root / lib / cmdlib / instance_migration.py @ da27bc7d
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1 | 87e25be1 | Thomas Thrainer | #
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2 | 87e25be1 | Thomas Thrainer | #
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3 | 87e25be1 | Thomas Thrainer | |
4 | 87e25be1 | Thomas Thrainer | # Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Google Inc.
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5 | 87e25be1 | Thomas Thrainer | #
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6 | 87e25be1 | Thomas Thrainer | # This program is free software; you can redistribute it and/or modify
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7 | 87e25be1 | Thomas Thrainer | # it under the terms of the GNU General Public License as published by
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8 | 87e25be1 | Thomas Thrainer | # the Free Software Foundation; either version 2 of the License, or
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9 | 87e25be1 | Thomas Thrainer | # (at your option) any later version.
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10 | 87e25be1 | Thomas Thrainer | #
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11 | 87e25be1 | Thomas Thrainer | # This program is distributed in the hope that it will be useful, but
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12 | 87e25be1 | Thomas Thrainer | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 87e25be1 | Thomas Thrainer | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 87e25be1 | Thomas Thrainer | # General Public License for more details.
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15 | 87e25be1 | Thomas Thrainer | #
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16 | 87e25be1 | Thomas Thrainer | # You should have received a copy of the GNU General Public License
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17 | 87e25be1 | Thomas Thrainer | # along with this program; if not, write to the Free Software
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18 | 87e25be1 | Thomas Thrainer | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | 87e25be1 | Thomas Thrainer | # 02110-1301, USA.
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20 | 87e25be1 | Thomas Thrainer | |
21 | 87e25be1 | Thomas Thrainer | |
22 | 87e25be1 | Thomas Thrainer | """Logical units dealing with instance migration an failover."""
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23 | 87e25be1 | Thomas Thrainer | |
24 | 87e25be1 | Thomas Thrainer | import logging |
25 | 87e25be1 | Thomas Thrainer | import time |
26 | 87e25be1 | Thomas Thrainer | |
27 | 87e25be1 | Thomas Thrainer | from ganeti import constants |
28 | 87e25be1 | Thomas Thrainer | from ganeti import errors |
29 | 87e25be1 | Thomas Thrainer | from ganeti import locking |
30 | 87e25be1 | Thomas Thrainer | from ganeti.masterd import iallocator |
31 | 87e25be1 | Thomas Thrainer | from ganeti import utils |
32 | 87e25be1 | Thomas Thrainer | from ganeti.cmdlib.base import LogicalUnit, Tasklet |
33 | da4a52a3 | Thomas Thrainer | from ganeti.cmdlib.common import ExpandInstanceUuidAndName, \ |
34 | 1c3231aa | Thomas Thrainer | CheckIAllocatorOrNode, ExpandNodeUuidAndName |
35 | 5eacbcae | Thomas Thrainer | from ganeti.cmdlib.instance_storage import CheckDiskConsistency, \ |
36 | 5eacbcae | Thomas Thrainer | ExpandCheckDisks, ShutdownInstanceDisks, AssembleInstanceDisks |
37 | 5eacbcae | Thomas Thrainer | from ganeti.cmdlib.instance_utils import BuildInstanceHookEnvByObject, \ |
38 | 5eacbcae | Thomas Thrainer | CheckTargetNodeIPolicy, ReleaseLocks, CheckNodeNotDrained, \ |
39 | 5eacbcae | Thomas Thrainer | CopyLockList, CheckNodeFreeMemory, CheckInstanceBridgesExist |
40 | 87e25be1 | Thomas Thrainer | |
41 | 87e25be1 | Thomas Thrainer | import ganeti.masterd.instance |
42 | 87e25be1 | Thomas Thrainer | |
43 | 87e25be1 | Thomas Thrainer | |
44 | 87e25be1 | Thomas Thrainer | def _ExpandNamesForMigration(lu): |
45 | 87e25be1 | Thomas Thrainer | """Expands names for use with L{TLMigrateInstance}.
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46 | 87e25be1 | Thomas Thrainer |
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47 | 87e25be1 | Thomas Thrainer | @type lu: L{LogicalUnit}
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48 | 87e25be1 | Thomas Thrainer |
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49 | 87e25be1 | Thomas Thrainer | """
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50 | 87e25be1 | Thomas Thrainer | if lu.op.target_node is not None: |
51 | 1c3231aa | Thomas Thrainer | (lu.op.target_node_uuid, lu.op.target_node) = \ |
52 | 1c3231aa | Thomas Thrainer | ExpandNodeUuidAndName(lu.cfg, lu.op.target_node_uuid, lu.op.target_node) |
53 | 87e25be1 | Thomas Thrainer | |
54 | 87e25be1 | Thomas Thrainer | lu.needed_locks[locking.LEVEL_NODE] = [] |
55 | 87e25be1 | Thomas Thrainer | lu.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_REPLACE |
56 | 87e25be1 | Thomas Thrainer | |
57 | 87e25be1 | Thomas Thrainer | lu.needed_locks[locking.LEVEL_NODE_RES] = [] |
58 | 87e25be1 | Thomas Thrainer | lu.recalculate_locks[locking.LEVEL_NODE_RES] = constants.LOCKS_REPLACE |
59 | 87e25be1 | Thomas Thrainer | |
60 | 87e25be1 | Thomas Thrainer | # The node allocation lock is actually only needed for externally replicated
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61 | 87e25be1 | Thomas Thrainer | # instances (e.g. sharedfile or RBD) and if an iallocator is used.
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62 | 87e25be1 | Thomas Thrainer | lu.needed_locks[locking.LEVEL_NODE_ALLOC] = [] |
63 | 87e25be1 | Thomas Thrainer | |
64 | 87e25be1 | Thomas Thrainer | |
65 | 87e25be1 | Thomas Thrainer | def _DeclareLocksForMigration(lu, level): |
66 | 87e25be1 | Thomas Thrainer | """Declares locks for L{TLMigrateInstance}.
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67 | 87e25be1 | Thomas Thrainer |
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68 | 87e25be1 | Thomas Thrainer | @type lu: L{LogicalUnit}
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69 | 87e25be1 | Thomas Thrainer | @param level: Lock level
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70 | 87e25be1 | Thomas Thrainer |
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71 | 87e25be1 | Thomas Thrainer | """
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72 | 87e25be1 | Thomas Thrainer | if level == locking.LEVEL_NODE_ALLOC:
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73 | 87e25be1 | Thomas Thrainer | assert lu.op.instance_name in lu.owned_locks(locking.LEVEL_INSTANCE) |
74 | 87e25be1 | Thomas Thrainer | |
75 | da4a52a3 | Thomas Thrainer | instance = lu.cfg.GetInstanceInfo(lu.op.instance_uuid) |
76 | 87e25be1 | Thomas Thrainer | |
77 | 87e25be1 | Thomas Thrainer | # Node locks are already declared here rather than at LEVEL_NODE as we need
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78 | 87e25be1 | Thomas Thrainer | # the instance object anyway to declare the node allocation lock.
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79 | 87e25be1 | Thomas Thrainer | if instance.disk_template in constants.DTS_EXT_MIRROR: |
80 | 87e25be1 | Thomas Thrainer | if lu.op.target_node is None: |
81 | 87e25be1 | Thomas Thrainer | lu.needed_locks[locking.LEVEL_NODE] = locking.ALL_SET |
82 | 87e25be1 | Thomas Thrainer | lu.needed_locks[locking.LEVEL_NODE_ALLOC] = locking.ALL_SET |
83 | 87e25be1 | Thomas Thrainer | else:
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84 | 87e25be1 | Thomas Thrainer | lu.needed_locks[locking.LEVEL_NODE] = [instance.primary_node, |
85 | 1c3231aa | Thomas Thrainer | lu.op.target_node_uuid] |
86 | 87e25be1 | Thomas Thrainer | del lu.recalculate_locks[locking.LEVEL_NODE]
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87 | 87e25be1 | Thomas Thrainer | else:
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88 | 87e25be1 | Thomas Thrainer | lu._LockInstancesNodes() # pylint: disable=W0212
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89 | 87e25be1 | Thomas Thrainer | |
90 | 87e25be1 | Thomas Thrainer | elif level == locking.LEVEL_NODE:
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91 | 87e25be1 | Thomas Thrainer | # Node locks are declared together with the node allocation lock
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92 | 87e25be1 | Thomas Thrainer | assert (lu.needed_locks[locking.LEVEL_NODE] or |
93 | 87e25be1 | Thomas Thrainer | lu.needed_locks[locking.LEVEL_NODE] is locking.ALL_SET)
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94 | 87e25be1 | Thomas Thrainer | |
95 | 87e25be1 | Thomas Thrainer | elif level == locking.LEVEL_NODE_RES:
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96 | 87e25be1 | Thomas Thrainer | # Copy node locks
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97 | 87e25be1 | Thomas Thrainer | lu.needed_locks[locking.LEVEL_NODE_RES] = \ |
98 | 5eacbcae | Thomas Thrainer | CopyLockList(lu.needed_locks[locking.LEVEL_NODE]) |
99 | 87e25be1 | Thomas Thrainer | |
100 | 87e25be1 | Thomas Thrainer | |
101 | 87e25be1 | Thomas Thrainer | class LUInstanceFailover(LogicalUnit): |
102 | 87e25be1 | Thomas Thrainer | """Failover an instance.
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103 | 87e25be1 | Thomas Thrainer |
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104 | 87e25be1 | Thomas Thrainer | """
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105 | 87e25be1 | Thomas Thrainer | HPATH = "instance-failover"
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106 | 87e25be1 | Thomas Thrainer | HTYPE = constants.HTYPE_INSTANCE |
107 | 87e25be1 | Thomas Thrainer | REQ_BGL = False
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108 | 87e25be1 | Thomas Thrainer | |
109 | 87e25be1 | Thomas Thrainer | def CheckArguments(self): |
110 | 87e25be1 | Thomas Thrainer | """Check the arguments.
