type disk_template: string
           @param disk_template: Disk template for instance (e.g. plain, diskless,
                                 file, or drbd)
           @type disks: list of dicts
           @param disks: List of disk definitions
           @type nics: list of dicts
           @param nics: List of NIC definitions
           @type dry_run: bool
           @keyword dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, kwargs.get("dry_run"))
           if _INST_CREATE_REQV1 in self.GetFeatures():
             # All required fields for request data version 1
             body = {
               _REQ_DATA_VERSION_FIELD: 1,
               "mode": mode,
               "name": name,
               "disk_template": disk_template,
               "disks": disks,
               "nics": nics,
+              }
             conflicts = set(kwargs.iterkeys()) & set(body.iterkeys())
             if conflicts:
               raise GanetiApiError("Required fields can not be specified as"
                                    " keywords: %s" % ", ".join(conflicts))
             body.update((key, value) for key, value in kwargs.iteritems()
                         if key != "dry_run")
           else:
             raise GanetiApiError("Server does not support new-style (version 1)"
                                  " instance creation requests")
           return self._SendRequest(HTTP_POST, "/%s/instances" % GANETI_RAPI_VERSION,
                                    query, body)
         def DeleteInstance(self, instance, dry_run=False):
           """Deletes an instance.
           @type instance: str
           @param instance: the instance to delete
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE,
                                    ("/%s/instances/%s" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def ModifyInstance(self, instance, **kwargs):
           """Modifies an instance.
           More details for parameters can be found in the RAPI documentation.
           @type instance: string
           @param instance: Instance name
           @rtype: string
           @return: job id
           """
           body = kwargs
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/modify" %
                                     (GANETI_RAPI_VERSION, instance)), None, body)
         def ActivateInstanceDisks(self, instance, ignore_size=None):
           """Activates an instance's disks.
           @type instance: string
           @param instance: Instance name
           @type ignore_size: bool
           @param ignore_size: Whether to ignore recorded size
           @rtype: string
           @return: job id
           """
           query = []
           _AppendIf(query, ignore_size, ("ignore_size", 1))
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/activate-disks" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def DeactivateInstanceDisks(self, instance):
           """Deactivates an instance's disks.
           @type instance: string
           @param instance: Instance name
           @rtype: string
           @return: job id
           """
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/deactivate-disks" %
                                     (GANETI_RAPI_VERSION, instance)), None, None)
         def RecreateInstanceDisks(self, instance, disks=None, nodes=None):
           """Recreate an instance's disks.
           @type instance: string
           @param instance: Instance name
           @type disks: list of int
           @param disks: List of disk indexes
           @type nodes: list of string
           @param nodes: New instance nodes, if relocation is desired
           @rtype: string
           @return: job id
           """
           body = {}
           _SetItemIf(body, disks is not None, "disks", disks)
           _SetItemIf(body, nodes is not None, "nodes", nodes)
           return self._SendRequest(HTTP_POST,
                                    ("/%s/instances/%s/recreate-disks" %
                                     (GANETI_RAPI_VERSION, instance)), None, body)
         def GrowInstanceDisk(self, instance, disk, amount, wait_for_sync=None):
           """Grows a disk of an instance.
           More details for parameters can be found in the RAPI documentation.
           @type instance: string
           @param instance: Instance name
           @type disk: integer
           @param disk: Disk index
           @type amount: integer
           @param amount: Grow disk by this amount (MiB)
           @type wait_for_sync: bool
           @param wait_for_sync: Wait for disk to synchronize
           @rtype: string
           @return: job id
           """
           body = {
             "amount": amount,
+            }
           _SetItemIf(body, wait_for_sync is not None, "wait_for_sync", wait_for_sync)
           return self._SendRequest(HTTP_POST,
                                    ("/%s/instances/%s/disk/%s/grow" %
                                     (GANETI_RAPI_VERSION, instance, disk)),
                                    None, body)
         def GetInstanceTags(self, instance):
           """Gets tags for an instance.
           @type instance: str
           @param instance: instance whose tags to return
           @rtype: list of str
           @return: tags for the instance
           """
           return self._SendRequest(HTTP_GET,
                                    ("/%s/instances/%s/tags" %
                                     (GANETI_RAPI_VERSION, instance)), None, None)
         def AddInstanceTags(self, instance, tags, dry_run=False):
           """Adds tags to an instance.
