/lib/rpc.py - ganeti-local - Greek Research and Technology Network's projects

| Branch: | Tag: | Revision:

root / lib / rpc.py @ a629ecb9

History | View | Annotate | Download (48.3 kB)

+      #
+      #
       # Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Google Inc.
+      #
       # 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.
       """Inter-node RPC library.
       """
       # pylint: disable=C0103,R0201,R0904
       # C0103: Invalid name, since call_ are not valid
       # R0201: Method could be a function, we keep all rpcs instance methods
       # as not to change them back and forth between static/instance methods
       # if they need to start using instance attributes
       # R0904: Too many public methods
       import os
       import logging
       import zlib
       import base64
       import pycurl
       import threading
       from ganeti import utils
       from ganeti import objects
       from ganeti import http
       from ganeti import serializer
       from ganeti import constants
       from ganeti import errors
       from ganeti import netutils
       from ganeti import ssconf
       from ganeti import runtime
       from ganeti import compat
       # pylint has a bug here, doesn't see this import
       import ganeti.http.client  # pylint: disable=W0611
       # Timeout for connecting to nodes (seconds)
       _RPC_CONNECT_TIMEOUT = 5
       _RPC_CLIENT_HEADERS = [
         "Content-type: %s" % http.HTTP_APP_JSON,
         "Expect:",
+        ]
       # Various time constants for the timeout table
       _TMO_URGENT = 60 # one minute
       _TMO_FAST = 5 * 60 # five minutes
       _TMO_NORMAL = 15 * 60 # 15 minutes
       _TMO_SLOW = 3600 # one hour
       _TMO_4HRS = 4 * 3600
       _TMO_1DAY = 86400
       # Timeout table that will be built later by decorators
       # Guidelines for choosing timeouts:
       # - call used during watcher: timeout -> 1min, _TMO_URGENT
       # - trivial (but be sure it is trivial) (e.g. reading a file): 5min, _TMO_FAST
       # - other calls: 15 min, _TMO_NORMAL
       # - special calls (instance add, etc.): either _TMO_SLOW (1h) or huge timeouts
       _TIMEOUTS = {
+      }
       #: Special value to describe an offline host
       _OFFLINE = object()
       def Init():
         """Initializes the module-global HTTP client manager.
         Must be called before using any RPC function and while exactly one thread is
         running.
         """
         # curl_global_init(3) and curl_global_cleanup(3) must be called with only
         # one thread running. This check is just a safety measure -- it doesn't
         # cover all cases.
         assert threading.activeCount() == 1, \
                "Found more than one active thread when initializing pycURL"
         logging.info("Using PycURL %s", pycurl.version)
         pycurl.global_init(pycurl.GLOBAL_ALL)
       def Shutdown():
         """Stops the module-global HTTP client manager.
         Must be called before quitting the program and while exactly one thread is
         running.
         """
         pycurl.global_cleanup()
       def _ConfigRpcCurl(curl):
         noded_cert = str(constants.NODED_CERT_FILE)
         curl.setopt(pycurl.FOLLOWLOCATION, False)
         curl.setopt(pycurl.CAINFO, noded_cert)
         curl.setopt(pycurl.SSL_VERIFYHOST, 0)
         curl.setopt(pycurl.SSL_VERIFYPEER, True)
         curl.setopt(pycurl.SSLCERTTYPE, "PEM")
         curl.setopt(pycurl.SSLCERT, noded_cert)
         curl.setopt(pycurl.SSLKEYTYPE, "PEM")
         curl.setopt(pycurl.SSLKEY, noded_cert)
         curl.setopt(pycurl.CONNECTTIMEOUT, _RPC_CONNECT_TIMEOUT)
       # Aliasing this module avoids the following warning by epydoc: "Warning: No
       # information available for ganeti.rpc._RpcThreadLocal's base threading.local"
       _threading = threading
       class _RpcThreadLocal(_threading.local):
         def GetHttpClientPool(self):
           """Returns a per-thread HTTP client pool.
           @rtype: L{http.client.HttpClientPool}
           """
           try:
             pool = self.hcp
           except AttributeError:
             pool = http.client.HttpClientPool(_ConfigRpcCurl)
             self.hcp = pool
           return pool
       # Remove module alias (see above)
       del _threading
       _thread_local = _RpcThreadLocal()
       def _RpcTimeout(secs):
         """Timeout decorator.
         When applied to a rpc call_* function, it updates the global timeout
         table with the given function/timeout.
         """
         def decorator(f):
           name = f.__name__
           assert name.startswith("call_")
           _TIMEOUTS[name[len("call_"):]] = secs
           return f
         return decorator
       def RunWithRPC(fn):
         """RPC-wrapper decorator.
         When applied to a function, it runs it with the RPC system
         initialized, and it shutsdown the system afterwards. This means the
         function must be called without RPC being initialized.
         """
         def wrapper(*args, **kwargs):
           Init()
           try:
             return fn(*args, **kwargs)
           finally:
             Shutdown()
         return wrapper
       def _Compress(data):
         """Compresses a string for transport over RPC.
         Small amounts of data are not compressed.
         @type data: str
         @param data: Data
         @rtype: tuple
         @return: Encoded data to send
         """
         # Small amounts of data are not compressed
         if len(data) < 512:
           return (constants.RPC_ENCODING_NONE, data)
         # Compress with zlib and encode in base64
         return (constants.RPC_ENCODING_ZLIB_BASE64,
                 base64.b64encode(zlib.compress(data, 3)))
       class RpcResult(object):
         """RPC Result class.
