root / lib / storage / gluster.py @ 653bc0f1
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1 | 8106dd64 | Santi Raffa | #
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2 | 8106dd64 | Santi Raffa | #
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3 | 8106dd64 | Santi Raffa | |
4 | 8106dd64 | Santi Raffa | # Copyright (C) 2013 Google Inc.
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5 | 8106dd64 | Santi Raffa | #
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6 | 8106dd64 | Santi Raffa | # This program is free software; you can redistribute it and/or modify
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7 | 8106dd64 | Santi Raffa | # it under the terms of the GNU General Public License as published by
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8 | 8106dd64 | Santi Raffa | # the Free Software Foundation; either version 2 of the License, or
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9 | 8106dd64 | Santi Raffa | # (at your option) any later version.
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10 | 8106dd64 | Santi Raffa | #
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11 | 8106dd64 | Santi Raffa | # This program is distributed in the hope that it will be useful, but
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12 | 8106dd64 | Santi Raffa | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 8106dd64 | Santi Raffa | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 8106dd64 | Santi Raffa | # General Public License for more details.
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15 | 8106dd64 | Santi Raffa | #
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16 | 8106dd64 | Santi Raffa | # You should have received a copy of the GNU General Public License
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17 | 8106dd64 | Santi Raffa | # along with this program; if not, write to the Free Software
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18 | 8106dd64 | Santi Raffa | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | 8106dd64 | Santi Raffa | # 02110-1301, USA.
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20 | 8106dd64 | Santi Raffa | |
21 | 8106dd64 | Santi Raffa | """Gluster storage class.
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22 | 8106dd64 | Santi Raffa |
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23 | 8106dd64 | Santi Raffa | This class is very similar to FileStorage, given that Gluster when mounted
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24 | 8106dd64 | Santi Raffa | behaves essentially like a regular file system. Unlike RBD, there are no
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25 | 8106dd64 | Santi Raffa | special provisions for block device abstractions (yet).
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26 | 8106dd64 | Santi Raffa |
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27 | 8106dd64 | Santi Raffa | """
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28 | 58793040 | Santi Raffa | import logging |
29 | 58793040 | Santi Raffa | import os |
30 | 58793040 | Santi Raffa | import socket |
31 | 58793040 | Santi Raffa | |
32 | 58793040 | Santi Raffa | from ganeti import utils |
33 | 8106dd64 | Santi Raffa | from ganeti import errors |
34 | 58793040 | Santi Raffa | from ganeti import netutils |
35 | 58793040 | Santi Raffa | from ganeti import constants |
36 | 845b7ed1 | Santi Raffa | from ganeti import ssconf |
37 | 8106dd64 | Santi Raffa | |
38 | 58793040 | Santi Raffa | from ganeti.utils import io |
39 | 8106dd64 | Santi Raffa | from ganeti.storage import base |
40 | 8106dd64 | Santi Raffa | from ganeti.storage.filestorage import FileDeviceHelper |
41 | 8106dd64 | Santi Raffa | |
42 | 8106dd64 | Santi Raffa | |
43 | 58793040 | Santi Raffa | class GlusterVolume(object): |
44 | 58793040 | Santi Raffa | """This class represents a Gluster volume.
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45 | 58793040 | Santi Raffa |
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46 | 58793040 | Santi Raffa | Volumes are uniquely identified by:
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47 | 58793040 | Santi Raffa |
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48 | 58793040 | Santi Raffa | - their IP address
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49 | 58793040 | Santi Raffa | - their port
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50 | 58793040 | Santi Raffa | - the volume name itself
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51 | 58793040 | Santi Raffa |
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52 | 58793040 | Santi Raffa | Two GlusterVolume objects x, y with same IP address, port and volume name
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53 | 58793040 | Santi Raffa | are considered equal.
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54 | 58793040 | Santi Raffa |
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55 | 58793040 | Santi Raffa | """
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56 | 58793040 | Santi Raffa | |
57 | ac156ecd | Santi Raffa | def __init__(self, server_addr, port, volume, _run_cmd=utils.RunCmd, |
58 | ac156ecd | Santi Raffa | _mount_point=None):
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59 | 58793040 | Santi Raffa | """Creates a Gluster volume object.
