13 import arvados.commands._util as arv_cmd
14 from arvados_fuse import crunchstat
15 from arvados_fuse import *
16 from arvados_fuse._version import __version__
18 class ArgumentParser(argparse.ArgumentParser):
20 super(ArgumentParser, self).__init__(
21 parents=[arv_cmd.retry_opt],
22 description='''Mount Keep data under the local filesystem. Default mode is --home''',
24 Note: When using the --exec feature, you must either specify the
25 mountpoint before --exec, or mark the end of your --exec arguments
28 self.add_argument('--version', action='version',
29 version="%s %s" % (sys.argv[0], __version__),
30 help='Print version and exit.')
31 self.add_argument('mountpoint', type=str, help="""Mount point.""")
32 self.add_argument('--allow-other', action='store_true',
33 help="""Let other users read the mount""")
35 mode = self.add_mutually_exclusive_group()
37 mode.add_argument('--all', action='store_const', const='all', dest='mode',
38 help="""Mount a subdirectory for each mode: home, shared, by_tag, by_id (default if no --mount-* arguments are given).""")
39 mode.add_argument('--custom', action='store_const', const=None, dest='mode',
40 help="""Mount a top level meta-directory with subdirectories as specified by additional --mount-* arguments (default if any --mount-* arguments are given).""")
41 mode.add_argument('--home', action='store_const', const='home', dest='mode',
42 help="""Mount only the user's home project.""")
43 mode.add_argument('--shared', action='store_const', const='shared', dest='mode',
44 help="""Mount only list of projects shared with the user.""")
45 mode.add_argument('--by-tag', action='store_const', const='by_tag', dest='mode',
46 help="""Mount subdirectories listed by tag.""")
47 mode.add_argument('--by-id', action='store_const', const='by_id', dest='mode',
48 help="""Mount subdirectories listed by portable data hash or uuid.""")
49 mode.add_argument('--by-pdh', action='store_const', const='by_pdh', dest='mode',
50 help="""Mount subdirectories listed by portable data hash.""")
51 mode.add_argument('--project', type=str, metavar='UUID',
52 help="""Mount the specified project.""")
53 mode.add_argument('--collection', type=str, metavar='UUID_or_PDH',
54 help="""Mount only the specified collection.""")
56 mounts = self.add_argument_group('Custom mount options')
57 mounts.add_argument('--mount-by-pdh',
58 type=str, metavar='PATH', action='append', default=[],
59 help="Mount each readable collection at mountpoint/PATH/P where P is the collection's portable data hash.")
60 mounts.add_argument('--mount-by-id',
61 type=str, metavar='PATH', action='append', default=[],
62 help="Mount each readable collection at mountpoint/PATH/UUID and mountpoint/PATH/PDH where PDH is the collection's portable data hash and UUID is its UUID.")
63 mounts.add_argument('--mount-by-tag',
64 type=str, metavar='PATH', action='append', default=[],
65 help="Mount all collections with tag TAG at mountpoint/PATH/TAG/UUID.")
66 mounts.add_argument('--mount-home',
67 type=str, metavar='PATH', action='append', default=[],
68 help="Mount the current user's home project at mountpoint/PATH.")
69 mounts.add_argument('--mount-shared',
70 type=str, metavar='PATH', action='append', default=[],
71 help="Mount projects shared with the current user at mountpoint/PATH.")
72 mounts.add_argument('--mount-tmp',
73 type=str, metavar='PATH', action='append', default=[],
74 help="Create a new collection, mount it in read/write mode at mountpoint/PATH, and delete it when unmounting.")
76 self.add_argument('--debug', action='store_true', help="""Debug mode""")
77 self.add_argument('--logfile', help="""Write debug logs and errors to the specified file (default stderr).""")