         This class holds an RPC result. It is needed since in multi-node
         calls we can't raise an exception just because one one out of many
         failed, and therefore we use this class to encapsulate the result.
         @ivar data: the data payload, for successful results, or None
         @ivar call: the name of the RPC call
         @ivar node: the name of the node to which we made the call
         @ivar offline: whether the operation failed because the node was
             offline, as opposed to actual failure; offline=True will always
             imply failed=True, in order to allow simpler checking if
             the user doesn't care about the exact failure mode
         @ivar fail_msg: the error message if the call failed
         """
         def __init__(self, data=None, failed=False, offline=False,
                      call=None, node=None):
           self.offline = offline
           self.call = call
           self.node = node
           if offline:
             self.fail_msg = "Node is marked offline"
             self.data = self.payload = None
           elif failed:
             self.fail_msg = self._EnsureErr(data)
             self.data = self.payload = None
           else:
             self.data = data
             if not isinstance(self.data, (tuple, list)):
               self.fail_msg = ("RPC layer error: invalid result type (%s)" %
                                type(self.data))
               self.payload = None
             elif len(data) != 2:
               self.fail_msg = ("RPC layer error: invalid result length (%d), "
                                "expected 2" % len(self.data))
               self.payload = None
             elif not self.data[0]:
               self.fail_msg = self._EnsureErr(self.data[1])
               self.payload = None
             else:
               # finally success
               self.fail_msg = None
               self.payload = data[1]
           for attr_name in ["call", "data", "fail_msg",
                             "node", "offline", "payload"]:
             assert hasattr(self, attr_name), "Missing attribute %s" % attr_name
         @staticmethod
         def _EnsureErr(val):
           """Helper to ensure we return a 'True' value for error."""
           if val:
             return val
           else:
             return "No error information"
         def Raise(self, msg, prereq=False, ecode=None):
           """If the result has failed, raise an OpExecError.
           This is used so that LU code doesn't have to check for each
           result, but instead can call this function.
           """
           if not self.fail_msg:
             return
           if not msg: # one could pass None for default message
             msg = ("Call '%s' to node '%s' has failed: %s" %
                    (self.call, self.node, self.fail_msg))
           else:
             msg = "%s: %s" % (msg, self.fail_msg)
           if prereq:
             ec = errors.OpPrereqError
           else:
             ec = errors.OpExecError
           if ecode is not None:
             args = (msg, ecode)
           else:
             args = (msg, )
           raise ec(*args) # pylint: disable=W0142
       def _SsconfResolver(node_list,
                           ssc=ssconf.SimpleStore,
                           nslookup_fn=netutils.Hostname.GetIP):
         """Return addresses for given node names.
         @type node_list: list
         @param node_list: List of node names
         @type ssc: class
         @param ssc: SimpleStore class that is used to obtain node->ip mappings
         @type nslookup_fn: callable
         @param nslookup_fn: function use to do NS lookup
         @rtype: list of tuple; (string, string)
         @return: List of tuples containing node name and IP address
         """
         ss = ssc()
         iplist = ss.GetNodePrimaryIPList()
         family = ss.GetPrimaryIPFamily()
         ipmap = dict(entry.split() for entry in iplist)
         result = []
         for node in node_list:
           ip = ipmap.get(node)
           if ip is None:
             ip = nslookup_fn(node, family=family)
           result.append((node, ip))
         return result
       class _StaticResolver:
         def __init__(self, addresses):
           """Initializes this class.
           """
           self._addresses = addresses
         def __call__(self, hosts):
           """Returns static addresses for hosts.
           """
           assert len(hosts) == len(self._addresses)
           return zip(hosts, self._addresses)
       def _CheckConfigNode(name, node):
         """Checks if a node is online.
         @type name: string
         @param name: Node name
         @type node: L{objects.Node} or None
         @param node: Node object
         """
         if node is None:
           # Depend on DNS for name resolution
           ip = name
         elif node.offline:
           ip = _OFFLINE
         else:
           ip = node.primary_ip
         return (name, ip)
       def _NodeConfigResolver(single_node_fn, all_nodes_fn, hosts):
         """Calculate node addresses using configuration.
         """
         # Special case for single-host lookups
         if len(hosts) == 1:
           (name, ) = hosts
           return [_CheckConfigNode(name, single_node_fn(name))]
         else:
           all_nodes = all_nodes_fn()
           return [_CheckConfigNode(name, all_nodes.get(name, None))
                   for name in hosts]
       class _RpcProcessor:
         def __init__(self, resolver, port, lock_monitor_cb=None):
           """Initializes this class.
           @param resolver: callable accepting a list of hostnames, returning a list
             of tuples containing name and IP address (IP address can be the name or
             the special value L{_OFFLINE} to mark offline machines)
           @type port: int
           @param port: TCP port
           @param lock_monitor_cb: Callable for registering with lock monitor
           """
           self._resolver = resolver
           self._port = port
           self._lock_monitor_cb = lock_monitor_cb
         @staticmethod
         def _PrepareRequests(hosts, port, procedure, body, read_timeout):
           """Prepares requests by sorting offline hosts into separate list.
           """
           results = {}
           requests = {}
           for (name, ip) in hosts:
             if ip is _OFFLINE:
               # Node is marked as offline
               results[name] = RpcResult(node=name, offline=True, call=procedure)
             else:
               requests[name] = \
                 http.client.HttpClientRequest(str(ip), port,
                                               http.HTTP_PUT, str("/%s" % procedure),
                                               headers=_RPC_CLIENT_HEADERS,
                                               post_data=body,
                                               read_timeout=read_timeout,
                                               nicename="%s/%s" % (name, procedure))
           return (results, requests)
         @staticmethod
         def _CombineResults(results, requests, procedure):
           """Combines pre-computed results for offline hosts with actual call results.