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60 | 58793040 | Santi Raffa |
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61 | 58793040 | Santi Raffa | @type server_addr: str
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62 | 58793040 | Santi Raffa | @param server_addr: The address to connect to
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63 | 58793040 | Santi Raffa |
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64 | 58793040 | Santi Raffa | @type port: int
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65 | 58793040 | Santi Raffa | @param port: The port to connect to (Gluster standard is 24007)
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66 | 58793040 | Santi Raffa |
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67 | 58793040 | Santi Raffa | @type volume: str
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68 | 58793040 | Santi Raffa | @param volume: The gluster volume to use for storage.
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69 | 58793040 | Santi Raffa |
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70 | 58793040 | Santi Raffa | """
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71 | 58793040 | Santi Raffa | self.server_addr = server_addr
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72 | 58793040 | Santi Raffa | server_ip = netutils.Hostname.GetIP(self.server_addr)
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73 | 58793040 | Santi Raffa | self._server_ip = server_ip
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74 | 58793040 | Santi Raffa | port = netutils.ValidatePortNumber(port) |
75 | 58793040 | Santi Raffa | self._port = port
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76 | 58793040 | Santi Raffa | self._volume = volume
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77 | ac156ecd | Santi Raffa | if _mount_point: # tests |
78 | ac156ecd | Santi Raffa | self.mount_point = _mount_point
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79 | ac156ecd | Santi Raffa | else:
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80 | ac156ecd | Santi Raffa | self.mount_point = ssconf.SimpleStore().GetGlusterStorageDir()
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81 | 58793040 | Santi Raffa | |
82 | 58793040 | Santi Raffa | self._run_cmd = _run_cmd
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83 | 58793040 | Santi Raffa | |
84 | 58793040 | Santi Raffa | @property
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85 | 58793040 | Santi Raffa | def server_ip(self): |
86 | 58793040 | Santi Raffa | return self._server_ip |
87 | 58793040 | Santi Raffa | |
88 | 58793040 | Santi Raffa | @property
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89 | 58793040 | Santi Raffa | def port(self): |
90 | 58793040 | Santi Raffa | return self._port |
91 | 58793040 | Santi Raffa | |
92 | 58793040 | Santi Raffa | @property
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93 | 58793040 | Santi Raffa | def volume(self): |
94 | 58793040 | Santi Raffa | return self._volume |
95 | 58793040 | Santi Raffa | |
96 | 58793040 | Santi Raffa | def __eq__(self, other): |
97 | 58793040 | Santi Raffa | return (self.server_ip, self.port, self.volume) == \ |
98 | 58793040 | Santi Raffa | (other.server_ip, other.port, other.volume) |
99 | 58793040 | Santi Raffa | |
100 | 58793040 | Santi Raffa | def __repr__(self): |
101 | 58793040 | Santi Raffa | return """GlusterVolume("{ip}", {port}, "{volume}")""" \ |
102 | 58793040 | Santi Raffa | .format(ip=self.server_ip, port=self.port, volume=self.volume) |
103 | 58793040 | Santi Raffa | |
104 | 58793040 | Santi Raffa | def __hash__(self): |
105 | 58793040 | Santi Raffa | return (self.server_ip, self.port, self.volume).__hash__() |
106 | 58793040 | Santi Raffa | |
107 | 58793040 | Santi Raffa | def _IsMounted(self): |
108 | 58793040 | Santi Raffa | """Checks if we are mounted or not.
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109 | 58793040 | Santi Raffa |
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110 | 58793040 | Santi Raffa | @rtype: bool
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111 | 58793040 | Santi Raffa | @return: True if this volume is mounted.
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112 | 58793040 | Santi Raffa |
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113 | 58793040 | Santi Raffa | """
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114 | 58793040 | Santi Raffa | if not os.path.exists(self.mount_point): |
115 | 58793040 | Santi Raffa | return False |
116 | 58793040 | Santi Raffa | |
117 | 58793040 | Santi Raffa | return os.path.ismount(self.mount_point) |
118 | 58793040 | Santi Raffa | |
119 | 58793040 | Santi Raffa | def _GuessMountFailReasons(self): |
120 | 58793040 | Santi Raffa | """Try and give reasons why the mount might've failed.