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111 | 87e25be1 | Thomas Thrainer |
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112 | 87e25be1 | Thomas Thrainer | """
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113 | 87e25be1 | Thomas Thrainer | self.iallocator = getattr(self.op, "iallocator", None) |
114 | 87e25be1 | Thomas Thrainer | self.target_node = getattr(self.op, "target_node", None) |
115 | 87e25be1 | Thomas Thrainer | |
116 | 87e25be1 | Thomas Thrainer | def ExpandNames(self): |
117 | 87e25be1 | Thomas Thrainer | self._ExpandAndLockInstance()
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118 | 87e25be1 | Thomas Thrainer | _ExpandNamesForMigration(self)
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119 | 87e25be1 | Thomas Thrainer | |
120 | 87e25be1 | Thomas Thrainer | self._migrater = \
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121 | da4a52a3 | Thomas Thrainer | TLMigrateInstance(self, self.op.instance_uuid, self.op.instance_name, |
122 | 804d72eb | Thomas Thrainer | self.op.cleanup, True, False, |
123 | 804d72eb | Thomas Thrainer | self.op.ignore_consistency, True, |
124 | 87e25be1 | Thomas Thrainer | self.op.shutdown_timeout, self.op.ignore_ipolicy) |
125 | 87e25be1 | Thomas Thrainer | |
126 | 87e25be1 | Thomas Thrainer | self.tasklets = [self._migrater] |
127 | 87e25be1 | Thomas Thrainer | |
128 | 87e25be1 | Thomas Thrainer | def DeclareLocks(self, level): |
129 | 87e25be1 | Thomas Thrainer | _DeclareLocksForMigration(self, level)
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130 | 87e25be1 | Thomas Thrainer | |
131 | 87e25be1 | Thomas Thrainer | def BuildHooksEnv(self): |
132 | 87e25be1 | Thomas Thrainer | """Build hooks env.
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133 | 87e25be1 | Thomas Thrainer |
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134 | 87e25be1 | Thomas Thrainer | This runs on master, primary and secondary nodes of the instance.
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135 | 87e25be1 | Thomas Thrainer |
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136 | 87e25be1 | Thomas Thrainer | """
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137 | 87e25be1 | Thomas Thrainer | instance = self._migrater.instance
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138 | 1c3231aa | Thomas Thrainer | source_node_uuid = instance.primary_node |
139 | 7b5f0674 | Dimitris Aragiorgis | target_node_uuid = self._migrater.target_node_uuid
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140 | 87e25be1 | Thomas Thrainer | env = { |
141 | 87e25be1 | Thomas Thrainer | "IGNORE_CONSISTENCY": self.op.ignore_consistency, |
142 | 87e25be1 | Thomas Thrainer | "SHUTDOWN_TIMEOUT": self.op.shutdown_timeout, |
143 | 1c3231aa | Thomas Thrainer | "OLD_PRIMARY": self.cfg.GetNodeName(source_node_uuid), |
144 | 7b5f0674 | Dimitris Aragiorgis | "NEW_PRIMARY": self.cfg.GetNodeName(target_node_uuid), |
145 | aa7a5c90 | Michele Tartara | "FAILOVER_CLEANUP": self.op.cleanup, |
146 | 87e25be1 | Thomas Thrainer | } |
147 | 87e25be1 | Thomas Thrainer | |
148 | 87e25be1 | Thomas Thrainer | if instance.disk_template in constants.DTS_INT_MIRROR: |
149 | 1c3231aa | Thomas Thrainer | env["OLD_SECONDARY"] = self.cfg.GetNodeName(instance.secondary_nodes[0]) |
150 | 1c3231aa | Thomas Thrainer | env["NEW_SECONDARY"] = self.cfg.GetNodeName(source_node_uuid) |
151 | 87e25be1 | Thomas Thrainer | else:
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152 | 87e25be1 | Thomas Thrainer | env["OLD_SECONDARY"] = env["NEW_SECONDARY"] = "" |
153 | 87e25be1 | Thomas Thrainer | |
154 | 5eacbcae | Thomas Thrainer | env.update(BuildInstanceHookEnvByObject(self, instance))
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155 | 87e25be1 | Thomas Thrainer | |
156 | 87e25be1 | Thomas Thrainer | return env
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157 | 87e25be1 | Thomas Thrainer | |
158 | 87e25be1 | Thomas Thrainer | def BuildHooksNodes(self): |
159 | 87e25be1 | Thomas Thrainer | """Build hooks nodes.
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160 | 87e25be1 | Thomas Thrainer |
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161 | 87e25be1 | Thomas Thrainer | """
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162 | 87e25be1 | Thomas Thrainer | instance = self._migrater.instance
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163 | 87e25be1 | Thomas Thrainer | nl = [self.cfg.GetMasterNode()] + list(instance.secondary_nodes) |
164 | 7b5f0674 | Dimitris Aragiorgis | nl.append(self._migrater.target_node_uuid)
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165 | 87e25be1 | Thomas Thrainer | return (nl, nl + [instance.primary_node])
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166 | 87e25be1 | Thomas Thrainer | |
167 | 87e25be1 | Thomas Thrainer | |
168 | 87e25be1 | Thomas Thrainer | class LUInstanceMigrate(LogicalUnit): |
169 | 87e25be1 | Thomas Thrainer | """Migrate an instance.
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170 | 87e25be1 | Thomas Thrainer |
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171 | 87e25be1 | Thomas Thrainer | This is migration without shutting down, compared to the failover,
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172 | 87e25be1 | Thomas Thrainer | which is done with shutdown.
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173 | 87e25be1 | Thomas Thrainer |
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174 | 87e25be1 | Thomas Thrainer | """
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175 | 87e25be1 | Thomas Thrainer | HPATH = "instance-migrate"
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176 | 87e25be1 | Thomas Thrainer | HTYPE = constants.HTYPE_INSTANCE |
177 | 87e25be1 | Thomas Thrainer | REQ_BGL = False
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178 | 87e25be1 | Thomas Thrainer | |
179 | 87e25be1 | Thomas Thrainer | def ExpandNames(self): |
180 | 87e25be1 | Thomas Thrainer | self._ExpandAndLockInstance()
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181 | 87e25be1 | Thomas Thrainer | _ExpandNamesForMigration(self)
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182 | 87e25be1 | Thomas Thrainer | |
183 | 87e25be1 | Thomas Thrainer | self._migrater = \
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184 | da4a52a3 | Thomas Thrainer | TLMigrateInstance(self, self.op.instance_uuid, self.op.instance_name, |
185 | da4a52a3 | Thomas Thrainer | self.op.cleanup, False, self.op.allow_failover, False, |
186 | 87e25be1 | Thomas Thrainer | self.op.allow_runtime_changes,
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187 | 87e25be1 | Thomas Thrainer | constants.DEFAULT_SHUTDOWN_TIMEOUT, |
188 | 87e25be1 | Thomas Thrainer | self.op.ignore_ipolicy)
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189 | 87e25be1 | Thomas Thrainer | |
190 | 87e25be1 | Thomas Thrainer | self.tasklets = [self._migrater] |
191 | 87e25be1 | Thomas Thrainer | |
192 | 87e25be1 | Thomas Thrainer | def DeclareLocks(self, level): |
193 | 87e25be1 | Thomas Thrainer | _DeclareLocksForMigration(self, level)
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194 | 87e25be1 | Thomas Thrainer | |
195 | 87e25be1 | Thomas Thrainer | def BuildHooksEnv(self): |
196 | 87e25be1 | Thomas Thrainer | """Build hooks env.
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197 | 87e25be1 | Thomas Thrainer |
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198 | 87e25be1 | Thomas Thrainer | This runs on master, primary and secondary nodes of the instance.
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199 | 87e25be1 | Thomas Thrainer |
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200 | 87e25be1 | Thomas Thrainer | """
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201 | 87e25be1 | Thomas Thrainer | instance = self._migrater.instance
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202 | 1c3231aa | Thomas Thrainer | source_node_uuid = instance.primary_node |
203 | 7b5f0674 | Dimitris Aragiorgis | target_node_uuid = self._migrater.target_node_uuid
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204 | 5eacbcae | Thomas Thrainer | env = BuildInstanceHookEnvByObject(self, instance)
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205 | 87e25be1 | Thomas Thrainer | env.update({ |
206 | 87e25be1 | Thomas Thrainer | "MIGRATE_LIVE": self._migrater.live, |
207 | 87e25be1 | Thomas Thrainer | "MIGRATE_CLEANUP": self.op.cleanup, |
208 | 1c3231aa | Thomas Thrainer | "OLD_PRIMARY": self.cfg.GetNodeName(source_node_uuid), |
209 | 7b5f0674 | Dimitris Aragiorgis | "NEW_PRIMARY": self.cfg.GetNodeName(target_node_uuid), |
210 | 87e25be1 | Thomas Thrainer | "ALLOW_RUNTIME_CHANGES": self.op.allow_runtime_changes, |
211 | 87e25be1 | Thomas Thrainer | }) |
212 | 87e25be1 | Thomas Thrainer | |
213 | 87e25be1 | Thomas Thrainer | if instance.disk_template in constants.DTS_INT_MIRROR: |
214 | 1c3231aa | Thomas Thrainer | env["OLD_SECONDARY"] = self.cfg.GetNodeName(instance.secondary_nodes[0]) |
215 | 1c3231aa | Thomas Thrainer | env["NEW_SECONDARY"] = self.cfg.GetNodeName(source_node_uuid) |
216 | 87e25be1 | Thomas Thrainer | else:
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217 | 7b5f0674 | Dimitris Aragiorgis | env["OLD_SECONDARY"] = env["NEW_SECONDARY"] = "" |
218 | 87e25be1 | Thomas Thrainer | |
219 | 87e25be1 | Thomas Thrainer | return env
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220 | 87e25be1 | Thomas Thrainer | |
221 | 87e25be1 | Thomas Thrainer | def BuildHooksNodes(self): |
222 | 87e25be1 | Thomas Thrainer | """Build hooks nodes.
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223 | 87e25be1 | Thomas Thrainer |
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224 | 87e25be1 | Thomas Thrainer | """
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225 | 87e25be1 | Thomas Thrainer | instance = self._migrater.instance
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226 | 1c3231aa | Thomas Thrainer | snode_uuids = list(instance.secondary_nodes)
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227 | 1c3231aa | Thomas Thrainer | nl = [self.cfg.GetMasterNode(), instance.primary_node] + snode_uuids
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228 | 7b5f0674 | Dimitris Aragiorgis | nl.append(self._migrater.target_node_uuid)
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229 | 87e25be1 | Thomas Thrainer | return (nl, nl)
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230 | 87e25be1 | Thomas Thrainer | |
231 | 87e25be1 | Thomas Thrainer | |
232 | 87e25be1 | Thomas Thrainer | class TLMigrateInstance(Tasklet): |
233 | 87e25be1 | Thomas Thrainer | """Tasklet class for instance migration.
