root / lib / cmdlib / network.py @ fbeb41e6
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#
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# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""Logical units dealing with networks."""
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import locking |
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from ganeti import network |
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from ganeti import objects |
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from ganeti import query |
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from ganeti import utils |
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from ganeti.cmdlib.base import LogicalUnit, NoHooksLU, QueryBase |
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from ganeti.cmdlib.common import CheckNodeGroupInstances |
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def _BuildNetworkHookEnv(name, subnet, gateway, network6, gateway6, |
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mac_prefix, tags): |
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"""Builds network related env variables for hooks
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This builds the hook environment from individual variables.
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@type name: string
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@param name: the name of the network
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@type subnet: string
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@param subnet: the ipv4 subnet
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@type gateway: string
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@param gateway: the ipv4 gateway
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@type network6: string
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@param network6: the ipv6 subnet
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@type gateway6: string
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@param gateway6: the ipv6 gateway
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@type mac_prefix: string
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@param mac_prefix: the mac_prefix
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@type tags: list
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@param tags: the tags of the network
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"""
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env = {} |
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if name:
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env["NETWORK_NAME"] = name
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if subnet:
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env["NETWORK_SUBNET"] = subnet
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if gateway:
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env["NETWORK_GATEWAY"] = gateway
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if network6:
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env["NETWORK_SUBNET6"] = network6
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if gateway6:
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env["NETWORK_GATEWAY6"] = gateway6
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if mac_prefix:
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env["NETWORK_MAC_PREFIX"] = mac_prefix
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if tags:
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env["NETWORK_TAGS"] = " ".join(tags) |
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return env
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class LUNetworkAdd(LogicalUnit): |
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"""Logical unit for creating networks.
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"""
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HPATH = "network-add"
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HTYPE = constants.HTYPE_NETWORK |
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REQ_BGL = False
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def BuildHooksNodes(self): |
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"""Build hooks nodes.
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"""
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mn = self.cfg.GetMasterNode()
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return ([mn], [mn])
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def CheckArguments(self): |
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if self.op.mac_prefix: |
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self.op.mac_prefix = \
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utils.NormalizeAndValidateThreeOctetMacPrefix(self.op.mac_prefix)
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def ExpandNames(self): |
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self.network_uuid = self.cfg.GenerateUniqueID(self.proc.GetECId()) |
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if self.op.conflicts_check: |
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self.share_locks[locking.LEVEL_NODE] = 1 |
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self.share_locks[locking.LEVEL_NODE_ALLOC] = 1 |
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self.needed_locks = {
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locking.LEVEL_NODE: locking.ALL_SET, |
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locking.LEVEL_NODE_ALLOC: locking.ALL_SET, |
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} |
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else:
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self.needed_locks = {}
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self.add_locks[locking.LEVEL_NETWORK] = self.network_uuid |
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def CheckPrereq(self): |
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if self.op.network is None: |
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raise errors.OpPrereqError("Network must be given", |
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errors.ECODE_INVAL) |
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try:
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existing_uuid = self.cfg.LookupNetwork(self.op.network_name) |
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except errors.OpPrereqError:
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pass
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else:
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raise errors.OpPrereqError("Desired network name '%s' already exists as a" |
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" network (UUID: %s)" %
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(self.op.network_name, existing_uuid),
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errors.ECODE_EXISTS) |
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# Check tag validity
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for tag in self.op.tags: |
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objects.TaggableObject.ValidateTag(tag) |
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def BuildHooksEnv(self): |
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"""Build hooks env.
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"""
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args = { |
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"name": self.op.network_name, |
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"subnet": self.op.network, |
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"gateway": self.op.gateway, |
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"network6": self.op.network6, |
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"gateway6": self.op.gateway6, |
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"mac_prefix": self.op.mac_prefix, |
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"tags": self.op.tags, |
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} |
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return _BuildNetworkHookEnv(**args) # pylint: disable=W0142 |
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def Exec(self, feedback_fn): |
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"""Add the ip pool to the cluster.
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"""
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nobj = objects.Network(name=self.op.network_name,
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network=self.op.network,
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gateway=self.op.gateway,
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network6=self.op.network6,
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gateway6=self.op.gateway6,
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mac_prefix=self.op.mac_prefix,
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uuid=self.network_uuid)
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# Initialize the associated address pool
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try:
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pool = network.AddressPool.InitializeNetwork(nobj) |
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except errors.AddressPoolError, err:
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raise errors.OpExecError("Cannot create IP address pool for network" |
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" '%s': %s" % (self.op.network_name, err)) |
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# Check if we need to reserve the nodes and the cluster master IP
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# These may not be allocated to any instances in routed mode, as
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# they wouldn't function anyway.