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121 | 58793040 | Santi Raffa |
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122 | 58793040 | Santi Raffa | @rtype: str
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123 | 58793040 | Santi Raffa | @return: A semicolon-separated list of problems found with the current setup
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124 | 58793040 | Santi Raffa | suitable for display to the user.
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125 | 58793040 | Santi Raffa |
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126 | 58793040 | Santi Raffa | """
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127 | 58793040 | Santi Raffa | |
128 | 58793040 | Santi Raffa | reasons = [] |
129 | 58793040 | Santi Raffa | |
130 | 58793040 | Santi Raffa | # Does the mount point exist?
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131 | 58793040 | Santi Raffa | if not os.path.exists(self.mount_point): |
132 | 58793040 | Santi Raffa | reasons.append("%r: does not exist" % self.mount_point) |
133 | 58793040 | Santi Raffa | |
134 | 58793040 | Santi Raffa | # Okay, it exists, but is it a directory?
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135 | 58793040 | Santi Raffa | elif not os.path.isdir(self.mount_point): |
136 | 58793040 | Santi Raffa | reasons.append("%r: not a directory" % self.mount_point) |
137 | 58793040 | Santi Raffa | |
138 | 58793040 | Santi Raffa | # If, for some unfortunate reason, this folder exists before mounting:
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139 | 58793040 | Santi Raffa | #
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140 | 58793040 | Santi Raffa | # /var/run/ganeti/gluster/gv0/10.0.0.1:30000:gv0/
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141 | 58793040 | Santi Raffa | # '--------- cwd ------------'
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142 | 58793040 | Santi Raffa | #
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143 | 58793040 | Santi Raffa | # and you _are_ trying to mount the gluster volume gv0 on 10.0.0.1:30000,
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144 | 58793040 | Santi Raffa | # then the mount.glusterfs command parser gets confused and this command:
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145 | 58793040 | Santi Raffa | #
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146 | 58793040 | Santi Raffa | # mount -t glusterfs 10.0.0.1:30000:gv0 /var/run/ganeti/gluster/gv0
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147 | 58793040 | Santi Raffa | # '-- remote end --' '------ mountpoint -------'
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148 | 58793040 | Santi Raffa | #
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149 | 58793040 | Santi Raffa | # gets parsed instead like this:
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150 | 58793040 | Santi Raffa | #
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151 | 58793040 | Santi Raffa | # mount -t glusterfs 10.0.0.1:30000:gv0 /var/run/ganeti/gluster/gv0
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152 | 58793040 | Santi Raffa | # '-- mountpoint --' '----- syntax error ------'
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153 | 58793040 | Santi Raffa | #
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154 | 58793040 | Santi Raffa | # and if there _is_ a gluster server running locally at the default remote
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155 | 58793040 | Santi Raffa | # end, localhost:24007, then this is not a network error and therefore... no
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156 | 58793040 | Santi Raffa | # usage message gets printed out. All you get is a Byson parser error in the
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157 | 58793040 | Santi Raffa | # gluster log files about an unexpected token in line 1, "". (That's stdin.)
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158 | 58793040 | Santi Raffa | #
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159 | 58793040 | Santi Raffa | # Not that we rely on that output in any way whatsoever...
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160 | 58793040 | Santi Raffa | |
161 | 58793040 | Santi Raffa | parser_confusing = io.PathJoin(self.mount_point,
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162 | 58793040 | Santi Raffa | self._GetFUSEMountString())
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163 | 58793040 | Santi Raffa | if os.path.exists(parser_confusing):
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164 | 58793040 | Santi Raffa | reasons.append("%r: please delete, rename or move." % parser_confusing)
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165 | 58793040 | Santi Raffa | |
166 | 58793040 | Santi Raffa | # Let's try something else: can we connect to the server?
