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1 | a8083063 | Iustin Pop | #!/usr/bin/python
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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
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5 | a8083063 | Iustin Pop | #
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6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | a8083063 | Iustin Pop | # (at your option) any later version.
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10 | a8083063 | Iustin Pop | #
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11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | a8083063 | Iustin Pop | # General Public License for more details.
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15 | a8083063 | Iustin Pop | #
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16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | a8083063 | Iustin Pop | # 02110-1301, USA.
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20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | a8083063 | Iustin Pop | """Configuration management for Ganeti
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23 | a8083063 | Iustin Pop |
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24 | 319856a9 | Michael Hanselmann | This module provides the interface to the Ganeti cluster configuration.
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25 | a8083063 | Iustin Pop |
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26 | 319856a9 | Michael Hanselmann | The configuration data is stored on every node but is updated on the master
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27 | 319856a9 | Michael Hanselmann | only. After each update, the master distributes the data to the other nodes.
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28 | a8083063 | Iustin Pop |
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29 | 319856a9 | Michael Hanselmann | Currently, the data storage format is JSON. YAML was slow and consuming too
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30 | 319856a9 | Michael Hanselmann | much memory.
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31 | a8083063 | Iustin Pop |
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32 | a8083063 | Iustin Pop | """
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33 | a8083063 | Iustin Pop | |
34 | a8083063 | Iustin Pop | import os |
35 | a8083063 | Iustin Pop | import tempfile |
36 | a8083063 | Iustin Pop | import random |
37 | a8083063 | Iustin Pop | |
38 | a8083063 | Iustin Pop | from ganeti import errors |
39 | a8083063 | Iustin Pop | from ganeti import logger |
40 | a8083063 | Iustin Pop | from ganeti import utils |
41 | a8083063 | Iustin Pop | from ganeti import constants |
42 | a8083063 | Iustin Pop | from ganeti import rpc |
43 | a8083063 | Iustin Pop | from ganeti import objects |
44 | a8083063 | Iustin Pop | |
45 | 319856a9 | Michael Hanselmann | |
46 | 923b1523 | Iustin Pop | def _my_uuidgen(): |
47 | 923b1523 | Iustin Pop | """Poor-man's uuidgen using the uuidgen binary.
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48 | 923b1523 | Iustin Pop |
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49 | 923b1523 | Iustin Pop | """
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50 | 923b1523 | Iustin Pop | result = utils.RunCmd(["uuidgen", "-r"]) |
51 | 923b1523 | Iustin Pop | if result.failed:
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52 | 923b1523 | Iustin Pop | return None |
53 | 923b1523 | Iustin Pop | return result.stdout.rstrip('\n') |
54 | 923b1523 | Iustin Pop | |
55 | 923b1523 | Iustin Pop | |
56 | 923b1523 | Iustin Pop | try:
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57 | 923b1523 | Iustin Pop | import uuid |
58 | 923b1523 | Iustin Pop | _uuidgen = uuid.uuid4 |
59 | 923b1523 | Iustin Pop | except ImportError: |
60 | 923b1523 | Iustin Pop | _uuidgen = _my_uuidgen |
61 | 923b1523 | Iustin Pop | |
62 | a8083063 | Iustin Pop | |
63 | a8083063 | Iustin Pop | class ConfigWriter: |
64 | 098c0958 | Michael Hanselmann | """The interface to the cluster configuration.
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65 | a8083063 | Iustin Pop |
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66 | 098c0958 | Michael Hanselmann | """
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67 | a8083063 | Iustin Pop | def __init__(self, cfg_file=None, offline=False): |
68 | a8083063 | Iustin Pop | self._config_data = None |
69 | a8083063 | Iustin Pop | self._config_time = None |
70 | 264bb3c5 | Michael Hanselmann | self._config_size = None |
71 | 264bb3c5 | Michael Hanselmann | self._config_inode = None |
72 | a8083063 | Iustin Pop | self._offline = offline
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73 | a8083063 | Iustin Pop | if cfg_file is None: |
74 | a8083063 | Iustin Pop | self._cfg_file = constants.CLUSTER_CONF_FILE
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75 | a8083063 | Iustin Pop | else:
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76 | a8083063 | Iustin Pop | self._cfg_file = cfg_file
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77 | 923b1523 | Iustin Pop | self._temporary_ids = set() |
78 | 89e1fc26 | Iustin Pop | # Note: in order to prevent errors when resolving our name in
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79 | 89e1fc26 | Iustin Pop | # _DistributeConfig, we compute it here once and reuse it; it's
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80 | 89e1fc26 | Iustin Pop | # better to raise an error before starting to modify the config
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81 | 89e1fc26 | Iustin Pop | # file than after it was modified
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82 | 89e1fc26 | Iustin Pop | self._my_hostname = utils.HostInfo().name
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83 | a8083063 | Iustin Pop | |
84 | a8083063 | Iustin Pop | # this method needs to be static, so that we can call it on the class
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85 | a8083063 | Iustin Pop | @staticmethod
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86 | a8083063 | Iustin Pop | def IsCluster(): |
87 | a8083063 | Iustin Pop | """Check if the cluster is configured.
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88 | a8083063 | Iustin Pop |
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89 | a8083063 | Iustin Pop | """
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90 | a8083063 | Iustin Pop | return os.path.exists(constants.CLUSTER_CONF_FILE)
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91 | a8083063 | Iustin Pop | |
92 | a8083063 | Iustin Pop | def GenerateMAC(self): |
93 | a8083063 | Iustin Pop | """Generate a MAC for an instance.
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94 | a8083063 | Iustin Pop |
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95 | a8083063 | Iustin Pop | This should check the current instances for duplicates.