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234 | 87e25be1 | Thomas Thrainer |
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235 | 87e25be1 | Thomas Thrainer | @type live: boolean
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236 | 87e25be1 | Thomas Thrainer | @ivar live: whether the migration will be done live or non-live;
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237 | 87e25be1 | Thomas Thrainer | this variable is initalized only after CheckPrereq has run
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238 | 87e25be1 | Thomas Thrainer | @type cleanup: boolean
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239 | 87e25be1 | Thomas Thrainer | @ivar cleanup: Wheater we cleanup from a failed migration
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240 | 87e25be1 | Thomas Thrainer | @type iallocator: string
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241 | 87e25be1 | Thomas Thrainer | @ivar iallocator: The iallocator used to determine target_node
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242 | 1c3231aa | Thomas Thrainer | @type target_node_uuid: string
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243 | 1c3231aa | Thomas Thrainer | @ivar target_node_uuid: If given, the target node UUID to reallocate the
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244 | 1c3231aa | Thomas Thrainer | instance to
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245 | 87e25be1 | Thomas Thrainer | @type failover: boolean
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246 | 87e25be1 | Thomas Thrainer | @ivar failover: Whether operation results in failover or migration
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247 | 87e25be1 | Thomas Thrainer | @type fallback: boolean
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248 | 87e25be1 | Thomas Thrainer | @ivar fallback: Whether fallback to failover is allowed if migration not
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249 | 87e25be1 | Thomas Thrainer | possible
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250 | 87e25be1 | Thomas Thrainer | @type ignore_consistency: boolean
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251 | 87e25be1 | Thomas Thrainer | @ivar ignore_consistency: Wheter we should ignore consistency between source
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252 | 87e25be1 | Thomas Thrainer | and target node
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253 | 87e25be1 | Thomas Thrainer | @type shutdown_timeout: int
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254 | 87e25be1 | Thomas Thrainer | @ivar shutdown_timeout: In case of failover timeout of the shutdown
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255 | 87e25be1 | Thomas Thrainer | @type ignore_ipolicy: bool
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256 | 87e25be1 | Thomas Thrainer | @ivar ignore_ipolicy: If true, we can ignore instance policy when migrating
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257 | 87e25be1 | Thomas Thrainer |
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258 | 87e25be1 | Thomas Thrainer | """
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259 | 87e25be1 | Thomas Thrainer | |
260 | 87e25be1 | Thomas Thrainer | # Constants
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261 | 87e25be1 | Thomas Thrainer | _MIGRATION_POLL_INTERVAL = 1 # seconds |
262 | 87e25be1 | Thomas Thrainer | _MIGRATION_FEEDBACK_INTERVAL = 10 # seconds |
263 | 87e25be1 | Thomas Thrainer | |
264 | da4a52a3 | Thomas Thrainer | def __init__(self, lu, instance_uuid, instance_name, cleanup, failover, |
265 | da4a52a3 | Thomas Thrainer | fallback, ignore_consistency, allow_runtime_changes, |
266 | da4a52a3 | Thomas Thrainer | shutdown_timeout, ignore_ipolicy): |
267 | 87e25be1 | Thomas Thrainer | """Initializes this class.
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268 | 87e25be1 | Thomas Thrainer |
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269 | 87e25be1 | Thomas Thrainer | """
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270 | 87e25be1 | Thomas Thrainer | Tasklet.__init__(self, lu)
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271 | 87e25be1 | Thomas Thrainer | |
272 | 87e25be1 | Thomas Thrainer | # Parameters
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273 | da4a52a3 | Thomas Thrainer | self.instance_uuid = instance_uuid
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274 | 87e25be1 | Thomas Thrainer | self.instance_name = instance_name
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275 | 87e25be1 | Thomas Thrainer | self.cleanup = cleanup
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276 | 87e25be1 | Thomas Thrainer | self.live = False # will be overridden later |
277 | 87e25be1 | Thomas Thrainer | self.failover = failover
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278 | 87e25be1 | Thomas Thrainer | self.fallback = fallback
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279 | 87e25be1 | Thomas Thrainer | self.ignore_consistency = ignore_consistency
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280 | 87e25be1 | Thomas Thrainer | self.shutdown_timeout = shutdown_timeout
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281 | 87e25be1 | Thomas Thrainer | self.ignore_ipolicy = ignore_ipolicy
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282 | 87e25be1 | Thomas Thrainer | self.allow_runtime_changes = allow_runtime_changes
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283 | 87e25be1 | Thomas Thrainer | |
284 | 87e25be1 | Thomas Thrainer | def CheckPrereq(self): |
285 | 87e25be1 | Thomas Thrainer | """Check prerequisites.
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286 | 87e25be1 | Thomas Thrainer |
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287 | 87e25be1 | Thomas Thrainer | This checks that the instance is in the cluster.
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288 | 87e25be1 | Thomas Thrainer |
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289 | 87e25be1 | Thomas Thrainer | """
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290 | da4a52a3 | Thomas Thrainer | (self.instance_uuid, self.instance_name) = \ |
291 | da4a52a3 | Thomas Thrainer | ExpandInstanceUuidAndName(self.lu.cfg, self.instance_uuid, |
292 | da4a52a3 | Thomas Thrainer | self.instance_name)
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293 | da4a52a3 | Thomas Thrainer | self.instance = self.cfg.GetInstanceInfo(self.instance_uuid) |
294 | d0d7d7cf | Thomas Thrainer | assert self.instance is not None |
295 | 87e25be1 | Thomas Thrainer | cluster = self.cfg.GetClusterInfo()
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296 | 87e25be1 | Thomas Thrainer | |
297 | 87e25be1 | Thomas Thrainer | if (not self.cleanup and |
298 | d0d7d7cf | Thomas Thrainer | not self.instance.admin_state == constants.ADMINST_UP and |
299 | 87e25be1 | Thomas Thrainer | not self.failover and self.fallback): |
300 | 87e25be1 | Thomas Thrainer | self.lu.LogInfo("Instance is marked down or offline, fallback allowed," |
301 | 87e25be1 | Thomas Thrainer | " switching to failover")
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302 | 87e25be1 | Thomas Thrainer | self.failover = True |
303 | 87e25be1 | Thomas Thrainer | |
304 | d0d7d7cf | Thomas Thrainer | if self.instance.disk_template not in constants.DTS_MIRRORED: |
305 | 87e25be1 | Thomas Thrainer | if self.failover: |
306 | 87e25be1 | Thomas Thrainer | text = "failovers"
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307 | 87e25be1 | Thomas Thrainer | else:
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308 | 87e25be1 | Thomas Thrainer | text = "migrations"
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309 | 87e25be1 | Thomas Thrainer | raise errors.OpPrereqError("Instance's disk layout '%s' does not allow" |
310 | d0d7d7cf | Thomas Thrainer | " %s" % (self.instance.disk_template, text), |
311 | 87e25be1 | Thomas Thrainer | errors.ECODE_STATE) |
312 | 87e25be1 | Thomas Thrainer | |
313 | d0d7d7cf | Thomas Thrainer | if self.instance.disk_template in constants.DTS_EXT_MIRROR: |
314 | 5eacbcae | Thomas Thrainer | CheckIAllocatorOrNode(self.lu, "iallocator", "target_node") |
315 | 87e25be1 | Thomas Thrainer | |
316 | 87e25be1 | Thomas Thrainer | if self.lu.op.iallocator: |
317 | 87e25be1 | Thomas Thrainer | assert locking.NAL in self.lu.owned_locks(locking.LEVEL_NODE_ALLOC) |
318 | 87e25be1 | Thomas Thrainer | self._RunAllocator()
|
319 | 87e25be1 | Thomas Thrainer | else:
|
320 | 1c3231aa | Thomas Thrainer | # We set set self.target_node_uuid as it is required by
|
321 | 87e25be1 | Thomas Thrainer | # BuildHooksEnv
|
322 | 1c3231aa | Thomas Thrainer | self.target_node_uuid = self.lu.op.target_node_uuid |
323 | 87e25be1 | Thomas Thrainer | |
324 | 87e25be1 | Thomas Thrainer | # Check that the target node is correct in terms of instance policy
|
325 | 1c3231aa | Thomas Thrainer | nodeinfo = self.cfg.GetNodeInfo(self.target_node_uuid) |
326 | 87e25be1 | Thomas Thrainer | group_info = self.cfg.GetNodeGroup(nodeinfo.group)
