X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/62c9ec9297bffb3e9054cdf665ad8e24a3a4d796..ec596c24f343013471313ebb05c17581b2f1d970:/lib/rpc.py diff --git a/lib/rpc.py b/lib/rpc.py index 14a6185..a9619f9 100644 --- a/lib/rpc.py +++ b/lib/rpc.py @@ -19,68 +19,109 @@ # 02110-1301, USA. -"""Script to show add a new node to the cluster +"""Inter-node RPC library. """ -# pylint: disable-msg=C0103 +# pylint: disable-msg=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 socket -import httplib +import logging +import zlib +import base64 -import simplejson - -from ganeti import logger from ganeti import utils from ganeti import objects +from ganeti import http +from ganeti import serializer +from ganeti import constants +from ganeti import errors + +import ganeti.http.client + + +# Module level variable +_http_manager = None + + +def Init(): + """Initializes the module-global HTTP client manager. + + Must be called before using any RPC function. + + """ + global _http_manager + + assert not _http_manager, "RPC module initialized more than once" + + _http_manager = http.client.HttpClientManager() -class NodeController: - """Node-handling class. +def Shutdown(): + """Stops the module-global HTTP client manager. - For each node that we speak with, we create an instance of this - class, so that we have a safe place to store the details of this - individual call. + Must be called before quitting the program. """ - def __init__(self, parent, node): - self.parent = parent + global _http_manager + + if _http_manager: + _http_manager.Shutdown() + _http_manager = None + + +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 successfull results, or None + @type failed: boolean + @ivar failed: whether the operation failed at RPC level (not + application level on the remote node) + @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 + + """ + def __init__(self, data=None, failed=False, offline=False, + call=None, node=None): + self.failed = failed + self.offline = offline + self.call = call self.node = node - self.failed = False - - self.http_conn = hc = httplib.HTTPConnection(node, self.parent.port) - try: - hc.connect() - hc.putrequest('PUT', "/%s" % self.parent.procedure, - skip_accept_encoding=True) - hc.putheader('Content-Length', str(len(parent.body))) - hc.endheaders() - hc.send(parent.body) - except socket.error, err: - logger.Error("Error connecting to %s: %s" % (node, str(err))) + if offline: self.failed = True + self.error = "Node is marked offline" + self.data = None + elif failed: + self.error = data + self.data = None + else: + self.data = data + self.error = None - def get_response(self): - """Try to process the response from the node. + def Raise(self): + """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 self.failed: - # we already failed in connect - return False - resp = self.http_conn.getresponse() - if resp.status != 200: - return False - try: - length = int(resp.getheader('Content-Length', '0')) - except ValueError: - return False - if not length: - logger.Error("Zero-length reply from %s" % self.node) - return False - payload = resp.read(length) - unload = simplejson.loads(payload) - return unload + raise errors.OpExecError("Call '%s' to node '%s' has failed: %s" % + (self.call, self.node, self.error)) class Client: @@ -95,758 +136,851 @@ class Client: cause bugs. """ - result_set = False - result = False - allresult = [] - - def __init__(self, procedure, args): - self.port = utils.GetNodeDaemonPort() - self.nodepw = utils.GetNodeDaemonPassword() - self.nc = {} - self.results = {} + def __init__(self, procedure, body, port): self.procedure = procedure - self.args = args - self.body = simplejson.dumps(args) + self.body = body + self.port = port + self.nc = {} - #--- generic connector ------------- + self._ssl_params = \ + http.HttpSslParams(ssl_key_path=constants.SSL_CERT_FILE, + ssl_cert_path=constants.SSL_CERT_FILE) - def connect_list(self, node_list): + def ConnectList(self, node_list, address_list=None): """Add a list of nodes to the target nodes. + @type node_list: list + @param node_list: the list of node names to connect + @type address_list: list or None + @keyword address_list: either None or a list with node addresses, + which must have the same length as the node list + """ - for node in node_list: - self.connect(node) + if address_list is None: + address_list = [None for _ in node_list] + else: + assert len(node_list) == len(address_list), \ + "Name and address lists should have the same length" + for node, address in zip(node_list, address_list): + self.ConnectNode(node, address) - def connect(self, connect_node): + def ConnectNode(self, name, address=None): """Add a node to the target list. + @type name: str + @param name: the node name + @type