           @type instance: str
           @param instance: instance to add tags to
           @type tags: list of str
           @param tags: tags to add to the instance
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/tags" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def DeleteInstanceTags(self, instance, tags, dry_run=False):
           """Deletes tags from an instance.
           @type instance: str
           @param instance: instance to delete tags from
           @type tags: list of str
           @param tags: tags to delete
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE,
                                    ("/%s/instances/%s/tags" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def RebootInstance(self, instance, reboot_type=None, ignore_secondaries=None,
                            dry_run=False):
           """Reboots an instance.
           @type instance: str
           @param instance: instance to rebot
           @type reboot_type: str
           @param reboot_type: one of: hard, soft, full
           @type ignore_secondaries: bool
           @param ignore_secondaries: if True, ignores errors for the secondary node
               while re-assembling disks (in hard-reboot mode only)
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           _AppendIf(query, reboot_type, ("type", reboot_type))
           _AppendIf(query, ignore_secondaries is not None,
                     ("ignore_secondaries", ignore_secondaries))
           return self._SendRequest(HTTP_POST,
                                    ("/%s/instances/%s/reboot" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def ShutdownInstance(self, instance, dry_run=False, no_remember=False):
           """Shuts down an instance.
           @type instance: str
           @param instance: the instance to shut down
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @type no_remember: bool
           @param no_remember: if true, will not record the state change
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           _AppendIf(query, no_remember, ("no-remember", 1))
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/shutdown" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def StartupInstance(self, instance, dry_run=False, no_remember=False):
           """Starts up an instance.
           @type instance: str
           @param instance: the instance to start up
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @type no_remember: bool
           @param no_remember: if true, will not record the state change
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           _AppendIf(query, no_remember, ("no-remember", 1))
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/startup" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def ReinstallInstance(self, instance, os=None, no_startup=False,
                               osparams=None):
           """Reinstalls an instance.
           @type instance: str
           @param instance: The instance to reinstall
           @type os: str or None
           @param os: The operating system to reinstall. If None, the instance's
               current operating system will be installed again
           @type no_startup: bool
           @param no_startup: Whether to start the instance automatically
           @rtype: string
           @return: job id
           """
           if _INST_REINSTALL_REQV1 in self.GetFeatures():
             body = {
               "start": not no_startup,
+              }
             _SetItemIf(body, os is not None, "os", os)
             _SetItemIf(body, osparams is not None, "osparams", osparams)
             return self._SendRequest(HTTP_POST,
                                      ("/%s/instances/%s/reinstall" %
                                       (GANETI_RAPI_VERSION, instance)), None, body)
           # Use old request format
           if osparams:
             raise GanetiApiError("Server does not support specifying OS parameters"
                                  " for instance reinstallation")
           query = []
           _AppendIf(query, os, ("os", os))
           _AppendIf(query, no_startup, ("nostartup", 1))
           return self._SendRequest(HTTP_POST,
                                    ("/%s/instances/%s/reinstall" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def ReplaceInstanceDisks(self, instance, disks=None, mode=REPLACE_DISK_AUTO,
                                  remote_node=None, iallocator=None):
           """Replaces disks on an instance.
           @type instance: str
           @param instance: instance whose disks to replace
           @type disks: list of ints
           @param disks: Indexes of disks to replace
           @type mode: str
           @param mode: replacement mode to use (defaults to replace_auto)
           @type remote_node: str or None
           @param remote_node: new secondary node to use (for use with
               replace_new_secondary mode)
           @type iallocator: str or None
           @param iallocator: instance allocator plugin to use (for use with
                              replace_auto mode)
           @rtype: string
           @return: job id
           """
           query = [
             ("mode", mode),
+            ]
           # TODO: Convert to body parameters
           if disks is not None:
             _AppendIf(query, True,
                       ("disks", ",".join(str(idx) for idx in disks)))
           _AppendIf(query, remote_node is not None, ("remote_node", remote_node))
           _AppendIf(query, iallocator is not None, ("iallocator", iallocator))
           return self._SendRequest(HTTP_POST,
                                    ("/%s/instances/%s/replace-disks" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def PrepareExport(self, instance, mode):
           """Prepares an instance for an export.