|
327 | 87e25be1 | Thomas Thrainer | ipolicy = ganeti.masterd.instance.CalculateGroupIPolicy(cluster, |
328 | 87e25be1 | Thomas Thrainer | group_info) |
329 | d0d7d7cf | Thomas Thrainer | CheckTargetNodeIPolicy(self.lu, ipolicy, self.instance, nodeinfo, |
330 | d0d7d7cf | Thomas Thrainer | self.cfg, ignore=self.ignore_ipolicy) |
331 | 87e25be1 | Thomas Thrainer | |
332 | 87e25be1 | Thomas Thrainer | # self.target_node is already populated, either directly or by the
|
333 | 87e25be1 | Thomas Thrainer | # iallocator run
|
334 | 1c3231aa | Thomas Thrainer | target_node_uuid = self.target_node_uuid
|
335 | d0d7d7cf | Thomas Thrainer | if self.target_node_uuid == self.instance.primary_node: |
336 | 1c3231aa | Thomas Thrainer | raise errors.OpPrereqError(
|
337 | 1c3231aa | Thomas Thrainer | "Cannot migrate instance %s to its primary (%s)" %
|
338 | d0d7d7cf | Thomas Thrainer | (self.instance.name,
|
339 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.instance.primary_node)), |
340 | 1c3231aa | Thomas Thrainer | errors.ECODE_STATE) |
341 | 87e25be1 | Thomas Thrainer | |
342 | 87e25be1 | Thomas Thrainer | if len(self.lu.tasklets) == 1: |
343 | 87e25be1 | Thomas Thrainer | # It is safe to release locks only when we're the only tasklet
|
344 | 87e25be1 | Thomas Thrainer | # in the LU
|
345 | 5eacbcae | Thomas Thrainer | ReleaseLocks(self.lu, locking.LEVEL_NODE,
|
346 | d0d7d7cf | Thomas Thrainer | keep=[self.instance.primary_node, self.target_node_uuid]) |
347 | 5eacbcae | Thomas Thrainer | ReleaseLocks(self.lu, locking.LEVEL_NODE_ALLOC)
|
348 | 87e25be1 | Thomas Thrainer | |
349 | 87e25be1 | Thomas Thrainer | else:
|
350 | 87e25be1 | Thomas Thrainer | assert not self.lu.glm.is_owned(locking.LEVEL_NODE_ALLOC) |
351 | 87e25be1 | Thomas Thrainer | |
352 | d0d7d7cf | Thomas Thrainer | secondary_node_uuids = self.instance.secondary_nodes
|
353 | 1c3231aa | Thomas Thrainer | if not secondary_node_uuids: |
354 | 87e25be1 | Thomas Thrainer | raise errors.ConfigurationError("No secondary node but using" |
355 | 87e25be1 | Thomas Thrainer | " %s disk template" %
|
356 | d0d7d7cf | Thomas Thrainer | self.instance.disk_template)
|
357 | 7b5f0674 | Dimitris Aragiorgis | self.target_node_uuid = target_node_uuid = secondary_node_uuids[0] |
358 | 1c3231aa | Thomas Thrainer | if self.lu.op.iallocator or \ |
359 | 1c3231aa | Thomas Thrainer | (self.lu.op.target_node_uuid and |
360 | 1c3231aa | Thomas Thrainer | self.lu.op.target_node_uuid != target_node_uuid):
|
361 | 87e25be1 | Thomas Thrainer | if self.failover: |
362 | 87e25be1 | Thomas Thrainer | text = "failed over"
|
363 | 87e25be1 | Thomas Thrainer | else:
|
364 | 87e25be1 | Thomas Thrainer | text = "migrated"
|
365 | 87e25be1 | Thomas Thrainer | raise errors.OpPrereqError("Instances with disk template %s cannot" |
366 | 87e25be1 | Thomas Thrainer | " be %s to arbitrary nodes"
|
367 | 87e25be1 | Thomas Thrainer | " (neither an iallocator nor a target"
|
368 | 87e25be1 | Thomas Thrainer | " node can be passed)" %
|
369 | d0d7d7cf | Thomas Thrainer | (self.instance.disk_template, text),
|
370 | 87e25be1 | Thomas Thrainer | errors.ECODE_INVAL) |
371 | 1c3231aa | Thomas Thrainer | nodeinfo = self.cfg.GetNodeInfo(target_node_uuid)
|
372 | 87e25be1 | Thomas Thrainer | group_info = self.cfg.GetNodeGroup(nodeinfo.group)
|
373 | 87e25be1 | Thomas Thrainer | ipolicy = ganeti.masterd.instance.CalculateGroupIPolicy(cluster, |
374 | 87e25be1 | Thomas Thrainer | group_info) |
375 | d0d7d7cf | Thomas Thrainer | CheckTargetNodeIPolicy(self.lu, ipolicy, self.instance, nodeinfo, |
376 | d0d7d7cf | Thomas Thrainer | self.cfg, ignore=self.ignore_ipolicy) |
377 | 87e25be1 | Thomas Thrainer | |
378 | d0d7d7cf | Thomas Thrainer | i_be = cluster.FillBE(self.instance)
|
379 | 87e25be1 | Thomas Thrainer | |
380 | 87e25be1 | Thomas Thrainer | # check memory requirements on the secondary node
|
381 | 87e25be1 | Thomas Thrainer | if (not self.cleanup and |
382 | d0d7d7cf | Thomas Thrainer | (not self.failover or |
383 | d0d7d7cf | Thomas Thrainer | self.instance.admin_state == constants.ADMINST_UP)):
|
384 | a295eb80 | Helga Velroyen | self.tgt_free_mem = CheckNodeFreeMemory(
|
385 | d0d7d7cf | Thomas Thrainer | self.lu, target_node_uuid,
|
386 | d0d7d7cf | Thomas Thrainer | "migrating instance %s" % self.instance.name, |
387 | d0d7d7cf | Thomas Thrainer | i_be[constants.BE_MINMEM], self.instance.hypervisor,
|
388 | d0d7d7cf | Thomas Thrainer | self.cfg.GetClusterInfo().hvparams[self.instance.hypervisor]) |
389 | 87e25be1 | Thomas Thrainer | else:
|
390 | 87e25be1 | Thomas Thrainer | self.lu.LogInfo("Not checking memory on the secondary node as" |
391 | 87e25be1 | Thomas Thrainer | " instance will not be started")
|
392 | 87e25be1 | Thomas Thrainer | |
393 | 87e25be1 | Thomas Thrainer | # check if failover must be forced instead of migration
|
394 | 87e25be1 | Thomas Thrainer | if (not self.cleanup and not self.failover and |
395 | 87e25be1 | Thomas Thrainer | i_be[constants.BE_ALWAYS_FAILOVER]): |
396 | 87e25be1 | Thomas Thrainer | self.lu.LogInfo("Instance configured to always failover; fallback" |
397 | 87e25be1 | Thomas Thrainer | " to failover")
|
398 | 87e25be1 | Thomas Thrainer | self.failover = True |
399 | 87e25be1 | Thomas Thrainer | |
400 | 87e25be1 | Thomas Thrainer | # check bridge existance
|
401 | d0d7d7cf | Thomas Thrainer | CheckInstanceBridgesExist(self.lu, self.instance, |
402 | d0d7d7cf | Thomas Thrainer | node_uuid=target_node_uuid) |
403 | 87e25be1 | Thomas Thrainer | |
404 | 87e25be1 | Thomas Thrainer | if not self.cleanup: |
405 | 1c3231aa | Thomas Thrainer | CheckNodeNotDrained(self.lu, target_node_uuid)
|
406 | 87e25be1 | Thomas Thrainer | if not self.failover: |
407 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_instance_migratable(self.instance.primary_node, |
408 | d0d7d7cf | Thomas Thrainer | self.instance)
|
409 | 87e25be1 | Thomas Thrainer | if result.fail_msg and self.fallback: |
410 | 87e25be1 | Thomas Thrainer | self.lu.LogInfo("Can't migrate, instance offline, fallback to" |
411 | 87e25be1 | Thomas Thrainer | " failover")
|
412 | 87e25be1 | Thomas Thrainer | self.failover = True |
413 | 87e25be1 | Thomas Thrainer | else:
|
414 | 87e25be1 | Thomas Thrainer | result.Raise("Can't migrate, please use failover",
|
415 | 87e25be1 | Thomas Thrainer | prereq=True, ecode=errors.ECODE_STATE)
|
416 | 87e25be1 | Thomas Thrainer | |
417 | 87e25be1 | Thomas Thrainer | assert not (self.failover and self.cleanup) |
418 | 87e25be1 | Thomas Thrainer | |
419 | 87e25be1 | Thomas Thrainer | if not self.failover: |
420 | 87e25be1 | Thomas Thrainer | if self.lu.op.live is not None and self.lu.op.mode is not None: |
421 | 87e25be1 | Thomas Thrainer | raise errors.OpPrereqError("Only one of the 'live' and 'mode'" |
422 | 87e25be1 | Thomas Thrainer | " parameters are accepted",
|
423 | 87e25be1 | Thomas Thrainer | errors.ECODE_INVAL) |
424 | 87e25be1 | Thomas Thrainer | if self.lu.op.live is not None: |
425 | 87e25be1 | Thomas Thrainer | if self.lu.op.live: |
426 | 87e25be1 | Thomas Thrainer | self.lu.op.mode = constants.HT_MIGRATION_LIVE
|
427 | 87e25be1 | Thomas Thrainer | else:
|
428 | 87e25be1 | Thomas Thrainer | self.lu.op.mode = constants.HT_MIGRATION_NONLIVE
|
429 | 87e25be1 | Thomas Thrainer | # reset the 'live' parameter to None so that repeated
|
430 | 87e25be1 | Thomas Thrainer | # invocations of CheckPrereq do not raise an exception
|
431 | 87e25be1 | Thomas Thrainer | self.lu.op.live = None |
432 | 87e25be1 | Thomas Thrainer | elif self.lu.op.mode is None: |
433 | 87e25be1 | Thomas Thrainer | # read the default value from the hypervisor
|
434 | 87e25be1 | Thomas Thrainer | i_hv = cluster.FillHV(self.instance, skip_globals=False) |
435 | 87e25be1 | Thomas Thrainer | self.lu.op.mode = i_hv[constants.HV_MIGRATION_MODE]
|
436 | 87e25be1 | Thomas Thrainer | |
437 | 87e25be1 | Thomas Thrainer | self.live = self.lu.op.mode == constants.HT_MIGRATION_LIVE |
438 | 87e25be1 | Thomas Thrainer | else:
|
439 | 87e25be1 | Thomas Thrainer | # Failover is never live
|
440 | 87e25be1 | Thomas Thrainer | self.live = False |
441 | 87e25be1 | Thomas Thrainer | |
442 | 87e25be1 | Thomas Thrainer | if not (self.failover or self.cleanup): |
443 | 0bbec3af | Helga Velroyen | remote_info = self.rpc.call_instance_info(
|
444 | d0d7d7cf | Thomas Thrainer | self.instance.primary_node, self.instance.name, |
445 | d0d7d7cf | Thomas Thrainer | self.instance.hypervisor, cluster.hvparams[self.instance.hypervisor]) |
446 | 87e25be1 | Thomas Thrainer | remote_info.Raise("Error checking instance on node %s" %
|
447 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.instance.primary_node)) |
448 | 87e25be1 | Thomas Thrainer | instance_running = bool(remote_info.payload)
|
449 | 87e25be1 | Thomas Thrainer | if instance_running:
|
450 | 87e25be1 | Thomas Thrainer | self.current_mem = int(remote_info.payload["memory"]) |
451 | 87e25be1 | Thomas Thrainer | |
452 | 87e25be1 | Thomas Thrainer | def _RunAllocator(self): |
453 | 87e25be1 | Thomas Thrainer | """Run the allocator based on input opcode.