           """
           for name, req in requests.items():
             if req.success and req.resp_status_code == http.HTTP_OK:
               host_result = RpcResult(data=serializer.LoadJson(req.resp_body),
                                       node=name, call=procedure)
             else:
               # TODO: Better error reporting
               if req.error:
                 msg = req.error
               else:
                 msg = req.resp_body
               logging.error("RPC error in %s on node %s: %s", procedure, name, msg)
               host_result = RpcResult(data=msg, failed=True, node=name,
                                       call=procedure)
             results[name] = host_result
           return results
         def __call__(self, hosts, procedure, body, read_timeout=None, http_pool=None):
           """Makes an RPC request to a number of nodes.
           @type hosts: sequence
           @param hosts: Hostnames
           @type procedure: string
           @param procedure: Request path
           @type body: string
           @param body: Request body
           @type read_timeout: int or None
           @param read_timeout: Read timeout for request
           """
           assert procedure in _TIMEOUTS, "RPC call not declared in the timeouts table"
           if not http_pool:
             http_pool = _thread_local.GetHttpClientPool()
           if read_timeout is None:
             read_timeout = _TIMEOUTS[procedure]
           (results, requests) = \
             self._PrepareRequests(self._resolver(hosts), self._port, procedure,
                                   str(body), read_timeout)
           http_pool.ProcessRequests(requests.values(),
                                     lock_monitor_cb=self._lock_monitor_cb)
           assert not frozenset(results).intersection(requests)
           return self._CombineResults(results, requests, procedure)
       def _EncodeImportExportIO(ieio, ieioargs):
         """Encodes import/export I/O information.
         """
         if ieio == constants.IEIO_RAW_DISK:
           assert len(ieioargs) == 1
           return (ieioargs[0].ToDict(), )
         if ieio == constants.IEIO_SCRIPT:
           assert len(ieioargs) == 2
           return (ieioargs[0].ToDict(), ieioargs[1])
         return ieioargs
       class RpcRunner(object):
         """RPC runner class.
         """
         def __init__(self, context):
           """Initialized the RPC runner.
           @type context: C{masterd.GanetiContext}
           @param context: Ganeti context
           """
           self._cfg = context.cfg
           self._proc = _RpcProcessor(compat.partial(_NodeConfigResolver,
                                                     self._cfg.GetNodeInfo,
                                                     self._cfg.GetAllNodesInfo),
                                      netutils.GetDaemonPort(constants.NODED),
                                      lock_monitor_cb=context.glm.AddToLockMonitor)
         def _InstDict(self, instance, hvp=None, bep=None, osp=None):
           """Convert the given instance to a dict.
           This is done via the instance's ToDict() method and additionally
           we fill the hvparams with the cluster defaults.
           @type instance: L{objects.Instance}
           @param instance: an Instance object
           @type hvp: dict or None
           @param hvp: a dictionary with overridden hypervisor parameters
           @type bep: dict or None
           @param bep: a dictionary with overridden backend parameters
           @type osp: dict or None
           @param osp: a dictionary with overridden os parameters
           @rtype: dict
           @return: the instance dict, with the hvparams filled with the
               cluster defaults
           """
           idict = instance.ToDict()
           cluster = self._cfg.GetClusterInfo()
           idict["hvparams"] = cluster.FillHV(instance)
           if hvp is not None:
             idict["hvparams"].update(hvp)
           idict["beparams"] = cluster.FillBE(instance)
           if bep is not None:
             idict["beparams"].update(bep)
           idict["osparams"] = cluster.SimpleFillOS(instance.os, instance.osparams)
           if osp is not None:
             idict["osparams"].update(osp)
           for nic in idict["nics"]:
             nic['nicparams'] = objects.FillDict(
               cluster.nicparams[constants.PP_DEFAULT],
               nic['nicparams'])
           return idict
         def _MultiNodeCall(self, node_list, procedure, args, read_timeout=None):
           """Helper for making a multi-node call
           """
           body = serializer.DumpJson(args, indent=False)
           return self._proc(node_list, procedure, body, read_timeout=read_timeout)
         @staticmethod
         def _StaticMultiNodeCall(node_list, procedure, args,
                                  address_list=None, read_timeout=None):
           """Helper for making a multi-node static call
           """
           body = serializer.DumpJson(args, indent=False)
           if address_list is None:
             resolver = _SsconfResolver
           else:
             # Caller provided an address list
             resolver = _StaticResolver(address_list)
           proc = _RpcProcessor(resolver,
                                netutils.GetDaemonPort(constants.NODED))
           return proc(node_list, procedure, body, read_timeout=read_timeout)
         def _SingleNodeCall(self, node, procedure, args, read_timeout=None):
           """Helper for making a single-node call
           """
           body = serializer.DumpJson(args, indent=False)
           return self._proc([node], procedure, body, read_timeout=read_timeout)[node]
         @classmethod
         def _StaticSingleNodeCall(cls, node, procedure, args, read_timeout=None):
           """Helper for making a single-node static call
           """
           body = serializer.DumpJson(args, indent=False)
           proc = _RpcProcessor(_SsconfResolver,
                                netutils.GetDaemonPort(constants.NODED))
           return proc([node], procedure, body, read_timeout=read_timeout)[node]
+        #
         # Begin RPC calls
+        #
         @_RpcTimeout(_TMO_URGENT)
         def call_bdev_sizes(self, node_list, devices):
           """Gets the sizes of requested block devices present on a node
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "bdev_sizes", [devices])
         @_RpcTimeout(_TMO_URGENT)
         def call_lv_list(self, node_list, vg_name):
           """Gets the logical volumes present in a given volume group.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "lv_list", [vg_name])
         @_RpcTimeout(_TMO_URGENT)
         def call_vg_list(self, node_list):
           """Gets the volume group list.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "vg_list", [])
         @_RpcTimeout(_TMO_NORMAL)
         def call_storage_list(self, node_list, su_name, su_args, name, fields):
           """Get list of storage units.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "storage_list",
                                      [su_name, su_args, name, fields])
         @_RpcTimeout(_TMO_NORMAL)
         def call_storage_modify(self, node, su_name, su_args, name, changes):
           """Modify a storage unit.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "storage_modify",
                                       [su_name, su_args, name, changes])
         @_RpcTimeout(_TMO_NORMAL)
         def call_storage_execute(self, node, su_name, su_args, name, op):
           """Executes an operation on a storage unit.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "storage_execute",
                                       [su_name, su_args, name, op])
         @_RpcTimeout(_TMO_URGENT)
         def call_bridges_exist(self, node, bridges_list):
           """Checks if a node has all the bridges given.