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167 | 58793040 | Santi Raffa | sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
168 | 58793040 | Santi Raffa | try:
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169 | 58793040 | Santi Raffa | sock.connect((self.server_ip, self.port)) |
170 | 58793040 | Santi Raffa | sock.close() |
171 | 58793040 | Santi Raffa | except socket.error as err: |
172 | 58793040 | Santi Raffa | reasons.append("%s:%d: %s" % (self.server_ip, self.port, err.strerror)) |
173 | 58793040 | Santi Raffa | |
174 | 58793040 | Santi Raffa | reasons.append("try running 'gluster volume info %s' on %s to ensure"
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175 | 58793040 | Santi Raffa | " it exists, it is started and it is using the tcp"
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176 | 58793040 | Santi Raffa | " transport" % (self.volume, self.server_ip)) |
177 | 58793040 | Santi Raffa | |
178 | 58793040 | Santi Raffa | return "; ".join(reasons) |
179 | 58793040 | Santi Raffa | |
180 | 58793040 | Santi Raffa | def _GetFUSEMountString(self): |
181 | 58793040 | Santi Raffa | """Return the string FUSE needs to mount this volume.
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182 | 58793040 | Santi Raffa |
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183 | 58793040 | Santi Raffa | @rtype: str
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184 | 58793040 | Santi Raffa | """
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185 | 58793040 | Santi Raffa | |
186 | 58793040 | Santi Raffa | return "{ip}:{port}:{volume}" \ |
187 | 58793040 | Santi Raffa | .format(ip=self.server_ip, port=self.port, volume=self.volume) |
188 | 58793040 | Santi Raffa | |
189 | 58793040 | Santi Raffa | def GetKVMMountString(self, path): |
190 | 58793040 | Santi Raffa | """Return the string KVM needs to use this volume.
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191 | 58793040 | Santi Raffa |
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192 | 58793040 | Santi Raffa | @rtype: str
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193 | 58793040 | Santi Raffa | """
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194 | 58793040 | Santi Raffa | |
195 | 58793040 | Santi Raffa | ip = self.server_ip
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196 | 58793040 | Santi Raffa | if netutils.IPAddress.GetAddressFamily(ip) == socket.AF_INET6:
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197 | 58793040 | Santi Raffa | ip = "[%s]" % ip
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198 | 58793040 | Santi Raffa | return "gluster://{ip}:{port}/{volume}/{path}" \ |
199 | 58793040 | Santi Raffa | .format(ip=ip, port=self.port, volume=self.volume, path=path) |
200 | 58793040 | Santi Raffa | |
201 | 58793040 | Santi Raffa | def Mount(self): |
202 | 58793040 | Santi Raffa | """Try and mount the volume. No-op if the volume is already mounted.
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203 | 58793040 | Santi Raffa |
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204 | 58793040 | Santi Raffa | @raises BlockDeviceError: if the mount was unsuccessful
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205 | 58793040 | Santi Raffa |
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206 | 58793040 | Santi Raffa | @rtype: context manager
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207 | 58793040 | Santi Raffa | @return: A simple context manager that lets you use this volume for
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208 | 58793040 | Santi Raffa | short lived operations like so::
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209 | 58793040 | Santi Raffa |
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210 | 58793040 | Santi Raffa | with volume.mount():
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211 | 58793040 | Santi Raffa | # Do operations on volume
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212 | 58793040 | Santi Raffa | # Volume is now unmounted
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213 | 58793040 | Santi Raffa |
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214 | 58793040 | Santi Raffa | """
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215 | 58793040 | Santi Raffa | |
216 | 58793040 | Santi Raffa | class _GlusterVolumeContextManager(object): |
217 | 58793040 | Santi Raffa | |
218 | 58793040 | Santi Raffa | def __init__(self, volume): |
219 | 58793040 | Santi Raffa | self.volume = volume
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220 | 58793040 | Santi Raffa | |
221 | 58793040 | Santi Raffa | def __enter__(self): |
222 | 58793040 | Santi Raffa | # We're already mounted.