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96 | a8083063 | Iustin Pop |
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97 | a8083063 | Iustin Pop | """
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98 | a8083063 | Iustin Pop | self._OpenConfig()
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99 | a8083063 | Iustin Pop | self._ReleaseLock()
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100 | a8083063 | Iustin Pop | prefix = self._config_data.cluster.mac_prefix
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101 | a8083063 | Iustin Pop | all_macs = self._AllMACs()
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102 | a8083063 | Iustin Pop | retries = 64
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103 | a8083063 | Iustin Pop | while retries > 0: |
104 | a8083063 | Iustin Pop | byte1 = random.randrange(0, 256) |
105 | a8083063 | Iustin Pop | byte2 = random.randrange(0, 256) |
106 | a8083063 | Iustin Pop | byte3 = random.randrange(0, 256) |
107 | a8083063 | Iustin Pop | mac = "%s:%02x:%02x:%02x" % (prefix, byte1, byte2, byte3)
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108 | a8083063 | Iustin Pop | if mac not in all_macs: |
109 | a8083063 | Iustin Pop | break
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110 | a8083063 | Iustin Pop | retries -= 1
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111 | a8083063 | Iustin Pop | else:
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112 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Can't generate unique MAC") |
113 | a8083063 | Iustin Pop | return mac
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114 | a8083063 | Iustin Pop | |
115 | 923b1523 | Iustin Pop | def _ComputeAllLVs(self): |
116 | 923b1523 | Iustin Pop | """Compute the list of all LVs.
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117 | 923b1523 | Iustin Pop |
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118 | 923b1523 | Iustin Pop | """
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119 | 923b1523 | Iustin Pop | self._OpenConfig()
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120 | 923b1523 | Iustin Pop | self._ReleaseLock()
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121 | 923b1523 | Iustin Pop | lvnames = set()
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122 | 923b1523 | Iustin Pop | for instance in self._config_data.instances.values(): |
123 | 923b1523 | Iustin Pop | node_data = instance.MapLVsByNode() |
124 | 923b1523 | Iustin Pop | for lv_list in node_data.values(): |
125 | 923b1523 | Iustin Pop | lvnames.update(lv_list) |
126 | 923b1523 | Iustin Pop | return lvnames
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127 | 923b1523 | Iustin Pop | |
128 | 923b1523 | Iustin Pop | def GenerateUniqueID(self, exceptions=None): |
129 | 923b1523 | Iustin Pop | """Generate an unique disk name.
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130 | 923b1523 | Iustin Pop |
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131 | 923b1523 | Iustin Pop | This checks the current node, instances and disk names for
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132 | 923b1523 | Iustin Pop | duplicates.
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133 | 923b1523 | Iustin Pop |
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134 | 923b1523 | Iustin Pop | Args:
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135 | 923b1523 | Iustin Pop | - exceptions: a list with some other names which should be checked
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136 | 923b1523 | Iustin Pop | for uniqueness (used for example when you want to get
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137 | 923b1523 | Iustin Pop | more than one id at one time without adding each one in
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138 | 923b1523 | Iustin Pop | turn to the config file
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139 | 923b1523 | Iustin Pop |
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140 | 923b1523 | Iustin Pop | Returns: the unique id as a string
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141 | 923b1523 | Iustin Pop |
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142 | 923b1523 | Iustin Pop | """
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143 | 923b1523 | Iustin Pop | existing = set()
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144 | 923b1523 | Iustin Pop | existing.update(self._temporary_ids)
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145 | 923b1523 | Iustin Pop | existing.update(self._ComputeAllLVs())
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146 | 923b1523 | Iustin Pop | existing.update(self._config_data.instances.keys())
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147 | 923b1523 | Iustin Pop | existing.update(self._config_data.nodes.keys())
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148 | 923b1523 | Iustin Pop | if exceptions is not None: |
149 | 923b1523 | Iustin Pop | existing.update(exceptions) |
150 | 923b1523 | Iustin Pop | retries = 64
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151 | 923b1523 | Iustin Pop | while retries > 0: |
152 | 923b1523 | Iustin Pop | unique_id = _uuidgen() |
153 | 923b1523 | Iustin Pop | if unique_id not in existing and unique_id is not None: |
154 | 923b1523 | Iustin Pop | break
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155 | 923b1523 | Iustin Pop | else:
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156 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Not able generate an unique ID" |
157 | 3ecf6786 | Iustin Pop | " (last tried ID: %s" % unique_id)
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158 | 923b1523 | Iustin Pop | self._temporary_ids.add(unique_id)
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159 | 923b1523 | Iustin Pop | return unique_id
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160 | 923b1523 | Iustin Pop | |
161 | a8083063 | Iustin Pop | def _AllMACs(self): |
162 | a8083063 | Iustin Pop | """Return all MACs present in the config.
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163 | a8083063 | Iustin Pop |
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164 | a8083063 | Iustin Pop | """
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165 | a8083063 | Iustin Pop | self._OpenConfig()
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166 | a8083063 | Iustin Pop | self._ReleaseLock()
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167 | a8083063 | Iustin Pop | |
168 | a8083063 | Iustin Pop | result = [] |
169 | a8083063 | Iustin Pop | for instance in self._config_data.instances.values(): |
170 | a8083063 | Iustin Pop | for nic in instance.nics: |
171 | a8083063 | Iustin Pop | result.append(nic.mac) |
172 | a8083063 | Iustin Pop | |
173 | a8083063 | Iustin Pop | return result
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174 | a8083063 | Iustin Pop | |
175 | a8083063 | Iustin Pop | def VerifyConfig(self): |
176 | a8083063 | Iustin Pop | """Stub verify function.