address: str + @keyword address: the node address, if known + """ - self.nc[connect_node] = nc = NodeController(self, connect_node) + if address is None: + address = name + + self.nc[name] = \ + http.client.HttpClientRequest(address, self.port, http.HTTP_PUT, + "/%s" % self.procedure, + post_data=self.body, + ssl_params=self._ssl_params, + ssl_verify_peer=True) - def getresult(self): - """Return the results of the call. + def GetResults(self): + """Call nodes and return results. + + @rtype: list + @returns: List of RPC results """ - return self.results + assert _http_manager, "RPC module not intialized" - def run(self): - """Wrapper over reactor.run(). + _http_manager.ExecRequests(self.nc.values()) - This function simply calls reactor.run() if we have any requests - queued, otherwise it does nothing. + results = {} - """ - for node, nc in self.nc.items(): - self.results[node] = nc.get_response() + for name, req in self.nc.iteritems(): + if req.success and req.resp_status_code == http.HTTP_OK: + results[name] = RpcResult(data=serializer.LoadJson(req.resp_body), + node=name, call=self.procedure) + continue + # TODO: Better error reporting + if req.error: + msg = req.error + else: + msg = req.resp_body -def call_volume_list(node_list, vg_name): - """Gets the logical volumes present in a given volume group. + logging.error("RPC error from node %s: %s", name, msg) + results[name] = RpcResult(data=msg, failed=True, node=name, + call=self.procedure) - This is a multi-node call. + return results - """ - c = Client("volume_list", [vg_name]) - c.connect_list(node_list) - c.run() - return c.getresult() +class RpcRunner(object): + """RPC runner class""" -def call_vg_list(node_list): - """Gets the volume group list. + def __init__(self, cfg): + """Initialized the rpc runner. - This is a multi-node call. + @type cfg: C{config.ConfigWriter} + @param cfg: the configuration object that will be used to get data + about the cluster - """ - c = Client("vg_list", []) - c.connect_list(node_list) - c.run() - return c.getresult() + """ + self._cfg = cfg + self.port = utils.GetNodeDaemonPort() + def _InstDict(self, instance): + """Convert the given instance to a dict. -def call_bridges_exist(node, bridges_list): - """Checks if a node has all the bridges given. + This is done via the instance's ToDict() method and additionally + we fill the hvparams with the cluster defaults. - 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. + @type instance: L{objects.Instance} + @param instance: an Instance object + @rtype: dict + @return: the instance dict, with the hvparams filled with the + cluster defaults - This is a single-node call. + """ + idict = instance.ToDict() + cluster = self._cfg.GetClusterInfo() + idict["hvparams"] = cluster.FillHV(instance) + idict["beparams"] = cluster.FillBE(instance) + return idict - """ - c = Client("bridges_exist", [bridges_list]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + def _ConnectList(self, client, node_list): + """Helper for computing node addresses. + @type client: L{Client} + @param client: a C{Client} instance + @type node_list: list + @param node_list: the node list we should connect -def call_instance_start(node, instance, extra_args): - """Starts an instance. + """ + all_nodes = self._cfg.GetAllNodesInfo() + name_list = [] + addr_list = [] + skip_dict = {} + for node in node_list: + if node in all_nodes: + if all_nodes[node].offline: + skip_dict[node] = RpcResult(node=node, offline=True) + continue + val = all_nodes[node].primary_ip + else: + val = None + addr_list.append(val) + name_list.append(node) + if name_list: + client.ConnectList(name_list, address_list=addr_list) + return skip_dict + + def _ConnectNode(self, client, node): + """Helper for computing one node's address. + + @type client: L{Client} + @param client: a C{Client} instance + @type node: str + @param node: the node we should connect - This is a single-node call. + """ + node_info = self._cfg.GetNodeInfo(node) + if node_info is not None: + if node_info.offline: + return RpcResult(node=node, offline=True) + addr = node_info.primary_ip + else: + addr = None + client.ConnectNode(node, address=addr) - """ - c = Client("instance_start", [instance.ToDict(), extra_args]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + def _MultiNodeCall(self, node_list, procedure, args): + """Helper for making a multi-node call + """ + body = serializer.DumpJson(args, indent=False) + c = Client(procedure, body, self.port) + skip_dict = self._ConnectList(c, node_list) + skip_dict.update(c.GetResults()) + return skip_dict -def call_instance_shutdown(node, instance): - """Stops an instance. + @classmethod + def _StaticMultiNodeCall(cls, node_list, procedure, args, + address_list=None): + """Helper for making a