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223 | 58793040 | Santi Raffa | return self |
224 | 58793040 | Santi Raffa | |
225 | 58793040 | Santi Raffa | def __exit__(self, *exception_information): |
226 | 58793040 | Santi Raffa | self.volume.Unmount()
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227 | 58793040 | Santi Raffa | return False # do not swallow exceptions. |
228 | 58793040 | Santi Raffa | |
229 | 58793040 | Santi Raffa | if self._IsMounted(): |
230 | 58793040 | Santi Raffa | return _GlusterVolumeContextManager(self) |
231 | 58793040 | Santi Raffa | |
232 | 58793040 | Santi Raffa | command = ["mount",
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233 | 58793040 | Santi Raffa | "-t", "glusterfs", |
234 | 58793040 | Santi Raffa | self._GetFUSEMountString(),
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235 | 58793040 | Santi Raffa | self.mount_point]
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236 | 58793040 | Santi Raffa | |
237 | 58793040 | Santi Raffa | io.Makedirs(self.mount_point)
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238 | 58793040 | Santi Raffa | self._run_cmd(" ".join(command), |
239 | 58793040 | Santi Raffa | # Why set cwd? Because it's an area we control. If,
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240 | 58793040 | Santi Raffa | # for some unfortunate reason, this folder exists:
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241 | 58793040 | Santi Raffa | # "/%s/" % _GetFUSEMountString()
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242 | 58793040 | Santi Raffa | # ...then the gluster parser gets confused and treats
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243 | 58793040 | Santi Raffa | # _GetFUSEMountString() as your mount point and
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244 | 58793040 | Santi Raffa | # self.mount_point becomes a syntax error.
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245 | 58793040 | Santi Raffa | cwd=self.mount_point)
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246 | 58793040 | Santi Raffa | |
247 | 58793040 | Santi Raffa | # mount.glusterfs exits with code 0 even after failure.
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248 | 58793040 | Santi Raffa | # https://bugzilla.redhat.com/show_bug.cgi?id=1031973
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249 | 58793040 | Santi Raffa | if not self._IsMounted(): |
250 | 58793040 | Santi Raffa | reasons = self._GuessMountFailReasons()
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251 | 58793040 | Santi Raffa | if not reasons: |
252 | 58793040 | Santi Raffa | reasons = "%r failed." % (" ".join(command)) |
253 | 58793040 | Santi Raffa | base.ThrowError("%r: mount failure: %s",
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254 | 58793040 | Santi Raffa | self.mount_point,
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255 | 58793040 | Santi Raffa | reasons) |
256 | 58793040 | Santi Raffa | |
257 | 58793040 | Santi Raffa | return _GlusterVolumeContextManager(self) |
258 | 58793040 | Santi Raffa | |
259 | 58793040 | Santi Raffa | def Unmount(self): |
260 | 58793040 | Santi Raffa | """Try and unmount the volume.
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261 | 58793040 | Santi Raffa |
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262 | 58793040 | Santi Raffa | Failures are logged but otherwise ignored.
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263 | 58793040 | Santi Raffa |
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264 | 58793040 | Santi Raffa | @raises BlockDeviceError: if the volume was not mounted to begin with.
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265 | 58793040 | Santi Raffa | """
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266 | 58793040 | Santi Raffa | |
267 | 58793040 | Santi Raffa | if not self._IsMounted(): |
268 | 58793040 | Santi Raffa | base.ThrowError("%r: should be mounted but isn't.", self.mount_point) |
269 | 58793040 | Santi Raffa | |
270 | 58793040 | Santi Raffa | result = self._run_cmd(["umount", |
271 | 58793040 | Santi Raffa | self.mount_point])
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272 | 58793040 | Santi Raffa | |
273 | 58793040 | Santi Raffa | if result.failed:
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274 | 58793040 | Santi Raffa | logging.warning("Failed to unmount %r from %r: %s",
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275 | 58793040 | Santi Raffa | self, self.mount_point, result.fail_reason) |
276 | 58793040 | Santi Raffa | |
277 | 58793040 | Santi Raffa | |
278 | 8106dd64 | Santi Raffa | class GlusterStorage(base.BlockDev): |
279 | 8106dd64 | Santi Raffa | """File device using the Gluster backend.
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280 | 8106dd64 | Santi Raffa |
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281 | 845b7ed1 | Santi Raffa | This class represents a file storage backend device stored on Gluster. Ganeti
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282 | 845b7ed1 | Santi Raffa | mounts and unmounts the Gluster devices automatically.
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283 | 8106dd64 | Santi Raffa |
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284 | 8106dd64 | Santi Raffa | The unique_id for the file device is a (file_driver, file_path) tuple.