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177 | a8083063 | Iustin Pop | """
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178 | a8083063 | Iustin Pop | self._OpenConfig()
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179 | a8083063 | Iustin Pop | self._ReleaseLock()
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180 | a8083063 | Iustin Pop | |
181 | a8083063 | Iustin Pop | result = [] |
182 | a8083063 | Iustin Pop | seen_macs = [] |
183 | a8083063 | Iustin Pop | data = self._config_data
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184 | a8083063 | Iustin Pop | for instance_name in data.instances: |
185 | a8083063 | Iustin Pop | instance = data.instances[instance_name] |
186 | a8083063 | Iustin Pop | if instance.primary_node not in data.nodes: |
187 | a8083063 | Iustin Pop | result.append("Instance '%s' has invalid primary node '%s'" %
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188 | a8083063 | Iustin Pop | (instance_name, instance.primary_node)) |
189 | a8083063 | Iustin Pop | for snode in instance.secondary_nodes: |
190 | a8083063 | Iustin Pop | if snode not in data.nodes: |
191 | a8083063 | Iustin Pop | result.append("Instance '%s' has invalid secondary node '%s'" %
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192 | a8083063 | Iustin Pop | (instance_name, snode)) |
193 | a8083063 | Iustin Pop | for idx, nic in enumerate(instance.nics): |
194 | a8083063 | Iustin Pop | if nic.mac in seen_macs: |
195 | a8083063 | Iustin Pop | result.append("Instance '%s' has NIC %d mac %s duplicate" %
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196 | a8083063 | Iustin Pop | (instance_name, idx, nic.mac)) |
197 | a8083063 | Iustin Pop | else:
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198 | a8083063 | Iustin Pop | seen_macs.append(nic.mac) |
199 | a8083063 | Iustin Pop | return result
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200 | a8083063 | Iustin Pop | |
201 | a8083063 | Iustin Pop | def SetDiskID(self, disk, node_name): |
202 | a8083063 | Iustin Pop | """Convert the unique ID to the ID needed on the target nodes.
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203 | a8083063 | Iustin Pop |
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204 | a8083063 | Iustin Pop | This is used only for drbd, which needs ip/port configuration.
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205 | a8083063 | Iustin Pop |
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206 | a8083063 | Iustin Pop | The routine descends down and updates its children also, because
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207 | a8083063 | Iustin Pop | this helps when the only the top device is passed to the remote
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208 | a8083063 | Iustin Pop | node.
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209 | a8083063 | Iustin Pop |
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210 | a8083063 | Iustin Pop | """
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211 | a8083063 | Iustin Pop | if disk.children:
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212 | a8083063 | Iustin Pop | for child in disk.children: |
213 | a8083063 | Iustin Pop | self.SetDiskID(child, node_name)
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214 | a8083063 | Iustin Pop | |
215 | a8083063 | Iustin Pop | if disk.logical_id is None and disk.physical_id is not None: |
216 | a8083063 | Iustin Pop | return
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217 | a8083063 | Iustin Pop | if disk.dev_type == "drbd": |
218 | a8083063 | Iustin Pop | pnode, snode, port = disk.logical_id |
219 | a8083063 | Iustin Pop | if node_name not in (pnode, snode): |
220 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("DRBD device not knowing node %s" % |
221 | 3ecf6786 | Iustin Pop | node_name) |
222 | a8083063 | Iustin Pop | pnode_info = self.GetNodeInfo(pnode)
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223 | a8083063 | Iustin Pop | snode_info = self.GetNodeInfo(snode)
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224 | a8083063 | Iustin Pop | if pnode_info is None or snode_info is None: |
225 | a8083063 | Iustin Pop | raise errors.ConfigurationError("Can't find primary or secondary node" |
226 | a8083063 | Iustin Pop | " for %s" % str(disk)) |
227 | a8083063 | Iustin Pop | if pnode == node_name:
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228 | a8083063 | Iustin Pop | disk.physical_id = (pnode_info.secondary_ip, port, |
229 | a8083063 | Iustin Pop | snode_info.secondary_ip, port) |
230 | a8083063 | Iustin Pop | else: # it must be secondary, we tested above |
231 | a8083063 | Iustin Pop | disk.physical_id = (snode_info.secondary_ip, port, |
232 | a8083063 | Iustin Pop | pnode_info.secondary_ip, port) |
233 | a8083063 | Iustin Pop | else:
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234 | a8083063 | Iustin Pop | disk.physical_id = disk.logical_id |
235 | a8083063 | Iustin Pop | return
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236 | a8083063 | Iustin Pop | |
237 | b2fddf63 | Iustin Pop | def AddTcpUdpPort(self, port): |
238 | b2fddf63 | Iustin Pop | """Adds a new port to the available port pool.
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239 | b2fddf63 | Iustin Pop |
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240 | b2fddf63 | Iustin Pop | """
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241 | 264bb3c5 | Michael Hanselmann | if not isinstance(port, int): |
242 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Invalid type passed for port") |
243 | 264bb3c5 | Michael Hanselmann | |
244 | 264bb3c5 | Michael Hanselmann | self._OpenConfig()
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245 | b2fddf63 | Iustin Pop | self._config_data.cluster.tcpudp_port_pool.add(port)
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246 | 264bb3c5 | Michael Hanselmann | self._WriteConfig()
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247 | 264bb3c5 | Michael Hanselmann | |
248 | b2fddf63 | Iustin Pop | def GetPortList(self): |
249 | 264bb3c5 | Michael Hanselmann | """Returns a copy of the current port list.
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250 | 264bb3c5 | Michael Hanselmann |
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251 | 264bb3c5 | Michael Hanselmann | """
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252 | 264bb3c5 | Michael Hanselmann | self._OpenConfig()
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253 | 264bb3c5 | Michael Hanselmann | self._ReleaseLock()
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254 | b2fddf63 | Iustin Pop | return self._config_data.cluster.tcpudp_port_pool.copy() |
255 | 264bb3c5 | Michael Hanselmann | |
256 | a8083063 | Iustin Pop | def AllocatePort(self): |
257 | a8083063 | Iustin Pop | """Allocate a port.
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258 | a8083063 | Iustin Pop |
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259 | b2fddf63 | Iustin Pop | The port will be taken from the available port pool or from the
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260 | b2fddf63 | Iustin Pop | default port range (and in this case we increase
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261 | b2fddf63 | Iustin Pop | highest_used_port).
