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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 | a8083063 | Iustin Pop | class ConfigWriter: |
47 | 098c0958 | Michael Hanselmann | """The interface to the cluster configuration.
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48 | a8083063 | Iustin Pop |
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49 | 098c0958 | Michael Hanselmann | """
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50 | a8083063 | Iustin Pop | def __init__(self, cfg_file=None, offline=False): |
51 | 14e15659 | Iustin Pop | self.write_count = 0 |
52 | a8083063 | Iustin Pop | self._config_data = None |
53 | a8083063 | Iustin Pop | self._config_time = None |
54 | 264bb3c5 | Michael Hanselmann | self._config_size = None |
55 | 264bb3c5 | Michael Hanselmann | self._config_inode = None |
56 | a8083063 | Iustin Pop | self._offline = offline
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57 | a8083063 | Iustin Pop | if cfg_file is None: |
58 | a8083063 | Iustin Pop | self._cfg_file = constants.CLUSTER_CONF_FILE
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59 | a8083063 | Iustin Pop | else:
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60 | a8083063 | Iustin Pop | self._cfg_file = cfg_file
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61 | 923b1523 | Iustin Pop | self._temporary_ids = set() |
62 | 89e1fc26 | Iustin Pop | # Note: in order to prevent errors when resolving our name in
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63 | 89e1fc26 | Iustin Pop | # _DistributeConfig, we compute it here once and reuse it; it's
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64 | 89e1fc26 | Iustin Pop | # better to raise an error before starting to modify the config
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65 | 89e1fc26 | Iustin Pop | # file than after it was modified
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66 | 89e1fc26 | Iustin Pop | self._my_hostname = utils.HostInfo().name
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67 | a8083063 | Iustin Pop | |
68 | a8083063 | Iustin Pop | # this method needs to be static, so that we can call it on the class
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69 | a8083063 | Iustin Pop | @staticmethod
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70 | a8083063 | Iustin Pop | def IsCluster(): |
71 | a8083063 | Iustin Pop | """Check if the cluster is configured.
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72 | a8083063 | Iustin Pop |
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73 | a8083063 | Iustin Pop | """
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74 | a8083063 | Iustin Pop | return os.path.exists(constants.CLUSTER_CONF_FILE)
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75 | a8083063 | Iustin Pop | |
76 | a8083063 | Iustin Pop | def GenerateMAC(self): |
77 | a8083063 | Iustin Pop | """Generate a MAC for an instance.
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78 | a8083063 | Iustin Pop |
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79 | a8083063 | Iustin Pop | This should check the current instances for duplicates.
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80 | a8083063 | Iustin Pop |
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81 | a8083063 | Iustin Pop | """
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82 | a8083063 | Iustin Pop | self._OpenConfig()
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83 | a8083063 | Iustin Pop | self._ReleaseLock()
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84 | a8083063 | Iustin Pop | prefix = self._config_data.cluster.mac_prefix
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85 | a8083063 | Iustin Pop | all_macs = self._AllMACs()
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86 | a8083063 | Iustin Pop | retries = 64
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87 | a8083063 | Iustin Pop | while retries > 0: |
88 | a8083063 | Iustin Pop | byte1 = random.randrange(0, 256) |
89 | a8083063 | Iustin Pop | byte2 = random.randrange(0, 256) |
90 | a8083063 | Iustin Pop | byte3 = random.randrange(0, 256) |
91 | a8083063 | Iustin Pop | mac = "%s:%02x:%02x:%02x" % (prefix, byte1, byte2, byte3)
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92 | a8083063 | Iustin Pop | if mac not in all_macs: |
93 | a8083063 | Iustin Pop | break
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94 | a8083063 | Iustin Pop | retries -= 1
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95 | a8083063 | Iustin Pop | else:
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96 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Can't generate unique MAC") |
97 | a8083063 | Iustin Pop | return mac
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98 | a8083063 | Iustin Pop | |
99 | 923b1523 | Iustin Pop | def _ComputeAllLVs(self): |
100 | 923b1523 | Iustin Pop | """Compute the list of all LVs.
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101 | 923b1523 | Iustin Pop |
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102 | 923b1523 | Iustin Pop | """
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103 | 923b1523 | Iustin Pop | self._OpenConfig()
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104 | 923b1523 | Iustin Pop | self._ReleaseLock()
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105 | 923b1523 | Iustin Pop | lvnames = set()
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106 | 923b1523 | Iustin Pop | for instance in self._config_data.instances.values(): |
107 | 923b1523 | Iustin Pop | node_data = instance.MapLVsByNode() |
108 | 923b1523 | Iustin Pop | for lv_list in node_data.values(): |
109 | 923b1523 | Iustin Pop | lvnames.update(lv_list) |
110 | 923b1523 | Iustin Pop | return lvnames
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111 | 923b1523 | Iustin Pop | |
112 | 923b1523 | Iustin Pop | def GenerateUniqueID(self, exceptions=None): |
113 | 923b1523 | Iustin Pop | """Generate an unique disk name.
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114 | 923b1523 | Iustin Pop |
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115 | 923b1523 | Iustin Pop | This checks the current node, instances and disk names for
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116 | 923b1523 | Iustin Pop | duplicates.