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285 | 8106dd64 | Santi Raffa |
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286 | 8106dd64 | Santi Raffa | """
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287 | c032b2ce | Klaus Aehlig | def __init__(self, unique_id, children, size, params, dyn_params, *args): |
288 | 8106dd64 | Santi Raffa | """Initalizes a file device backend.
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289 | 8106dd64 | Santi Raffa |
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290 | 8106dd64 | Santi Raffa | """
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291 | 8106dd64 | Santi Raffa | if children:
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292 | 8106dd64 | Santi Raffa | base.ThrowError("Invalid setup for file device")
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293 | 8106dd64 | Santi Raffa | |
294 | 845b7ed1 | Santi Raffa | try:
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295 | 845b7ed1 | Santi Raffa | driver, path = unique_id |
296 | 845b7ed1 | Santi Raffa | except ValueError: # wrong number of arguments |
297 | 845b7ed1 | Santi Raffa | raise ValueError("Invalid configuration data %s" % repr(unique_id)) |
298 | 845b7ed1 | Santi Raffa | |
299 | 845b7ed1 | Santi Raffa | server_addr = params[constants.GLUSTER_HOST] |
300 | 845b7ed1 | Santi Raffa | port = params[constants.GLUSTER_PORT] |
301 | 845b7ed1 | Santi Raffa | volume = params[constants.GLUSTER_VOLUME] |
302 | 845b7ed1 | Santi Raffa | |
303 | 845b7ed1 | Santi Raffa | self.volume = GlusterVolume(server_addr, port, volume)
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304 | 845b7ed1 | Santi Raffa | self.path = path
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305 | 845b7ed1 | Santi Raffa | self.driver = driver
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306 | 845b7ed1 | Santi Raffa | self.full_path = io.PathJoin(self.volume.mount_point, self.path) |
307 | 845b7ed1 | Santi Raffa | self.file = None |
308 | 845b7ed1 | Santi Raffa | |
309 | 845b7ed1 | Santi Raffa | super(GlusterStorage, self).__init__(unique_id, children, size, |
310 | c032b2ce | Klaus Aehlig | params, dyn_params, *args) |
311 | 8106dd64 | Santi Raffa | |
312 | 8106dd64 | Santi Raffa | self.Attach()
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313 | 8106dd64 | Santi Raffa | |
314 | 8106dd64 | Santi Raffa | def Assemble(self): |
315 | 8106dd64 | Santi Raffa | """Assemble the device.
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316 | 8106dd64 | Santi Raffa |
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317 | 8106dd64 | Santi Raffa | Checks whether the file device exists, raises BlockDeviceError otherwise.
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318 | 8106dd64 | Santi Raffa |
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319 | 8106dd64 | Santi Raffa | """
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320 | 8106dd64 | Santi Raffa | assert self.attached, "Gluster file assembled without being attached" |
321 | 8106dd64 | Santi Raffa | self.file.Exists(assert_exists=True) |
322 | 8106dd64 | Santi Raffa | |
323 | 8106dd64 | Santi Raffa | def Shutdown(self): |
324 | 8106dd64 | Santi Raffa | """Shutdown the device.
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325 | 8106dd64 | Santi Raffa |
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326 | 8106dd64 | Santi Raffa | """
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327 | 8106dd64 | Santi Raffa | |
328 | 8106dd64 | Santi Raffa | self.file = None |
329 | 8106dd64 | Santi Raffa | self.dev_path = None |
330 | 8106dd64 | Santi Raffa | self.attached = False |
331 | 8106dd64 | Santi Raffa | |
332 | 8106dd64 | Santi Raffa | def Open(self, force=False): |
333 | 8106dd64 | Santi Raffa | """Make the device ready for I/O.
|
334 | 8106dd64 | Santi Raffa |
|
335 | 8106dd64 | Santi Raffa | This is a no-op for the file type.
|
336 | 8106dd64 | Santi Raffa |
|
337 | 8106dd64 | Santi Raffa | """
|
338 | 8106dd64 | Santi Raffa | assert self.attached, "Gluster file opened without being attached" |
339 | 8106dd64 | Santi Raffa | |
340 | 8106dd64 | Santi Raffa | def Close(self): |
341 | 8106dd64 | Santi Raffa | """Notifies that the device will no longer be used for I/O.