           This method checks if all bridges given in the bridges_list are
           present on the remote node, so that an instance that uses interfaces
           on those bridges can be started.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "bridges_exist", [bridges_list])
         @_RpcTimeout(_TMO_NORMAL)
         def call_instance_start(self, node, instance, hvp, bep, startup_paused):
           """Starts an instance.
           This is a single-node call.
           """
           idict = self._InstDict(instance, hvp=hvp, bep=bep)
           return self._SingleNodeCall(node, "instance_start", [idict, startup_paused])
         @_RpcTimeout(_TMO_NORMAL)
         def call_instance_shutdown(self, node, instance, timeout):
           """Stops an instance.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "instance_shutdown",
                                       [self._InstDict(instance), timeout])
         @_RpcTimeout(_TMO_NORMAL)
         def call_migration_info(self, node, instance):
           """Gather the information necessary to prepare an instance migration.
           This is a single-node call.
           @type node: string
           @param node: the node on which the instance is currently running
           @type instance: C{objects.Instance}
           @param instance: the instance definition
           """
           return self._SingleNodeCall(node, "migration_info",
                                       [self._InstDict(instance)])
         @_RpcTimeout(_TMO_NORMAL)
         def call_accept_instance(self, node, instance, info, target):
           """Prepare a node to accept an instance.
           This is a single-node call.
           @type node: string
           @param node: the target node for the migration
           @type instance: C{objects.Instance}
           @param instance: the instance definition
           @type info: opaque/hypervisor specific (string/data)
           @param info: result for the call_migration_info call
           @type target: string
           @param target: target hostname (usually ip address) (on the node itself)
           """
           return self._SingleNodeCall(node, "accept_instance",
                                       [self._InstDict(instance), info, target])
         @_RpcTimeout(_TMO_NORMAL)
         def call_instance_finalize_migration_dst(self, node, instance, info, success):
           """Finalize any target-node migration specific operation.
           This is called both in case of a successful migration and in case of error
           (in which case it should abort the migration).
           This is a single-node call.
           @type node: string
           @param node: the target node for the migration
           @type instance: C{objects.Instance}
           @param instance: the instance definition
           @type info: opaque/hypervisor specific (string/data)
           @param info: result for the call_migration_info call
           @type success: boolean
           @param success: whether the migration was a success or a failure
           """
           return self._SingleNodeCall(node, "instance_finalize_migration_dst",
                                       [self._InstDict(instance), info, success])
         @_RpcTimeout(_TMO_SLOW)
         def call_instance_migrate(self, node, instance, target, live):
           """Migrate an instance.
           This is a single-node call.
           @type node: string
           @param node: the node on which the instance is currently running
           @type instance: C{objects.Instance}
           @param instance: the instance definition
           @type target: string
           @param target: the target node name
           @type live: boolean
           @param live: whether the migration should be done live or not (the
               interpretation of this parameter is left to the hypervisor)
           """
           return self._SingleNodeCall(node, "instance_migrate",
                                       [self._InstDict(instance), target, live])
         @_RpcTimeout(_TMO_SLOW)
         def call_instance_finalize_migration_src(self, node, instance, success, live):
           """Finalize the instance migration on the source node.
           This is a single-node call.
           @type instance: L{objects.Instance}
           @param instance: the instance that was migrated
           @type success: bool
           @param success: whether the migration succeeded or not
           @type live: bool
           @param live: whether the user requested a live migration or not
           """
           return self._SingleNodeCall(node, "instance_finalize_migration_src",
                                       [self._InstDict(instance), success, live])
         @_RpcTimeout(_TMO_SLOW)
         def call_instance_get_migration_status(self, node, instance):
           """Report migration status.
           This is a single-node call that must be executed on the source node.