multi-node static call - This is a single-node call. + """ + body = serializer.DumpJson(args, indent=False) + c = Client(procedure, body, utils.GetNodeDaemonPort()) + c.ConnectList(node_list, address_list=address_list) + return c.GetResults() - """ - c = Client("instance_shutdown", [instance.ToDict()]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + def _SingleNodeCall(self, node, procedure, args): + """Helper for making a single-node call + """ + body = serializer.DumpJson(args, indent=False) + c = Client(procedure, body, self.port) + result = self._ConnectNode(c, node) + if result is None: + # we did connect, node is not offline + result = c.GetResults()[node] + return result -def call_instance_migrate(node, instance, target, live): - """Migrate an instance. + @classmethod + def _StaticSingleNodeCall(cls, node, procedure, args): + """Helper for making a single-node static call - This is a single-node call. + """ + body = serializer.DumpJson(args, indent=False) + c = Client(procedure, body, utils.GetNodeDaemonPort()) + c.ConnectNode(node) + return c.GetResults()[node] - """ - c = Client("instance_migrate", [instance.name, target, live]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + @staticmethod + def _Compress(data): + """Compresses a string for transport over RPC. + Small amounts of data are not compressed. -def call_instance_reboot(node, instance, reboot_type, extra_args): - """Reboots an instance. + @type data: str + @param data: Data + @rtype: tuple + @return: Encoded data to send - This is a single-node call. + """ + # Small amounts of data are not compressed + if len(data) < 512: + return (constants.RPC_ENCODING_NONE, data) - """ - c = Client("instance_reboot", [instance.ToDict(), reboot_type, extra_args]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + # Compress with zlib and encode in base64 + return (constants.RPC_ENCODING_ZLIB_BASE64, + base64.b64encode(zlib.compress(data, 3))) + # + # Begin RPC calls + # -def call_instance_os_add(node, inst, osdev, swapdev): - """Installs an OS on the given instance. + def call_volume_list(self, node_list, vg_name): + """Gets the logical volumes present in a given volume group. - This is a single-node call. + This is a multi-node call. - """ - params = [inst.ToDict(), osdev, swapdev] - c = Client("instance_os_add", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return self._MultiNodeCall(node_list, "volume_list", [vg_name]) + def call_vg_list(self, node_list): + """Gets the volume group list. -def call_instance_run_rename(node, inst, old_name, osdev, swapdev): - """Run the OS rename script for an instance. + This is a multi-node call. - This is a single-node call. + """ + return self._MultiNodeCall(node_list, "vg_list", []) - """ - params = [inst.ToDict(), old_name, osdev, swapdev] - c = Client("instance_run_rename", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + 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. -def call_instance_info(node, instance): - """Returns information about a single instance. + This is a single-node call. - This is a single-node call. + """ + return self._SingleNodeCall(node, "bridges_exist", [bridges_list]) - """ - c = Client("instance_info", [instance]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + def call_instance_start(self, node, instance, extra_args): + """Starts an instance. + This is a single-node call. -def call_all_instances_info(node_list): - """Returns information about all instances on a given node. + """ + return self._SingleNodeCall(node, "instance_start", + [self._InstDict(instance), extra_args]) - This is a single-node call. + def call_instance_shutdown(self, node, instance): + """Stops an instance. - """ - c = Client("all_instances_info", []) - c.connect_list(node_list) - c.run() - return c.getresult() + This is a single-node call. + """ + return self._SingleNodeCall(node, "instance_shutdown", + [self._InstDict(instance)]) -def call_instance_list(node_list): - """Returns the list of running instances on a given node. + def call_instance_migrate(self, node, instance, target, live): + """Migrate an instance. - This is a single-node call. + This is a single-node call. - """ - c = Client("instance_list", []) - c.connect_list(node_list) - c.run() - return c.getresult() + @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]) -def call_node_tcp_ping(node, source, target, port, timeout, live_port_needed): - """Do a TcpPing on the remote node + def call_instance_reboot(self, node, instance, reboot_type, extra_args): + """Reboots an instance. - This is a single-node call. - """ - c = Client("node_tcp_ping", [source, target, port, timeout, - live_port_needed]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a single-node call. + """ + return