root / lib / storage / gluster.py @ ac156ecd
History | View | Annotate | Download (11.6 kB)
1 | 8106dd64 | Santi Raffa | #
|
---|---|---|---|
2 | 8106dd64 | Santi Raffa | #
|
3 | 8106dd64 | Santi Raffa | |
4 | 8106dd64 | Santi Raffa | # Copyright (C) 2013 Google Inc.
|
5 | 8106dd64 | Santi Raffa | #
|
6 | 8106dd64 | Santi Raffa | # This program is free software; you can redistribute it and/or modify
|
7 | 8106dd64 | Santi Raffa | # it under the terms of the GNU General Public License as published by
|
8 | 8106dd64 | Santi Raffa | # the Free Software Foundation; either version 2 of the License, or
|
9 | 8106dd64 | Santi Raffa | # (at your option) any later version.
|
10 | 8106dd64 | Santi Raffa | #
|
11 | 8106dd64 | Santi Raffa | # This program is distributed in the hope that it will be useful, but
|
12 | 8106dd64 | Santi Raffa | # WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 | 8106dd64 | Santi Raffa | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 | 8106dd64 | Santi Raffa | # General Public License for more details.
|
15 | 8106dd64 | Santi Raffa | #
|
16 | 8106dd64 | Santi Raffa | # You should have received a copy of the GNU General Public License
|
17 | 8106dd64 | Santi Raffa | # along with this program; if not, write to the Free Software
|
18 | 8106dd64 | Santi Raffa | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 | 8106dd64 | Santi Raffa | # 02110-1301, USA.
|
20 | 8106dd64 | Santi Raffa | |
21 | 8106dd64 | Santi Raffa | """Gluster storage class.
|
22 | 8106dd64 | Santi Raffa |
|
23 | 8106dd64 | Santi Raffa | This class is very similar to FileStorage, given that Gluster when mounted
|
24 | 8106dd64 | Santi Raffa | behaves essentially like a regular file system. Unlike RBD, there are no
|
25 | 8106dd64 | Santi Raffa | special provisions for block device abstractions (yet).
|
26 | 8106dd64 | Santi Raffa |
|
27 | 8106dd64 | Santi Raffa | """
|
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 | 8106dd64 | Santi Raffa | |
37 | 58793040 | Santi Raffa | from ganeti.utils import io |
38 | 8106dd64 | Santi Raffa | from ganeti.storage import base |
39 | 8106dd64 | Santi Raffa | from ganeti.storage.filestorage import FileDeviceHelper |
40 | 8106dd64 | Santi Raffa | |
41 | 8106dd64 | Santi Raffa | |
42 | 58793040 | Santi Raffa | class GlusterVolume(object): |
43 | 58793040 | Santi Raffa | """This class represents a Gluster volume.
|
44 | 58793040 | Santi Raffa |
|
45 | 58793040 | Santi Raffa | Volumes are uniquely identified by:
|
46 | 58793040 | Santi Raffa |
|
47 | 58793040 | Santi Raffa | - their IP address
|
48 | 58793040 | Santi Raffa | - their port
|
49 | 58793040 | Santi Raffa | - the volume name itself
|
50 | 58793040 | Santi Raffa |
|
51 | 58793040 | Santi Raffa | Two GlusterVolume objects x, y with same IP address, port and volume name
|
52 | 58793040 | Santi Raffa | are considered equal.
|
53 | 58793040 | Santi Raffa |
|
54 | 58793040 | Santi Raffa | """
|
55 | 58793040 | Santi Raffa | |
56 | ac156ecd | Santi Raffa | def __init__(self, server_addr, port, volume, _run_cmd=utils.RunCmd, |
57 | ac156ecd | Santi Raffa | _mount_point=None):
|
58 | 58793040 | Santi Raffa | """Creates a Gluster volume object.
|
59 | 58793040 | Santi Raffa |
|
60 | 58793040 | Santi Raffa | @type server_addr: str
|
61 | 58793040 | Santi Raffa | @param server_addr: The address to connect to
|
62 | 58793040 | Santi Raffa |
|
63 | 58793040 | Santi Raffa | @type port: int
|
64 | 58793040 | Santi Raffa | @param port: The port to connect to (Gluster standard is 24007)
|
65 | 58793040 | Santi Raffa |
|
66 | 58793040 | Santi Raffa | @type volume: str
|
67 | 58793040 | Santi Raffa | @param volume: The gluster volume to use for storage.