           @type instance: L{objects.Instance}
           @param instance: the instance that is being migrated
           @rtype: L{objects.MigrationStatus}
           @return: the status of the current migration (one of
                    L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
                    progress info that can be retrieved from the hypervisor
           """
           result = self._SingleNodeCall(node, "instance_get_migration_status",
                                         [self._InstDict(instance)])
           if not result.fail_msg and result.payload is not None:
             result.payload = objects.MigrationStatus.FromDict(result.payload)
           return result
         @_RpcTimeout(_TMO_NORMAL)
         def call_instance_reboot(self, node, inst, reboot_type, shutdown_timeout):
           """Reboots an instance.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "instance_reboot",
                                       [self._InstDict(inst), reboot_type,
                                        shutdown_timeout])
         @_RpcTimeout(_TMO_1DAY)
         def call_instance_os_add(self, node, inst, reinstall, debug, osparams=None):
           """Installs an OS on the given instance.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "instance_os_add",
                                       [self._InstDict(inst, osp=osparams),
                                        reinstall, debug])
         @_RpcTimeout(_TMO_SLOW)
         def call_instance_run_rename(self, node, inst, old_name, debug):
           """Run the OS rename script for an instance.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "instance_run_rename",
                                       [self._InstDict(inst), old_name, debug])
         @_RpcTimeout(_TMO_URGENT)
         def call_instance_info(self, node, instance, hname):
           """Returns information about a single instance.
           This is a single-node call.
           @type node: list
           @param node: the list of nodes to query
           @type instance: string
           @param instance: the instance name
           @type hname: string
           @param hname: the hypervisor type of the instance
           """
           return self._SingleNodeCall(node, "instance_info", [instance, hname])
         @_RpcTimeout(_TMO_NORMAL)
         def call_instance_migratable(self, node, instance):
           """Checks whether the given instance can be migrated.
           This is a single-node call.
           @param node: the node to query
           @type instance: L{objects.Instance}
           @param instance: the instance to check
           """
           return self._SingleNodeCall(node, "instance_migratable",
                                       [self._InstDict(instance)])
         @_RpcTimeout(_TMO_URGENT)
         def call_all_instances_info(self, node_list, hypervisor_list):
           """Returns information about all instances on the given nodes.
           This is a multi-node call.
           @type node_list: list
           @param node_list: the list of nodes to query
           @type hypervisor_list: list
           @param hypervisor_list: the hypervisors to query for instances
           """
           return self._MultiNodeCall(node_list, "all_instances_info",
                                      [hypervisor_list])
         @_RpcTimeout(_TMO_URGENT)
         def call_instance_list(self, node_list, hypervisor_list):
           """Returns the list of running instances on a given node.
           This is a multi-node call.
           @type node_list: list
           @param node_list: the list of nodes to query
           @type hypervisor_list: list
           @param hypervisor_list: the hypervisors to query for instances
           """
           return self._MultiNodeCall(node_list, "instance_list", [hypervisor_list])
         @_RpcTimeout(_TMO_FAST)
         def call_node_tcp_ping(self, node, source, target, port, timeout,
                                live_port_needed):
           """Do a TcpPing on the remote node
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "node_tcp_ping",
                                       [source, target, port, timeout,
                                        live_port_needed])
         @_RpcTimeout(_TMO_FAST)
         def call_node_has_ip_address(self, node, address):
           """Checks if a node has the given IP address.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "node_has_ip_address", [address])
         @_RpcTimeout(_TMO_URGENT)
         def call_node_info(self, node_list, vg_name, hypervisor_type):
           """Return node information.
           This will return memory information and volume group size and free
           space.
           This is a multi-node call.
           @type node_list: list
           @param node_list: the list of nodes to query
           @type vg_name: C{string}
           @param vg_name: the name of the volume group to ask for disk space
               information
           @type hypervisor_type: C{str}
           @param hypervisor_type: the name of the hypervisor to ask for
               memory information
           """
           return self._MultiNodeCall(node_list, "node_info",
                                      [vg_name, hypervisor_type])
         @_RpcTimeout(_TMO_NORMAL)
         def call_etc_hosts_modify(self, node, mode, name, ip):
           """Modify hosts file with name
           @type node: string
           @param node: The node to call
           @type mode: string
           @param mode: The mode to operate. Currently "add" or "remove"
           @type name: string
           @param name: The host name to be modified
           @type ip: string
           @param ip: The ip of the entry (just valid if mode is "add")
           """
           return self._SingleNodeCall(node, "etc_hosts_modify", [mode, name, ip])
         @_RpcTimeout(_TMO_NORMAL)
         def call_node_verify(self, node_list, checkdict, cluster_name):
           """Request verification of given parameters.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "node_verify",
                                      [checkdict, cluster_name])
         @classmethod
         @_RpcTimeout(_TMO_FAST)
         def call_node_start_master_daemons(cls, node, no_voting):
           """Starts master daemons on a node.
           This is a single-node call.
           """
           return cls._StaticSingleNodeCall(node, "node_start_master_daemons",
                                            [no_voting])
         @classmethod
         @_RpcTimeout(_TMO_FAST)
         def call_node_activate_master_ip(cls, node):
           """Activates master IP on a node.
           This is a single-node call.
           """
           return cls._StaticSingleNodeCall(node, "node_activate_master_ip", [])
         @classmethod
         @_RpcTimeout(_TMO_FAST)
         def call_node_stop_master(cls, node):
           """Deactivates master IP and stops master daemons on a node.
           This is a single-node call.
           """
           return cls._StaticSingleNodeCall(node, "node_stop_master", [])
         @classmethod
         @_RpcTimeout(_TMO_FAST)
         def call_node_deactivate_master_ip(cls, node):
           """Deactivates master IP on a node.
           This is a single-node call.