self._SingleNodeCall(node, "instance_reboot", + [self._InstDict(instance), reboot_type, + extra_args]) -def call_node_info(node_list, vg_name): - """Return node information. + def call_instance_os_add(self, node, inst): + """Installs an OS on the given instance. - This will return memory information and volume group size and free - space. + This is a single-node call. - This is a multi-node call. + """ + return self._SingleNodeCall(node, "instance_os_add", + [self._InstDict(inst)]) - """ - c = Client("node_info", [vg_name]) - c.connect_list(node_list) - c.run() - retux = c.getresult() + def call_instance_run_rename(self, node, inst, old_name): + """Run the OS rename script for an instance. - for node_name in retux: - ret = retux.get(node_name, False) - if type(ret) != dict: - logger.Error("could not connect to node %s" % (node_name)) - ret = {} + This is a single-node call. - utils.CheckDict(ret, - { 'memory_total' : '-', - 'memory_dom0' : '-', - 'memory_free' : '-', - 'vg_size' : 'node_unreachable', - 'vg_free' : '-' }, - "call_node_info", - ) - return retux + """ + return self._SingleNodeCall(node, "instance_run_rename", + [self._InstDict(inst), old_name]) + def call_instance_info(self, node, instance, hname): + """Returns information about a single instance. -def call_node_add(node, dsa, dsapub, rsa, rsapub, ssh, sshpub): - """Add a node to the cluster. + This is a single-node call. - 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 - """ - params = [dsa, dsapub, rsa, rsapub, ssh, sshpub] - c = Client("node_add", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return self._SingleNodeCall(node, "instance_info", [instance, hname]) + def call_all_instances_info(self, node_list, hypervisor_list): + """Returns information about all instances on the given nodes. -def call_node_verify(node_list, checkdict, cluster_name): - """Request verification of given parameters. + This is a multi-node call. - 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 - """ - c = Client("node_verify", [checkdict, cluster_name]) - c.connect_list(node_list) - c.run() - return c.getresult() + """ + return self._MultiNodeCall(node_list, "all_instances_info", + [hypervisor_list]) + def call_instance_list(self, node_list, hypervisor_list): + """Returns the list of running instances on a given node. -def call_node_start_master(node, start_daemons): - """Tells a node to activate itself as a master. + This is a multi-node call. - This is a single-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 - """ - c = Client("node_start_master", [start_daemons]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return self._MultiNodeCall(node_list, "instance_list", [hypervisor_list]) + def call_node_tcp_ping(self, node, source, target, port, timeout, + live_port_needed): + """Do a TcpPing on the remote node -def call_node_stop_master(node, stop_daemons): - """Tells a node to demote itself from master status. + This is a single-node call. - This is a single-node call. + """ + return self._SingleNodeCall(node, "node_tcp_ping", + [source, target, port, timeout, + live_port_needed]) - """ - c = Client("node_stop_master", [stop_daemons]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + def call_node_has_ip_address(self, node, address): + """Checks if a node has the given IP address. + This is a single-node call. -def call_master_info(node_list): - """Query master info. + """ + return self._SingleNodeCall(node, "node_has_ip_address", [address]) - This is a multi-node call. + def call_node_info(self, node_list, vg_name, hypervisor_type): + """Return node information. - """ - c = Client("master_info", []) - c.connect_list(node_list) - c.run() - return c.getresult() + This will return memory information and volume group size and free + space. + This is a multi-node call. -def call_version(node_list): - """Query node version. + @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 - This is a multi-node call. + """ + retux = self._MultiNodeCall(node_list, "node_info", + [vg_name, hypervisor_type]) - """ - c = Client("version", []) - c.connect_list(node_list) - c.run() - return c.getresult() + for result in retux.itervalues(): + if result.failed or not isinstance(result.data, dict): + result.data = {} + utils.CheckDict(result.data, { + 'memory_total' : '-', + 'memory_dom0' : '-', + 'memory_free' : '-', + 'vg_size' : 'node_unreachable', + 'vg_free' : '-', + }, "call_node_info") + return retux -def call_blockdev_create(node, bdev, size, owner, on_primary, info): - """Request creation of a given block device. + def call_node_add(self, node, dsa, dsapub, rsa, rsapub, ssh, sshpub): + """Add a node to the cluster. - This is a single-node call. + This is a single-node call. - """ - params = [bdev.ToDict(), size, owner, on_primary, info] - c = Client("blockdev_create", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return self._SingleNodeCall(node, "node_add", + [dsa, dsapub, rsa, rsapub, ssh, sshpub]) + def call_node_verify(self, node_list, checkdict, cluster_name): + """Request verification of given parameters. -def call_blockdev_remove(node, bdev): - """Request removal of a given block device. + This is a multi-node call. - This is a single-node call. + """ + return self._MultiNodeCall(node_list, "node_verify", + [checkdict, cluster_name]) - """ - c = Client("blockdev_remove", [bdev.ToDict()]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + @classmethod + def call_node_start_master(cls, node, start_daemons): + """Tells a node to activate itself as a master. + This is a single-node call. -def call_blockdev_rename(node, devlist): - """Request rename of the given block devices. + """ + return cls._StaticSingleNodeCall(node, "node_start_master", + [start_daemons]) - This is a single-node call. + @classmethod + def call_node_stop_master(cls, node, stop_daemons): + """Tells a node to demote itself from master status. - """ - params = [(d.ToDict(), uid) for d, uid in devlist] - c = Client("blockdev_rename", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a single-node call. + """ + return cls._StaticSingleNodeCall(node, "node_stop_master", [stop_daemons]) -def call_blockdev_assemble(node, disk, owner, on_primary): - """Request assembling of a given block device. + @classmethod + def call_master_info(cls, node_list): + """Query master info. - This is a single-node call. + This is a multi-node call. - """ - params = [disk.ToDict(), owner, on_primary] - c = Client("blockdev_assemble", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + # TODO: should this method query down nodes? + return cls._StaticMultiNodeCall(node_list, "master_info", []) + def call_version(self, node_list): + """Query node version. -def call_blockdev_shutdown(node, disk): - """Request shutdown of a given block device. + This is a multi-node call. - This is a single-node call. + """ + return self._MultiNodeCall(node_list, "version", []) - """ - c = Client("blockdev_shutdown", [disk.ToDict()]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + 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. -def call_blockdev_addchildren(node, bdev, ndevs): - """Request adding a list of children to a (mirroring) device. + """ + return self._SingleNodeCall(node, "blockdev_create", + [bdev.ToDict(), size, owner, on_primary, info]) - This is a single-node call. + def call_blockdev_remove(self, node, bdev): + """Request removal of a given block device. - """ - params = [bdev.ToDict(), [disk.ToDict() for disk in ndevs]] - c = Client("blockdev_addchildren", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a single-node call. + """ + return self._SingleNodeCall(node, "blockdev_remove", [bdev.ToDict()]) -def call_blockdev_removechildren(node, bdev, ndevs): - """Request removing a list of children from a (mirroring) device. + def call_blockdev_rename(self, node, devlist): + """Request rename of the given block devices. - This is a single-node call. + This is a single-node call. - """ - params = [bdev.ToDict(), [disk.ToDict() for disk in ndevs]] - c = Client("blockdev_removechildren", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return self._SingleNodeCall(node, "blockdev_rename", + [(d.ToDict(), uid) for d, uid in devlist]) + def call_blockdev_assemble(self, node, disk, owner, on_primary): + """Request assembling of a given block device. -def call_blockdev_getmirrorstatus(node, disks): - """Request status of a (mirroring) device. + This is a single-node call. - This is a single-node call. + """ + return self._SingleNodeCall(node, "blockdev_assemble", + [disk.ToDict(), owner, on_primary]) - """ - params = [dsk.ToDict() for dsk in disks] - c = Client("blockdev_getmirrorstatus", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + def call_blockdev_shutdown(self, node, disk): + """Request shutdown of a given block device. + This is a single-node call. -def call_blockdev_find(node, disk): - """Request identification of a given block device. + """ + return self._SingleNodeCall(node, "blockdev_shutdown", [disk.ToDict()]) - This is a single-node call. + def call_blockdev_addchildren(self, node, bdev, ndevs): + """Request adding a list of children to a (mirroring) device. - """ - c = Client("blockdev_find", [disk.ToDict()]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a single-node call. + """ + return self._SingleNodeCall(node, "blockdev_addchildren", + [bdev.ToDict(), + [disk.ToDict() for disk in ndevs]]) -def call_blockdev_close(node, disks): - """Closes the given block devices. + def call_blockdev_removechildren(self, node, bdev, ndevs): + """Request