           @type instance: string
           @param instance: Instance name
           @type mode: string
           @param mode: Export mode
           @rtype: string
           @return: Job ID
           """
           query = [("mode", mode)]
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/prepare-export" %
                                     (GANETI_RAPI_VERSION, instance)), query, None)
         def ExportInstance(self, instance, mode, destination, shutdown=None,
                            remove_instance=None,
                            x509_key_name=None, destination_x509_ca=None):
           """Exports an instance.
           @type instance: string
           @param instance: Instance name
           @type mode: string
           @param mode: Export mode
           @rtype: string
           @return: Job ID
           """
           body = {
             "destination": destination,
             "mode": mode,
+            }
           _SetItemIf(body, shutdown is not None, "shutdown", shutdown)
           _SetItemIf(body, remove_instance is not None,
                      "remove_instance", remove_instance)
           _SetItemIf(body, x509_key_name is not None, "x509_key_name", x509_key_name)
           _SetItemIf(body, destination_x509_ca is not None,
                      "destination_x509_ca", destination_x509_ca)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/export" %
                                     (GANETI_RAPI_VERSION, instance)), None, body)
         def MigrateInstance(self, instance, mode=None, cleanup=None):
           """Migrates an instance.
           @type instance: string
           @param instance: Instance name
           @type mode: string
           @param mode: Migration mode
           @type cleanup: bool
           @param cleanup: Whether to clean up a previously failed migration
           @rtype: string
           @return: job id
           """
           body = {}
           _SetItemIf(body, mode is not None, "mode", mode)
           _SetItemIf(body, cleanup is not None, "cleanup", cleanup)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/migrate" %
                                     (GANETI_RAPI_VERSION, instance)), None, body)
         def FailoverInstance(self, instance, iallocator=None,
                              ignore_consistency=None, target_node=None):
           """Does a failover of an instance.
           @type instance: string
           @param instance: Instance name
           @type iallocator: string
           @param iallocator: Iallocator for deciding the target node for
             shared-storage instances
           @type ignore_consistency: bool
           @param ignore_consistency: Whether to ignore disk consistency
           @type target_node: string
           @param target_node: Target node for shared-storage instances
           @rtype: string
           @return: job id
           """
           body = {}
           _SetItemIf(body, iallocator is not None, "iallocator", iallocator)
           _SetItemIf(body, ignore_consistency is not None,
                      "ignore_consistency", ignore_consistency)
           _SetItemIf(body, target_node is not None, "target_node", target_node)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/failover" %
                                     (GANETI_RAPI_VERSION, instance)), None, body)
         def RenameInstance(self, instance, new_name, ip_check=None, name_check=None):
           """Changes the name of an instance.
           @type instance: string
           @param instance: Instance name
           @type new_name: string
           @param new_name: New instance name
           @type ip_check: bool
           @param ip_check: Whether to ensure instance's IP address is inactive
           @type name_check: bool
           @param name_check: Whether to ensure instance's name is resolvable
           @rtype: string
           @return: job id
           """
           body = {
             "new_name": new_name,
+            }
           _SetItemIf(body, ip_check is not None, "ip_check", ip_check)
           _SetItemIf(body, name_check is not None, "name_check", name_check)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/instances/%s/rename" %
                                     (GANETI_RAPI_VERSION, instance)), None, body)
         def GetInstanceConsole(self, instance):
           """Request information for connecting to instance's console.
           @type instance: string
           @param instance: Instance name
           @rtype: dict
           @return: dictionary containing information about instance's console
           """
           return self._SendRequest(HTTP_GET,
                                    ("/%s/instances/%s/console" %
                                     (GANETI_RAPI_VERSION, instance)), None, None)
         def GetJobs(self, bulk=False):
           """Gets all jobs for the cluster.
           @rtype: list of int
           @return: job ids for the cluster
           """
           query = []
           _AppendIf(query, bulk, ("bulk", 1))
           jobs = self._SendRequest(HTTP_GET, "/%s/jobs" % GANETI_RAPI_VERSION,
                                    query, None)
           if bulk:
               return jobs
           else:
               return [int(j["id"]) for j in jobs]
         def GetJobStatus(self, job_id):
           """Gets the status of a job.