|
454 | 87e25be1 | Thomas Thrainer |
|
455 | 87e25be1 | Thomas Thrainer | """
|
456 | 87e25be1 | Thomas Thrainer | assert locking.NAL in self.lu.owned_locks(locking.LEVEL_NODE_ALLOC) |
457 | 87e25be1 | Thomas Thrainer | |
458 | 87e25be1 | Thomas Thrainer | # FIXME: add a self.ignore_ipolicy option
|
459 | 1c3231aa | Thomas Thrainer | req = iallocator.IAReqRelocate( |
460 | da4a52a3 | Thomas Thrainer | inst_uuid=self.instance_uuid,
|
461 | 1c3231aa | Thomas Thrainer | relocate_from_node_uuids=[self.instance.primary_node])
|
462 | 87e25be1 | Thomas Thrainer | ial = iallocator.IAllocator(self.cfg, self.rpc, req) |
463 | 87e25be1 | Thomas Thrainer | |
464 | 87e25be1 | Thomas Thrainer | ial.Run(self.lu.op.iallocator)
|
465 | 87e25be1 | Thomas Thrainer | |
466 | 87e25be1 | Thomas Thrainer | if not ial.success: |
467 | 87e25be1 | Thomas Thrainer | raise errors.OpPrereqError("Can't compute nodes using" |
468 | 87e25be1 | Thomas Thrainer | " iallocator '%s': %s" %
|
469 | 87e25be1 | Thomas Thrainer | (self.lu.op.iallocator, ial.info),
|
470 | 87e25be1 | Thomas Thrainer | errors.ECODE_NORES) |
471 | 1c3231aa | Thomas Thrainer | self.target_node_uuid = self.cfg.GetNodeInfoByName(ial.result[0]).uuid |
472 | 87e25be1 | Thomas Thrainer | self.lu.LogInfo("Selected nodes for instance %s via iallocator %s: %s", |
473 | 87e25be1 | Thomas Thrainer | self.instance_name, self.lu.op.iallocator, |
474 | 87e25be1 | Thomas Thrainer | utils.CommaJoin(ial.result)) |
475 | 87e25be1 | Thomas Thrainer | |
476 | 87e25be1 | Thomas Thrainer | def _WaitUntilSync(self): |
477 | 87e25be1 | Thomas Thrainer | """Poll with custom rpc for disk sync.
|
478 | 87e25be1 | Thomas Thrainer |
|
479 | 87e25be1 | Thomas Thrainer | This uses our own step-based rpc call.
|
480 | 87e25be1 | Thomas Thrainer |
|
481 | 87e25be1 | Thomas Thrainer | """
|
482 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* wait until resync is done") |
483 | 87e25be1 | Thomas Thrainer | all_done = False
|
484 | 87e25be1 | Thomas Thrainer | while not all_done: |
485 | 87e25be1 | Thomas Thrainer | all_done = True
|
486 | 1c3231aa | Thomas Thrainer | result = self.rpc.call_drbd_wait_sync(self.all_node_uuids, |
487 | 87e25be1 | Thomas Thrainer | (self.instance.disks,
|
488 | 87e25be1 | Thomas Thrainer | self.instance))
|
489 | 87e25be1 | Thomas Thrainer | min_percent = 100
|
490 | 1c3231aa | Thomas Thrainer | for node_uuid, nres in result.items(): |
491 | 1c3231aa | Thomas Thrainer | nres.Raise("Cannot resync disks on node %s" %
|
492 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(node_uuid))
|
493 | 87e25be1 | Thomas Thrainer | node_done, node_percent = nres.payload |
494 | 87e25be1 | Thomas Thrainer | all_done = all_done and node_done
|
495 | 87e25be1 | Thomas Thrainer | if node_percent is not None: |
496 | 87e25be1 | Thomas Thrainer | min_percent = min(min_percent, node_percent)
|
497 | 87e25be1 | Thomas Thrainer | if not all_done: |
498 | 87e25be1 | Thomas Thrainer | if min_percent < 100: |
499 | 87e25be1 | Thomas Thrainer | self.feedback_fn(" - progress: %.1f%%" % min_percent) |
500 | 87e25be1 | Thomas Thrainer | time.sleep(2)
|
501 | 87e25be1 | Thomas Thrainer | |
502 | 1c3231aa | Thomas Thrainer | def _EnsureSecondary(self, node_uuid): |
503 | 87e25be1 | Thomas Thrainer | """Demote a node to secondary.
|
504 | 87e25be1 | Thomas Thrainer |
|
505 | 87e25be1 | Thomas Thrainer | """
|
506 | 1c3231aa | Thomas Thrainer | self.feedback_fn("* switching node %s to secondary mode" % |
507 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(node_uuid))
|
508 | 87e25be1 | Thomas Thrainer | |
509 | 1c3231aa | Thomas Thrainer | result = self.rpc.call_blockdev_close(node_uuid, self.instance.name, |
510 | 0c3d9c7c | Thomas Thrainer | (self.instance.disks, self.instance)) |
511 | 1c3231aa | Thomas Thrainer | result.Raise("Cannot change disk to secondary on node %s" %
|
512 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(node_uuid))
|
513 | 87e25be1 | Thomas Thrainer | |
514 | 87e25be1 | Thomas Thrainer | def _GoStandalone(self): |
515 | 87e25be1 | Thomas Thrainer | """Disconnect from the network.
|
516 | 87e25be1 | Thomas Thrainer |
|
517 | 87e25be1 | Thomas Thrainer | """
|
518 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* changing into standalone mode") |
519 | 0c3d9c7c | Thomas Thrainer | result = self.rpc.call_drbd_disconnect_net(
|
520 | 0c3d9c7c | Thomas Thrainer | self.all_node_uuids, (self.instance.disks, self.instance)) |
521 | 1c3231aa | Thomas Thrainer | for node_uuid, nres in result.items(): |
522 | 1c3231aa | Thomas Thrainer | nres.Raise("Cannot disconnect disks node %s" %
|
523 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(node_uuid))
|
524 | 87e25be1 | Thomas Thrainer | |
525 | 87e25be1 | Thomas Thrainer | def _GoReconnect(self, multimaster): |
526 | 87e25be1 | Thomas Thrainer | """Reconnect to the network.
|
527 | 87e25be1 | Thomas Thrainer |
|
528 | 87e25be1 | Thomas Thrainer | """
|
529 | 87e25be1 | Thomas Thrainer | if multimaster:
|
530 | 87e25be1 | Thomas Thrainer | msg = "dual-master"
|
531 | 87e25be1 | Thomas Thrainer | else:
|
532 | 87e25be1 | Thomas Thrainer | msg = "single-master"
|
533 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* changing disks into %s mode" % msg) |
534 | 0c3d9c7c | Thomas Thrainer | result = self.rpc.call_drbd_attach_net(self.all_node_uuids, |
535 | 87e25be1 | Thomas Thrainer | (self.instance.disks, self.instance), |
536 | 87e25be1 | Thomas Thrainer | self.instance.name, multimaster)
|
537 | 1c3231aa | Thomas Thrainer | for node_uuid, nres in result.items(): |
538 | 1c3231aa | Thomas Thrainer | nres.Raise("Cannot change disks config on node %s" %
|
539 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(node_uuid))
|
540 | 87e25be1 | Thomas Thrainer | |
541 | 87e25be1 | Thomas Thrainer | def _ExecCleanup(self): |
542 | 87e25be1 | Thomas Thrainer | """Try to cleanup after a failed migration.