           """
           return cls._StaticSingleNodeCall(node, "node_deactivate_master_ip", [])
         @classmethod
         @_RpcTimeout(_TMO_FAST)
         def call_node_change_master_netmask(cls, node, netmask):
           """Change master IP netmask.
           This is a single-node call.
           """
           return cls._StaticSingleNodeCall(node, "node_change_master_netmask",
                         [netmask])
         @classmethod
         @_RpcTimeout(_TMO_URGENT)
         def call_master_info(cls, node_list):
           """Query master info.
           This is a multi-node call.
           """
           # TODO: should this method query down nodes?
           return cls._StaticMultiNodeCall(node_list, "master_info", [])
         @classmethod
         @_RpcTimeout(_TMO_URGENT)
         def call_version(cls, node_list):
           """Query node version.
           This is a multi-node call.
           """
           return cls._StaticMultiNodeCall(node_list, "version", [])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_create(self, node, bdev, size, owner, on_primary, info):
           """Request creation of a given block device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_create",
                                       [bdev.ToDict(), size, owner, on_primary, info])
         @_RpcTimeout(_TMO_SLOW)
         def call_blockdev_wipe(self, node, bdev, offset, size):
           """Request wipe at given offset with given size of a block device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_wipe",
                                       [bdev.ToDict(), offset, size])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_remove(self, node, bdev):
           """Request removal of a given block device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_remove", [bdev.ToDict()])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_rename(self, node, devlist):
           """Request rename of the given block devices.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_rename",
                                       [(d.ToDict(), uid) for d, uid in devlist])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_pause_resume_sync(self, node, disks, pause):
           """Request a pause/resume of given block device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_pause_resume_sync",
                                       [[bdev.ToDict() for bdev in disks], pause])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_assemble(self, node, disk, owner, on_primary, idx):
           """Request assembling of a given block device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_assemble",
                                       [disk.ToDict(), owner, on_primary, idx])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_shutdown(self, node, disk):
           """Request shutdown of a given block device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_shutdown", [disk.ToDict()])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_addchildren(self, node, bdev, ndevs):
           """Request adding a list of children to a (mirroring) device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_addchildren",
                                       [bdev.ToDict(),
                                        [disk.ToDict() for disk in ndevs]])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_removechildren(self, node, bdev, ndevs):
           """Request removing a list of children from a (mirroring) device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_removechildren",
                                       [bdev.ToDict(),
                                        [disk.ToDict() for disk in ndevs]])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_getmirrorstatus(self, node, disks):
           """Request status of a (mirroring) device.
           This is a single-node call.
           """
           result = self._SingleNodeCall(node, "blockdev_getmirrorstatus",
                                         [dsk.ToDict() for dsk in disks])
           if not result.fail_msg:
             result.payload = [objects.BlockDevStatus.FromDict(i)
                               for i in result.payload]
           return result
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_getmirrorstatus_multi(self, node_list, node_disks):
           """Request status of (mirroring) devices from multiple nodes.
           This is a multi-node call.
           """
           result = self._MultiNodeCall(node_list, "blockdev_getmirrorstatus_multi",
                                        [dict((name, [dsk.ToDict() for dsk in disks])
                                              for name, disks in node_disks.items())])
           for nres in result.values():
             if nres.fail_msg:
               continue
             for idx, (success, status) in enumerate(nres.payload):
               if success:
                 nres.payload[idx] = (success, objects.BlockDevStatus.FromDict(status))
           return result
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_find(self, node, disk):
           """Request identification of a given block device.
           This is a single-node call.
           """
           result = self._SingleNodeCall(node, "blockdev_find", [disk.ToDict()])
           if not result.fail_msg and result.payload is not None:
             result.payload = objects.BlockDevStatus.FromDict(result.payload)
           return result
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_close(self, node, instance_name, disks):
           """Closes the given block devices.
           This is a single-node call.
           """
           params = [instance_name, [cf.ToDict() for cf in disks]]
           return self._SingleNodeCall(node, "blockdev_close", params)
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_getsize(self, node, disks):
           """Returns the size of the given disks.
           This is a single-node call.
           """
           params = [[cf.ToDict() for cf in disks]]
           return self._SingleNodeCall(node, "blockdev_getsize", params)
         @_RpcTimeout(_TMO_NORMAL)
         def call_drbd_disconnect_net(self, node_list, nodes_ip, disks):
           """Disconnects the network of the given drbd devices.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "drbd_disconnect_net",
                                      [nodes_ip, [cf.ToDict() for cf in disks]])
         @_RpcTimeout(_TMO_NORMAL)
         def call_drbd_attach_net(self, node_list, nodes_ip,
                                  disks, instance_name, multimaster):
           """Disconnects the given drbd devices.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "drbd_attach_net",
                                      [nodes_ip, [cf.ToDict() for cf in disks],
                                       instance_name, multimaster])
         @_RpcTimeout(_TMO_SLOW)
         def call_drbd_wait_sync(self, node_list, nodes_ip, disks):
           """Waits for the synchronization of drbd devices is complete.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "drbd_wait_sync",
                                      [nodes_ip, [cf.ToDict() for cf in disks]])
         @_RpcTimeout(_TMO_URGENT)
         def call_drbd_helper(self, node_list):
           """Gets drbd helper.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "drbd_helper", [])
         @classmethod
         @_RpcTimeout(_TMO_NORMAL)
         def call_upload_file(cls, node_list, file_name, address_list=None):
           """Upload a file.
           The node will refuse the operation in case the file is not on the
           approved file list.
           This is a multi-node call.