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262 | a8083063 | Iustin Pop |
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263 | a8083063 | Iustin Pop | """
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264 | a8083063 | Iustin Pop | self._OpenConfig()
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265 | a8083063 | Iustin Pop | |
266 | 264bb3c5 | Michael Hanselmann | # If there are TCP/IP ports configured, we use them first.
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267 | b2fddf63 | Iustin Pop | if self._config_data.cluster.tcpudp_port_pool: |
268 | b2fddf63 | Iustin Pop | port = self._config_data.cluster.tcpudp_port_pool.pop()
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269 | 264bb3c5 | Michael Hanselmann | else:
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270 | 264bb3c5 | Michael Hanselmann | port = self._config_data.cluster.highest_used_port + 1 |
271 | 264bb3c5 | Michael Hanselmann | if port >= constants.LAST_DRBD_PORT:
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272 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("The highest used port is greater" |
273 | 3ecf6786 | Iustin Pop | " than %s. Aborting." %
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274 | 3ecf6786 | Iustin Pop | constants.LAST_DRBD_PORT) |
275 | 264bb3c5 | Michael Hanselmann | self._config_data.cluster.highest_used_port = port
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276 | a8083063 | Iustin Pop | |
277 | a8083063 | Iustin Pop | self._WriteConfig()
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278 | a8083063 | Iustin Pop | return port
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279 | a8083063 | Iustin Pop | |
280 | a8083063 | Iustin Pop | def GetHostKey(self): |
281 | a8083063 | Iustin Pop | """Return the rsa hostkey from the config.
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282 | a8083063 | Iustin Pop |
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283 | a8083063 | Iustin Pop | Args: None
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284 | a8083063 | Iustin Pop |
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285 | a8083063 | Iustin Pop | Returns: rsa hostkey
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286 | a8083063 | Iustin Pop | """
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287 | a8083063 | Iustin Pop | self._OpenConfig()
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288 | a8083063 | Iustin Pop | self._ReleaseLock()
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289 | a8083063 | Iustin Pop | return self._config_data.cluster.rsahostkeypub |
290 | a8083063 | Iustin Pop | |
291 | a8083063 | Iustin Pop | def AddInstance(self, instance): |
292 | a8083063 | Iustin Pop | """Add an instance to the config.
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293 | a8083063 | Iustin Pop |
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294 | a8083063 | Iustin Pop | This should be used after creating a new instance.
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295 | a8083063 | Iustin Pop |
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296 | a8083063 | Iustin Pop | Args:
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297 | a8083063 | Iustin Pop | instance: the instance object
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298 | a8083063 | Iustin Pop | """
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299 | a8083063 | Iustin Pop | if not isinstance(instance, objects.Instance): |
300 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid type passed to AddInstance") |
301 | a8083063 | Iustin Pop | |
302 | e00fb268 | Iustin Pop | if instance.disk_template != constants.DT_DISKLESS:
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303 | e00fb268 | Iustin Pop | all_lvs = instance.MapLVsByNode() |
304 | e00fb268 | Iustin Pop | logger.Info("Instance '%s' DISK_LAYOUT: %s" % (instance.name, all_lvs))
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305 | 923b1523 | Iustin Pop | |
306 | a8083063 | Iustin Pop | self._OpenConfig()
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307 | a8083063 | Iustin Pop | self._config_data.instances[instance.name] = instance
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308 | a8083063 | Iustin Pop | self._WriteConfig()
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309 | a8083063 | Iustin Pop | |
310 | a8083063 | Iustin Pop | def MarkInstanceUp(self, instance_name): |
311 | a8083063 | Iustin Pop | """Mark the instance status to up in the config.
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312 | a8083063 | Iustin Pop |
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313 | a8083063 | Iustin Pop | """
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314 | a8083063 | Iustin Pop | self._OpenConfig()
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315 | a8083063 | Iustin Pop | |
316 | a8083063 | Iustin Pop | if instance_name not in self._config_data.instances: |
317 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Unknown instance '%s'" % |
318 | 3ecf6786 | Iustin Pop | instance_name) |
319 | a8083063 | Iustin Pop | instance = self._config_data.instances[instance_name]
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320 | a8083063 | Iustin Pop | instance.status = "up"
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321 | a8083063 | Iustin Pop | self._WriteConfig()
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322 | a8083063 | Iustin Pop | |
323 | a8083063 | Iustin Pop | def RemoveInstance(self, instance_name): |
324 | a8083063 | Iustin Pop | """Remove the instance from the configuration.
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325 | a8083063 | Iustin Pop |
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326 | a8083063 | Iustin Pop | """
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327 | a8083063 | Iustin Pop | self._OpenConfig()
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328 | a8083063 | Iustin Pop | |
329 | a8083063 | Iustin Pop | if instance_name not in self._config_data.instances: |
330 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Unknown instance '%s'" % instance_name) |
331 | a8083063 | Iustin Pop | del self._config_data.instances[instance_name] |
332 | a8083063 | Iustin Pop | self._WriteConfig()
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333 | a8083063 | Iustin Pop | |
334 | fc95f88f | Iustin Pop | def RenameInstance(self, old_name, new_name): |
335 | fc95f88f | Iustin Pop | """Rename an instance.
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336 | fc95f88f | Iustin Pop |
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337 | fc95f88f | Iustin Pop | This needs to be done in ConfigWriter and not by RemoveInstance
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338 | fc95f88f | Iustin Pop | combined with AddInstance as only we can guarantee an atomic
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339 | fc95f88f | Iustin Pop | rename.