|
543 | 87e25be1 | Thomas Thrainer |
|
544 | 87e25be1 | Thomas Thrainer | The cleanup is done by:
|
545 | 87e25be1 | Thomas Thrainer | - check that the instance is running only on one node
|
546 | 87e25be1 | Thomas Thrainer | (and update the config if needed)
|
547 | 87e25be1 | Thomas Thrainer | - change disks on its secondary node to secondary
|
548 | 87e25be1 | Thomas Thrainer | - wait until disks are fully synchronized
|
549 | 87e25be1 | Thomas Thrainer | - disconnect from the network
|
550 | 87e25be1 | Thomas Thrainer | - change disks into single-master mode
|
551 | 87e25be1 | Thomas Thrainer | - wait again until disks are fully synchronized
|
552 | 87e25be1 | Thomas Thrainer |
|
553 | 87e25be1 | Thomas Thrainer | """
|
554 | 87e25be1 | Thomas Thrainer | # check running on only one node
|
555 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* checking where the instance actually runs" |
556 | 87e25be1 | Thomas Thrainer | " (if this hangs, the hypervisor might be in"
|
557 | 87e25be1 | Thomas Thrainer | " a bad state)")
|
558 | 8ac806e6 | Helga Velroyen | cluster_hvparams = self.cfg.GetClusterInfo().hvparams
|
559 | 1c3231aa | Thomas Thrainer | ins_l = self.rpc.call_instance_list(self.all_node_uuids, |
560 | d0d7d7cf | Thomas Thrainer | [self.instance.hypervisor],
|
561 | 8ac806e6 | Helga Velroyen | cluster_hvparams) |
562 | 1c3231aa | Thomas Thrainer | for node_uuid, result in ins_l.items(): |
563 | 1c3231aa | Thomas Thrainer | result.Raise("Can't contact node %s" % node_uuid)
|
564 | 87e25be1 | Thomas Thrainer | |
565 | d0d7d7cf | Thomas Thrainer | runningon_source = self.instance.name in \ |
566 | d0d7d7cf | Thomas Thrainer | ins_l[self.source_node_uuid].payload
|
567 | d0d7d7cf | Thomas Thrainer | runningon_target = self.instance.name in \ |
568 | d0d7d7cf | Thomas Thrainer | ins_l[self.target_node_uuid].payload
|
569 | 87e25be1 | Thomas Thrainer | |
570 | 87e25be1 | Thomas Thrainer | if runningon_source and runningon_target: |
571 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Instance seems to be running on two nodes," |
572 | 87e25be1 | Thomas Thrainer | " or the hypervisor is confused; you will have"
|
573 | 87e25be1 | Thomas Thrainer | " to ensure manually that it runs only on one"
|
574 | 87e25be1 | Thomas Thrainer | " and restart this operation")
|
575 | 87e25be1 | Thomas Thrainer | |
576 | 87e25be1 | Thomas Thrainer | if not (runningon_source or runningon_target): |
577 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Instance does not seem to be running at all;" |
578 | 87e25be1 | Thomas Thrainer | " in this case it's safer to repair by"
|
579 | 87e25be1 | Thomas Thrainer | " running 'gnt-instance stop' to ensure disk"
|
580 | 87e25be1 | Thomas Thrainer | " shutdown, and then restarting it")
|
581 | 87e25be1 | Thomas Thrainer | |
582 | 87e25be1 | Thomas Thrainer | if runningon_target:
|
583 | 87e25be1 | Thomas Thrainer | # the migration has actually succeeded, we need to update the config
|
584 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* instance running on secondary node (%s)," |
585 | 1c3231aa | Thomas Thrainer | " updating config" %
|
586 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid)) |
587 | d0d7d7cf | Thomas Thrainer | self.instance.primary_node = self.target_node_uuid |
588 | d0d7d7cf | Thomas Thrainer | self.cfg.Update(self.instance, self.feedback_fn) |
589 | d0d7d7cf | Thomas Thrainer | demoted_node_uuid = self.source_node_uuid
|
590 | 87e25be1 | Thomas Thrainer | else:
|
591 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* instance confirmed to be running on its" |
592 | 1c3231aa | Thomas Thrainer | " primary node (%s)" %
|
593 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.source_node_uuid)) |
594 | d0d7d7cf | Thomas Thrainer | demoted_node_uuid = self.target_node_uuid
|
595 | 87e25be1 | Thomas Thrainer | |
596 | d0d7d7cf | Thomas Thrainer | if self.instance.disk_template in constants.DTS_INT_MIRROR: |
597 | 1c3231aa | Thomas Thrainer | self._EnsureSecondary(demoted_node_uuid)
|
598 | 87e25be1 | Thomas Thrainer | try:
|
599 | 87e25be1 | Thomas Thrainer | self._WaitUntilSync()
|
600 | 87e25be1 | Thomas Thrainer | except errors.OpExecError:
|
601 | 87e25be1 | Thomas Thrainer | # we ignore here errors, since if the device is standalone, it
|
602 | 87e25be1 | Thomas Thrainer | # won't be able to sync
|
603 | 87e25be1 | Thomas Thrainer | pass
|
604 | 87e25be1 | Thomas Thrainer | self._GoStandalone()
|
605 | 87e25be1 | Thomas Thrainer | self._GoReconnect(False) |
606 | 87e25be1 | Thomas Thrainer | self._WaitUntilSync()
|
607 | 87e25be1 | Thomas Thrainer | |
608 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* done") |
609 | 87e25be1 | Thomas Thrainer | |
610 | 87e25be1 | Thomas Thrainer | def _RevertDiskStatus(self): |
611 | 87e25be1 | Thomas Thrainer | """Try to revert the disk status after a failed migration.
|
612 | 87e25be1 | Thomas Thrainer |
|
613 | 87e25be1 | Thomas Thrainer | """
|
614 | 87e25be1 | Thomas Thrainer | if self.instance.disk_template in constants.DTS_EXT_MIRROR: |
615 | 87e25be1 | Thomas Thrainer | return
|
616 | 87e25be1 | Thomas Thrainer | |
617 | 87e25be1 | Thomas Thrainer | try:
|
618 | 1c3231aa | Thomas Thrainer | self._EnsureSecondary(self.target_node_uuid) |
619 | 87e25be1 | Thomas Thrainer | self._GoStandalone()
|
620 | 87e25be1 | Thomas Thrainer | self._GoReconnect(False) |
621 | 87e25be1 | Thomas Thrainer | self._WaitUntilSync()
|
622 | 87e25be1 | Thomas Thrainer | except errors.OpExecError, err:
|
623 | 87e25be1 | Thomas Thrainer | self.lu.LogWarning("Migration failed and I can't reconnect the drives," |
624 | 87e25be1 | Thomas Thrainer | " please try to recover the instance manually;"
|
625 | 87e25be1 | Thomas Thrainer | " error '%s'" % str(err)) |
626 | 87e25be1 | Thomas Thrainer | |
627 | 87e25be1 | Thomas Thrainer | def _AbortMigration(self): |
628 | 87e25be1 | Thomas Thrainer | """Call the hypervisor code to abort a started migration.
|
629 | 87e25be1 | Thomas Thrainer |
|
630 | 87e25be1 | Thomas Thrainer | """
|
631 | 1c3231aa | Thomas Thrainer | abort_result = self.rpc.call_instance_finalize_migration_dst(
|
632 | d0d7d7cf | Thomas Thrainer | self.target_node_uuid, self.instance, self.migration_info, |
633 | d0d7d7cf | Thomas Thrainer | False)
|
634 | 87e25be1 | Thomas Thrainer | abort_msg = abort_result.fail_msg |
635 | 87e25be1 | Thomas Thrainer | if abort_msg:
|
636 | 87e25be1 | Thomas Thrainer | logging.error("Aborting migration failed on target node %s: %s",
|
637 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid), abort_msg) |
638 | 87e25be1 | Thomas Thrainer | # Don't raise an exception here, as we stil have to try to revert the
|
639 | 87e25be1 | Thomas Thrainer | # disk status, even if this step failed.
|
640 | 87e25be1 | Thomas Thrainer | |
641 | 87e25be1 | Thomas Thrainer | abort_result = self.rpc.call_instance_finalize_migration_src(
|
642 | d0d7d7cf | Thomas Thrainer | self.source_node_uuid, self.instance, False, self.live) |
643 | 87e25be1 | Thomas Thrainer | abort_msg = abort_result.fail_msg |
644 | 87e25be1 | Thomas Thrainer | if abort_msg:
|
645 | 87e25be1 | Thomas Thrainer | logging.error("Aborting migration failed on source node %s: %s",
|
646 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(self.source_node_uuid), abort_msg) |
647 | 87e25be1 | Thomas Thrainer | |
648 | 87e25be1 | Thomas Thrainer | def _ExecMigration(self): |
649 | 87e25be1 | Thomas Thrainer | """Migrate an instance.
|
650 | 87e25be1 | Thomas Thrainer |
|
651 | 87e25be1 | Thomas Thrainer | The migrate is done by:
|
652 | 87e25be1 | Thomas Thrainer | - change the disks into dual-master mode
|
653 | 87e25be1 | Thomas Thrainer | - wait until disks are fully synchronized again
|
654 | 87e25be1 | Thomas Thrainer | - migrate the instance
|
655 | 87e25be1 | Thomas Thrainer | - change disks on the new secondary node (the old primary) to secondary
|
656 | 87e25be1 | Thomas Thrainer | - wait until disks are fully synchronized
|
657 | 87e25be1 | Thomas Thrainer | - change disks into single-master mode
|
658 | 87e25be1 | Thomas Thrainer |
|
659 | 87e25be1 | Thomas Thrainer | """
|
660 | 87e25be1 | Thomas Thrainer | # Check for hypervisor version mismatch and warn the user.