           @type job_id: string
           @param job_id: job id whose status to query
           @rtype: dict
           @return: job status
           """
           return self._SendRequest(HTTP_GET,
                                    "/%s/jobs/%s" % (GANETI_RAPI_VERSION, job_id),
                                    None, None)
         def WaitForJobCompletion(self, job_id, period=5, retries=-1):
           """Polls cluster for job status until completion.
           Completion is defined as any of the following states listed in
           L{JOB_STATUS_FINALIZED}.
           @type job_id: string
           @param job_id: job id to watch
           @type period: int
           @param period: how often to poll for status (optional, default 5s)
           @type retries: int
           @param retries: how many time to poll before giving up
                           (optional, default -1 means unlimited)
           @rtype: bool
           @return: C{True} if job succeeded or C{False} if failed/status timeout
           @deprecated: It is recommended to use L{WaitForJobChange} wherever
             possible; L{WaitForJobChange} returns immediately after a job changed and
             does not use polling
           """
           while retries != 0:
             job_result = self.GetJobStatus(job_id)
             if job_result and job_result["status"] == JOB_STATUS_SUCCESS:
               return True
             elif not job_result or job_result["status"] in JOB_STATUS_FINALIZED:
               return False
             if period:
               time.sleep(period)
             if retries > 0:
               retries -= 1
           return False
         def WaitForJobChange(self, job_id, fields, prev_job_info, prev_log_serial):
           """Waits for job changes.
           @type job_id: string
           @param job_id: Job ID for which to wait
           @return: C{None} if no changes have been detected and a dict with two keys,
             C{job_info} and C{log_entries} otherwise.
           @rtype: dict
           """
           body = {
             "fields": fields,
             "previous_job_info": prev_job_info,
             "previous_log_serial": prev_log_serial,
+            }
           return self._SendRequest(HTTP_GET,
                                    "/%s/jobs/%s/wait" % (GANETI_RAPI_VERSION, job_id),
                                    None, body)
         def CancelJob(self, job_id, dry_run=False):
           """Cancels a job.
           @type job_id: string
           @param job_id: id of the job to delete
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: tuple
           @return: tuple containing the result, and a message (bool, string)
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE,
                                    "/%s/jobs/%s" % (GANETI_RAPI_VERSION, job_id),
                                    query, None)
         def GetNodes(self, bulk=False):
           """Gets all nodes in the cluster.
           @type bulk: bool
           @param bulk: whether to return all information about all instances
           @rtype: list of dict or str
           @return: if bulk is true, info about nodes in the cluster,
               else list of nodes in the cluster
           """
           query = []
           _AppendIf(query, bulk, ("bulk", 1))
           nodes = self._SendRequest(HTTP_GET, "/%s/nodes" % GANETI_RAPI_VERSION,
                                     query, None)
           if bulk:
             return nodes
           else:
             return [n["id"] for n in nodes]
         def GetNode(self, node):
           """Gets information about a node.
           @type node: str
           @param node: node whose info to return
           @rtype: dict
           @return: info about the node
           """
           return self._SendRequest(HTTP_GET,
                                    "/%s/nodes/%s" % (GANETI_RAPI_VERSION, node),
                                    None, None)
         def EvacuateNode(self, node, iallocator=None, remote_node=None,
                          dry_run=False, early_release=None,
                          mode=None, accept_old=False):
           """Evacuates instances from a Ganeti node.