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340 | fc95f88f | Iustin Pop |
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341 | fc95f88f | Iustin Pop | """
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342 | fc95f88f | Iustin Pop | self._OpenConfig()
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343 | fc95f88f | Iustin Pop | if old_name not in self._config_data.instances: |
344 | fc95f88f | Iustin Pop | raise errors.ConfigurationError("Unknown instance '%s'" % old_name) |
345 | fc95f88f | Iustin Pop | inst = self._config_data.instances[old_name]
|
346 | fc95f88f | Iustin Pop | del self._config_data.instances[old_name] |
347 | fc95f88f | Iustin Pop | inst.name = new_name |
348 | fc95f88f | Iustin Pop | self._config_data.instances[inst.name] = inst
|
349 | fc95f88f | Iustin Pop | self._WriteConfig()
|
350 | fc95f88f | Iustin Pop | |
351 | a8083063 | Iustin Pop | def MarkInstanceDown(self, instance_name): |
352 | a8083063 | Iustin Pop | """Mark the status of an instance to down in the configuration.
|
353 | a8083063 | Iustin Pop |
|
354 | a8083063 | Iustin Pop | """
|
355 | a8083063 | Iustin Pop | self._OpenConfig()
|
356 | a8083063 | Iustin Pop | |
357 | a8083063 | Iustin Pop | if instance_name not in self._config_data.instances: |
358 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Unknown instance '%s'" % instance_name) |
359 | a8083063 | Iustin Pop | instance = self._config_data.instances[instance_name]
|
360 | a8083063 | Iustin Pop | instance.status = "down"
|
361 | a8083063 | Iustin Pop | self._WriteConfig()
|
362 | a8083063 | Iustin Pop | |
363 | a8083063 | Iustin Pop | def GetInstanceList(self): |
364 | a8083063 | Iustin Pop | """Get the list of instances.
|
365 | a8083063 | Iustin Pop |
|
366 | a8083063 | Iustin Pop | Returns:
|
367 | a8083063 | Iustin Pop | array of instances, ex. ['instance2.example.com','instance1.example.com']
|
368 | a8083063 | Iustin Pop | these contains all the instances, also the ones in Admin_down state
|
369 | a8083063 | Iustin Pop |
|
370 | a8083063 | Iustin Pop | """
|
371 | a8083063 | Iustin Pop | self._OpenConfig()
|
372 | a8083063 | Iustin Pop | self._ReleaseLock()
|
373 | a8083063 | Iustin Pop | |
374 | a8083063 | Iustin Pop | return self._config_data.instances.keys() |
375 | a8083063 | Iustin Pop | |
376 | a8083063 | Iustin Pop | def ExpandInstanceName(self, short_name): |
377 | a8083063 | Iustin Pop | """Attempt to expand an incomplete instance name.
|
378 | a8083063 | Iustin Pop |
|
379 | a8083063 | Iustin Pop | """
|
380 | a8083063 | Iustin Pop | self._OpenConfig()
|
381 | a8083063 | Iustin Pop | self._ReleaseLock()
|
382 | a8083063 | Iustin Pop | |
383 | a8083063 | Iustin Pop | return utils.MatchNameComponent(short_name,
|
384 | a8083063 | Iustin Pop | self._config_data.instances.keys())
|
385 | a8083063 | Iustin Pop | |
386 | a8083063 | Iustin Pop | def GetInstanceInfo(self, instance_name): |
387 | a8083063 | Iustin Pop | """Returns informations about an instance.
|
388 | a8083063 | Iustin Pop |
|
389 | a8083063 | Iustin Pop | It takes the information from the configuration file. Other informations of
|
390 | a8083063 | Iustin Pop | an instance are taken from the live systems.
|
391 | a8083063 | Iustin Pop |
|
392 | a8083063 | Iustin Pop | Args:
|
393 | a8083063 | Iustin Pop | instance: name of the instance, ex instance1.example.com
|
394 | a8083063 | Iustin Pop |
|
395 | a8083063 | Iustin Pop | Returns:
|
396 | a8083063 | Iustin Pop | the instance object
|
397 | a8083063 | Iustin Pop |
|
398 | a8083063 | Iustin Pop | """
|
399 | a8083063 | Iustin Pop | self._OpenConfig()
|
400 | a8083063 | Iustin Pop | self._ReleaseLock()
|
401 | a8083063 | Iustin Pop | |
402 | a8083063 | Iustin Pop | if instance_name not in self._config_data.instances: |
403 | a8083063 | Iustin Pop | return None |
404 | a8083063 | Iustin Pop | |
405 | a8083063 | Iustin Pop | return self._config_data.instances[instance_name] |
406 | a8083063 | Iustin Pop | |
407 | a8083063 | Iustin Pop | def AddNode(self, node): |
408 | a8083063 | Iustin Pop | """Add a node to the configuration.
|
409 | a8083063 | Iustin Pop |
|
410 | a8083063 | Iustin Pop | Args:
|
411 | a8083063 | Iustin Pop | node: an object.Node instance
|
412 | a8083063 | Iustin Pop |
|
413 | a8083063 | Iustin Pop | """
|
414 | a8083063 | Iustin Pop | self._OpenConfig()
|
415 | a8083063 | Iustin Pop | self._config_data.nodes[node.name] = node
|
416 | a8083063 | Iustin Pop | self._WriteConfig()
|
417 | a8083063 | Iustin Pop | |
418 | a8083063 | Iustin Pop | def RemoveNode(self, node_name): |
419 | a8083063 | Iustin Pop | """Remove a node from the configuration.
|
420 | a8083063 | Iustin Pop |
|
421 | a8083063 | Iustin Pop | """
|
422 | a8083063 | Iustin Pop | self._OpenConfig()
|
423 | a8083063 | Iustin Pop | if node_name not in self._config_data.nodes: |
424 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Unknown node '%s'" % node_name) |
425 | a8083063 | Iustin Pop | |
426 | a8083063 | Iustin Pop | del self._config_data.nodes[node_name] |
427 | a8083063 | Iustin Pop | self._WriteConfig()
|
428 | a8083063 | Iustin Pop | |
429 | a8083063 | Iustin Pop | def ExpandNodeName(self, short_name): |
430 | a8083063 | Iustin Pop | """Attempt to expand an incomplete instance name.