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if self.op.conflicts_check: |
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for node in self.cfg.GetAllNodesInfo().values(): |
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for ip in [node.primary_ip, node.secondary_ip]: |
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try:
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if pool.Contains(ip):
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pool.Reserve(ip) |
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self.LogInfo("Reserved IP address of node '%s' (%s)", |
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node.name, ip) |
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except errors.AddressPoolError, err:
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self.LogWarning("Cannot reserve IP address '%s' of node '%s': %s", |
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ip, node.name, err) |
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master_ip = self.cfg.GetClusterInfo().master_ip
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try:
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if pool.Contains(master_ip):
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pool.Reserve(master_ip) |
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self.LogInfo("Reserved cluster master IP address (%s)", master_ip) |
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except errors.AddressPoolError, err:
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self.LogWarning("Cannot reserve cluster master IP address (%s): %s", |
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master_ip, err) |
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if self.op.add_reserved_ips: |
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for ip in self.op.add_reserved_ips: |
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try:
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pool.Reserve(ip, external=True)
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except errors.AddressPoolError, err:
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raise errors.OpExecError("Cannot reserve IP address '%s': %s" % |
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(ip, err)) |
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if self.op.tags: |
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for tag in self.op.tags: |
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nobj.AddTag(tag) |
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self.cfg.AddNetwork(nobj, self.proc.GetECId(), check_uuid=False) |
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del self.remove_locks[locking.LEVEL_NETWORK] |
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class LUNetworkRemove(LogicalUnit): |
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HPATH = "network-remove"
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HTYPE = constants.HTYPE_NETWORK |
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REQ_BGL = False
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def ExpandNames(self): |
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self.network_uuid = self.cfg.LookupNetwork(self.op.network_name) |
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self.share_locks[locking.LEVEL_NODEGROUP] = 1 |
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self.needed_locks = {
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locking.LEVEL_NETWORK: [self.network_uuid],
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locking.LEVEL_NODEGROUP: locking.ALL_SET, |
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} |
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def CheckPrereq(self): |
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"""Check prerequisites.
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This checks that the given network name exists as a network, that is
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empty (i.e., contains no nodes), and that is not the last group of the
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cluster.
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"""
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# Verify that the network is not conncted.
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node_groups = [group.name |
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for group in self.cfg.GetAllNodeGroupsInfo().values() |
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if self.network_uuid in group.networks] |
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if node_groups:
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self.LogWarning("Network '%s' is connected to the following" |
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" node groups: %s" %
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(self.op.network_name,
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utils.CommaJoin(utils.NiceSort(node_groups)))) |
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raise errors.OpPrereqError("Network still connected", errors.ECODE_STATE) |
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def BuildHooksEnv(self): |
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"""Build hooks env.
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"""
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return {
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"NETWORK_NAME": self.op.network_name, |
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} |
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def BuildHooksNodes(self): |
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"""Build hooks nodes.
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"""
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mn = self.cfg.GetMasterNode()
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return ([mn], [mn])
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def Exec(self, feedback_fn): |
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"""Remove the network.
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"""
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try:
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self.cfg.RemoveNetwork(self.network_uuid) |
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except errors.ConfigurationError:
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raise errors.OpExecError("Network '%s' with UUID %s disappeared" % |
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(self.op.network_name, self.network_uuid)) |
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class LUNetworkSetParams(LogicalUnit): |
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"""Modifies the parameters of a network.
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"""
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HPATH = "network-modify"
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HTYPE = constants.HTYPE_NETWORK |
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REQ_BGL = False
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def CheckArguments(self): |
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if (self.op.gateway and |
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(self.op.add_reserved_ips or self.op.remove_reserved_ips)): |
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raise errors.OpPrereqError("Cannot modify gateway and reserved ips" |
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" at once", errors.ECODE_INVAL)
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def ExpandNames(self): |
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self.network_uuid = self.cfg.LookupNetwork(self.op.network_name) |
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self.needed_locks = {
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locking.LEVEL_NETWORK: [self.network_uuid],
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} |
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def CheckPrereq(self): |
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"""Check prerequisites.