           @type node: str
           @param node: node to evacuate
           @type iallocator: str or None
           @param iallocator: instance allocator to use
           @type remote_node: str
           @param remote_node: node to evaucate to
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @type early_release: bool
           @param early_release: whether to enable parallelization
           @type mode: string
           @param mode: Node evacuation mode
           @type accept_old: bool
           @param accept_old: Whether caller is ready to accept old-style (pre-2.5)
               results
           @rtype: string, or a list for pre-2.5 results
           @return: Job ID or, if C{accept_old} is set and server is pre-2.5,
             list of (job ID, instance name, new secondary node); if dry_run was
             specified, then the actual move jobs were not submitted and the job IDs
             will be C{None}
           @raises GanetiApiError: if an iallocator and remote_node are both
               specified
           """
           if iallocator and remote_node:
             raise GanetiApiError("Only one of iallocator or remote_node can be used")
           query = []
           _AppendDryRunIf(query, dry_run)
           if _NODE_EVAC_RES1 in self.GetFeatures():
             # Server supports body parameters
             body = {}
             _SetItemIf(body, iallocator is not None, "iallocator", iallocator)
             _SetItemIf(body, remote_node is not None, "remote_node", remote_node)
             _SetItemIf(body, early_release is not None,
                        "early_release", early_release)
             _SetItemIf(body, mode is not None, "mode", mode)
           else:
             # Pre-2.5 request format
             body = None
             if not accept_old:
               raise GanetiApiError("Server is version 2.4 or earlier and caller does"
                                    " not accept old-style results (parameter"
                                    " accept_old)")
             # Pre-2.5 servers can only evacuate secondaries
             if mode is not None and mode != NODE_EVAC_SEC:
               raise GanetiApiError("Server can only evacuate secondary instances")
             _AppendIf(query, iallocator, ("iallocator", iallocator))
             _AppendIf(query, remote_node, ("remote_node", remote_node))
             _AppendIf(query, early_release, ("early_release", 1))
           return self._SendRequest(HTTP_POST,
                                    ("/%s/nodes/%s/evacuate" %
                                     (GANETI_RAPI_VERSION, node)), query, body)
         def MigrateNode(self, node, mode=None, dry_run=False, iallocator=None,
                         target_node=None):
           """Migrates all primary instances from a node.
           @type node: str
           @param node: node to migrate
           @type mode: string
           @param mode: if passed, it will overwrite the live migration type,
               otherwise the hypervisor default will be used
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @type iallocator: string
           @param iallocator: instance allocator to use
           @type target_node: string
           @param target_node: Target node for shared-storage instances
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           if _NODE_MIGRATE_REQV1 in self.GetFeatures():
             body = {}
             _SetItemIf(body, mode is not None, "mode", mode)
             _SetItemIf(body, iallocator is not None, "iallocator", iallocator)
             _SetItemIf(body, target_node is not None, "target_node", target_node)
             assert len(query) <= 1
             return self._SendRequest(HTTP_POST,
                                      ("/%s/nodes/%s/migrate" %
                                       (GANETI_RAPI_VERSION, node)), query, body)
           else:
             # Use old request format
             if target_node is not None:
               raise GanetiApiError("Server does not support specifying target node"
                                    " for node migration")
             _AppendIf(query, mode is not None, ("mode", mode))
             return self._SendRequest(HTTP_POST,
                                      ("/%s/nodes/%s/migrate" %
                                       (GANETI_RAPI_VERSION, node)), query, None)
         def GetNodeRole(self, node):
           """Gets the current role for a node.
           @type node: str
           @param node: node whose role to return
           @rtype: str
           @return: the current role for a node
           """
           return self._SendRequest(HTTP_GET,
                                    ("/%s/nodes/%s/role" %
                                     (GANETI_RAPI_VERSION, node)), None, None)
         def SetNodeRole(self, node, role, force=False, auto_promote=None):
           """Sets the role for a node.
           @type node: str
           @param node: the node whose role to set
           @type role: str
           @param role: the role to set for the node
           @type force: bool
           @param force: whether to force the role change
           @type auto_promote: bool
           @param auto_promote: Whether node(s) should be promoted to master candidate
                                if necessary
           @rtype: string
           @return: job id
           """
           query = []
           _AppendForceIf(query, force)
           _AppendIf(query, auto_promote is not None, ("auto-promote", auto_promote))
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/nodes/%s/role" %
                                     (GANETI_RAPI_VERSION, node)), query, role)
         def PowercycleNode(self, node, force=False):
           """Powercycles a node.
           @type node: string
           @param node: Node name
           @type force: bool
           @param force: Whether to force the operation
           @rtype: string
           @return: job id
           """
           query = []
           _AppendForceIf(query, force)
           return self._SendRequest(HTTP_POST,
                                    ("/%s/nodes/%s/powercycle" %
                                     (GANETI_RAPI_VERSION, node)), query, None)
         def ModifyNode(self, node, **kwargs):
           """Modifies a node.
           More details for parameters can be found in the RAPI documentation.
           @type node: string
           @param node: Node name
           @rtype: string
           @return: job id
           """
           return self._SendRequest(HTTP_POST,
                                    ("/%s/nodes/%s/modify" %
                                     (GANETI_RAPI_VERSION, node)), None, kwargs)
         def GetNodeStorageUnits(self, node, storage_type, output_fields):
           """Gets the storage units for a node.