|
68 | 58793040 | Santi Raffa |
|
69 | 58793040 | Santi Raffa | """
|
70 | 58793040 | Santi Raffa | self.server_addr = server_addr
|
71 | 58793040 | Santi Raffa | server_ip = netutils.Hostname.GetIP(self.server_addr)
|
72 | 58793040 | Santi Raffa | self._server_ip = server_ip
|
73 | 58793040 | Santi Raffa | port = netutils.ValidatePortNumber(port) |
74 | 58793040 | Santi Raffa | self._port = port
|
75 | 58793040 | Santi Raffa | self._volume = volume
|
76 | ac156ecd | Santi Raffa | if _mount_point: # tests |
77 | ac156ecd | Santi Raffa | self.mount_point = _mount_point
|
78 | ac156ecd | Santi Raffa | else:
|
79 | ac156ecd | Santi Raffa | self.mount_point = ssconf.SimpleStore().GetGlusterStorageDir()
|
80 | 58793040 | Santi Raffa | |
81 | 58793040 | Santi Raffa | self._run_cmd = _run_cmd
|
82 | 58793040 | Santi Raffa | |
83 | 58793040 | Santi Raffa | @property
|
84 | 58793040 | Santi Raffa | def server_ip(self): |
85 | 58793040 | Santi Raffa | return self._server_ip |
86 | 58793040 | Santi Raffa | |
87 | 58793040 | Santi Raffa | @property
|
88 | 58793040 | Santi Raffa | def port(self): |
89 | 58793040 | Santi Raffa | return self._port |
90 | 58793040 | Santi Raffa | |
91 | 58793040 | Santi Raffa | @property
|
92 | 58793040 | Santi Raffa | def volume(self): |
93 | 58793040 | Santi Raffa | return self._volume |
94 | 58793040 | Santi Raffa | |
95 | 58793040 | Santi Raffa | def __eq__(self, other): |
96 | 58793040 | Santi Raffa | return (self.server_ip, self.port, self.volume) == \ |
97 | 58793040 | Santi Raffa | (other.server_ip, other.port, other.volume) |
98 | 58793040 | Santi Raffa | |
99 | 58793040 | Santi Raffa | def __repr__(self): |
100 | 58793040 | Santi Raffa | return """GlusterVolume("{ip}", {port}, "{volume}")""" \ |
101 | 58793040 | Santi Raffa | .format(ip=self.server_ip, port=self.port, volume=self.volume) |
102 | 58793040 | Santi Raffa | |
103 | 58793040 | Santi Raffa | def __hash__(self): |
104 | 58793040 | Santi Raffa | return (self.server_ip, self.port, self.volume).__hash__() |
105 | 58793040 | Santi Raffa | |
106 | 58793040 | Santi Raffa | def _IsMounted(self): |
107 | 58793040 | Santi Raffa | """Checks if we are mounted or not.
|
108 | 58793040 | Santi Raffa |
|
109 | 58793040 | Santi Raffa | @rtype: bool
|
110 | 58793040 | Santi Raffa | @return: True if this volume is mounted.
|
111 | 58793040 | Santi Raffa |
|
112 | 58793040 | Santi Raffa | """
|
113 | 58793040 | Santi Raffa | if not os.path.exists(self.mount_point): |
114 | 58793040 | Santi Raffa | return False |
115 | 58793040 | Santi Raffa | |
116 | 58793040 | Santi Raffa | return os.path.ismount(self.mount_point) |
117 | 58793040 | Santi Raffa | |
118 | 58793040 | Santi Raffa | def _GuessMountFailReasons(self): |
119 | 58793040 | Santi Raffa | """Try and give reasons why the mount might've failed.
|
120 | 58793040 | Santi Raffa |
|
121 | 58793040 | Santi Raffa | @rtype: str
|
122 | 58793040 | Santi Raffa | @return: A semicolon-separated list of problems found with the current setup
|
123 | 58793040 | Santi Raffa | suitable for display to the user.