|
431 | a8083063 | Iustin Pop |
|
432 | a8083063 | Iustin Pop | """
|
433 | a8083063 | Iustin Pop | self._OpenConfig()
|
434 | a8083063 | Iustin Pop | self._ReleaseLock()
|
435 | a8083063 | Iustin Pop | |
436 | a8083063 | Iustin Pop | return utils.MatchNameComponent(short_name,
|
437 | a8083063 | Iustin Pop | self._config_data.nodes.keys())
|
438 | a8083063 | Iustin Pop | |
439 | a8083063 | Iustin Pop | def GetNodeInfo(self, node_name): |
440 | a8083063 | Iustin Pop | """Get the configuration of a node, as stored in the config.
|
441 | a8083063 | Iustin Pop |
|
442 | a8083063 | Iustin Pop | Args: node: nodename (tuple) of the node
|
443 | a8083063 | Iustin Pop |
|
444 | a8083063 | Iustin Pop | Returns: the node object
|
445 | a8083063 | Iustin Pop |
|
446 | a8083063 | Iustin Pop | """
|
447 | a8083063 | Iustin Pop | self._OpenConfig()
|
448 | a8083063 | Iustin Pop | self._ReleaseLock()
|
449 | a8083063 | Iustin Pop | |
450 | a8083063 | Iustin Pop | if node_name not in self._config_data.nodes: |
451 | a8083063 | Iustin Pop | return None |
452 | a8083063 | Iustin Pop | |
453 | a8083063 | Iustin Pop | return self._config_data.nodes[node_name] |
454 | a8083063 | Iustin Pop | |
455 | a8083063 | Iustin Pop | def GetNodeList(self): |
456 | a8083063 | Iustin Pop | """Return the list of nodes which are in the configuration.
|
457 | a8083063 | Iustin Pop |
|
458 | a8083063 | Iustin Pop | """
|
459 | a8083063 | Iustin Pop | self._OpenConfig()
|
460 | a8083063 | Iustin Pop | self._ReleaseLock()
|
461 | a8083063 | Iustin Pop | return self._config_data.nodes.keys() |
462 | a8083063 | Iustin Pop | |
463 | a8083063 | Iustin Pop | def DumpConfig(self): |
464 | a8083063 | Iustin Pop | """Return the entire configuration of the cluster.
|
465 | a8083063 | Iustin Pop | """
|
466 | a8083063 | Iustin Pop | self._OpenConfig()
|
467 | a8083063 | Iustin Pop | self._ReleaseLock()
|
468 | a8083063 | Iustin Pop | return self._config_data |
469 | a8083063 | Iustin Pop | |
470 | a8083063 | Iustin Pop | def _BumpSerialNo(self): |
471 | a8083063 | Iustin Pop | """Bump up the serial number of the config.
|
472 | a8083063 | Iustin Pop |
|
473 | a8083063 | Iustin Pop | """
|
474 | a8083063 | Iustin Pop | self._config_data.cluster.serial_no += 1 |
475 | a8083063 | Iustin Pop | |
476 | a8083063 | Iustin Pop | def _OpenConfig(self): |
477 | a8083063 | Iustin Pop | """Read the config data from disk.
|
478 | a8083063 | Iustin Pop |
|
479 | a8083063 | Iustin Pop | In case we already have configuration data and the config file has
|
480 | a8083063 | Iustin Pop | the same mtime as when we read it, we skip the parsing of the
|
481 | a8083063 | Iustin Pop | file, since de-serialisation could be slow.
|
482 | a8083063 | Iustin Pop |
|
483 | a8083063 | Iustin Pop | """
|
484 | a8083063 | Iustin Pop | try:
|
485 | a8083063 | Iustin Pop | st = os.stat(self._cfg_file)
|
486 | a8083063 | Iustin Pop | except OSError, err: |
487 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Can't stat config file: %s" % err) |
488 | a8083063 | Iustin Pop | if (self._config_data is not None and |
489 | a8083063 | Iustin Pop | self._config_time is not None and |
490 | 264bb3c5 | Michael Hanselmann | self._config_time == st.st_mtime and |
491 | 264bb3c5 | Michael Hanselmann | self._config_size == st.st_size and |
492 | 264bb3c5 | Michael Hanselmann | self._config_inode == st.st_ino):
|
493 | a8083063 | Iustin Pop | # data is current, so skip loading of config file
|
494 | a8083063 | Iustin Pop | return
|
495 | a8083063 | Iustin Pop | f = open(self._cfg_file, 'r') |
496 | a8083063 | Iustin Pop | try:
|
497 | a8083063 | Iustin Pop | try:
|
498 | 319856a9 | Michael Hanselmann | data = objects.ConfigData.Load(f) |
499 | a8083063 | Iustin Pop | except Exception, err: |
500 | 319856a9 | Michael Hanselmann | raise
|
501 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError(err)
|
502 | a8083063 | Iustin Pop | finally:
|
503 | a8083063 | Iustin Pop | f.close() |
504 | a8083063 | Iustin Pop | if (not hasattr(data, 'cluster') or |
505 | a8083063 | Iustin Pop | not hasattr(data.cluster, 'config_version')): |
506 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Incomplete configuration" |
507 | 3ecf6786 | Iustin Pop | " (missing cluster.config_version)")
|
508 | a8083063 | Iustin Pop | if data.cluster.config_version != constants.CONFIG_VERSION:
|
509 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Cluster configuration version" |
510 | 3ecf6786 | Iustin Pop | " mismatch, got %s instead of %s" %
|
511 | 3ecf6786 | Iustin Pop | (data.cluster.config_version, |
512 | 3ecf6786 | Iustin Pop | constants.CONFIG_VERSION)) |
513 | a8083063 | Iustin Pop | self._config_data = data
|
514 | a8083063 | Iustin Pop | self._config_time = st.st_mtime
|
515 | 264bb3c5 | Michael Hanselmann | self._config_size = st.st_size
|
516 | 264bb3c5 | Michael Hanselmann | self._config_inode = st.st_ino
|
517 | a8083063 | Iustin Pop | |
518 | a8083063 | Iustin Pop | def _ReleaseLock(self): |
519 | a8083063 | Iustin Pop | """xxxx
|
520 | a8083063 | Iustin Pop | """
|
521 | a8083063 | Iustin Pop | |
522 | a8083063 | Iustin Pop | def _DistributeConfig(self): |
523 | a8083063 | Iustin Pop | """Distribute the configuration to the other nodes.
