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annotate planemo/lib/python3.7/site-packages/boto/pyami/installers/ubuntu/ebs.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
parents d30785e31577
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1 # Copyright (c) 2006-2009 Mitch Garnaat http://garnaat.org/
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2 #
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3 # Permission is hereby granted, free of charge, to any person obtaining a
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4 # copy of this software and associated documentation files (the
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5 # "Software"), to deal in the Software without restriction, including
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6 # without limitation the rights to use, copy, modify, merge, publish, dis-
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7 # tribute, sublicense, and/or sell copies of the Software, and to permit
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8 # persons to whom the Software is furnished to do so, subject to the fol-
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9 # lowing conditions:
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10 #
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11 # The above copyright notice and this permission notice shall be included
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12 # in all copies or substantial portions of the Software.
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13 #
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14 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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15 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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16 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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17 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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18 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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19 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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20 # IN THE SOFTWARE.
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21 #
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22 """
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23 Automated installer to attach, format and mount an EBS volume.
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24 This installer assumes that you want the volume formatted as
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25 an XFS file system. To drive this installer, you need the
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26 following section in the boto config passed to the new instance.
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27 You also need to install dateutil by listing python-dateutil
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28 in the list of packages to be installed in the Pyami seciont
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29 of your boto config file.
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30
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31 If there is already a device mounted at the specified mount point,
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32 the installer assumes that it is the ephemeral drive and unmounts
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33 it, remounts it as /tmp and chmods it to 777.
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34
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35 Config file section::
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36
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37 [EBS]
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38 volume_id = <the id of the EBS volume, should look like vol-xxxxxxxx>
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39 logical_volume_name = <the name of the logical volume that contaings
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40 a reference to the physical volume to be mounted. If this parameter
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41 is supplied, it overrides the volume_id setting.>
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42 device = <the linux device the EBS volume should be mounted on>
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43 mount_point = <directory to mount device, defaults to /ebs>
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44
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45 """
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46 import boto
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47 from boto.manage.volume import Volume
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48 from boto.exception import EC2ResponseError
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49 import os, time
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50 from boto.pyami.installers.ubuntu.installer import Installer
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51 from string import Template
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52
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53 BackupScriptTemplate = """#!/usr/bin/env python
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54 # Backup EBS volume
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55 import boto
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56 from boto.pyami.scriptbase import ScriptBase
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57 import traceback
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58
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59 class Backup(ScriptBase):
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60
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61 def main(self):
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62 try:
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63 ec2 = boto.connect_ec2()
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64 self.run("/usr/sbin/xfs_freeze -f ${mount_point}", exit_on_error = True)
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65 snapshot = ec2.create_snapshot('${volume_id}')
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66 boto.log.info("Snapshot created: %s " % snapshot)
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67 except Exception as e:
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68 self.notify(subject="${instance_id} Backup Failed", body=traceback.format_exc())
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69 boto.log.info("Snapshot created: ${volume_id}")
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70 except Exception as e:
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71 self.notify(subject="${instance_id} Backup Failed", body=traceback.format_exc())
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72 finally:
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73 self.run("/usr/sbin/xfs_freeze -u ${mount_point}")
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74
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75 if __name__ == "__main__":
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76 b = Backup()
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77 b.main()
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78 """
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79
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80 BackupCleanupScript= """#!/usr/bin/env python
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81 import boto
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82 from boto.manage.volume import Volume
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83
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84 # Cleans Backups of EBS volumes
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85
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86 for v in Volume.all():
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87 v.trim_snapshots(True)
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88 """
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89
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90 TagBasedBackupCleanupScript= """#!/usr/bin/env python
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91 import boto
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92
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93 # Cleans Backups of EBS volumes
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94
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95 ec2 = boto.connect_ec2()
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96 ec2.trim_snapshots()
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97 """
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98
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99 class EBSInstaller(Installer):
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100 """
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101 Set up the EBS stuff
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102 """
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103
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104 def __init__(self, config_file=None):
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105 super(EBSInstaller, self).__init__(config_file)
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106 self.instance_id = boto.config.get('Instance', 'instance-id')
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107 self.device = boto.config.get('EBS', 'device', '/dev/sdp')
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108 self.volume_id = boto.config.get('EBS', 'volume_id')
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109 self.logical_volume_name = boto.config.get('EBS', 'logical_volume_name')
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110 self.mount_point = boto.config.get('EBS', 'mount_point', '/ebs')
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111
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112 def attach(self):
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113 ec2 = boto.connect_ec2()
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114 if self.logical_volume_name:
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115 # if a logical volume was specified, override the specified volume_id
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116 # (if there was one) with the current AWS volume for the logical volume:
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117 logical_volume = next(Volume.find(name=self.logical_volume_name))
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118 self.volume_id = logical_volume._volume_id
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119 volume = ec2.get_all_volumes([self.volume_id])[0]
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120 # wait for the volume to be available. The volume may still be being created
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121 # from a snapshot.