           @type node: str
           @param node: the node whose storage units to return
           @type storage_type: str
           @param storage_type: storage type whose units to return
           @type output_fields: str
           @param output_fields: storage type fields to return
           @rtype: string
           @return: job id where results can be retrieved
           """
           query = [
             ("storage_type", storage_type),
             ("output_fields", output_fields),
+            ]
           return self._SendRequest(HTTP_GET,
                                    ("/%s/nodes/%s/storage" %
                                     (GANETI_RAPI_VERSION, node)), query, None)
         def ModifyNodeStorageUnits(self, node, storage_type, name, allocatable=None):
           """Modifies parameters of storage units on the node.
           @type node: str
           @param node: node whose storage units to modify
           @type storage_type: str
           @param storage_type: storage type whose units to modify
           @type name: str
           @param name: name of the storage unit
           @type allocatable: bool or None
           @param allocatable: Whether to set the "allocatable" flag on the storage
                               unit (None=no modification, True=set, False=unset)
           @rtype: string
           @return: job id
           """
           query = [
             ("storage_type", storage_type),
             ("name", name),
+            ]
           _AppendIf(query, allocatable is not None, ("allocatable", allocatable))
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/nodes/%s/storage/modify" %
                                     (GANETI_RAPI_VERSION, node)), query, None)
         def RepairNodeStorageUnits(self, node, storage_type, name):
           """Repairs a storage unit on the node.
           @type node: str
           @param node: node whose storage units to repair
           @type storage_type: str
           @param storage_type: storage type to repair
           @type name: str
           @param name: name of the storage unit to repair
           @rtype: string
           @return: job id
           """
           query = [
             ("storage_type", storage_type),
             ("name", name),
+            ]
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/nodes/%s/storage/repair" %
                                     (GANETI_RAPI_VERSION, node)), query, None)
         def GetNodeTags(self, node):
           """Gets the tags for a node.
           @type node: str
           @param node: node whose tags to return
           @rtype: list of str
           @return: tags for the node
           """
           return self._SendRequest(HTTP_GET,
                                    ("/%s/nodes/%s/tags" %
                                     (GANETI_RAPI_VERSION, node)), None, None)
         def AddNodeTags(self, node, tags, dry_run=False):
           """Adds tags to a node.
           @type node: str
           @param node: node to add tags to
           @type tags: list of str
           @param tags: tags to add to the node
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/nodes/%s/tags" %
                                     (GANETI_RAPI_VERSION, node)), query, tags)
         def DeleteNodeTags(self, node, tags, dry_run=False):
           """Delete tags from a node.
           @type node: str
           @param node: node to remove tags from
           @type tags: list of str
           @param tags: tags to remove from the node
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE,
                                    ("/%s/nodes/%s/tags" %
                                     (GANETI_RAPI_VERSION, node)), query, None)
         def GetNetworks(self, bulk=False):
           """Gets all networks in the cluster.
           @type bulk: bool
           @param bulk: whether to return all information about the networks
           @rtype: list of dict or str
           @return: if bulk is true, a list of dictionaries with info about all
               networks in the cluster, else a list of names of those networks
           """
           query = []
           _AppendIf(query, bulk, ("bulk", 1))
           networks = self._SendRequest(HTTP_GET, "/%s/networks" % GANETI_RAPI_VERSION,
                                      query, None)
           if bulk:
             return networks
           else:
             return [n["name"] for n in networks]
         def GetNetwork(self, network):
           """Gets information about a network.
           @type group: str
           @param group: name of the network whose info to return
           @rtype: dict
           @return: info about the network
           """
           return self._SendRequest(HTTP_GET,
                                    "/%s/networks/%s" % (GANETI_RAPI_VERSION, network),
                                    None, None)
         def CreateNetwork(self, network_name, network, gateway=None, network6=None,
                           gateway6=None, mac_prefix=None,
                           add_reserved_ips=None, tags=[],
                           conflicts_check=False, dry_run=False):
           """Creates a new network.