|
342 | 8106dd64 | Santi Raffa |
|
343 | 8106dd64 | Santi Raffa | This is a no-op for the file type.
|
344 | 8106dd64 | Santi Raffa | """
|
345 | 8106dd64 | Santi Raffa | pass
|
346 | 8106dd64 | Santi Raffa | |
347 | 8106dd64 | Santi Raffa | def Remove(self): |
348 | 8106dd64 | Santi Raffa | """Remove the file backing the block device.
|
349 | 8106dd64 | Santi Raffa |
|
350 | 8106dd64 | Santi Raffa | @rtype: boolean
|
351 | 8106dd64 | Santi Raffa | @return: True if the removal was successful
|
352 | 8106dd64 | Santi Raffa |
|
353 | 8106dd64 | Santi Raffa | """
|
354 | 845b7ed1 | Santi Raffa | with self.volume.Mount(): |
355 | 845b7ed1 | Santi Raffa | self.file = FileDeviceHelper(self.full_path) |
356 | 845b7ed1 | Santi Raffa | if self.file.Remove(): |
357 | 845b7ed1 | Santi Raffa | self.file = None |
358 | 845b7ed1 | Santi Raffa | return True |
359 | 845b7ed1 | Santi Raffa | else:
|
360 | 845b7ed1 | Santi Raffa | return False |
361 | 8106dd64 | Santi Raffa | |
362 | 8106dd64 | Santi Raffa | def Rename(self, new_id): |
363 | 8106dd64 | Santi Raffa | """Renames the file.
|
364 | 8106dd64 | Santi Raffa |
|
365 | 8106dd64 | Santi Raffa | """
|
366 | 8106dd64 | Santi Raffa | # TODO: implement rename for file-based storage
|
367 | 8106dd64 | Santi Raffa | base.ThrowError("Rename is not supported for Gluster storage")
|
368 | 8106dd64 | Santi Raffa | |
369 | 8106dd64 | Santi Raffa | def Grow(self, amount, dryrun, backingstore, excl_stor): |
370 | 8106dd64 | Santi Raffa | """Grow the file
|
371 | 8106dd64 | Santi Raffa |
|
372 | 8106dd64 | Santi Raffa | @param amount: the amount (in mebibytes) to grow with
|
373 | 8106dd64 | Santi Raffa |
|
374 | 8106dd64 | Santi Raffa | """
|
375 | 8106dd64 | Santi Raffa | self.file.Grow(amount, dryrun, backingstore, excl_stor)
|
376 | 8106dd64 | Santi Raffa | |
377 | 8106dd64 | Santi Raffa | def Attach(self): |
378 | 8106dd64 | Santi Raffa | """Attach to an existing file.
|
379 | 8106dd64 | Santi Raffa |
|
380 | 8106dd64 | Santi Raffa | Check if this file already exists.
|
381 | 8106dd64 | Santi Raffa |
|
382 | 8106dd64 | Santi Raffa | @rtype: boolean
|
383 | 8106dd64 | Santi Raffa | @return: True if file exists
|
384 | 8106dd64 | Santi Raffa |
|
385 | 8106dd64 | Santi Raffa | """
|
386 | 845b7ed1 | Santi Raffa | try:
|
387 | 845b7ed1 | Santi Raffa | self.volume.Mount()
|
388 | 845b7ed1 | Santi Raffa | self.file = FileDeviceHelper(self.full_path) |
389 | 845b7ed1 | Santi Raffa | self.dev_path = self.full_path |
390 | 845b7ed1 | Santi Raffa | except Exception as err: |
391 | 845b7ed1 | Santi Raffa | self.volume.Unmount()
|
392 | 845b7ed1 | Santi Raffa | raise err
|
393 | 845b7ed1 | Santi Raffa | |
394 | 8106dd64 | Santi Raffa | self.attached = self.file.Exists() |
395 | 8106dd64 | Santi Raffa | return self.attached |
396 | 8106dd64 | Santi Raffa | |
397 | 8106dd64 | Santi Raffa | def GetActualSize(self): |
398 | 8106dd64 | Santi Raffa | """Return the actual disk size.