|
124 | 58793040 | Santi Raffa |
|
125 | 58793040 | Santi Raffa | """
|
126 | 58793040 | Santi Raffa | |
127 | 58793040 | Santi Raffa | reasons = [] |
128 | 58793040 | Santi Raffa | |
129 | 58793040 | Santi Raffa | # Does the mount point exist?
|
130 | 58793040 | Santi Raffa | if not os.path.exists(self.mount_point): |
131 | 58793040 | Santi Raffa | reasons.append("%r: does not exist" % self.mount_point) |
132 | 58793040 | Santi Raffa | |
133 | 58793040 | Santi Raffa | # Okay, it exists, but is it a directory?
|
134 | 58793040 | Santi Raffa | elif not os.path.isdir(self.mount_point): |
135 | 58793040 | Santi Raffa | reasons.append("%r: not a directory" % self.mount_point) |
136 | 58793040 | Santi Raffa | |
137 | 58793040 | Santi Raffa | # If, for some unfortunate reason, this folder exists before mounting:
|
138 | 58793040 | Santi Raffa | #
|
139 | 58793040 | Santi Raffa | # /var/run/ganeti/gluster/gv0/10.0.0.1:30000:gv0/
|
140 | 58793040 | Santi Raffa | # '--------- cwd ------------'
|
141 | 58793040 | Santi Raffa | #
|
142 | 58793040 | Santi Raffa | # and you _are_ trying to mount the gluster volume gv0 on 10.0.0.1:30000,
|
143 | 58793040 | Santi Raffa | # then the mount.glusterfs command parser gets confused and this command:
|
144 | 58793040 | Santi Raffa | #
|
145 | 58793040 | Santi Raffa | # mount -t glusterfs 10.0.0.1:30000:gv0 /var/run/ganeti/gluster/gv0
|
146 | 58793040 | Santi Raffa | # '-- remote end --' '------ mountpoint -------'
|
147 | 58793040 | Santi Raffa | #
|
148 | 58793040 | Santi Raffa | # gets parsed instead like this:
|
149 | 58793040 | Santi Raffa | #
|
150 | 58793040 | Santi Raffa | # mount -t glusterfs 10.0.0.1:30000:gv0 /var/run/ganeti/gluster/gv0
|
151 | 58793040 | Santi Raffa | # '-- mountpoint --' '----- syntax error ------'
|
152 | 58793040 | Santi Raffa | #
|
153 | 58793040 | Santi Raffa | # and if there _is_ a gluster server running locally at the default remote
|
154 | 58793040 | Santi Raffa | # end, localhost:24007, then this is not a network error and therefore... no
|
155 | 58793040 | Santi Raffa | # usage message gets printed out. All you get is a Byson parser error in the
|
156 | 58793040 | Santi Raffa | # gluster log files about an unexpected token in line 1, "". (That's stdin.)
|
157 | 58793040 | Santi Raffa | #
|
158 | 58793040 | Santi Raffa | # Not that we rely on that output in any way whatsoever...
|
159 | 58793040 | Santi Raffa | |
160 | 58793040 | Santi Raffa | parser_confusing = io.PathJoin(self.mount_point,
|
161 | 58793040 | Santi Raffa | self._GetFUSEMountString())
|
162 | 58793040 | Santi Raffa | if os.path.exists(parser_confusing):
|
163 | 58793040 | Santi Raffa | reasons.append("%r: please delete, rename or move." % parser_confusing)
|
164 | 58793040 | Santi Raffa | |
165 | 58793040 | Santi Raffa | # Let's try something else: can we connect to the server?
|
166 | 58793040 | Santi Raffa | sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
167 | 58793040 | Santi Raffa | try:
|
168 | 58793040 | Santi Raffa | sock.connect((self.server_ip, self.port)) |
169 | 58793040 | Santi Raffa | sock.close() |
170 | 58793040 | Santi Raffa | except socket.error as err: |
171 | 58793040 | Santi Raffa | reasons.append("%s:%d: %s" % (self.server_ip, self.port, err.strerror)) |
172 | 58793040 | Santi Raffa | |
173 | 58793040 | Santi Raffa | reasons.append("try running 'gluster volume info %s' on %s to ensure"
|
174 | 58793040 | Santi Raffa | " it exists, it is started and it is using the tcp"
|
175 | 58793040 | Santi Raffa | " transport" % (self.volume, self.server_ip)) |
176 | 58793040 | Santi Raffa | |
177 | 58793040 | Santi Raffa | return "; ".join(reasons) |
178 | 58793040 | Santi Raffa | |
179 | 58793040 | Santi Raffa | def _GetFUSEMountString(self): |
180 | 58793040 | Santi Raffa | """Return the string FUSE needs to mount this volume.