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117 | 923b1523 | Iustin Pop |
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118 | 923b1523 | Iustin Pop | Args:
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119 | 923b1523 | Iustin Pop | - exceptions: a list with some other names which should be checked
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120 | 923b1523 | Iustin Pop | for uniqueness (used for example when you want to get
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121 | 923b1523 | Iustin Pop | more than one id at one time without adding each one in
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122 | 923b1523 | Iustin Pop | turn to the config file
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123 | 923b1523 | Iustin Pop |
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124 | 923b1523 | Iustin Pop | Returns: the unique id as a string
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125 | 923b1523 | Iustin Pop |
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126 | 923b1523 | Iustin Pop | """
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127 | 923b1523 | Iustin Pop | existing = set()
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128 | 923b1523 | Iustin Pop | existing.update(self._temporary_ids)
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129 | 923b1523 | Iustin Pop | existing.update(self._ComputeAllLVs())
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130 | 923b1523 | Iustin Pop | existing.update(self._config_data.instances.keys())
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131 | 923b1523 | Iustin Pop | existing.update(self._config_data.nodes.keys())
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132 | 923b1523 | Iustin Pop | if exceptions is not None: |
133 | 923b1523 | Iustin Pop | existing.update(exceptions) |
134 | 923b1523 | Iustin Pop | retries = 64
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135 | 923b1523 | Iustin Pop | while retries > 0: |
136 | 24818e8f | Michael Hanselmann | unique_id = utils.NewUUID() |
137 | 923b1523 | Iustin Pop | if unique_id not in existing and unique_id is not None: |
138 | 923b1523 | Iustin Pop | break
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139 | 923b1523 | Iustin Pop | else:
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140 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Not able generate an unique ID" |
141 | 3ecf6786 | Iustin Pop | " (last tried ID: %s" % unique_id)
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142 | 923b1523 | Iustin Pop | self._temporary_ids.add(unique_id)
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143 | 923b1523 | Iustin Pop | return unique_id
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144 | 923b1523 | Iustin Pop | |
145 | a8083063 | Iustin Pop | def _AllMACs(self): |
146 | a8083063 | Iustin Pop | """Return all MACs present in the config.
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147 | a8083063 | Iustin Pop |
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148 | a8083063 | Iustin Pop | """
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149 | a8083063 | Iustin Pop | self._OpenConfig()
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150 | a8083063 | Iustin Pop | self._ReleaseLock()
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151 | a8083063 | Iustin Pop | |
152 | a8083063 | Iustin Pop | result = [] |
153 | a8083063 | Iustin Pop | for instance in self._config_data.instances.values(): |
154 | a8083063 | Iustin Pop | for nic in instance.nics: |
155 | a8083063 | Iustin Pop | result.append(nic.mac) |
156 | a8083063 | Iustin Pop | |
157 | a8083063 | Iustin Pop | return result
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158 | a8083063 | Iustin Pop | |
159 | a8083063 | Iustin Pop | def VerifyConfig(self): |
160 | a8083063 | Iustin Pop | """Stub verify function.
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161 | a8083063 | Iustin Pop | """
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162 | a8083063 | Iustin Pop | self._OpenConfig()
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163 | a8083063 | Iustin Pop | self._ReleaseLock()
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164 | a8083063 | Iustin Pop | |
165 | a8083063 | Iustin Pop | result = [] |
166 | a8083063 | Iustin Pop | seen_macs = [] |
167 | a8083063 | Iustin Pop | data = self._config_data
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168 | a8083063 | Iustin Pop | for instance_name in data.instances: |
169 | a8083063 | Iustin Pop | instance = data.instances[instance_name] |
170 | a8083063 | Iustin Pop | if instance.primary_node not in data.nodes: |
171 | a8083063 | Iustin Pop | result.append("Instance '%s' has invalid primary node '%s'" %
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172 | a8083063 | Iustin Pop | (instance_name, instance.primary_node)) |
173 | a8083063 | Iustin Pop | for snode in instance.secondary_nodes: |
174 | a8083063 | Iustin Pop | if snode not in data.nodes: |
175 | a8083063 | Iustin Pop | result.append("Instance '%s' has invalid secondary node '%s'" %
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176 | a8083063 | Iustin Pop | (instance_name, snode)) |
177 | a8083063 | Iustin Pop | for idx, nic in enumerate(instance.nics): |
178 | a8083063 | Iustin Pop | if nic.mac in seen_macs: |
179 | a8083063 | Iustin Pop | result.append("Instance '%s' has NIC %d mac %s duplicate" %
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180 | a8083063 | Iustin Pop | (instance_name, idx, nic.mac)) |
181 | a8083063 | Iustin Pop | else:
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182 | a8083063 | Iustin Pop | seen_macs.append(nic.mac) |
183 | a8083063 | Iustin Pop | return result
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184 | a8083063 | Iustin Pop | |
185 | a8083063 | Iustin Pop | def SetDiskID(self, disk, node_name): |
186 | a8083063 | Iustin Pop | """Convert the unique ID to the ID needed on the target nodes.
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187 | a8083063 | Iustin Pop |
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188 | a8083063 | Iustin Pop | This is used only for drbd, which needs ip/port configuration.
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189 | a8083063 | Iustin Pop |
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190 | a8083063 | Iustin Pop | The routine descends down and updates its children also, because
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191 | a8083063 | Iustin Pop | this helps when the only the top device is passed to the remote
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192 | a8083063 | Iustin Pop | node.