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"""
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self.network = self.cfg.GetNetwork(self.network_uuid) |
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self.gateway = self.network.gateway |
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self.mac_prefix = self.network.mac_prefix |
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self.network6 = self.network.network6 |
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self.gateway6 = self.network.gateway6 |
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self.tags = self.network.tags |
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self.pool = network.AddressPool(self.network) |
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if self.op.gateway: |
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if self.op.gateway == constants.VALUE_NONE: |
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self.gateway = None |
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else:
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self.gateway = self.op.gateway |
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if self.pool.IsReserved(self.gateway): |
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raise errors.OpPrereqError("Gateway IP address '%s' is already" |
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" reserved" % self.gateway, |
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errors.ECODE_STATE) |
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if self.op.mac_prefix: |
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if self.op.mac_prefix == constants.VALUE_NONE: |
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self.mac_prefix = None |
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else:
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self.mac_prefix = \
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utils.NormalizeAndValidateThreeOctetMacPrefix(self.op.mac_prefix)
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if self.op.gateway6: |
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if self.op.gateway6 == constants.VALUE_NONE: |
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self.gateway6 = None |
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else:
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self.gateway6 = self.op.gateway6 |
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if self.op.network6: |
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if self.op.network6 == constants.VALUE_NONE: |
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self.network6 = None |
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else:
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self.network6 = self.op.network6 |
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def BuildHooksEnv(self): |
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"""Build hooks env.
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"""
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args = { |
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"name": self.op.network_name, |
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"subnet": self.network.network, |
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"gateway": self.gateway, |
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"network6": self.network6, |
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"gateway6": self.gateway6, |
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"mac_prefix": self.mac_prefix, |
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"tags": self.tags, |
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} |
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return _BuildNetworkHookEnv(**args) # pylint: disable=W0142 |
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def BuildHooksNodes(self): |
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"""Build hooks nodes.
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"""
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mn = self.cfg.GetMasterNode()
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return ([mn], [mn])
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def Exec(self, feedback_fn): |
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"""Modifies the network.
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"""
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#TODO: reserve/release via temporary reservation manager
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# extend cfg.ReserveIp/ReleaseIp with the external flag
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if self.op.gateway: |
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if self.gateway == self.network.gateway: |
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self.LogWarning("Gateway is already %s", self.gateway) |
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else:
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if self.gateway: |
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self.pool.Reserve(self.gateway, external=True) |
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if self.network.gateway: |
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self.pool.Release(self.network.gateway, external=True) |
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self.network.gateway = self.gateway |
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if self.op.add_reserved_ips: |
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for ip in self.op.add_reserved_ips: |
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try:
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if self.pool.IsReserved(ip): |
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self.LogWarning("IP address %s is already reserved", ip) |
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else:
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self.pool.Reserve(ip, external=True) |
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except errors.AddressPoolError, err:
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self.LogWarning("Cannot reserve IP address %s: %s", ip, err) |
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if self.op.remove_reserved_ips: |
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for ip in self.op.remove_reserved_ips: |
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if ip == self.network.gateway: |
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self.LogWarning("Cannot unreserve Gateway's IP") |
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continue
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try:
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if not self.pool.IsReserved(ip): |
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self.LogWarning("IP address %s is already unreserved", ip) |
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else:
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self.pool.Release(ip, external=True) |
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except errors.AddressPoolError, err:
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self.LogWarning("Cannot release IP address %s: %s", ip, err) |
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if self.op.mac_prefix: |
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self.network.mac_prefix = self.mac_prefix |
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if self.op.network6: |
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self.network.network6 = self.network6 |
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if self.op.gateway6: |
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self.network.gateway6 = self.gateway6 |
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self.pool.Validate()
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self.cfg.Update(self.network, feedback_fn) |
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class NetworkQuery(QueryBase): |
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FIELDS = query.NETWORK_FIELDS |
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|
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def ExpandNames(self, lu): |
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raise NotImplementedError |
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|
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def DeclareLocks(self, lu, level): |
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raise NotImplementedError |
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def _GetQueryData(self, lu): |
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raise NotImplementedError |
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@staticmethod
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def _GetStats(pool): |
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raise NotImplementedError |
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class LUNetworkQuery(NoHooksLU): |
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"""Logical unit for querying networks.
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"""
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REQ_BGL = False
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def CheckArguments(self): |
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raise NotImplementedError |
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def ExpandNames(self): |
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raise NotImplementedError |
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|
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def Exec(self, feedback_fn): |
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raise NotImplementedError |
432 |
|
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|
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def _FmtNetworkConflict(details): |
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"""Utility for L{_NetworkConflictCheck}.
|
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|
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"""
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return utils.CommaJoin("nic%s/%s" % (idx, ipaddr) |
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for (idx, ipaddr) in details) |
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|
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|
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def _NetworkConflictCheck(lu, check_fn, action, instances): |
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"""Checks for network interface conflicts with a network.