removing a list of children from a (mirroring) device. - This is a single-node call. + This is a single-node call. - """ - params = [cf.ToDict() for cf in disks] - c = Client("blockdev_close", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return self._SingleNodeCall(node, "blockdev_removechildren", + [bdev.ToDict(), + [disk.ToDict() for disk in ndevs]]) + def call_blockdev_getmirrorstatus(self, node, disks): + """Request status of a (mirroring) device. -def call_upload_file(node_list, file_name): - """Upload a file. + This is a single-node call. - The node will refuse the operation in case the file is not on the - approved file list. + """ + return self._SingleNodeCall(node, "blockdev_getmirrorstatus", + [dsk.ToDict() for dsk in disks]) - This is a multi-node call. + def call_blockdev_find(self, node, disk): + """Request identification of a given block device. - """ - fh = file(file_name) - try: - data = fh.read() - finally: - fh.close() - st = os.stat(file_name) - params = [file_name, data, st.st_mode, st.st_uid, st.st_gid, - st.st_atime, st.st_mtime] - c = Client("upload_file", params) - c.connect_list(node_list) - c.run() - return c.getresult() + This is a single-node call. + """ + return self._SingleNodeCall(node, "blockdev_find", [disk.ToDict()]) -def call_os_diagnose(node_list): - """Request a diagnose of OS definitions. + def call_blockdev_close(self, node, disks): + """Closes the given block devices. - This is a multi-node call. + This is a single-node call. - """ - c = Client("os_diagnose", []) - c.connect_list(node_list) - c.run() - result = c.getresult() - new_result = {} - for node_name in result: - if result[node_name]: - nr = [objects.OS.FromDict(oss) for oss in result[node_name]] - else: - nr = [] - new_result[node_name] = nr - return new_result + """ + return self._SingleNodeCall(node, "blockdev_close", + [cf.ToDict() for cf in disks]) + @classmethod + def call_upload_file(cls, node_list, file_name, address_list=None): + """Upload a file. -def call_os_get(node, name): - """Returns an OS definition. + The node will refuse the operation in case the file is not on the + approved file list. - This is a single-node call. + This is a multi-node call. - """ - c = Client("os_get", [name]) - c.connect(node) - c.run() - result = c.getresult().get(node, False) - if isinstance(result, dict): - return objects.OS.FromDict(result) - else: - return result + @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 = cls._Compress(file_contents) + st = os.stat(file_name) + params = [file_name, data, st.st_mode, st.st_uid, st.st_gid, + st.st_atime, st.st_mtime] + return cls._StaticMultiNodeCall(node_list, "upload_file", params, + address_list=address_list) -def call_hooks_runner(node_list, hpath, phase, env): - """Call the hooks runner. + @classmethod + def call_write_ssconf_files(cls, node_list, values): + """Write ssconf files. - Args: - - op: the OpCode instance - - env: a dictionary with the environment + This is a multi-node call. - This is a multi-node call. + """ + return cls._StaticMultiNodeCall(node_list, "write_ssconf_files", [values]) - """ - params = [hpath, phase, env] - c = Client("hooks_runner", params) - c.connect_list(node_list) - c.run() - result = c.getresult() - return result + def call_os_diagnose(self, node_list): + """Request a diagnose of OS definitions. + This is a multi-node call. -def call_iallocator_runner(node, name, idata): - """Call an iallocator on a remote node + """ + result = self._MultiNodeCall(node_list, "os_diagnose", []) - Args: - - name: the iallocator name - - input: the json-encoded input string + for node_result in result.values(): + if not node_result.failed and node_result.data: + node_result.data = [objects.OS.FromDict(oss) + for oss in node_result.data] + return result - This is a single-node call. + def call_os_get(self, node, name): + """Returns an OS definition. - """ - params = [name, idata] - c = Client("iallocator_runner", params) - c.connect(node) - c.run() - result = c.getresult().get(node, False) - return result + This is a single-node call. + """ + result = self._SingleNodeCall(node, "os_get", [name]) + if not result.failed and isinstance(result.data, dict): + result.data = objects.OS.FromDict(result.data) + return result -def call_blockdev_grow(node, cf_bdev, amount): - """Request a snapshot of the given block device. + def call_hooks_runner(self, node_list, hpath, phase, env): + """Call the hooks runner. - This is a single-node call. + Args: + - op: the OpCode instance + - env: a dictionary with the environment - """ - c = Client("blockdev_grow", [cf_bdev.ToDict(), amount]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a multi-node call. + """ + params = [hpath, phase, env] + return