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193 | a8083063 | Iustin Pop |
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194 | a8083063 | Iustin Pop | """
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195 | a8083063 | Iustin Pop | if disk.children:
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196 | a8083063 | Iustin Pop | for child in disk.children: |
197 | a8083063 | Iustin Pop | self.SetDiskID(child, node_name)
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198 | a8083063 | Iustin Pop | |
199 | a8083063 | Iustin Pop | if disk.logical_id is None and disk.physical_id is not None: |
200 | a8083063 | Iustin Pop | return
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201 | a1f445d3 | Iustin Pop | if disk.dev_type in constants.LDS_DRBD: |
202 | a8083063 | Iustin Pop | pnode, snode, port = disk.logical_id |
203 | a8083063 | Iustin Pop | if node_name not in (pnode, snode): |
204 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("DRBD device not knowing node %s" % |
205 | 3ecf6786 | Iustin Pop | node_name) |
206 | a8083063 | Iustin Pop | pnode_info = self.GetNodeInfo(pnode)
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207 | a8083063 | Iustin Pop | snode_info = self.GetNodeInfo(snode)
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208 | a8083063 | Iustin Pop | if pnode_info is None or snode_info is None: |
209 | a8083063 | Iustin Pop | raise errors.ConfigurationError("Can't find primary or secondary node" |
210 | a8083063 | Iustin Pop | " for %s" % str(disk)) |
211 | a8083063 | Iustin Pop | if pnode == node_name:
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212 | a8083063 | Iustin Pop | disk.physical_id = (pnode_info.secondary_ip, port, |
213 | a8083063 | Iustin Pop | snode_info.secondary_ip, port) |
214 | a8083063 | Iustin Pop | else: # it must be secondary, we tested above |
215 | a8083063 | Iustin Pop | disk.physical_id = (snode_info.secondary_ip, port, |
216 | a8083063 | Iustin Pop | pnode_info.secondary_ip, port) |
217 | a8083063 | Iustin Pop | else:
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218 | a8083063 | Iustin Pop | disk.physical_id = disk.logical_id |
219 | a8083063 | Iustin Pop | return
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220 | a8083063 | Iustin Pop | |
221 | b2fddf63 | Iustin Pop | def AddTcpUdpPort(self, port): |
222 | b2fddf63 | Iustin Pop | """Adds a new port to the available port pool.
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223 | b2fddf63 | Iustin Pop |
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224 | b2fddf63 | Iustin Pop | """
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225 | 264bb3c5 | Michael Hanselmann | if not isinstance(port, int): |
226 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Invalid type passed for port") |
227 | 264bb3c5 | Michael Hanselmann | |
228 | 264bb3c5 | Michael Hanselmann | self._OpenConfig()
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229 | b2fddf63 | Iustin Pop | self._config_data.cluster.tcpudp_port_pool.add(port)
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230 | 264bb3c5 | Michael Hanselmann | self._WriteConfig()
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231 | 264bb3c5 | Michael Hanselmann | |
232 | b2fddf63 | Iustin Pop | def GetPortList(self): |
233 | 264bb3c5 | Michael Hanselmann | """Returns a copy of the current port list.
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234 | 264bb3c5 | Michael Hanselmann |
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235 | 264bb3c5 | Michael Hanselmann | """
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236 | 264bb3c5 | Michael Hanselmann | self._OpenConfig()
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237 | 264bb3c5 | Michael Hanselmann | self._ReleaseLock()
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238 | b2fddf63 | Iustin Pop | return self._config_data.cluster.tcpudp_port_pool.copy() |
239 | 264bb3c5 | Michael Hanselmann | |
240 | a8083063 | Iustin Pop | def AllocatePort(self): |
241 | a8083063 | Iustin Pop | """Allocate a port.
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242 | a8083063 | Iustin Pop |
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243 | b2fddf63 | Iustin Pop | The port will be taken from the available port pool or from the
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244 | b2fddf63 | Iustin Pop | default port range (and in this case we increase
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245 | b2fddf63 | Iustin Pop | highest_used_port).
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246 | a8083063 | Iustin Pop |
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247 | a8083063 | Iustin Pop | """
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248 | a8083063 | Iustin Pop | self._OpenConfig()
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249 | a8083063 | Iustin Pop | |
250 | 264bb3c5 | Michael Hanselmann | # If there are TCP/IP ports configured, we use them first.
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251 | b2fddf63 | Iustin Pop | if self._config_data.cluster.tcpudp_port_pool: |
252 | b2fddf63 | Iustin Pop | port = self._config_data.cluster.tcpudp_port_pool.pop()
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253 | 264bb3c5 | Michael Hanselmann | else:
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254 | 264bb3c5 | Michael Hanselmann | port = self._config_data.cluster.highest_used_port + 1 |
255 | 264bb3c5 | Michael Hanselmann | if port >= constants.LAST_DRBD_PORT:
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256 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("The highest used port is greater" |
257 | 3ecf6786 | Iustin Pop | " than %s. Aborting." %
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258 | 3ecf6786 | Iustin Pop | constants.LAST_DRBD_PORT) |
259 | 264bb3c5 | Michael Hanselmann | self._config_data.cluster.highest_used_port = port
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260 | a8083063 | Iustin Pop | |
261 | a8083063 | Iustin Pop | self._WriteConfig()
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262 | a8083063 | Iustin Pop | return port
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263 | a8083063 | Iustin Pop | |
264 | a8083063 | Iustin Pop | def GetHostKey(self): |
265 | a8083063 | Iustin Pop | """Return the rsa hostkey from the config.