|
181 | 58793040 | Santi Raffa |
|
182 | 58793040 | Santi Raffa | @rtype: str
|
183 | 58793040 | Santi Raffa | """
|
184 | 58793040 | Santi Raffa | |
185 | 58793040 | Santi Raffa | return "{ip}:{port}:{volume}" \ |
186 | 58793040 | Santi Raffa | .format(ip=self.server_ip, port=self.port, volume=self.volume) |
187 | 58793040 | Santi Raffa | |
188 | 58793040 | Santi Raffa | def GetKVMMountString(self, path): |
189 | 58793040 | Santi Raffa | """Return the string KVM needs to use this volume.
|
190 | 58793040 | Santi Raffa |
|
191 | 58793040 | Santi Raffa | @rtype: str
|
192 | 58793040 | Santi Raffa | """
|
193 | 58793040 | Santi Raffa | |
194 | 58793040 | Santi Raffa | ip = self.server_ip
|
195 | 58793040 | Santi Raffa | if netutils.IPAddress.GetAddressFamily(ip) == socket.AF_INET6:
|
196 | 58793040 | Santi Raffa | ip = "[%s]" % ip
|
197 | 58793040 | Santi Raffa | return "gluster://{ip}:{port}/{volume}/{path}" \ |
198 | 58793040 | Santi Raffa | .format(ip=ip, port=self.port, volume=self.volume, path=path) |
199 | 58793040 | Santi Raffa | |
200 | 58793040 | Santi Raffa | def Mount(self): |
201 | 58793040 | Santi Raffa | """Try and mount the volume. No-op if the volume is already mounted.
|
202 | 58793040 | Santi Raffa |
|
203 | 58793040 | Santi Raffa | @raises BlockDeviceError: if the mount was unsuccessful
|
204 | 58793040 | Santi Raffa |
|
205 | 58793040 | Santi Raffa | @rtype: context manager
|
206 | 58793040 | Santi Raffa | @return: A simple context manager that lets you use this volume for
|
207 | 58793040 | Santi Raffa | short lived operations like so::
|
208 | 58793040 | Santi Raffa |
|
209 | 58793040 | Santi Raffa | with volume.mount():
|
210 | 58793040 | Santi Raffa | # Do operations on volume
|
211 | 58793040 | Santi Raffa | # Volume is now unmounted
|
212 | 58793040 | Santi Raffa |
|
213 | 58793040 | Santi Raffa | """
|
214 | 58793040 | Santi Raffa | |
215 | 58793040 | Santi Raffa | class _GlusterVolumeContextManager(object): |
216 | 58793040 | Santi Raffa | |
217 | 58793040 | Santi Raffa | def __init__(self, volume): |
218 | 58793040 | Santi Raffa | self.volume = volume
|
219 | 58793040 | Santi Raffa | |
220 | 58793040 | Santi Raffa | def __enter__(self): |
221 | 58793040 | Santi Raffa | # We're already mounted.