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|
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@type lu: L{LogicalUnit}
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@type check_fn: callable receiving one parameter (L{objects.NIC}) and
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returning boolean
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@param check_fn: Function checking for conflict
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@type action: string
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@param action: Part of error message (see code)
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@param instances: the instances to check
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@type instances: list of instance objects
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@raise errors.OpPrereqError: If conflicting IP addresses are found.
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|
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"""
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conflicts = [] |
457 |
|
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for instance in instances: |
459 |
instconflicts = [(idx, nic.ip) |
460 |
for (idx, nic) in enumerate(instance.nics) |
461 |
if check_fn(nic)]
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|
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if instconflicts:
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conflicts.append((instance.name, instconflicts)) |
465 |
|
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if conflicts:
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lu.LogWarning("IP addresses from network '%s', which is about to %s"
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" node group '%s', are in use: %s" %
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(lu.network_name, action, lu.group.name, |
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utils.CommaJoin(("%s: %s" %
|
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(name, _FmtNetworkConflict(details))) |
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for (name, details) in conflicts))) |
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|
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raise errors.OpPrereqError("Conflicting IP addresses found; " |
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" remove/modify the corresponding network"
|
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" interfaces", errors.ECODE_STATE)
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|
478 |
|
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class LUNetworkConnect(LogicalUnit): |
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"""Connect a network to a nodegroup
|
481 |
|
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"""
|
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HPATH = "network-connect"
|
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HTYPE = constants.HTYPE_NETWORK |
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REQ_BGL = False
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|
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def ExpandNames(self): |
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self.network_name = self.op.network_name |
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self.group_name = self.op.group_name |
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self.network_mode = self.op.network_mode |
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self.network_link = self.op.network_link |
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|
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self.network_uuid = self.cfg.LookupNetwork(self.network_name) |
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self.group_uuid = self.cfg.LookupNodeGroup(self.group_name) |
495 |
|
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self.needed_locks = {
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locking.LEVEL_INSTANCE: [], |
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locking.LEVEL_NODEGROUP: [self.group_uuid],
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} |
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self.share_locks[locking.LEVEL_INSTANCE] = 1 |
501 |
|
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if self.op.conflicts_check: |
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self.needed_locks[locking.LEVEL_NETWORK] = [self.network_uuid] |
504 |
self.share_locks[locking.LEVEL_NETWORK] = 1 |
505 |
|
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def DeclareLocks(self, level): |
507 |
if level == locking.LEVEL_INSTANCE:
|
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assert not self.needed_locks[locking.LEVEL_INSTANCE] |
509 |
|
510 |
# Lock instances optimistically, needs verification once group lock has
|
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# been acquired
|
512 |
if self.op.conflicts_check: |
513 |
self.needed_locks[locking.LEVEL_INSTANCE] = \
|
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self.cfg.GetInstanceNames(
|
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self.cfg.GetNodeGroupInstances(self.group_uuid)) |