           @type name: str
           @param name: the name of network to create
           @type dry_run: bool
           @param dry_run: whether to peform a dry run
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           body = {
             "network_name": network_name,
             "gateway": gateway,
             "network": network,
             "gateway6": gateway6,
             "network6": network6,
             "mac_prefix": mac_prefix,
             "add_reserved_ips": add_reserved_ips,
             "conflicts_check": conflicts_check,
             "tags": tags,
+            }
           return self._SendRequest(HTTP_POST, "/%s/networks" % GANETI_RAPI_VERSION,
                                    query, body)
         def ConnectNetwork(self, network_name, group_name, mode, link,
                            conflicts_check=False, depends=None, dry_run=False):
           """Connects a Network to a NodeGroup with the given netparams
           """
           body = {
             "group_name": group_name,
             "network_mode": mode,
             "network_link": link,
             "conflicts_check": conflicts_check,
+            }
           if depends:
             body['depends'] = depends
           query = []
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/networks/%s/connect" %
                                    (GANETI_RAPI_VERSION, network_name)), query, body)
         def DisconnectNetwork(self, network_name, group_name,
                               depends=None, dry_run=False):
           """Connects a Network to a NodeGroup with the given netparams
           """
           body = {
             "group_name": group_name
+            }
           if depends:
             body['depends'] = depends
           query = []
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/networks/%s/disconnect" %
                                    (GANETI_RAPI_VERSION, network_name)), query, body)
         def ModifyNetwork(self, network, **kwargs):
           """Modifies a network.
           More details for parameters can be found in the RAPI documentation.
           @type network: string
           @param network: Network name
           @rtype: string
           @return: job id
           """
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/networks/%s/modify" %
                                     (GANETI_RAPI_VERSION, network)), None, kwargs)
         def DeleteNetwork(self, network, depends=None, dry_run=False):
           """Deletes a network.
           @type group: str
           @param group: the network to delete
           @type dry_run: bool
           @param dry_run: whether to peform a dry run
           @rtype: string
           @return: job id
           """
           body = {}
           if depends:
             body['depends'] = depends
           query = []
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE,
                                    ("/%s/networks/%s" %
                                     (GANETI_RAPI_VERSION, network)), query, body)
         def GetNetworkTags(self, network):
           """Gets tags for a network.
           @type network: string
           @param network: Node group whose tags to return
           @rtype: list of strings
           @return: tags for the network
           """
           return self._SendRequest(HTTP_GET,
                                    ("/%s/networks/%s/tags" %
                                     (GANETI_RAPI_VERSION, network)), None, None)
         def AddNetworkTags(self, network, tags, dry_run=False):
           """Adds tags to a network.
           @type network: str
           @param network: network to add tags to
           @type tags: list of string
           @param tags: tags to add to the network
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/networks/%s/tags" %
                                     (GANETI_RAPI_VERSION, network)), query, None)
         def DeleteNetworkTags(self, network, tags, dry_run=False):
           """Deletes tags from a network.
           @type network: str
           @param network: network to delete tags from
           @type tags: list of string
           @param tags: tags to delete
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE,
                                    ("/%s/networks/%s/tags" %
                                     (GANETI_RAPI_VERSION, network)), query, None)
         def GetGroups(self, bulk=False):
           """Gets all node groups in the cluster.
           @type bulk: bool
           @param bulk: whether to return all information about the groups
           @rtype: list of dict or str
           @return: if bulk is true, a list of dictionaries with info about all node
               groups in the cluster, else a list of names of those node groups
           """
           query = []
           _AppendIf(query, bulk, ("bulk", 1))
           groups = self._SendRequest(HTTP_GET, "/%s/groups" % GANETI_RAPI_VERSION,
                                      query, None)
           if bulk:
             return groups
           else:
             return [g["name"] for g in groups]
         def GetGroup(self, group):
           """Gets information about a node group.
           @type group: str
           @param group: name of the node group whose info to return
           @rtype: dict
           @return: info about the node group
           """
           return self._SendRequest(HTTP_GET,
                                    "/%s/groups/%s" % (GANETI_RAPI_VERSION, group),
                                    None, None)
         def CreateGroup(self, name, alloc_policy=None, dry_run=False):
           """Creates a new node group.
           @type name: str
           @param name: the name of node group to create
           @type alloc_policy: str
           @param alloc_policy: the desired allocation policy for the group, if any
           @type dry_run: bool
           @param dry_run: whether to peform a dry run
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           body = {
             "name": name,
             "alloc_policy": alloc_policy
+            }
           return self._SendRequest(HTTP_POST, "/%s/groups" % GANETI_RAPI_VERSION,
                                    query, body)
         def ModifyGroup(self, group, **kwargs):
           """Modifies a node group.