|
661 | d0d7d7cf | Thomas Thrainer | hvspecs = [(self.instance.hypervisor,
|
662 | d0d7d7cf | Thomas Thrainer | self.cfg.GetClusterInfo().hvparams[self.instance.hypervisor])] |
663 | d0d7d7cf | Thomas Thrainer | nodeinfo = self.rpc.call_node_info(
|
664 | da803ff1 | Helga Velroyen | [self.source_node_uuid, self.target_node_uuid], None, hvspecs) |
665 | 87e25be1 | Thomas Thrainer | for ninfo in nodeinfo.values(): |
666 | 87e25be1 | Thomas Thrainer | ninfo.Raise("Unable to retrieve node information from node '%s'" %
|
667 | 87e25be1 | Thomas Thrainer | ninfo.node) |
668 | d0d7d7cf | Thomas Thrainer | (_, _, (src_info, )) = nodeinfo[self.source_node_uuid].payload
|
669 | d0d7d7cf | Thomas Thrainer | (_, _, (dst_info, )) = nodeinfo[self.target_node_uuid].payload
|
670 | 87e25be1 | Thomas Thrainer | |
671 | 87e25be1 | Thomas Thrainer | if ((constants.HV_NODEINFO_KEY_VERSION in src_info) and |
672 | 87e25be1 | Thomas Thrainer | (constants.HV_NODEINFO_KEY_VERSION in dst_info)):
|
673 | 87e25be1 | Thomas Thrainer | src_version = src_info[constants.HV_NODEINFO_KEY_VERSION] |
674 | 87e25be1 | Thomas Thrainer | dst_version = dst_info[constants.HV_NODEINFO_KEY_VERSION] |
675 | 87e25be1 | Thomas Thrainer | if src_version != dst_version:
|
676 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* warning: hypervisor version mismatch between" |
677 | 87e25be1 | Thomas Thrainer | " source (%s) and target (%s) node" %
|
678 | 87e25be1 | Thomas Thrainer | (src_version, dst_version)) |
679 | 87e25be1 | Thomas Thrainer | |
680 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* checking disk consistency between source and target") |
681 | d0d7d7cf | Thomas Thrainer | for (idx, dev) in enumerate(self.instance.disks): |
682 | d0d7d7cf | Thomas Thrainer | if not CheckDiskConsistency(self.lu, self.instance, dev, |
683 | d0d7d7cf | Thomas Thrainer | self.target_node_uuid,
|
684 | 1c3231aa | Thomas Thrainer | False):
|
685 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Disk %s is degraded or not fully" |
686 | 87e25be1 | Thomas Thrainer | " synchronized on target node,"
|
687 | 87e25be1 | Thomas Thrainer | " aborting migration" % idx)
|
688 | 87e25be1 | Thomas Thrainer | |
689 | 87e25be1 | Thomas Thrainer | if self.current_mem > self.tgt_free_mem: |
690 | 87e25be1 | Thomas Thrainer | if not self.allow_runtime_changes: |
691 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Memory ballooning not allowed and not enough" |
692 | 87e25be1 | Thomas Thrainer | " free memory to fit instance %s on target"
|
693 | 87e25be1 | Thomas Thrainer | " node %s (have %dMB, need %dMB)" %
|
694 | d0d7d7cf | Thomas Thrainer | (self.instance.name,
|
695 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid), |
696 | 87e25be1 | Thomas Thrainer | self.tgt_free_mem, self.current_mem)) |
697 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* setting instance memory to %s" % self.tgt_free_mem) |
698 | d0d7d7cf | Thomas Thrainer | rpcres = self.rpc.call_instance_balloon_memory(self.instance.primary_node, |
699 | d0d7d7cf | Thomas Thrainer | self.instance,
|
700 | 87e25be1 | Thomas Thrainer | self.tgt_free_mem)
|
701 | 87e25be1 | Thomas Thrainer | rpcres.Raise("Cannot modify instance runtime memory")
|
702 | 87e25be1 | Thomas Thrainer | |
703 | 87e25be1 | Thomas Thrainer | # First get the migration information from the remote node
|
704 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_migration_info(self.source_node_uuid, self.instance) |
705 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
706 | 87e25be1 | Thomas Thrainer | if msg:
|
707 | 87e25be1 | Thomas Thrainer | log_err = ("Failed fetching source migration information from %s: %s" %
|
708 | d0d7d7cf | Thomas Thrainer | (self.cfg.GetNodeName(self.source_node_uuid), msg)) |
709 | 87e25be1 | Thomas Thrainer | logging.error(log_err) |
710 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError(log_err)
|
711 | 87e25be1 | Thomas Thrainer | |
712 | 87e25be1 | Thomas Thrainer | self.migration_info = migration_info = result.payload
|
713 | 87e25be1 | Thomas Thrainer | |
714 | 87e25be1 | Thomas Thrainer | if self.instance.disk_template not in constants.DTS_EXT_MIRROR: |
715 | 87e25be1 | Thomas Thrainer | # Then switch the disks to master/master mode
|
716 | d0d7d7cf | Thomas Thrainer | self._EnsureSecondary(self.target_node_uuid) |
717 | 87e25be1 | Thomas Thrainer | self._GoStandalone()
|
718 | 87e25be1 | Thomas Thrainer | self._GoReconnect(True) |
719 | 87e25be1 | Thomas Thrainer | self._WaitUntilSync()
|
720 | 87e25be1 | Thomas Thrainer | |
721 | 1c3231aa | Thomas Thrainer | self.feedback_fn("* preparing %s to accept the instance" % |
722 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid)) |
723 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_accept_instance(self.target_node_uuid, |
724 | d0d7d7cf | Thomas Thrainer | self.instance,
|
725 | 87e25be1 | Thomas Thrainer | migration_info, |
726 | d0d7d7cf | Thomas Thrainer | self.nodes_ip[self.target_node_uuid]) |
727 | 87e25be1 | Thomas Thrainer | |
728 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
729 | 87e25be1 | Thomas Thrainer | if msg:
|
730 | 87e25be1 | Thomas Thrainer | logging.error("Instance pre-migration failed, trying to revert"
|
731 | 87e25be1 | Thomas Thrainer | " disk status: %s", msg)
|
732 | 87e25be1 | Thomas Thrainer | self.feedback_fn("Pre-migration failed, aborting") |
733 | 87e25be1 | Thomas Thrainer | self._AbortMigration()
|
734 | 87e25be1 | Thomas Thrainer | self._RevertDiskStatus()
|
735 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Could not pre-migrate instance %s: %s" % |
736 | d0d7d7cf | Thomas Thrainer | (self.instance.name, msg))
|
737 | 87e25be1 | Thomas Thrainer | |
738 | 1c3231aa | Thomas Thrainer | self.feedback_fn("* migrating instance to %s" % |
739 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid)) |
740 | bc0a2284 | Helga Velroyen | cluster = self.cfg.GetClusterInfo()
|
741 | bc0a2284 | Helga Velroyen | result = self.rpc.call_instance_migrate(
|
742 | d0d7d7cf | Thomas Thrainer | self.source_node_uuid, cluster.cluster_name, self.instance, |
743 | d0d7d7cf | Thomas Thrainer | self.nodes_ip[self.target_node_uuid], self.live) |
744 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
745 | 87e25be1 | Thomas Thrainer | if msg:
|
746 | 87e25be1 | Thomas Thrainer | logging.error("Instance migration failed, trying to revert"
|
747 | 87e25be1 | Thomas Thrainer | " disk status: %s", msg)
|
748 | 87e25be1 | Thomas Thrainer | self.feedback_fn("Migration failed, aborting") |
749 | 87e25be1 | Thomas Thrainer | self._AbortMigration()
|
750 | 87e25be1 | Thomas Thrainer | self._RevertDiskStatus()
|
751 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Could not migrate instance %s: %s" % |
752 | d0d7d7cf | Thomas Thrainer | (self.instance.name, msg))
|
753 | 87e25be1 | Thomas Thrainer | |
754 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* starting memory transfer") |
755 | 87e25be1 | Thomas Thrainer | last_feedback = time.time() |
756 | 87e25be1 | Thomas Thrainer | while True: |
757 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_instance_get_migration_status(
|
758 | d0d7d7cf | Thomas Thrainer | self.source_node_uuid, self.instance) |
759 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
760 | 87e25be1 | Thomas Thrainer | ms = result.payload # MigrationStatus instance
|
761 | 87e25be1 | Thomas Thrainer | if msg or (ms.status in constants.HV_MIGRATION_FAILED_STATUSES): |
762 | 87e25be1 | Thomas Thrainer | logging.error("Instance migration failed, trying to revert"
|
763 | 87e25be1 | Thomas Thrainer | " disk status: %s", msg)
|
764 | 87e25be1 | Thomas Thrainer | self.feedback_fn("Migration failed, aborting") |
765 | 87e25be1 | Thomas Thrainer | self._AbortMigration()
|
766 | 87e25be1 | Thomas Thrainer | self._RevertDiskStatus()
|
767 | 87e25be1 | Thomas Thrainer | if not msg: |
768 | 87e25be1 | Thomas Thrainer | msg = "hypervisor returned failure"
|
769 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Could not migrate instance %s: %s" % |
770 | d0d7d7cf | Thomas Thrainer | (self.instance.name, msg))
|
771 | 87e25be1 | Thomas Thrainer | |
772 | 87e25be1 | Thomas Thrainer | if result.payload.status != constants.HV_MIGRATION_ACTIVE:
|
773 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* memory transfer complete") |
774 | 87e25be1 | Thomas Thrainer | break
|
775 | 87e25be1 | Thomas Thrainer | |
776 | 87e25be1 | Thomas Thrainer | if (utils.TimeoutExpired(last_feedback,
|
777 | 87e25be1 | Thomas Thrainer | self._MIGRATION_FEEDBACK_INTERVAL) and |
778 | 87e25be1 | Thomas Thrainer | ms.transferred_ram is not None): |
779 | 87e25be1 | Thomas Thrainer | mem_progress = 100 * float(ms.transferred_ram) / float(ms.total_ram) |
780 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* memory transfer progress: %.2f %%" % mem_progress) |
781 | 87e25be1 | Thomas Thrainer | last_feedback = time.time() |
782 | 87e25be1 | Thomas Thrainer | |
783 | 87e25be1 | Thomas Thrainer | time.sleep(self._MIGRATION_POLL_INTERVAL)
|
784 | 87e25be1 | Thomas Thrainer | |
785 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_instance_finalize_migration_src(
|
786 | d0d7d7cf | Thomas Thrainer | self.source_node_uuid, self.instance, True, self.live) |
787 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
788 | 87e25be1 | Thomas Thrainer | if msg:
|
789 | 87e25be1 | Thomas Thrainer | logging.error("Instance migration succeeded, but finalization failed"
|
790 | 87e25be1 | Thomas Thrainer | " on the source node: %s", msg)
|
791 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Could not finalize instance migration: %s" % |
792 | 87e25be1 | Thomas Thrainer | msg) |
793 | 87e25be1 | Thomas Thrainer | |
794 | d0d7d7cf | Thomas Thrainer | self.instance.primary_node = self.target_node_uuid |
795 | 87e25be1 | Thomas Thrainer | |
796 | 87e25be1 | Thomas Thrainer | # distribute new instance config to the other nodes
|
797 | d0d7d7cf | Thomas Thrainer | self.cfg.Update(self.instance, self.feedback_fn) |
798 | 87e25be1 | Thomas Thrainer | |
799 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_instance_finalize_migration_dst(
|
800 | d0d7d7cf | Thomas Thrainer | self.target_node_uuid, self.instance, migration_info, True) |
801 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
802 | 87e25be1 | Thomas Thrainer | if msg:
|
803 | 87e25be1 | Thomas Thrainer | logging.error("Instance migration succeeded, but finalization failed"
|
804 | 87e25be1 | Thomas Thrainer | " on the target node: %s", msg)
|
805 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Could not finalize instance migration: %s" % |
806 | 87e25be1 | Thomas Thrainer | msg) |
807 | 87e25be1 | Thomas Thrainer | |
808 | 87e25be1 | Thomas Thrainer | if self.instance.disk_template not in constants.DTS_EXT_MIRROR: |
809 | d0d7d7cf | Thomas Thrainer | self._EnsureSecondary(self.source_node_uuid) |
810 | 87e25be1 | Thomas Thrainer | self._WaitUntilSync()
|
811 | 87e25be1 | Thomas Thrainer | self._GoStandalone()
|
812 | 87e25be1 | Thomas Thrainer | self._GoReconnect(False) |
813 | 87e25be1 | Thomas Thrainer | self._WaitUntilSync()
|
814 | 87e25be1 | Thomas Thrainer | |
815 | 87e25be1 | Thomas Thrainer | # If the instance's disk template is `rbd' or `ext' and there was a
|
816 | 87e25be1 | Thomas Thrainer | # successful migration, unmap the device from the source node.