self._MultiNodeCall(node_list, "hooks_runner", params) -def call_blockdev_snapshot(node, cf_bdev): - """Request a snapshot of the given block device. + def call_iallocator_runner(self, node, name, idata): + """Call an iallocator on a remote node - This is a single-node call. + Args: + - name: the iallocator name + - input: the json-encoded input string - """ - c = Client("blockdev_snapshot", [cf_bdev.ToDict()]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a single-node call. + """ + return self._SingleNodeCall(node, "iallocator_runner", [name, idata]) -def call_snapshot_export(node, snap_bdev, dest_node, instance, cluster_name): - """Request the export of a given snapshot. + def call_blockdev_grow(self, node, cf_bdev, amount): + """Request a snapshot of the given block device. - This is a single-node call. + This is a single-node call. - """ - params = [snap_bdev.ToDict(), dest_node, instance.ToDict(), cluster_name] - c = Client("snapshot_export", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return self._SingleNodeCall(node, "blockdev_grow", + [cf_bdev.ToDict(), amount]) + def call_blockdev_snapshot(self, node, cf_bdev): + """Request a snapshot of the given block device. -def call_finalize_export(node, instance, snap_disks): - """Request the completion of an export operation. + This is a single-node call. - This writes the export config file, etc. + """ + return self._SingleNodeCall(node, "blockdev_snapshot", [cf_bdev.ToDict()]) - This is a single-node call. + def call_snapshot_export(self, node, snap_bdev, dest_node, instance, + cluster_name, idx): + """Request the export of a given snapshot. - """ - flat_disks = [] - for disk in snap_disks: - flat_disks.append(disk.ToDict()) - params = [instance.ToDict(), flat_disks] - c = Client("finalize_export", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a single-node call. + """ + return self._SingleNodeCall(node, "snapshot_export", + [snap_bdev.ToDict(), dest_node, + self._InstDict(instance), cluster_name, idx]) -def call_export_info(node, path): - """Queries the export information in a given path. + def call_finalize_export(self, node, instance, snap_disks): + """Request the completion of an export operation. - This is a single-node call. + This writes the export config file, etc. - """ - c = Client("export_info", [path]) - c.connect(node) - c.run() - result = c.getresult().get(node, False) - if not result: - return result - return objects.SerializableConfigParser.Loads(str(result)) + This is a single-node call. + """ + flat_disks = [] + for disk in snap_disks: + flat_disks.append(disk.ToDict()) -def call_instance_os_import(node, inst, osdev, swapdev, - src_node, src_image, cluster_name): - """Request the import of a backup into an instance. + return self._SingleNodeCall(node, "finalize_export", + [self._InstDict(instance), flat_disks]) - This is a single-node call. + def call_export_info(self, node, path): + """Queries the export information in a given path. - """ - params = [inst.ToDict(), osdev, swapdev, src_node, src_image, cluster_name] - c = Client("instance_os_import", params) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a single-node call. + + """ + result = self._SingleNodeCall(node, "export_info", [path]) + if not result.failed and result.data: + result.data = objects.SerializableConfigParser.Loads(str(result.data)) + return result + def call_instance_os_import(self, node, inst, src_node, src_images, + cluster_name): + """Request the import of a backup into an instance. -def call_export_list(node_list): - """Gets the stored exports list. + This is a single-node call. - This is a multi-node call. + """ + return self._SingleNodeCall(node, "instance_os_import", + [self._InstDict(inst), src_node, src_images, + cluster_name]) - """ - c = Client("export_list", []) - c.connect_list(node_list) - c.run() - result = c.getresult() - return result + def call_export_list(self, node_list): + """Gets the stored exports list. + This is a multi-node call. -def call_export_remove(node, export): - """Requests removal of a given export. + """ + return self._MultiNodeCall(node_list, "export_list", []) - This is a single-node call. + def call_export_remove(self, node, export): + """Requests removal of a given export. - """ - c = Client("export_remove", [export]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a single-node call. + """ + return self._SingleNodeCall(node, "export_remove", [export]) -def call_node_leave_cluster(node): - """Requests a node to clean the cluster information it has. + @classmethod + def call_node_leave_cluster(cls, node): + """Requests a node to clean the cluster information it has. - This will remove the configuration information from the ganeti data - dir. + This will remove the configuration information from