|
524 | a8083063 | Iustin Pop |
|
525 | a8083063 | Iustin Pop | Currently, this only copies the configuration file. In the future,
|
526 | a8083063 | Iustin Pop | it could be used to encapsulate the 2/3-phase update mechanism.
|
527 | a8083063 | Iustin Pop |
|
528 | a8083063 | Iustin Pop | """
|
529 | a8083063 | Iustin Pop | if self._offline: |
530 | a8083063 | Iustin Pop | return True |
531 | a8083063 | Iustin Pop | bad = False
|
532 | a8083063 | Iustin Pop | nodelist = self.GetNodeList()
|
533 | 89e1fc26 | Iustin Pop | myhostname = self._my_hostname
|
534 | a8083063 | Iustin Pop | |
535 | a8083063 | Iustin Pop | tgt_list = [] |
536 | a8083063 | Iustin Pop | for node in nodelist: |
537 | a8083063 | Iustin Pop | nodeinfo = self.GetNodeInfo(node)
|
538 | a8083063 | Iustin Pop | if nodeinfo.name == myhostname:
|
539 | a8083063 | Iustin Pop | continue
|
540 | a8083063 | Iustin Pop | tgt_list.append(node) |
541 | a8083063 | Iustin Pop | |
542 | a8083063 | Iustin Pop | result = rpc.call_upload_file(tgt_list, self._cfg_file)
|
543 | a8083063 | Iustin Pop | for node in tgt_list: |
544 | a8083063 | Iustin Pop | if not result[node]: |
545 | a8083063 | Iustin Pop | logger.Error("copy of file %s to node %s failed" %
|
546 | a8083063 | Iustin Pop | (self._cfg_file, node))
|
547 | a8083063 | Iustin Pop | bad = True
|
548 | a8083063 | Iustin Pop | return not bad |
549 | a8083063 | Iustin Pop | |
550 | a8083063 | Iustin Pop | def _WriteConfig(self, destination=None): |
551 | a8083063 | Iustin Pop | """Write the configuration data to persistent storage.
|
552 | a8083063 | Iustin Pop |
|
553 | a8083063 | Iustin Pop | """
|
554 | a8083063 | Iustin Pop | if destination is None: |
555 | a8083063 | Iustin Pop | destination = self._cfg_file
|
556 | a8083063 | Iustin Pop | self._BumpSerialNo()
|
557 | a8083063 | Iustin Pop | dir_name, file_name = os.path.split(destination) |
558 | a8083063 | Iustin Pop | fd, name = tempfile.mkstemp('.newconfig', file_name, dir_name)
|
559 | a8083063 | Iustin Pop | f = os.fdopen(fd, 'w')
|
560 | a8083063 | Iustin Pop | try:
|
561 | a8083063 | Iustin Pop | self._config_data.Dump(f)
|
562 | a8083063 | Iustin Pop | os.fsync(f.fileno()) |
563 | a8083063 | Iustin Pop | finally:
|
564 | a8083063 | Iustin Pop | f.close() |
565 | a8083063 | Iustin Pop | # we don't need to do os.close(fd) as f.close() did it
|
566 | a8083063 | Iustin Pop | os.rename(name, destination) |
567 | fee9556c | Iustin Pop | # re-set our cache as not to re-read the config file
|
568 | fee9556c | Iustin Pop | try:
|
569 | fee9556c | Iustin Pop | st = os.stat(destination) |
570 | fee9556c | Iustin Pop | except OSError, err: |
571 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Can't stat config file: %s" % err) |
572 | fee9556c | Iustin Pop | self._config_time = st.st_mtime
|
573 | fee9556c | Iustin Pop | self._config_size = st.st_size
|
574 | fee9556c | Iustin Pop | self._config_inode = st.st_ino
|
575 | fee9556c | Iustin Pop | # and redistribute the config file
|
576 | a8083063 | Iustin Pop | self._DistributeConfig()
|
577 | a8083063 | Iustin Pop | |
578 | a8083063 | Iustin Pop | def InitConfig(self, node, primary_ip, secondary_ip, |
579 | 5fcdc80d | Iustin Pop | hostkeypub, mac_prefix, vg_name, def_bridge): |
580 | a8083063 | Iustin Pop | """Create the initial cluster configuration.
|
581 | a8083063 | Iustin Pop |
|
582 | a8083063 | Iustin Pop | It will contain the current node, which will also be the master
|
583 | a8083063 | Iustin Pop | node, and no instances or operating systmes.