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266 | a8083063 | Iustin Pop |
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267 | a8083063 | Iustin Pop | Args: None
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268 | a8083063 | Iustin Pop |
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269 | a8083063 | Iustin Pop | Returns: rsa hostkey
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270 | a8083063 | Iustin Pop | """
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271 | a8083063 | Iustin Pop | self._OpenConfig()
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272 | a8083063 | Iustin Pop | self._ReleaseLock()
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273 | a8083063 | Iustin Pop | return self._config_data.cluster.rsahostkeypub |
274 | a8083063 | Iustin Pop | |
275 | a8083063 | Iustin Pop | def AddInstance(self, instance): |
276 | a8083063 | Iustin Pop | """Add an instance to the config.
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277 | a8083063 | Iustin Pop |
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278 | a8083063 | Iustin Pop | This should be used after creating a new instance.
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279 | a8083063 | Iustin Pop |
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280 | a8083063 | Iustin Pop | Args:
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281 | a8083063 | Iustin Pop | instance: the instance object
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282 | a8083063 | Iustin Pop | """
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283 | a8083063 | Iustin Pop | if not isinstance(instance, objects.Instance): |
284 | a8083063 | Iustin Pop | raise errors.ProgrammerError("Invalid type passed to AddInstance") |
285 | a8083063 | Iustin Pop | |
286 | e00fb268 | Iustin Pop | if instance.disk_template != constants.DT_DISKLESS:
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287 | e00fb268 | Iustin Pop | all_lvs = instance.MapLVsByNode() |
288 | e00fb268 | Iustin Pop | logger.Info("Instance '%s' DISK_LAYOUT: %s" % (instance.name, all_lvs))
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289 | 923b1523 | Iustin Pop | |
290 | a8083063 | Iustin Pop | self._OpenConfig()
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291 | a8083063 | Iustin Pop | self._config_data.instances[instance.name] = instance
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292 | a8083063 | Iustin Pop | self._WriteConfig()
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293 | a8083063 | Iustin Pop | |
294 | a8083063 | Iustin Pop | def MarkInstanceUp(self, instance_name): |
295 | a8083063 | Iustin Pop | """Mark the instance status to up in the config.
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296 | a8083063 | Iustin Pop |
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297 | a8083063 | Iustin Pop | """
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298 | a8083063 | Iustin Pop | self._OpenConfig()
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299 | a8083063 | Iustin Pop | |
300 | a8083063 | Iustin Pop | if instance_name not in self._config_data.instances: |
301 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Unknown instance '%s'" % |
302 | 3ecf6786 | Iustin Pop | instance_name) |
303 | a8083063 | Iustin Pop | instance = self._config_data.instances[instance_name]
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304 | a8083063 | Iustin Pop | instance.status = "up"
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305 | a8083063 | Iustin Pop | self._WriteConfig()
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306 | a8083063 | Iustin Pop | |
307 | a8083063 | Iustin Pop | def RemoveInstance(self, instance_name): |
308 | a8083063 | Iustin Pop | """Remove the instance from the configuration.
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309 | a8083063 | Iustin Pop |
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310 | a8083063 | Iustin Pop | """
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311 | a8083063 | Iustin Pop | self._OpenConfig()
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312 | a8083063 | Iustin Pop | |
313 | a8083063 | Iustin Pop | if instance_name not in self._config_data.instances: |
314 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Unknown instance '%s'" % instance_name) |
315 | a8083063 | Iustin Pop | del self._config_data.instances[instance_name] |
316 | a8083063 | Iustin Pop | self._WriteConfig()
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317 | a8083063 | Iustin Pop | |
318 | fc95f88f | Iustin Pop | def RenameInstance(self, old_name, new_name): |
319 | fc95f88f | Iustin Pop | """Rename an instance.
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320 | fc95f88f | Iustin Pop |
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321 | fc95f88f | Iustin Pop | This needs to be done in ConfigWriter and not by RemoveInstance
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322 | fc95f88f | Iustin Pop | combined with AddInstance as only we can guarantee an atomic
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323 | fc95f88f | Iustin Pop | rename.
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324 | fc95f88f | Iustin Pop |
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325 | fc95f88f | Iustin Pop | """
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326 | fc95f88f | Iustin Pop | self._OpenConfig()
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327 | fc95f88f | Iustin Pop | if old_name not in self._config_data.instances: |
328 | fc95f88f | Iustin Pop | raise errors.ConfigurationError("Unknown instance '%s'" % old_name) |
329 | fc95f88f | Iustin Pop | inst = self._config_data.instances[old_name]
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330 | fc95f88f | Iustin Pop | del self._config_data.instances[old_name] |
331 | fc95f88f | Iustin Pop | inst.name = new_name |
332 | fc95f88f | Iustin Pop | self._config_data.instances[inst.name] = inst
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333 | fc95f88f | Iustin Pop | self._WriteConfig()
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334 | fc95f88f | Iustin Pop | |
335 | a8083063 | Iustin Pop | def MarkInstanceDown(self, instance_name): |
336 | a8083063 | Iustin Pop | """Mark the status of an instance to down in the configuration.