           @type node_list: list
           @param node_list: the list of node names to upload to
           @type file_name: str
           @param file_name: the filename to upload
           @type address_list: list or None
           @keyword address_list: an optional list of node addresses, in order
               to optimize the RPC speed
           """
           file_contents = utils.ReadFile(file_name)
           data = _Compress(file_contents)
           st = os.stat(file_name)
           getents = runtime.GetEnts()
           params = [file_name, data, st.st_mode, getents.LookupUid(st.st_uid),
                     getents.LookupGid(st.st_gid), st.st_atime, st.st_mtime]
           return cls._StaticMultiNodeCall(node_list, "upload_file", params,
                                           address_list=address_list)
         @classmethod
         @_RpcTimeout(_TMO_NORMAL)
         def call_write_ssconf_files(cls, node_list, values):
           """Write ssconf files.
           This is a multi-node call.
           """
           return cls._StaticMultiNodeCall(node_list, "write_ssconf_files", [values])
         @_RpcTimeout(_TMO_NORMAL)
         def call_run_oob(self, node, oob_program, command, remote_node, timeout):
           """Runs OOB.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "run_oob", [oob_program, command,
                                                         remote_node, timeout])
         @_RpcTimeout(_TMO_FAST)
         def call_os_diagnose(self, node_list):
           """Request a diagnose of OS definitions.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "os_diagnose", [])
         @_RpcTimeout(_TMO_FAST)
         def call_os_get(self, node, name):
           """Returns an OS definition.
           This is a single-node call.
           """
           result = self._SingleNodeCall(node, "os_get", [name])
           if not result.fail_msg and isinstance(result.payload, dict):
             result.payload = objects.OS.FromDict(result.payload)
           return result
         @_RpcTimeout(_TMO_FAST)
         def call_os_validate(self, required, nodes, name, checks, params):
           """Run a validation routine for a given OS.
           This is a multi-node call.
           """
           return self._MultiNodeCall(nodes, "os_validate",
                                      [required, name, checks, params])
         @_RpcTimeout(_TMO_NORMAL)
         def call_hooks_runner(self, node_list, hpath, phase, env):
           """Call the hooks runner.
           Args:
             - op: the OpCode instance
             - env: a dictionary with the environment
           This is a multi-node call.
           """
           params = [hpath, phase, env]
           return self._MultiNodeCall(node_list, "hooks_runner", params)
         @_RpcTimeout(_TMO_NORMAL)
         def call_iallocator_runner(self, node, name, idata):
           """Call an iallocator on a remote node
           Args:
             - name: the iallocator name
             - input: the json-encoded input string
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "iallocator_runner", [name, idata])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_grow(self, node, cf_bdev, amount, dryrun):
           """Request a snapshot of the given block device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_grow",
                                       [cf_bdev.ToDict(), amount, dryrun])
         @_RpcTimeout(_TMO_1DAY)
         def call_blockdev_export(self, node, cf_bdev,
                                  dest_node, dest_path, cluster_name):
           """Export a given disk to another node.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_export",
                                       [cf_bdev.ToDict(), dest_node, dest_path,
                                        cluster_name])
         @_RpcTimeout(_TMO_NORMAL)
         def call_blockdev_snapshot(self, node, cf_bdev):
           """Request a snapshot of the given block device.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "blockdev_snapshot", [cf_bdev.ToDict()])
         @_RpcTimeout(_TMO_NORMAL)
         def call_finalize_export(self, node, instance, snap_disks):
           """Request the completion of an export operation.
           This writes the export config file, etc.
           This is a single-node call.
           """
           flat_disks = []
           for disk in snap_disks:
             if isinstance(disk, bool):
               flat_disks.append(disk)
             else:
               flat_disks.append(disk.ToDict())
           return self._SingleNodeCall(node, "finalize_export",
                                       [self._InstDict(instance), flat_disks])
         @_RpcTimeout(_TMO_FAST)
         def call_export_info(self, node, path):
           """Queries the export information in a given path.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "export_info", [path])
         @_RpcTimeout(_TMO_FAST)
         def call_export_list(self, node_list):
           """Gets the stored exports list.
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "export_list", [])
         @_RpcTimeout(_TMO_FAST)
         def call_export_remove(self, node, export):
           """Requests removal of a given export.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "export_remove", [export])
         @classmethod
         @_RpcTimeout(_TMO_NORMAL)
         def call_node_leave_cluster(cls, node, modify_ssh_setup):
           """Requests a node to clean the cluster information it has.
           This will remove the configuration information from the ganeti data
           dir.
           This is a single-node call.
           """
           return cls._StaticSingleNodeCall(node, "node_leave_cluster",
                                            [modify_ssh_setup])
         @_RpcTimeout(_TMO_FAST)
         def call_node_volumes(self, node_list):
           """Gets all volumes on node(s).
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "node_volumes", [])
         @_RpcTimeout(_TMO_FAST)
         def call_node_demote_from_mc(self, node):
           """Demote a node from the master candidate role.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "node_demote_from_mc", [])
         @_RpcTimeout(_TMO_NORMAL)
         def call_node_powercycle(self, node, hypervisor):
           """Tries to powercycle a node.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "node_powercycle", [hypervisor])
         @_RpcTimeout(None)
         def call_test_delay(self, node_list, duration):
           """Sleep for a fixed time on given node(s).
           This is a multi-node call.