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122 while volume.update() != 'available':
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123 boto.log.info('Volume %s not yet available. Current status = %s.' % (volume.id, volume.status))
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124 time.sleep(5)
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125 instance = ec2.get_only_instances([self.instance_id])[0]
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126 attempt_attach = True
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127 while attempt_attach:
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128 try:
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129 ec2.attach_volume(self.volume_id, self.instance_id, self.device)
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130 attempt_attach = False
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131 except EC2ResponseError as e:
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132 if e.error_code != 'IncorrectState':
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133 # if there's an EC2ResonseError with the code set to IncorrectState, delay a bit for ec2
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134 # to realize the instance is running, then try again. Otherwise, raise the error:
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135 boto.log.info('Attempt to attach the EBS volume %s to this instance (%s) returned %s. Trying again in a bit.' % (self.volume_id, self.instance_id, e.errors))
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136 time.sleep(2)
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137 else:
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138 raise e
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139 boto.log.info('Attached volume %s to instance %s as device %s' % (self.volume_id, self.instance_id, self.device))
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140 # now wait for the volume device to appear
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141 while not os.path.exists(self.device):
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142 boto.log.info('%s still does not exist, waiting 2 seconds' % self.device)
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143 time.sleep(2)
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144
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145 def make_fs(self):
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146 boto.log.info('make_fs...')
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147 has_fs = self.run('fsck %s' % self.device)
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148 if has_fs != 0:
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149 self.run('mkfs -t xfs %s' % self.device)
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150
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151 def create_backup_script(self):
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152 t = Template(BackupScriptTemplate)
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153 s = t.substitute(volume_id=self.volume_id, instance_id=self.instance_id,
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154 mount_point=self.mount_point)
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155 fp = open('/usr/local/bin/ebs_backup', 'w')
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156 fp.write(s)
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157 fp.close()
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158 self.run('chmod +x /usr/local/bin/ebs_backup')
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159
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160 def create_backup_cleanup_script(self, use_tag_based_cleanup=False):
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161 fp = open('/usr/local/bin/ebs_backup_cleanup', 'w')
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162 if use_tag_based_cleanup:
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163 fp.write(TagBasedBackupCleanupScript)
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164 else:
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165 fp.write(BackupCleanupScript)
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166 fp.close()
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167 self.run('chmod +x /usr/local/bin/ebs_backup_cleanup')
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168
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169 def handle_mount_point(self):
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170 boto.log.info('handle_mount_point')
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171 if not os.path.isdir(self.mount_point):
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172 boto.log.info('making directory')
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173 # mount directory doesn't exist so create it
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174 self.run("mkdir %s" % self.mount_point)
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175 else:
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176 boto.log.info('directory exists already')
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177 self.run('mount -l')
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178 lines = self.last_command.output.split('\n')
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179 for line in lines:
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180 t = line.split()
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181 if t and t[2] == self.mount_point:
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182 # something is already mounted at the mount point
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183 # unmount that and mount it as /tmp
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184 if t[0] != self.device:
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185 self.run('umount %s' % self.mount_point)
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186 self.run('mount %s /tmp' % t[0])
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187 break
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188 self.run('chmod 777 /tmp')
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189 # Mount up our new EBS volume onto mount_point
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190 self.run("mount %s %s" % (self.device, self.mount_point))
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191 self.run('xfs_growfs %s' % self.mount_point)
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192
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193 def update_fstab(self):
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194 f = open("/etc/fstab", "a")
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195 f.write('%s\t%s\txfs\tdefaults 0 0\n' % (self.device, self.mount_point))
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196 f.close()
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197
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198 def install(self):
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199 # First, find and attach the volume
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200 self.attach()
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201
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202 # Install the xfs tools
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203 self.run('apt-get -y install xfsprogs xfsdump')
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204
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205 # Check to see if the filesystem was created or not
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206 self.make_fs()
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207
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208 # create the /ebs directory for mounting
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209 self.handle_mount_point()
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210
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211 # create the backup script
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212 self.create_backup_script()
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213
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214 # Set up the backup script
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215 minute = boto.config.get('EBS', 'backup_cron_minute', '0')
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216 hour = boto.config.get('EBS', 'backup_cron_hour', '4,16')
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217 self.add_cron("ebs_backup", "/usr/local/bin/ebs_backup", minute=minute, hour=hour)
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218
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219 # Set up the backup cleanup script
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220 minute = boto.config.get('EBS', 'backup_cleanup_cron_minute')
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221 hour = boto.config.get('EBS', 'backup_cleanup_cron_hour')
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222 if (minute is not None) and (hour is not None):
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223 # Snapshot clean up can either be done via the manage module, or via the new tag based
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224 # snapshot code, if the snapshots have been tagged with the name of the associated
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225 # volume. Check for the presence of the new configuration flag, and use the appropriate
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226 # cleanup method / script:
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227 use_tag_based_cleanup = boto.config.has_option('EBS', 'use_tag_based_snapshot_cleanup')
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228 self.create_backup_cleanup_script(use_tag_based_cleanup)
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229 self.add_cron("ebs_backup_cleanup", "/usr/local/bin/ebs_backup_cleanup", minute=minute, hour=hour)
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230
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231 # Set up the fstab
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232 self.update_fstab()
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233
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234 def main(self):
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235 if not os.path.exists(self.device):
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236 self.install()
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237 else:
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238 boto.log.info("Device %s is already attached, skipping EBS Installer" % self.device)