|
222 | 58793040 | Santi Raffa | return self |
223 | 58793040 | Santi Raffa | |
224 | 58793040 | Santi Raffa | def __exit__(self, *exception_information): |
225 | 58793040 | Santi Raffa | self.volume.Unmount()
|
226 | 58793040 | Santi Raffa | return False # do not swallow exceptions. |
227 | 58793040 | Santi Raffa | |
228 | 58793040 | Santi Raffa | if self._IsMounted(): |
229 | 58793040 | Santi Raffa | return _GlusterVolumeContextManager(self) |
230 | 58793040 | Santi Raffa | |
231 | 58793040 | Santi Raffa | command = ["mount",
|
232 | 58793040 | Santi Raffa | "-t", "glusterfs", |
233 | 58793040 | Santi Raffa | self._GetFUSEMountString(),
|
234 | 58793040 | Santi Raffa | self.mount_point]
|
235 | 58793040 | Santi Raffa | |
236 | 58793040 | Santi Raffa | io.Makedirs(self.mount_point)
|
237 | 58793040 | Santi Raffa | self._run_cmd(" ".join(command), |
238 | 58793040 | Santi Raffa | # Why set cwd? Because it's an area we control. If,
|
239 | 58793040 | Santi Raffa | # for some unfortunate reason, this folder exists:
|
240 | 58793040 | Santi Raffa | # "/%s/" % _GetFUSEMountString()
|
241 | 58793040 | Santi Raffa | # ...then the gluster parser gets confused and treats
|
242 | 58793040 | Santi Raffa | # _GetFUSEMountString() as your mount point and
|
243 | 58793040 | Santi Raffa | # self.mount_point becomes a syntax error.
|
244 | 58793040 | Santi Raffa | cwd=self.mount_point)
|
245 | 58793040 | Santi Raffa | |
246 | 58793040 | Santi Raffa | # mount.glusterfs exits with code 0 even after failure.
|
247 | 58793040 | Santi Raffa | # https://bugzilla.redhat.com/show_bug.cgi?id=1031973
|
248 | 58793040 | Santi Raffa | if not self._IsMounted(): |
249 | 58793040 | Santi Raffa | reasons = self._GuessMountFailReasons()
|
250 | 58793040 | Santi Raffa | if not reasons: |
251 | 58793040 | Santi Raffa | reasons = "%r failed." % (" ".join(command)) |
252 | 58793040 | Santi Raffa | base.ThrowError("%r: mount failure: %s",
|
253 | 58793040 | Santi Raffa | self.mount_point,
|
254 | 58793040 | Santi Raffa | reasons) |
255 | 58793040 | Santi Raffa | |
256 | 58793040 | Santi Raffa | return _GlusterVolumeContextManager(self) |
257 | 58793040 | Santi Raffa | |
258 | 58793040 | Santi Raffa | def Unmount(self): |
259 | 58793040 | Santi Raffa | """Try and unmount the volume.
|
260 | 58793040 | Santi Raffa |
|
261 | 58793040 | Santi Raffa | Failures are logged but otherwise ignored.
|
262 | 58793040 | Santi Raffa |
|
263 | 58793040 | Santi Raffa | @raises BlockDeviceError: if the volume was not mounted to begin with.
|
264 | 58793040 | Santi Raffa | """
|
265 | 58793040 | Santi Raffa | |
266 | 58793040 | Santi Raffa | if not self._IsMounted(): |
267 | 58793040 | Santi Raffa | base.ThrowError("%r: should be mounted but isn't.", self.mount_point) |
268 | 58793040 | Santi Raffa | |
269 | 58793040 | Santi Raffa | result = self._run_cmd(["umount", |
270 | 58793040 | Santi Raffa | self.mount_point])
|
271 | 58793040 | Santi Raffa | |
272 | 58793040 | Santi Raffa | if result.failed:
|
273 | 58793040 | Santi Raffa | logging.warning("Failed to unmount %r from %r: %s",
|
274 | 58793040 | Santi Raffa | self, self.mount_point, result.fail_reason) |
275 | 58793040 | Santi Raffa | |
276 | 58793040 | Santi Raffa | |
277 | 8106dd64 | Santi Raffa | class GlusterStorage(base.BlockDev): |
278 | 8106dd64 | Santi Raffa | """File device using the Gluster backend.
|
279 | 8106dd64 | Santi Raffa |
|
280 | 8106dd64 | Santi Raffa | This class represents a file storage backend device stored on Gluster. The
|
281 | 8106dd64 | Santi Raffa | system administrator must mount the Gluster device himself at boot time before
|
282 | 8106dd64 | Santi Raffa | Ganeti is run.
|
283 | 8106dd64 | Santi Raffa |
|
284 | 8106dd64 | Santi Raffa | The unique_id for the file device is a (file_driver, file_path) tuple.
|
285 | 8106dd64 | Santi Raffa |
|
286 | 8106dd64 | Santi Raffa | """
|
287 | 8106dd64 | Santi Raffa | def __init__(self, unique_id, children, size, params, dyn_params): |
288 | 8106dd64 | Santi Raffa | """Initalizes a file device backend.