           More details for parameters can be found in the RAPI documentation.
           @type group: string
           @param group: Node group name
           @rtype: string
           @return: job id
           """
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/groups/%s/modify" %
                                     (GANETI_RAPI_VERSION, group)), None, kwargs)
         def DeleteGroup(self, group, dry_run=False):
           """Deletes a node group.
           @type group: str
           @param group: the node group to delete
           @type dry_run: bool
           @param dry_run: whether to peform a dry run
           @rtype: string
           @return: job id
           """
           query = []
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE,
                                    ("/%s/groups/%s" %
                                     (GANETI_RAPI_VERSION, group)), query, None)
         def RenameGroup(self, group, new_name):
           """Changes the name of a node group.
           @type group: string
           @param group: Node group name
           @type new_name: string
           @param new_name: New node group name
           @rtype: string
           @return: job id
           """
           body = {
             "new_name": new_name,
+            }
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/groups/%s/rename" %
                                     (GANETI_RAPI_VERSION, group)), None, body)
         def AssignGroupNodes(self, group, nodes, force=False, dry_run=False):
           """Assigns nodes to a group.
           @type group: string
           @param group: Node gropu name
           @type nodes: list of strings
           @param nodes: List of nodes to assign to the group
           @rtype: string
           @return: job id
           """
           query = []
           _AppendForceIf(query, force)
           _AppendDryRunIf(query, dry_run)
           body = {
             "nodes": nodes,
+            }
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/groups/%s/assign-nodes" %
                                    (GANETI_RAPI_VERSION, group)), query, body)
         def GetGroupTags(self, group):
           """Gets tags for a node group.
           @type group: string
           @param group: Node group whose tags to return
           @rtype: list of strings
           @return: tags for the group
           """
           return self._SendRequest(HTTP_GET,
                                    ("/%s/groups/%s/tags" %
                                     (GANETI_RAPI_VERSION, group)), None, None)
         def AddGroupTags(self, group, tags, dry_run=False):
           """Adds tags to a node group.
           @type group: str
           @param group: group to add tags to
           @type tags: list of string
           @param tags: tags to add to the group
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/groups/%s/tags" %
                                     (GANETI_RAPI_VERSION, group)), query, None)
         def DeleteGroupTags(self, group, tags, dry_run=False):
           """Deletes tags from a node group.
           @type group: str
           @param group: group to delete tags from
           @type tags: list of string
           @param tags: tags to delete
           @type dry_run: bool
           @param dry_run: whether to perform a dry run
           @rtype: string
           @return: job id
           """
           query = [("tag", t) for t in tags]
           _AppendDryRunIf(query, dry_run)
           return self._SendRequest(HTTP_DELETE,
                                    ("/%s/groups/%s/tags" %
                                     (GANETI_RAPI_VERSION, group)), query, None)
         def Query(self, what, fields, qfilter=None):
           """Retrieves information about resources.
           @type what: string
           @param what: Resource name, one of L{constants.QR_VIA_RAPI}
           @type fields: list of string
           @param fields: Requested fields
           @type qfilter: None or list
           @param qfilter: Query filter
           @rtype: string
           @return: job id
           """
           body = {
             "fields": fields,
+            }
           _SetItemIf(body, qfilter is not None, "qfilter", qfilter)
           # TODO: remove "filter" after 2.7
           _SetItemIf(body, qfilter is not None, "filter", qfilter)
           return self._SendRequest(HTTP_PUT,
                                    ("/%s/query/%s" %
                                     (GANETI_RAPI_VERSION, what)), None, body)
         def QueryFields(self, what, fields=None):
           """Retrieves available fields for a resource.
           @type what: string
           @param what: Resource name, one of L{constants.QR_VIA_RAPI}
           @type fields: list of string
           @param fields: Requested fields
           @rtype: string
           @return: job id
           """
           query = []
           if fields is not None:
             _AppendIf(query, True, ("fields", ",".join(fields)))
           return self._SendRequest(HTTP_GET,
                                    ("/%s/query/%s/fields" %
                                     (GANETI_RAPI_VERSION, what)), query, None)