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337 | a8083063 | Iustin Pop |
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338 | a8083063 | Iustin Pop | """
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339 | a8083063 | Iustin Pop | self._OpenConfig()
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340 | a8083063 | Iustin Pop | |
341 | a8083063 | Iustin Pop | if instance_name not in self._config_data.instances: |
342 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Unknown instance '%s'" % instance_name) |
343 | a8083063 | Iustin Pop | instance = self._config_data.instances[instance_name]
|
344 | a8083063 | Iustin Pop | instance.status = "down"
|
345 | a8083063 | Iustin Pop | self._WriteConfig()
|
346 | a8083063 | Iustin Pop | |
347 | a8083063 | Iustin Pop | def GetInstanceList(self): |
348 | a8083063 | Iustin Pop | """Get the list of instances.
|
349 | a8083063 | Iustin Pop |
|
350 | a8083063 | Iustin Pop | Returns:
|
351 | a8083063 | Iustin Pop | array of instances, ex. ['instance2.example.com','instance1.example.com']
|
352 | a8083063 | Iustin Pop | these contains all the instances, also the ones in Admin_down state
|
353 | a8083063 | Iustin Pop |
|
354 | a8083063 | Iustin Pop | """
|
355 | a8083063 | Iustin Pop | self._OpenConfig()
|
356 | a8083063 | Iustin Pop | self._ReleaseLock()
|
357 | a8083063 | Iustin Pop | |
358 | a8083063 | Iustin Pop | return self._config_data.instances.keys() |
359 | a8083063 | Iustin Pop | |
360 | a8083063 | Iustin Pop | def ExpandInstanceName(self, short_name): |
361 | a8083063 | Iustin Pop | """Attempt to expand an incomplete instance name.
|
362 | a8083063 | Iustin Pop |
|
363 | a8083063 | Iustin Pop | """
|
364 | a8083063 | Iustin Pop | self._OpenConfig()
|
365 | a8083063 | Iustin Pop | self._ReleaseLock()
|
366 | a8083063 | Iustin Pop | |
367 | a8083063 | Iustin Pop | return utils.MatchNameComponent(short_name,
|
368 | a8083063 | Iustin Pop | self._config_data.instances.keys())
|
369 | a8083063 | Iustin Pop | |
370 | a8083063 | Iustin Pop | def GetInstanceInfo(self, instance_name): |
371 | a8083063 | Iustin Pop | """Returns informations about an instance.
|
372 | a8083063 | Iustin Pop |
|
373 | a8083063 | Iustin Pop | It takes the information from the configuration file. Other informations of
|
374 | a8083063 | Iustin Pop | an instance are taken from the live systems.
|
375 | a8083063 | Iustin Pop |
|
376 | a8083063 | Iustin Pop | Args:
|
377 | a8083063 | Iustin Pop | instance: name of the instance, ex instance1.example.com
|
378 | a8083063 | Iustin Pop |
|
379 | a8083063 | Iustin Pop | Returns:
|
380 | a8083063 | Iustin Pop | the instance object
|
381 | a8083063 | Iustin Pop |
|
382 | a8083063 | Iustin Pop | """
|
383 | a8083063 | Iustin Pop | self._OpenConfig()
|
384 | a8083063 | Iustin Pop | self._ReleaseLock()
|
385 | a8083063 | Iustin Pop | |
386 | a8083063 | Iustin Pop | if instance_name not in self._config_data.instances: |
387 | a8083063 | Iustin Pop | return None |
388 | a8083063 | Iustin Pop | |
389 | a8083063 | Iustin Pop | return self._config_data.instances[instance_name] |
390 | a8083063 | Iustin Pop | |
391 | a8083063 | Iustin Pop | def AddNode(self, node): |
392 | a8083063 | Iustin Pop | """Add a node to the configuration.
|
393 | a8083063 | Iustin Pop |
|
394 | a8083063 | Iustin Pop | Args:
|
395 | a8083063 | Iustin Pop | node: an object.Node instance
|
396 | a8083063 | Iustin Pop |
|
397 | a8083063 | Iustin Pop | """
|
398 | a8083063 | Iustin Pop | self._OpenConfig()
|
399 | a8083063 | Iustin Pop | self._config_data.nodes[node.name] = node
|
400 | a8083063 | Iustin Pop | self._WriteConfig()
|
401 | a8083063 | Iustin Pop | |
402 | a8083063 | Iustin Pop | def RemoveNode(self, node_name): |
403 | a8083063 | Iustin Pop | """Remove a node from the configuration.
|
404 | a8083063 | Iustin Pop |
|
405 | a8083063 | Iustin Pop | """
|
406 | a8083063 | Iustin Pop | self._OpenConfig()
|
407 | a8083063 | Iustin Pop | if node_name not in self._config_data.nodes: |
408 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Unknown node '%s'" % node_name) |
409 | a8083063 | Iustin Pop | |
410 | a8083063 | Iustin Pop | del self._config_data.nodes[node_name] |
411 | a8083063 | Iustin Pop | self._WriteConfig()
|
412 | a8083063 | Iustin Pop | |
413 | a8083063 | Iustin Pop | def ExpandNodeName(self, short_name): |
414 | a8083063 | Iustin Pop | """Attempt to expand an incomplete instance name.
|
415 | a8083063 | Iustin Pop |
|
416 | a8083063 | Iustin Pop | """
|
417 | a8083063 | Iustin Pop | self._OpenConfig()
|
418 | a8083063 | Iustin Pop | self._ReleaseLock()
|
419 | a8083063 | Iustin Pop | |
420 | a8083063 | Iustin Pop | return utils.MatchNameComponent(short_name,
|
421 | a8083063 | Iustin Pop | self._config_data.nodes.keys())
|
422 | a8083063 | Iustin Pop | |
423 | a8083063 | Iustin Pop | def GetNodeInfo(self, node_name): |
424 | a8083063 | Iustin Pop | """Get the configuration of a node, as stored in the config.