|
289 | 8106dd64 | Santi Raffa |
|
290 | 8106dd64 | Santi Raffa | """
|
291 | 8106dd64 | Santi Raffa | if children:
|
292 | 8106dd64 | Santi Raffa | base.ThrowError("Invalid setup for file device")
|
293 | 8106dd64 | Santi Raffa | super(GlusterStorage, self).__init__(unique_id, children, size, params, |
294 | 8106dd64 | Santi Raffa | dyn_params) |
295 | 8106dd64 | Santi Raffa | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
296 | 8106dd64 | Santi Raffa | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
297 | 8106dd64 | Santi Raffa | self.driver = unique_id[0] |
298 | 8106dd64 | Santi Raffa | self.dev_path = unique_id[1] |
299 | 8106dd64 | Santi Raffa | |
300 | 8106dd64 | Santi Raffa | self.file = FileDeviceHelper(self.dev_path) |
301 | 8106dd64 | Santi Raffa | |
302 | 8106dd64 | Santi Raffa | self.Attach()
|
303 | 8106dd64 | Santi Raffa | |
304 | 8106dd64 | Santi Raffa | def Assemble(self): |
305 | 8106dd64 | Santi Raffa | """Assemble the device.
|
306 | 8106dd64 | Santi Raffa |
|
307 | 8106dd64 | Santi Raffa | Checks whether the file device exists, raises BlockDeviceError otherwise.
|
308 | 8106dd64 | Santi Raffa |
|
309 | 8106dd64 | Santi Raffa | """
|
310 | 8106dd64 | Santi Raffa | assert self.attached, "Gluster file assembled without being attached" |
311 | 8106dd64 | Santi Raffa | self.file.Exists(assert_exists=True) |
312 | 8106dd64 | Santi Raffa | |
313 | 8106dd64 | Santi Raffa | def Shutdown(self): |
314 | 8106dd64 | Santi Raffa | """Shutdown the device.
|
315 | 8106dd64 | Santi Raffa |
|
316 | 8106dd64 | Santi Raffa | """
|
317 | 8106dd64 | Santi Raffa | |
318 | 8106dd64 | Santi Raffa | self.file = None |
319 | 8106dd64 | Santi Raffa | self.dev_path = None |
320 | 8106dd64 | Santi Raffa | self.attached = False |
321 | 8106dd64 | Santi Raffa | |
322 | 8106dd64 | Santi Raffa | def Open(self, force=False): |
323 | 8106dd64 | Santi Raffa | """Make the device ready for I/O.
|
324 | 8106dd64 | Santi Raffa |
|
325 | 8106dd64 | Santi Raffa | This is a no-op for the file type.
|
326 | 8106dd64 | Santi Raffa |
|
327 | 8106dd64 | Santi Raffa | """
|
328 | 8106dd64 | Santi Raffa | assert self.attached, "Gluster file opened without being attached" |
329 | 8106dd64 | Santi Raffa | |
330 | 8106dd64 | Santi Raffa | def Close(self): |
331 | 8106dd64 | Santi Raffa | """Notifies that the device will no longer be used for I/O.
|
332 | 8106dd64 | Santi Raffa |
|
333 | 8106dd64 | Santi Raffa | This is a no-op for the file type.
|
334 | 8106dd64 | Santi Raffa | """
|
335 | 8106dd64 | Santi Raffa | pass
|
336 | 8106dd64 | Santi Raffa | |
337 | 8106dd64 | Santi Raffa | def Remove(self): |
338 | 8106dd64 | Santi Raffa | """Remove the file backing the block device.
|
339 | 8106dd64 | Santi Raffa |
|
340 | 8106dd64 | Santi Raffa | @rtype: boolean
|
341 | 8106dd64 | Santi Raffa | @return: True if the removal was successful
|
342 | 8106dd64 | Santi Raffa |
|
343 | 8106dd64 | Santi Raffa | """
|
344 | 8106dd64 | Santi Raffa | return self.file.Remove() |
345 | 8106dd64 | Santi Raffa | |
346 | 8106dd64 | Santi Raffa | def Rename(self, new_id): |
347 | 8106dd64 | Santi Raffa | """Renames the file.