516 |
|
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def BuildHooksEnv(self): |
518 |
ret = { |
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"GROUP_NAME": self.group_name, |
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"GROUP_NETWORK_MODE": self.network_mode, |
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"GROUP_NETWORK_LINK": self.network_link, |
522 |
} |
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return ret
|
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|
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def BuildHooksNodes(self): |
526 |
node_uuids = self.cfg.GetNodeGroup(self.group_uuid).members |
527 |
return (node_uuids, node_uuids)
|
528 |
|
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def CheckPrereq(self): |
530 |
owned_groups = frozenset(self.owned_locks(locking.LEVEL_NODEGROUP)) |
531 |
|
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assert self.group_uuid in owned_groups |
533 |
|
534 |
# Check if locked instances are still correct
|
535 |
owned_instance_names = frozenset(self.owned_locks(locking.LEVEL_INSTANCE)) |
536 |
if self.op.conflicts_check: |
537 |
CheckNodeGroupInstances(self.cfg, self.group_uuid, owned_instance_names) |
538 |
|
539 |
self.netparams = {
|
540 |
constants.NIC_MODE: self.network_mode,
|
541 |
constants.NIC_LINK: self.network_link,
|
542 |
} |
543 |
objects.NIC.CheckParameterSyntax(self.netparams)
|
544 |
|
545 |
self.group = self.cfg.GetNodeGroup(self.group_uuid) |
546 |
#if self.network_mode == constants.NIC_MODE_BRIDGED:
|
547 |
# _CheckNodeGroupBridgesExist(self, self.network_link, self.group_uuid)
|
548 |
self.connected = False |
549 |
if self.network_uuid in self.group.networks: |
550 |
self.LogWarning("Network '%s' is already mapped to group '%s'" % |
551 |
(self.network_name, self.group.name)) |
552 |
self.connected = True |
553 |
|
554 |
# check only if not already connected
|
555 |
elif self.op.conflicts_check: |
556 |
pool = network.AddressPool(self.cfg.GetNetwork(self.network_uuid)) |
557 |
|
558 |
_NetworkConflictCheck( |
559 |
self, lambda nic: pool.Contains(nic.ip), "connect to", |
560 |
[instance_info for (_, instance_info) in |
561 |
self.cfg.GetMultiInstanceInfoByName(owned_instance_names)])
|
562 |
|
563 |
def Exec(self, feedback_fn): |
564 |
# Connect the network and update the group only if not already connected
|
565 |
if not self.connected: |
566 |
self.group.networks[self.network_uuid] = self.netparams |
567 |
self.cfg.Update(self.group, feedback_fn) |
568 |
|
569 |
|
570 |
class LUNetworkDisconnect(LogicalUnit): |
571 |
"""Disconnect a network to a nodegroup
|
572 |
|
573 |
"""
|
574 |
HPATH = "network-disconnect"
|
575 |
HTYPE = constants.HTYPE_NETWORK |
576 |
REQ_BGL = False
|
577 |
|
578 |
def ExpandNames(self): |
579 |
self.network_name = self.op.network_name |
580 |
self.group_name = self.op.group_name |
581 |
|
582 |
self.network_uuid = self.cfg.LookupNetwork(self.network_name) |
583 |
self.group_uuid = self.cfg.LookupNodeGroup(self.group_name) |
584 |
|
585 |
self.needed_locks = {
|
586 |
locking.LEVEL_INSTANCE: [], |
587 |
locking.LEVEL_NODEGROUP: [self.group_uuid],
|
588 |
} |
589 |
self.share_locks[locking.LEVEL_INSTANCE] = 1 |
590 |
|
591 |
def DeclareLocks(self, level): |
592 |
if level == locking.LEVEL_INSTANCE:
|
593 |
assert not self.needed_locks[locking.LEVEL_INSTANCE] |
594 |
|
595 |
# Lock instances optimistically, needs verification once group lock has
|
596 |
# been acquired
|
597 |
self.needed_locks[locking.LEVEL_INSTANCE] = \
|
598 |
self.cfg.GetInstanceNames(
|
599 |
self.cfg.GetNodeGroupInstances(self.group_uuid)) |
600 |
|
601 |
def BuildHooksEnv(self): |
602 |
ret = { |
603 |
"GROUP_NAME": self.group_name, |
604 |
} |
605 |
return ret
|
606 |
|
607 |
def BuildHooksNodes(self): |
608 |
nodes = self.cfg.GetNodeGroup(self.group_uuid).members |
609 |
return (nodes, nodes)
|
610 |
|
611 |
def CheckPrereq(self): |
612 |
owned_groups = frozenset(self.owned_locks(locking.LEVEL_NODEGROUP)) |
613 |
|
614 |
assert self.group_uuid in owned_groups |
615 |
|
616 |
# Check if locked instances are still correct
|
617 |
owned_instances = frozenset(self.owned_locks(locking.LEVEL_INSTANCE)) |
618 |
CheckNodeGroupInstances(self.cfg, self.group_uuid, owned_instances) |
619 |
|
620 |
self.group = self.cfg.GetNodeGroup(self.group_uuid) |
621 |
self.connected = True |
622 |
if self.network_uuid not in self.group.networks: |
623 |
self.LogWarning("Network '%s' is not mapped to group '%s'", |
624 |
self.network_name, self.group.name) |
625 |
self.connected = False |
626 |
|
627 |
# We need this check only if network is not already connected
|
628 |
else:
|
629 |
_NetworkConflictCheck( |
630 |
self, lambda nic: nic.network == self.network_uuid, "disconnect from", |
631 |
[instance_info for (_, instance_info) in |
632 |
self.cfg.GetMultiInstanceInfoByName(owned_instances)])
|
633 |
|
634 |
def Exec(self, feedback_fn): |
635 |
# Disconnect the network and update the group only if network is connected
|
636 |
if self.connected: |
637 |
del self.group.networks[self.network_uuid] |
638 |
self.cfg.Update(self.group, feedback_fn) |