|
425 | a8083063 | Iustin Pop |
|
426 | a8083063 | Iustin Pop | Args: node: nodename (tuple) of the node
|
427 | a8083063 | Iustin Pop |
|
428 | a8083063 | Iustin Pop | Returns: the node object
|
429 | a8083063 | Iustin Pop |
|
430 | a8083063 | Iustin Pop | """
|
431 | a8083063 | Iustin Pop | self._OpenConfig()
|
432 | a8083063 | Iustin Pop | self._ReleaseLock()
|
433 | a8083063 | Iustin Pop | |
434 | a8083063 | Iustin Pop | if node_name not in self._config_data.nodes: |
435 | a8083063 | Iustin Pop | return None |
436 | a8083063 | Iustin Pop | |
437 | a8083063 | Iustin Pop | return self._config_data.nodes[node_name] |
438 | a8083063 | Iustin Pop | |
439 | a8083063 | Iustin Pop | def GetNodeList(self): |
440 | a8083063 | Iustin Pop | """Return the list of nodes which are in the configuration.
|
441 | a8083063 | Iustin Pop |
|
442 | a8083063 | Iustin Pop | """
|
443 | a8083063 | Iustin Pop | self._OpenConfig()
|
444 | a8083063 | Iustin Pop | self._ReleaseLock()
|
445 | a8083063 | Iustin Pop | return self._config_data.nodes.keys() |
446 | a8083063 | Iustin Pop | |
447 | a8083063 | Iustin Pop | def DumpConfig(self): |
448 | a8083063 | Iustin Pop | """Return the entire configuration of the cluster.
|
449 | a8083063 | Iustin Pop | """
|
450 | a8083063 | Iustin Pop | self._OpenConfig()
|
451 | a8083063 | Iustin Pop | self._ReleaseLock()
|
452 | a8083063 | Iustin Pop | return self._config_data |
453 | a8083063 | Iustin Pop | |
454 | a8083063 | Iustin Pop | def _BumpSerialNo(self): |
455 | a8083063 | Iustin Pop | """Bump up the serial number of the config.
|
456 | a8083063 | Iustin Pop |
|
457 | a8083063 | Iustin Pop | """
|
458 | a8083063 | Iustin Pop | self._config_data.cluster.serial_no += 1 |
459 | a8083063 | Iustin Pop | |
460 | a8083063 | Iustin Pop | def _OpenConfig(self): |
461 | a8083063 | Iustin Pop | """Read the config data from disk.
|
462 | a8083063 | Iustin Pop |
|
463 | a8083063 | Iustin Pop | In case we already have configuration data and the config file has
|
464 | a8083063 | Iustin Pop | the same mtime as when we read it, we skip the parsing of the
|
465 | a8083063 | Iustin Pop | file, since de-serialisation could be slow.
|
466 | a8083063 | Iustin Pop |
|
467 | a8083063 | Iustin Pop | """
|
468 | a8083063 | Iustin Pop | try:
|
469 | a8083063 | Iustin Pop | st = os.stat(self._cfg_file)
|
470 | a8083063 | Iustin Pop | except OSError, err: |
471 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Can't stat config file: %s" % err) |
472 | a8083063 | Iustin Pop | if (self._config_data is not None and |
473 | a8083063 | Iustin Pop | self._config_time is not None and |
474 | 264bb3c5 | Michael Hanselmann | self._config_time == st.st_mtime and |
475 | 264bb3c5 | Michael Hanselmann | self._config_size == st.st_size and |
476 | 264bb3c5 | Michael Hanselmann | self._config_inode == st.st_ino):
|
477 | a8083063 | Iustin Pop | # data is current, so skip loading of config file
|
478 | a8083063 | Iustin Pop | return
|
479 | a8083063 | Iustin Pop | f = open(self._cfg_file, 'r') |
480 | a8083063 | Iustin Pop | try:
|
481 | a8083063 | Iustin Pop | try:
|
482 | 319856a9 | Michael Hanselmann | data = objects.ConfigData.Load(f) |
483 | a8083063 | Iustin Pop | except Exception, err: |
484 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError(err)
|
485 | a8083063 | Iustin Pop | finally:
|
486 | a8083063 | Iustin Pop | f.close() |
487 | a8083063 | Iustin Pop | if (not hasattr(data, 'cluster') or |
488 | a8083063 | Iustin Pop | not hasattr(data.cluster, 'config_version')): |
489 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Incomplete configuration" |
490 | 3ecf6786 | Iustin Pop | " (missing cluster.config_version)")
|
491 | a8083063 | Iustin Pop | if data.cluster.config_version != constants.CONFIG_VERSION:
|
492 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Cluster configuration version" |
493 | 3ecf6786 | Iustin Pop | " mismatch, got %s instead of %s" %
|
494 | 3ecf6786 | Iustin Pop | (data.cluster.config_version, |
495 | 3ecf6786 | Iustin Pop | constants.CONFIG_VERSION)) |
496 | a8083063 | Iustin Pop | self._config_data = data
|
497 | a8083063 | Iustin Pop | self._config_time = st.st_mtime
|
498 | 264bb3c5 | Michael Hanselmann | self._config_size = st.st_size
|
499 | 264bb3c5 | Michael Hanselmann | self._config_inode = st.st_ino
|
500 | a8083063 | Iustin Pop | |
501 | a8083063 | Iustin Pop | def _ReleaseLock(self): |
502 | a8083063 | Iustin Pop | """xxxx
|
503 | a8083063 | Iustin Pop | """
|
504 | a8083063 | Iustin Pop | |
505 | a8083063 | Iustin Pop | def _DistributeConfig(self): |
506 | a8083063 | Iustin Pop | """Distribute the configuration to the other nodes.