|
817 | 87e25be1 | Thomas Thrainer | if self.instance.disk_template in (constants.DT_RBD, constants.DT_EXT): |
818 | d0d7d7cf | Thomas Thrainer | disks = ExpandCheckDisks(self.instance, self.instance.disks) |
819 | 1c3231aa | Thomas Thrainer | self.feedback_fn("* unmapping instance's disks from %s" % |
820 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.source_node_uuid)) |
821 | 87e25be1 | Thomas Thrainer | for disk in disks: |
822 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_blockdev_shutdown(self.source_node_uuid, |
823 | d0d7d7cf | Thomas Thrainer | (disk, self.instance))
|
824 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
825 | 87e25be1 | Thomas Thrainer | if msg:
|
826 | 87e25be1 | Thomas Thrainer | logging.error("Migration was successful, but couldn't unmap the"
|
827 | 87e25be1 | Thomas Thrainer | " block device %s on source node %s: %s",
|
828 | d0d7d7cf | Thomas Thrainer | disk.iv_name, |
829 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.source_node_uuid), msg) |
830 | 87e25be1 | Thomas Thrainer | logging.error("You need to unmap the device %s manually on %s",
|
831 | d0d7d7cf | Thomas Thrainer | disk.iv_name, |
832 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.source_node_uuid)) |
833 | 87e25be1 | Thomas Thrainer | |
834 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* done") |
835 | 87e25be1 | Thomas Thrainer | |
836 | 87e25be1 | Thomas Thrainer | def _ExecFailover(self): |
837 | 87e25be1 | Thomas Thrainer | """Failover an instance.
|
838 | 87e25be1 | Thomas Thrainer |
|
839 | 87e25be1 | Thomas Thrainer | The failover is done by shutting it down on its present node and
|
840 | 87e25be1 | Thomas Thrainer | starting it on the secondary.
|
841 | 87e25be1 | Thomas Thrainer |
|
842 | 87e25be1 | Thomas Thrainer | """
|
843 | d0d7d7cf | Thomas Thrainer | primary_node = self.cfg.GetNodeInfo(self.instance.primary_node) |
844 | 87e25be1 | Thomas Thrainer | |
845 | d0d7d7cf | Thomas Thrainer | source_node_uuid = self.instance.primary_node
|
846 | 87e25be1 | Thomas Thrainer | |
847 | d0d7d7cf | Thomas Thrainer | if self.instance.disks_active: |
848 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* checking disk consistency between source and target") |
849 | d0d7d7cf | Thomas Thrainer | for (idx, dev) in enumerate(self.instance.disks): |
850 | 87e25be1 | Thomas Thrainer | # for drbd, these are drbd over lvm
|
851 | d0d7d7cf | Thomas Thrainer | if not CheckDiskConsistency(self.lu, self.instance, dev, |
852 | d0d7d7cf | Thomas Thrainer | self.target_node_uuid, False): |
853 | 87e25be1 | Thomas Thrainer | if primary_node.offline:
|
854 | 87e25be1 | Thomas Thrainer | self.feedback_fn("Node %s is offline, ignoring degraded disk %s on" |
855 | 87e25be1 | Thomas Thrainer | " target node %s" %
|
856 | 1c3231aa | Thomas Thrainer | (primary_node.name, idx, |
857 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid))) |
858 | 87e25be1 | Thomas Thrainer | elif not self.ignore_consistency: |
859 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Disk %s is degraded on target node," |
860 | 87e25be1 | Thomas Thrainer | " aborting failover" % idx)
|
861 | 87e25be1 | Thomas Thrainer | else:
|
862 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* not checking disk consistency as instance is not" |
863 | 87e25be1 | Thomas Thrainer | " running")
|
864 | 87e25be1 | Thomas Thrainer | |
865 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* shutting down instance on source node") |
866 | 87e25be1 | Thomas Thrainer | logging.info("Shutting down instance %s on node %s",
|
867 | d0d7d7cf | Thomas Thrainer | self.instance.name, self.cfg.GetNodeName(source_node_uuid)) |
868 | 87e25be1 | Thomas Thrainer | |
869 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_instance_shutdown(source_node_uuid, self.instance, |
870 | 87e25be1 | Thomas Thrainer | self.shutdown_timeout,
|
871 | 87e25be1 | Thomas Thrainer | self.lu.op.reason)
|
872 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
873 | 87e25be1 | Thomas Thrainer | if msg:
|
874 | 87e25be1 | Thomas Thrainer | if self.ignore_consistency or primary_node.offline: |
875 | 87e25be1 | Thomas Thrainer | self.lu.LogWarning("Could not shutdown instance %s on node %s," |
876 | 87e25be1 | Thomas Thrainer | " proceeding anyway; please make sure node"
|
877 | 87e25be1 | Thomas Thrainer | " %s is down; error details: %s",
|
878 | d0d7d7cf | Thomas Thrainer | self.instance.name,
|
879 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(source_node_uuid),
|
880 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(source_node_uuid), msg)
|
881 | 87e25be1 | Thomas Thrainer | else:
|
882 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Could not shutdown instance %s on" |
883 | 87e25be1 | Thomas Thrainer | " node %s: %s" %
|
884 | d0d7d7cf | Thomas Thrainer | (self.instance.name,
|
885 | 1c3231aa | Thomas Thrainer | self.cfg.GetNodeName(source_node_uuid), msg))
|
886 | 87e25be1 | Thomas Thrainer | |
887 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* deactivating the instance's disks on source node") |
888 | d0d7d7cf | Thomas Thrainer | if not ShutdownInstanceDisks(self.lu, self.instance, ignore_primary=True): |
889 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Can't shut down the instance's disks") |
890 | 87e25be1 | Thomas Thrainer | |
891 | d0d7d7cf | Thomas Thrainer | self.instance.primary_node = self.target_node_uuid |
892 | 87e25be1 | Thomas Thrainer | # distribute new instance config to the other nodes
|
893 | d0d7d7cf | Thomas Thrainer | self.cfg.Update(self.instance, self.feedback_fn) |
894 | 87e25be1 | Thomas Thrainer | |
895 | 87e25be1 | Thomas Thrainer | # Only start the instance if it's marked as up
|
896 | d0d7d7cf | Thomas Thrainer | if self.instance.admin_state == constants.ADMINST_UP: |
897 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* activating the instance's disks on target node %s" % |
898 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid)) |
899 | d0d7d7cf | Thomas Thrainer | logging.info("Starting instance %s on node %s", self.instance.name, |
900 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid)) |
901 | 87e25be1 | Thomas Thrainer | |
902 | d0d7d7cf | Thomas Thrainer | disks_ok, _ = AssembleInstanceDisks(self.lu, self.instance, |
903 | 5eacbcae | Thomas Thrainer | ignore_secondaries=True)
|
904 | 87e25be1 | Thomas Thrainer | if not disks_ok: |
905 | d0d7d7cf | Thomas Thrainer | ShutdownInstanceDisks(self.lu, self.instance) |
906 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Can't activate the instance's disks") |
907 | 87e25be1 | Thomas Thrainer | |
908 | 87e25be1 | Thomas Thrainer | self.feedback_fn("* starting the instance on the target node %s" % |
909 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid)) |
910 | d0d7d7cf | Thomas Thrainer | result = self.rpc.call_instance_start(self.target_node_uuid, |
911 | d0d7d7cf | Thomas Thrainer | (self.instance, None, None), False, |
912 | 1c3231aa | Thomas Thrainer | self.lu.op.reason)
|
913 | 87e25be1 | Thomas Thrainer | msg = result.fail_msg |
914 | 87e25be1 | Thomas Thrainer | if msg:
|
915 | d0d7d7cf | Thomas Thrainer | ShutdownInstanceDisks(self.lu, self.instance) |
916 | 87e25be1 | Thomas Thrainer | raise errors.OpExecError("Could not start instance %s on node %s: %s" % |
917 | d0d7d7cf | Thomas Thrainer | (self.instance.name,
|
918 | d0d7d7cf | Thomas Thrainer | self.cfg.GetNodeName(self.target_node_uuid), |
919 | d0d7d7cf | Thomas Thrainer | msg)) |
920 | 87e25be1 | Thomas Thrainer | |
921 | 87e25be1 | Thomas Thrainer | def Exec(self, feedback_fn): |
922 | 87e25be1 | Thomas Thrainer | """Perform the migration.
|
923 | 87e25be1 | Thomas Thrainer |
|
924 | 87e25be1 | Thomas Thrainer | """
|
925 | 87e25be1 | Thomas Thrainer | self.feedback_fn = feedback_fn
|
926 | 1c3231aa | Thomas Thrainer | self.source_node_uuid = self.instance.primary_node |
927 | 87e25be1 | Thomas Thrainer | |
928 | 87e25be1 | Thomas Thrainer | # FIXME: if we implement migrate-to-any in DRBD, this needs fixing
|
929 | 87e25be1 | Thomas Thrainer | if self.instance.disk_template in constants.DTS_INT_MIRROR: |
930 | 1c3231aa | Thomas Thrainer | self.target_node_uuid = self.instance.secondary_nodes[0] |
931 | 87e25be1 | Thomas Thrainer | # Otherwise self.target_node has been populated either
|
932 | 87e25be1 | Thomas Thrainer | # directly, or through an iallocator.
|
933 | 87e25be1 | Thomas Thrainer | |
934 | 1c3231aa | Thomas Thrainer | self.all_node_uuids = [self.source_node_uuid, self.target_node_uuid] |
935 | 1c3231aa | Thomas Thrainer | self.nodes_ip = dict((uuid, node.secondary_ip) for (uuid, node) |
936 | 1c3231aa | Thomas Thrainer | in self.cfg.GetMultiNodeInfo(self.all_node_uuids)) |
937 | 87e25be1 | Thomas Thrainer | |
938 | 87e25be1 | Thomas Thrainer | if self.failover: |
939 | 87e25be1 | Thomas Thrainer | feedback_fn("Failover instance %s" % self.instance.name) |
940 | 87e25be1 | Thomas Thrainer | self._ExecFailover()
|
941 | 87e25be1 | Thomas Thrainer | else:
|
942 | 87e25be1 | Thomas Thrainer | feedback_fn("Migrating instance %s" % self.instance.name) |
943 | 87e25be1 | Thomas Thrainer | |
944 | 87e25be1 | Thomas Thrainer | if self.cleanup: |
945 | 87e25be1 | Thomas Thrainer | return self._ExecCleanup() |
946 | 87e25be1 | Thomas Thrainer | else:
|
947 | 87e25be1 | Thomas Thrainer | return self._ExecMigration() |