           """
           return self._MultiNodeCall(node_list, "test_delay", [duration],
                                      read_timeout=int(duration + 5))
         @_RpcTimeout(_TMO_FAST)
         def call_file_storage_dir_create(self, node, file_storage_dir):
           """Create the given file storage directory.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "file_storage_dir_create",
                                       [file_storage_dir])
         @_RpcTimeout(_TMO_FAST)
         def call_file_storage_dir_remove(self, node, file_storage_dir):
           """Remove the given file storage directory.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "file_storage_dir_remove",
                                       [file_storage_dir])
         @_RpcTimeout(_TMO_FAST)
         def call_file_storage_dir_rename(self, node, old_file_storage_dir,
                                          new_file_storage_dir):
           """Rename file storage directory.
           This is a single-node call.
           """
           return self._SingleNodeCall(node, "file_storage_dir_rename",
                                       [old_file_storage_dir, new_file_storage_dir])
         @classmethod
         @_RpcTimeout(_TMO_URGENT)
         def call_jobqueue_update(cls, node_list, address_list, file_name, content):
           """Update job queue.
           This is a multi-node call.
           """
           return cls._StaticMultiNodeCall(node_list, "jobqueue_update",
                                           [file_name, _Compress(content)],
                                           address_list=address_list)
         @classmethod
         @_RpcTimeout(_TMO_NORMAL)
         def call_jobqueue_purge(cls, node):
           """Purge job queue.
           This is a single-node call.
           """
           return cls._StaticSingleNodeCall(node, "jobqueue_purge", [])
         @classmethod
         @_RpcTimeout(_TMO_URGENT)
         def call_jobqueue_rename(cls, node_list, address_list, rename):
           """Rename a job queue file.
           This is a multi-node call.
           """
           return cls._StaticMultiNodeCall(node_list, "jobqueue_rename", rename,
                                           address_list=address_list)
         @_RpcTimeout(_TMO_NORMAL)
         def call_hypervisor_validate_params(self, node_list, hvname, hvparams):
           """Validate the hypervisor params.
           This is a multi-node call.
           @type node_list: list
           @param node_list: the list of nodes to query
           @type hvname: string
           @param hvname: the hypervisor name
           @type hvparams: dict
           @param hvparams: the hypervisor parameters to be validated
           """
           cluster = self._cfg.GetClusterInfo()
           hv_full = objects.FillDict(cluster.hvparams.get(hvname, {}), hvparams)
           return self._MultiNodeCall(node_list, "hypervisor_validate_params",
                                      [hvname, hv_full])
         @_RpcTimeout(_TMO_NORMAL)
         def call_x509_cert_create(self, node, validity):
           """Creates a new X509 certificate for SSL/TLS.
           This is a single-node call.
           @type validity: int
           @param validity: Validity in seconds
           """
           return self._SingleNodeCall(node, "x509_cert_create", [validity])
         @_RpcTimeout(_TMO_NORMAL)
         def call_x509_cert_remove(self, node, name):
           """Removes a X509 certificate.
           This is a single-node call.
           @type name: string
           @param name: Certificate name
           """
           return self._SingleNodeCall(node, "x509_cert_remove", [name])
         @_RpcTimeout(_TMO_NORMAL)
         def call_import_start(self, node, opts, instance, component,
                               dest, dest_args):
           """Starts a listener for an import.
           This is a single-node call.
           @type node: string
           @param node: Node name
           @type instance: C{objects.Instance}
           @param instance: Instance object
           @type component: string
           @param component: which part of the instance is being imported
           """
           return self._SingleNodeCall(node, "import_start",
                                       [opts.ToDict(),
                                        self._InstDict(instance), component, dest,
                                        _EncodeImportExportIO(dest, dest_args)])
         @_RpcTimeout(_TMO_NORMAL)
         def call_export_start(self, node, opts, host, port,
                               instance, component, source, source_args):
           """Starts an export daemon.
           This is a single-node call.
           @type node: string
           @param node: Node name
           @type instance: C{objects.Instance}
           @param instance: Instance object
           @type component: string
           @param component: which part of the instance is being imported
           """
           return self._SingleNodeCall(node, "export_start",
                                       [opts.ToDict(), host, port,
                                        self._InstDict(instance),
                                        component, source,
                                        _EncodeImportExportIO(source, source_args)])
         @_RpcTimeout(_TMO_FAST)
         def call_impexp_status(self, node, names):
           """Gets the status of an import or export.
           This is a single-node call.
           @type node: string
           @param node: Node name
           @type names: List of strings
           @param names: Import/export names
           @rtype: List of L{objects.ImportExportStatus} instances
           @return: Returns a list of the state of each named import/export or None if
                    a status couldn't be retrieved
           """
           result = self._SingleNodeCall(node, "impexp_status", [names])
           if not result.fail_msg:
             decoded = []
             for i in result.payload:
               if i is None:
                 decoded.append(None)
                 continue
               decoded.append(objects.ImportExportStatus.FromDict(i))
             result.payload = decoded
           return result
         @_RpcTimeout(_TMO_NORMAL)
         def call_impexp_abort(self, node, name):
           """Aborts an import or export.
           This is a single-node call.
           @type node: string
           @param node: Node name
           @type name: string
           @param name: Import/export name
           """
           return self._SingleNodeCall(node, "impexp_abort", [name])
         @_RpcTimeout(_TMO_NORMAL)
         def call_impexp_cleanup(self, node, name):
           """Cleans up after an import or export.
           This is a single-node call.
           @type node: string
           @param node: Node name
           @type name: string
           @param name: Import/export name
           """
           return self._SingleNodeCall(node, "impexp_cleanup", [name])

Synnefo » snf-ganeti » ganeti-local

root / lib / rpc.py @ a629ecb9