|
507 | a8083063 | Iustin Pop |
|
508 | a8083063 | Iustin Pop | Currently, this only copies the configuration file. In the future,
|
509 | a8083063 | Iustin Pop | it could be used to encapsulate the 2/3-phase update mechanism.
|
510 | a8083063 | Iustin Pop |
|
511 | a8083063 | Iustin Pop | """
|
512 | a8083063 | Iustin Pop | if self._offline: |
513 | a8083063 | Iustin Pop | return True |
514 | a8083063 | Iustin Pop | bad = False
|
515 | a8083063 | Iustin Pop | nodelist = self.GetNodeList()
|
516 | 89e1fc26 | Iustin Pop | myhostname = self._my_hostname
|
517 | a8083063 | Iustin Pop | |
518 | a8083063 | Iustin Pop | tgt_list = [] |
519 | a8083063 | Iustin Pop | for node in nodelist: |
520 | a8083063 | Iustin Pop | nodeinfo = self.GetNodeInfo(node)
|
521 | a8083063 | Iustin Pop | if nodeinfo.name == myhostname:
|
522 | a8083063 | Iustin Pop | continue
|
523 | a8083063 | Iustin Pop | tgt_list.append(node) |
524 | a8083063 | Iustin Pop | |
525 | a8083063 | Iustin Pop | result = rpc.call_upload_file(tgt_list, self._cfg_file)
|
526 | a8083063 | Iustin Pop | for node in tgt_list: |
527 | a8083063 | Iustin Pop | if not result[node]: |
528 | a8083063 | Iustin Pop | logger.Error("copy of file %s to node %s failed" %
|
529 | a8083063 | Iustin Pop | (self._cfg_file, node))
|
530 | a8083063 | Iustin Pop | bad = True
|
531 | a8083063 | Iustin Pop | return not bad |
532 | a8083063 | Iustin Pop | |
533 | a8083063 | Iustin Pop | def _WriteConfig(self, destination=None): |
534 | a8083063 | Iustin Pop | """Write the configuration data to persistent storage.
|
535 | a8083063 | Iustin Pop |
|
536 | a8083063 | Iustin Pop | """
|
537 | a8083063 | Iustin Pop | if destination is None: |
538 | a8083063 | Iustin Pop | destination = self._cfg_file
|
539 | a8083063 | Iustin Pop | self._BumpSerialNo()
|
540 | a8083063 | Iustin Pop | dir_name, file_name = os.path.split(destination) |
541 | a8083063 | Iustin Pop | fd, name = tempfile.mkstemp('.newconfig', file_name, dir_name)
|
542 | a8083063 | Iustin Pop | f = os.fdopen(fd, 'w')
|
543 | a8083063 | Iustin Pop | try:
|
544 | a8083063 | Iustin Pop | self._config_data.Dump(f)
|
545 | a8083063 | Iustin Pop | os.fsync(f.fileno()) |
546 | a8083063 | Iustin Pop | finally:
|
547 | a8083063 | Iustin Pop | f.close() |
548 | a8083063 | Iustin Pop | # we don't need to do os.close(fd) as f.close() did it
|
549 | a8083063 | Iustin Pop | os.rename(name, destination) |
550 | 14e15659 | Iustin Pop | self.write_count += 1 |
551 | fee9556c | Iustin Pop | # re-set our cache as not to re-read the config file
|
552 | fee9556c | Iustin Pop | try:
|
553 | fee9556c | Iustin Pop | st = os.stat(destination) |
554 | fee9556c | Iustin Pop | except OSError, err: |
555 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Can't stat config file: %s" % err) |
556 | fee9556c | Iustin Pop | self._config_time = st.st_mtime
|
557 | fee9556c | Iustin Pop | self._config_size = st.st_size
|
558 | fee9556c | Iustin Pop | self._config_inode = st.st_ino
|
559 | fee9556c | Iustin Pop | # and redistribute the config file
|
560 | a8083063 | Iustin Pop | self._DistributeConfig()
|
561 | a8083063 | Iustin Pop | |
562 | a8083063 | Iustin Pop | def InitConfig(self, node, primary_ip, secondary_ip, |
563 | 5fcdc80d | Iustin Pop | hostkeypub, mac_prefix, vg_name, def_bridge): |
564 | a8083063 | Iustin Pop | """Create the initial cluster configuration.
|
565 | a8083063 | Iustin Pop |
|
566 | a8083063 | Iustin Pop | It will contain the current node, which will also be the master
|
567 | a8083063 | Iustin Pop | node, and no instances or operating systmes.