|
399 | 8106dd64 | Santi Raffa |
|
400 | 8106dd64 | Santi Raffa | @note: the device needs to be active when this is called
|
401 | 8106dd64 | Santi Raffa |
|
402 | 8106dd64 | Santi Raffa | """
|
403 | 8106dd64 | Santi Raffa | return self.file.Size() |
404 | 8106dd64 | Santi Raffa | |
405 | 6488e5bc | Santi Raffa | def GetUserspaceAccessUri(self, hypervisor): |
406 | 6488e5bc | Santi Raffa | """Generate KVM userspace URIs to be used as `-drive file` settings.
|
407 | 6488e5bc | Santi Raffa |
|
408 | 6488e5bc | Santi Raffa | @see: L{BlockDev.GetUserspaceAccessUri}
|
409 | 6488e5bc | Santi Raffa | @see: https://github.com/qemu/qemu/commit/8d6d89cb63c57569864ecdeb84d3a1c2eb
|
410 | 6488e5bc | Santi Raffa | """
|
411 | 6488e5bc | Santi Raffa | |
412 | 6488e5bc | Santi Raffa | if hypervisor == constants.HT_KVM:
|
413 | 6488e5bc | Santi Raffa | return self.volume.GetKVMMountString(self.path) |
414 | 6488e5bc | Santi Raffa | else:
|
415 | 6488e5bc | Santi Raffa | base.ThrowError("Hypervisor %s doesn't support Gluster userspace access" %
|
416 | 6488e5bc | Santi Raffa | hypervisor) |
417 | 6488e5bc | Santi Raffa | |
418 | 8106dd64 | Santi Raffa | @classmethod
|
419 | 8106dd64 | Santi Raffa | def Create(cls, unique_id, children, size, spindles, params, excl_stor, |
420 | bddc92ee | Klaus Aehlig | dyn_params, *args): |
421 | 8106dd64 | Santi Raffa | """Create a new file.
|
422 | 8106dd64 | Santi Raffa |
|
423 | 8106dd64 | Santi Raffa | @param size: the size of file in MiB
|
424 | 8106dd64 | Santi Raffa |
|
425 | 8106dd64 | Santi Raffa | @rtype: L{bdev.FileStorage}
|
426 | 8106dd64 | Santi Raffa | @return: an instance of FileStorage
|
427 | 8106dd64 | Santi Raffa |
|
428 | 8106dd64 | Santi Raffa | """
|
429 | 8106dd64 | Santi Raffa | if excl_stor:
|
430 | 8106dd64 | Santi Raffa | raise errors.ProgrammerError("FileStorage device requested with" |
431 | 8106dd64 | Santi Raffa | " exclusive_storage")
|
432 | 8106dd64 | Santi Raffa | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
433 | 8106dd64 | Santi Raffa | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
434 | 8106dd64 | Santi Raffa | |
435 | 845b7ed1 | Santi Raffa | full_path = unique_id[1]
|
436 | 845b7ed1 | Santi Raffa | |
437 | 845b7ed1 | Santi Raffa | server_addr = params[constants.GLUSTER_HOST] |
438 | 845b7ed1 | Santi Raffa | port = params[constants.GLUSTER_PORT] |
439 | 845b7ed1 | Santi Raffa | volume = params[constants.GLUSTER_VOLUME] |
440 | 845b7ed1 | Santi Raffa | |
441 | 845b7ed1 | Santi Raffa | volume_obj = GlusterVolume(server_addr, port, volume) |
442 | 845b7ed1 | Santi Raffa | full_path = io.PathJoin(volume_obj.mount_point, full_path) |
443 | 845b7ed1 | Santi Raffa | |
444 | 845b7ed1 | Santi Raffa | # Possible optimization: defer actual creation to first Attach, rather
|
445 | 845b7ed1 | Santi Raffa | # than mounting and unmounting here, then remounting immediately after.
|
446 | 845b7ed1 | Santi Raffa | with volume_obj.Mount():
|
447 | 845b7ed1 | Santi Raffa | FileDeviceHelper.CreateFile(full_path, size, create_folders=True)
|
448 | 8106dd64 | Santi Raffa | |
449 | bddc92ee | Klaus Aehlig | return GlusterStorage(unique_id, children, size, params, dyn_params,
|
450 | bddc92ee | Klaus Aehlig | *args) |