the ganeti data + dir. - This is a single-node call. + This is a single-node call. - """ - c = Client("node_leave_cluster", []) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return cls._StaticSingleNodeCall(node, "node_leave_cluster", []) + def call_node_volumes(self, node_list): + """Gets all volumes on node(s). -def call_node_volumes(node_list): - """Gets all volumes on node(s). + This is a multi-node call. - This is a multi-node call. + """ + return self._MultiNodeCall(node_list, "node_volumes", []) - """ - c = Client("node_volumes", []) - c.connect_list(node_list) - c.run() - return c.getresult() + def call_node_demote_from_mc(self, node): + """Demote a node from the master candidate role. + This is a single-node call. -def call_test_delay(node_list, duration): - """Sleep for a fixed time on given node(s). + """ + return self._SingleNodeCall(node, "node_demote_from_mc", []) - This is a multi-node call. + def call_test_delay(self, node_list, duration): + """Sleep for a fixed time on given node(s). - """ - c = Client("test_delay", [duration]) - c.connect_list(node_list) - c.run() - return c.getresult() + This is a multi-node call. + """ + return self._MultiNodeCall(node_list, "test_delay", [duration]) -def call_file_storage_dir_create(node, file_storage_dir): - """Create the given file storage directory. + def call_file_storage_dir_create(self, node, file_storage_dir): + """Create the given file storage directory. - This is a single-node call. + This is a single-node call. - """ - c = Client("file_storage_dir_create", [file_storage_dir]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + """ + return self._SingleNodeCall(node, "file_storage_dir_create", + [file_storage_dir]) + def call_file_storage_dir_remove(self, node, file_storage_dir): + """Remove the given file storage directory. -def call_file_storage_dir_remove(node, file_storage_dir): - """Remove the given file storage directory. + This is a single-node call. - This is a single-node call. + """ + return self._SingleNodeCall(node, "file_storage_dir_remove", + [file_storage_dir]) - """ - c = Client("file_storage_dir_remove", [file_storage_dir]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + 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. -def call_file_storage_dir_rename(node, old_file_storage_dir, - new_file_storage_dir): - """Rename file storage directory. + """ + return self._SingleNodeCall(node, "file_storage_dir_rename", + [old_file_storage_dir, new_file_storage_dir]) - This is a single-node call. + @classmethod + def call_jobqueue_update(cls, node_list, address_list, file_name, content): + """Update job queue. - """ - c = Client("file_storage_dir_rename", - [old_file_storage_dir, new_file_storage_dir]) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a multi-node call. + + """ + return cls._StaticMultiNodeCall(node_list, "jobqueue_update", + [file_name, cls._Compress(content)], + address_list=address_list) + @classmethod + def call_jobqueue_purge(cls, node): + """Purge job queue. -def call_jobqueue_update(node_list, file_name, content): - """Update job queue. + This is a single-node call. - This is a multi-node call. + """ + return cls._StaticSingleNodeCall(node, "jobqueue_purge", []) - """ - c = Client("jobqueue_update", [file_name, content]) - c.connect_list(node_list) - c.run() - result = c.getresult() - return result + @classmethod + def call_jobqueue_rename(cls, node_list, address_list, rename): + """Rename a job queue file. + This is a multi-node call. -def call_jobqueue_purge(node): - """Purge job queue. + """ + return cls._StaticMultiNodeCall(node_list, "jobqueue_rename", rename, + address_list=address_list) - This is a single-node call. + @classmethod + def call_jobqueue_set_drain(cls, node_list, drain_flag): + """Set the drain flag on the queue. - """ - c = Client("jobqueue_purge", []) - c.connect(node) - c.run() - return c.getresult().get(node, False) + This is a multi-node call. + @type node_list: list + @param node_list: the list of nodes to query + @type drain_flag: bool + @param drain_flag: if True, will set the drain flag, otherwise reset it. -def call_jobqueue_rename(node_list, old, new): - """Rename a job queue file. + """ + return cls._StaticMultiNodeCall(node_list, "jobqueue_set_drain", + [drain_flag]) - This is a multi-node call. + def call_hypervisor_validate_params(self, node_list, hvname, hvparams): + """Validate the hypervisor params. - """ - c = Client("jobqueue_rename", [old, new]) - c.connect_list(node_list) - c.run() - result = c.getresult() - return result + 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 = cluster.FillDict(cluster.hvparams.get(hvname, {}), hvparams) + return self._MultiNodeCall(node_list, "hypervisor_validate_params", + [hvname, hv_full])