|
568 | a8083063 | Iustin Pop |
|
569 | a8083063 | Iustin Pop | Args:
|
570 | a8083063 | Iustin Pop | node: the nodename of the initial node
|
571 | a8083063 | Iustin Pop | primary_ip: the IP address of the current host
|
572 | a8083063 | Iustin Pop | secondary_ip: the secondary IP of the current host or None
|
573 | a8083063 | Iustin Pop | hostkeypub: the public hostkey of this host
|
574 | a8083063 | Iustin Pop |
|
575 | 264bb3c5 | Michael Hanselmann | """
|
576 | a8083063 | Iustin Pop | hu_port = constants.FIRST_DRBD_PORT - 1
|
577 | a8083063 | Iustin Pop | globalconfig = objects.Cluster(config_version=constants.CONFIG_VERSION, |
578 | 330cda58 | Michael Hanselmann | serial_no=1,
|
579 | a8083063 | Iustin Pop | rsahostkeypub=hostkeypub, |
580 | a8083063 | Iustin Pop | highest_used_port=hu_port, |
581 | a8083063 | Iustin Pop | mac_prefix=mac_prefix, |
582 | a8083063 | Iustin Pop | volume_group_name=vg_name, |
583 | b2fddf63 | Iustin Pop | default_bridge=def_bridge, |
584 | b2fddf63 | Iustin Pop | tcpudp_port_pool=set())
|
585 | a8083063 | Iustin Pop | if secondary_ip is None: |
586 | a8083063 | Iustin Pop | secondary_ip = primary_ip |
587 | a8083063 | Iustin Pop | nodeconfig = objects.Node(name=node, primary_ip=primary_ip, |
588 | a8083063 | Iustin Pop | secondary_ip=secondary_ip) |
589 | a8083063 | Iustin Pop | |
590 | a8083063 | Iustin Pop | self._config_data = objects.ConfigData(nodes={node: nodeconfig},
|
591 | a8083063 | Iustin Pop | instances={}, |
592 | b2fddf63 | Iustin Pop | cluster=globalconfig) |
593 | a8083063 | Iustin Pop | self._WriteConfig()
|
594 | a8083063 | Iustin Pop | |
595 | a8083063 | Iustin Pop | def GetVGName(self): |
596 | a8083063 | Iustin Pop | """Return the volume group name.
|
597 | a8083063 | Iustin Pop |
|
598 | a8083063 | Iustin Pop | """
|
599 | a8083063 | Iustin Pop | self._OpenConfig()
|
600 | a8083063 | Iustin Pop | self._ReleaseLock()
|
601 | a8083063 | Iustin Pop | return self._config_data.cluster.volume_group_name |
602 | a8083063 | Iustin Pop | |
603 | a8083063 | Iustin Pop | def GetDefBridge(self): |
604 | a8083063 | Iustin Pop | """Return the default bridge.
|
605 | a8083063 | Iustin Pop |
|
606 | a8083063 | Iustin Pop | """
|
607 | a8083063 | Iustin Pop | self._OpenConfig()
|
608 | a8083063 | Iustin Pop | self._ReleaseLock()
|
609 | a8083063 | Iustin Pop | return self._config_data.cluster.default_bridge |
610 | a8083063 | Iustin Pop | |
611 | a8083063 | Iustin Pop | def GetMACPrefix(self): |
612 | a8083063 | Iustin Pop | """Return the mac prefix.
|
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.mac_prefix |
618 | 62779dd0 | Iustin Pop | |
619 | 62779dd0 | Iustin Pop | def GetClusterInfo(self): |
620 | 62779dd0 | Iustin Pop | """Returns informations about the cluster
|
621 | 62779dd0 | Iustin Pop |
|
622 | 62779dd0 | Iustin Pop | Returns:
|
623 | 62779dd0 | Iustin Pop | the cluster object
|
624 | 62779dd0 | Iustin Pop |
|
625 | 62779dd0 | Iustin Pop | """
|
626 | 62779dd0 | Iustin Pop | self._OpenConfig()
|
627 | 62779dd0 | Iustin Pop | self._ReleaseLock()
|
628 | 62779dd0 | Iustin Pop | |
629 | 62779dd0 | Iustin Pop | return self._config_data.cluster |
630 | e00fb268 | Iustin Pop | |
631 | e00fb268 | Iustin Pop | def Update(self, target): |
632 | e00fb268 | Iustin Pop | """Notify function to be called after updates.
|
633 | e00fb268 | Iustin Pop |
|
634 | e00fb268 | Iustin Pop | This function must be called when an object (as returned by
|
635 | e00fb268 | Iustin Pop | GetInstanceInfo, GetNodeInfo, GetCluster) has been updated and the
|
636 | e00fb268 | Iustin Pop | caller wants the modifications saved to the backing store. Note
|
637 | e00fb268 | Iustin Pop | that all modified objects will be saved, but the target argument
|
638 | e00fb268 | Iustin Pop | is the one the caller wants to ensure that it's saved.
|
639 | e00fb268 | Iustin Pop |
|
640 | e00fb268 | Iustin Pop | """
|
641 | e00fb268 | Iustin Pop | if self._config_data is None: |
642 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Configuration file not read," |
643 | 3ecf6786 | Iustin Pop | " cannot save.")
|
644 | e00fb268 | Iustin Pop | if isinstance(target, objects.Cluster): |
645 | e00fb268 | Iustin Pop | test = target == self._config_data.cluster
|
646 | e00fb268 | Iustin Pop | elif isinstance(target, objects.Node): |
647 | e00fb268 | Iustin Pop | test = target in self._config_data.nodes.values() |
648 | e00fb268 | Iustin Pop | elif isinstance(target, objects.Instance): |
649 | e00fb268 | Iustin Pop | test = target in self._config_data.instances.values() |
650 | e00fb268 | Iustin Pop | else:
|
651 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Invalid object type (%s) passed to" |
652 | 3ecf6786 | Iustin Pop | " ConfigWriter.Update" % type(target)) |
653 | e00fb268 | Iustin Pop | if not test: |
654 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("Configuration updated since object" |
655 | 3ecf6786 | Iustin Pop | " has been read or unknown object")
|
656 | e00fb268 | Iustin Pop | self._WriteConfig() |