|
348 | 8106dd64 | Santi Raffa |
|
349 | 8106dd64 | Santi Raffa | """
|
350 | 8106dd64 | Santi Raffa | # TODO: implement rename for file-based storage
|
351 | 8106dd64 | Santi Raffa | base.ThrowError("Rename is not supported for Gluster storage")
|
352 | 8106dd64 | Santi Raffa | |
353 | 8106dd64 | Santi Raffa | def Grow(self, amount, dryrun, backingstore, excl_stor): |
354 | 8106dd64 | Santi Raffa | """Grow the file
|
355 | 8106dd64 | Santi Raffa |
|
356 | 8106dd64 | Santi Raffa | @param amount: the amount (in mebibytes) to grow with
|
357 | 8106dd64 | Santi Raffa |
|
358 | 8106dd64 | Santi Raffa | """
|
359 | 8106dd64 | Santi Raffa | self.file.Grow(amount, dryrun, backingstore, excl_stor)
|
360 | 8106dd64 | Santi Raffa | |
361 | 8106dd64 | Santi Raffa | def Attach(self): |
362 | 8106dd64 | Santi Raffa | """Attach to an existing file.
|
363 | 8106dd64 | Santi Raffa |
|
364 | 8106dd64 | Santi Raffa | Check if this file already exists.
|
365 | 8106dd64 | Santi Raffa |
|
366 | 8106dd64 | Santi Raffa | @rtype: boolean
|
367 | 8106dd64 | Santi Raffa | @return: True if file exists
|
368 | 8106dd64 | Santi Raffa |
|
369 | 8106dd64 | Santi Raffa | """
|
370 | 8106dd64 | Santi Raffa | self.attached = self.file.Exists() |
371 | 8106dd64 | Santi Raffa | return self.attached |
372 | 8106dd64 | Santi Raffa | |
373 | 8106dd64 | Santi Raffa | def GetActualSize(self): |
374 | 8106dd64 | Santi Raffa | """Return the actual disk size.
|
375 | 8106dd64 | Santi Raffa |
|
376 | 8106dd64 | Santi Raffa | @note: the device needs to be active when this is called
|
377 | 8106dd64 | Santi Raffa |
|
378 | 8106dd64 | Santi Raffa | """
|
379 | 8106dd64 | Santi Raffa | return self.file.Size() |
380 | 8106dd64 | Santi Raffa | |
381 | 8106dd64 | Santi Raffa | @classmethod
|
382 | 8106dd64 | Santi Raffa | def Create(cls, unique_id, children, size, spindles, params, excl_stor, |
383 | 8106dd64 | Santi Raffa | dyn_params): |
384 | 8106dd64 | Santi Raffa | """Create a new file.
|
385 | 8106dd64 | Santi Raffa |
|
386 | 8106dd64 | Santi Raffa | @param size: the size of file in MiB
|
387 | 8106dd64 | Santi Raffa |
|
388 | 8106dd64 | Santi Raffa | @rtype: L{bdev.FileStorage}
|
389 | 8106dd64 | Santi Raffa | @return: an instance of FileStorage
|
390 | 8106dd64 | Santi Raffa |
|
391 | 8106dd64 | Santi Raffa | """
|
392 | 8106dd64 | Santi Raffa | if excl_stor:
|
393 | 8106dd64 | Santi Raffa | raise errors.ProgrammerError("FileStorage device requested with" |
394 | 8106dd64 | Santi Raffa | " exclusive_storage")
|
395 | 8106dd64 | Santi Raffa | if not isinstance(unique_id, (tuple, list)) or len(unique_id) != 2: |
396 | 8106dd64 | Santi Raffa | raise ValueError("Invalid configuration data %s" % str(unique_id)) |
397 | 8106dd64 | Santi Raffa | |
398 | 8106dd64 | Santi Raffa | dev_path = unique_id[1]
|
399 | 8106dd64 | Santi Raffa | |
400 | 8106dd64 | Santi Raffa | FileDeviceHelper.Create(dev_path, size) |
401 | 8106dd64 | Santi Raffa | return GlusterStorage(unique_id, children, size, params, dyn_params) |