|
584 | a8083063 | Iustin Pop |
|
585 | a8083063 | Iustin Pop | Args:
|
586 | a8083063 | Iustin Pop | node: the nodename of the initial node
|
587 | a8083063 | Iustin Pop | primary_ip: the IP address of the current host
|
588 | a8083063 | Iustin Pop | secondary_ip: the secondary IP of the current host or None
|
589 | a8083063 | Iustin Pop | hostkeypub: the public hostkey of this host
|
590 | a8083063 | Iustin Pop |
|
591 | 264bb3c5 | Michael Hanselmann | """
|
592 | a8083063 | Iustin Pop | hu_port = constants.FIRST_DRBD_PORT - 1
|
593 | a8083063 | Iustin Pop | globalconfig = objects.Cluster(config_version=constants.CONFIG_VERSION, |
594 | 330cda58 | Michael Hanselmann | serial_no=1,
|
595 | a8083063 | Iustin Pop | rsahostkeypub=hostkeypub, |
596 | a8083063 | Iustin Pop | highest_used_port=hu_port, |
597 | a8083063 | Iustin Pop | mac_prefix=mac_prefix, |
598 | a8083063 | Iustin Pop | volume_group_name=vg_name, |
599 | b2fddf63 | Iustin Pop | default_bridge=def_bridge, |
600 | b2fddf63 | Iustin Pop | tcpudp_port_pool=set())
|
601 | a8083063 | Iustin Pop | if secondary_ip is None: |
602 | a8083063 | Iustin Pop | secondary_ip = primary_ip |
603 | a8083063 | Iustin Pop | nodeconfig = objects.Node(name=node, primary_ip=primary_ip, |
604 | a8083063 | Iustin Pop | secondary_ip=secondary_ip) |
605 | a8083063 | Iustin Pop | |
606 | a8083063 | Iustin Pop | self._config_data = objects.ConfigData(nodes={node: nodeconfig},
|
607 | a8083063 | Iustin Pop | instances={}, |
608 | b2fddf63 | Iustin Pop | cluster=globalconfig) |
609 | a8083063 | Iustin Pop | self._WriteConfig()
|
610 | a8083063 | Iustin Pop | |
611 | a8083063 | Iustin Pop | def GetVGName(self): |
612 | a8083063 | Iustin Pop | """Return the volume group name.
|
613 | a8083063 | Iustin Pop |
|
614 | a8083063 | Iustin Pop | """
|
615 | a8083063 | Iustin Pop | self._OpenConfig()
|
616 | a8083063 | Iustin Pop | self._ReleaseLock()
|
617 | a8083063 | Iustin Pop | return self._config_data.cluster.volume_group_name |
618 | a8083063 | Iustin Pop | |
619 | a8083063 | Iustin Pop | def GetDefBridge(self): |
620 | a8083063 | Iustin Pop | """Return the default bridge.
|
621 | a8083063 | Iustin Pop |
|
622 | a8083063 | Iustin Pop | """
|
623 | a8083063 | Iustin Pop | self._OpenConfig()
|
624 | a8083063 | Iustin Pop | self._ReleaseLock()
|
625 | a8083063 | Iustin Pop | return self._config_data.cluster.default_bridge |
626 | a8083063 | Iustin Pop | |
627 | a8083063 | Iustin Pop | def GetMACPrefix(self): |
628 | a8083063 | Iustin Pop | """Return the mac prefix.
|
629 | a8083063 | Iustin Pop |
|
630 | a8083063 | Iustin Pop | """
|
631 | a8083063 | Iustin Pop | self._OpenConfig()
|
632 | a8083063 | Iustin Pop | self._ReleaseLock()
|
633 | a8083063 | Iustin Pop | return self._config_data.cluster.mac_prefix |
634 | 62779dd0 | Iustin Pop | |
635 | 62779dd0 | Iustin Pop | def GetClusterInfo(self): |
636 | 62779dd0 | Iustin Pop | """Returns informations about the cluster
|
637 | 62779dd0 | Iustin Pop |
|
638 | 62779dd0 | Iustin Pop | Returns:
|
639 | 62779dd0 | Iustin Pop | the cluster object
|
640 | 62779dd0 | Iustin Pop |
|
641 | 62779dd0 | Iustin Pop | """
|
642 | 62779dd0 | Iustin Pop | self._OpenConfig()
|
643 | 62779dd0 | Iustin Pop | self._ReleaseLock()
|
644 | 62779dd0 | Iustin Pop | |
645 | 62779dd0 | Iustin Pop | return self._config_data.cluster |
646 | e00fb268 | Iustin Pop | |
647 | e00fb268 | Iustin Pop | def Update(self, target): |
648 | e00fb268 | Iustin Pop | """Notify function to be called after updates.
|
649 | e00fb268 | Iustin Pop |
|
650 | e00fb268 | Iustin Pop | This function must be called when an object (as returned by
|
651 | e00fb268 | Iustin Pop | GetInstanceInfo, GetNodeInfo, GetCluster) has been updated and the
|
652 | e00fb268 | Iustin Pop | caller wants the modifications saved to the backing store. Note
|
653 | e00fb268 | Iustin Pop | that all modified objects will be saved, but the target argument
|
654 | e00fb268 | Iustin Pop | is the one the caller wants to ensure that it's saved.
|
655 | e00fb268 | Iustin Pop |
|
656 | e00fb268 | Iustin Pop | """
|
657 | e00fb268 | Iustin Pop | if self._config_data is None: |
658 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Configuration file not read," |
659 | 3ecf6786 | Iustin Pop | " cannot save.")
|
660 | e00fb268 | Iustin Pop | if isinstance(target, objects.Cluster): |
661 | e00fb268 | Iustin Pop | test = target == self._config_data.cluster
|
662 | e00fb268 | Iustin Pop | elif isinstance(target, objects.Node): |
663 | e00fb268 | Iustin Pop | test = target in self._config_data.nodes.values() |
664 | e00fb268 | Iustin Pop | elif isinstance(target, objects.Instance): |
665 | e00fb268 | Iustin Pop | test = target in self._config_data.instances.values() |
666 | e00fb268 | Iustin Pop | else:
|
667 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Invalid object type (%s) passed to" |
668 | 3ecf6786 | Iustin Pop | " ConfigWriter.Update" % type(target)) |
669 | e00fb268 | Iustin Pop | if not test: |
670 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Configuration updated since object" |
671 | 3ecf6786 | Iustin Pop | " has been read or unknown object")
|
672 | e00fb268 | Iustin Pop | self._WriteConfig() |