78 self.add_argument('--foreground', action='store_true', help="""Run in foreground (default is to daemonize unless --exec specified)""", default=False)
79 self.add_argument('--encoding', type=str, help="Character encoding to use for filesystem, default is utf-8 (see Python codec registry for list of available encodings)", default="utf-8")
81 self.add_argument('--file-cache', type=int, help="File data cache size, in bytes (default 256MiB)", default=256*1024*1024)
82 self.add_argument('--directory-cache', type=int, help="Directory data cache size, in bytes (default 128MiB)", default=128*1024*1024)
84 self.add_argument('--disable-event-listening', action='store_true', help="Don't subscribe to events on the API server", dest="disable_event_listening", default=False)
86 self.add_argument('--read-only', action='store_false', help="Mount will be read only (default)", dest="enable_write", default=False)
87 self.add_argument('--read-write', action='store_true', help="Mount will be read-write", dest="enable_write", default=False)
89 self.add_argument('--crunchstat-interval', type=float, help="Write stats to stderr every N seconds (default disabled)", default=0)
91 self.add_argument('--unmount-timeout',
92 type=float, default=2.0,
93 help="Time to wait for graceful shutdown after --exec program exits and filesystem is unmounted")
95 self.add_argument('--exec', type=str, nargs=argparse.REMAINDER,
96 dest="exec_args", metavar=('command', 'args', '...', '--'),
97 help="""Mount, run a command, then unmount and exit""")
101 def __init__(self, args, logger=logging.getLogger('arvados.arv-mount')):
104 self.listen_for_events = False
106 self.args.mountpoint = os.path.realpath(self.args.mountpoint)
107 if self.args.logfile:
108 self.args.logfile = os.path.realpath(self.args.logfile)
111 self._setup_logging()
114 except Exception as e:
115 self.logger.exception("arv-mount: exception during setup: %s", e)
119 llfuse.init(self.operations, self.args.mountpoint, self._fuse_options())
120 if self.listen_for_events and not self.args.disable_event_listening:
121 self.operations.listen_for_events()
122 self.llfuse_thread = threading.Thread(None, lambda: self._llfuse_main())
123 self.llfuse_thread.daemon = True
124 self.llfuse_thread.start()
125 self.operations.initlock.wait()
128 def __exit__(self, exc_type, exc_value, traceback):
129 if self.operations.events:
130 self.operations.events.close(timeout=self.args.unmount_timeout)
131 subprocess.call(["fusermount", "-u", "-z", self.args.mountpoint])
132 self.llfuse_thread.join(timeout=self.args.unmount_timeout)
133 if self.llfuse_thread.is_alive():
134 self.logger.warning("Mount.__exit__:"
135 " llfuse thread still alive %fs after umount"
136 " -- abandoning and exiting anyway",
137 self.args.unmount_timeout)
140 if self.args.exec_args:
143 self._run_standalone()
145 def _fuse_options(self):
146 """FUSE mount options; see mount.fuse(8)"""
147 opts = [optname for optname in ['allow_other', 'debug']
148 if getattr(self.args, optname)]
149 # Increase default read/write size from 4KiB to 128KiB
150 opts += ["big_writes", "max_read=131072"]
153 def _setup_logging(self):
154 # Configure a log handler based on command-line switches.
155 if self.args.logfile:
156 log_handler = logging.FileHandler(self.args.logfile)
160 if log_handler is not None:
161 arvados.logger.removeHandler(arvados.log_handler)
162 arvados.logger.addHandler(log_handler)
165 arvados.logger.setLevel(logging.DEBUG)
166 self.logger.debug("arv-mount debugging enabled")
168 self.logger.info("enable write is %s", self.args.enable_write)
170 def _setup_api(self):
171 self.api = arvados.safeapi.ThreadSafeApiCache(
172 apiconfig=arvados.config.settings(),
174 'block_cache': arvados.keep.KeepBlockCache(self.args.file_cache),
175 'num_retries': self.args.retries,
177 # Do a sanity check that we have a working arvados host + token.
178 self.api.users().current().execute()
180 def _setup_mount(self):
181 self.operations = Operations(
185 encoding=self.args.encoding,
186 inode_cache=InodeCache(cap=self.args.directory_cache),
187 enable_write=self.args.enable_write)
189 if self.args.crunchstat_interval:
190 statsthread = threading.Thread(
191 target=crunchstat.statlogger,
192 args=(self.args.crunchstat_interval,
195 statsthread.daemon = True
198 usr = self.api.users().current().execute(num_retries=self.args.retries)
201 dir_args = [llfuse.ROOT_INODE, self.operations.inodes, self.api, self.args.retries]
204 if self.args.collection is not None:
205 # Set up the request handler with the collection at the root
206 # First check that the collection is readable
207 self.api.collections().get(uuid=self.args.collection).execute()
208 self.args.mode = 'collection'
209 dir_class = CollectionDirectory
210 dir_args.append(self.args.collection)
211 elif self.args.project is not None:
212 self.args.mode = 'project'
213 dir_class = ProjectDirectory
215 self.api.groups().get(uuid=self.args.project).execute(
216 num_retries=self.args.retries))
218 if (self.args.mount_by_id or
219 self.args.mount_by_pdh or
220 self.args.mount_by_tag or
221 self.args.mount_home or
222 self.args.mount_shared or
223 self.args.mount_tmp):
224 if self.args.mode is not None:
226 "Cannot combine '{}' mode with custom --mount-* options.".
227 format(self.args.mode))
228 elif self.args.mode is None:
229 # If no --mount-custom or custom mount args, --all is the default
230 self.args.mode = 'all'
232 if self.args.mode in ['by_id', 'by_pdh']:
233 # Set up the request handler with the 'magic directory' at the root
234 dir_class = MagicDirectory
235 dir_args.append(self.args.mode == 'by_pdh')
236 elif self.args.mode == 'by_tag':
237 dir_class = TagsDirectory
238 elif self.args.mode == 'shared':
239 dir_class = SharedDirectory
241 elif self.args.mode == 'home':
242 dir_class = ProjectDirectory
244 dir_args.append(True)
245 elif self.args.mode == 'all':
246 self.args.mount_by_id = ['by_id']
247 self.args.mount_by_tag = ['by_tag']
248 self.args.mount_home = ['home']
249 self.args.mount_shared = ['shared']
252 if dir_class is not None:
253 ent = dir_class(*dir_args)
254 self.operations.inodes.add_entry(ent)
255 self.listen_for_events = ent.want_event_subscribe()
258 e = self.operations.inodes.add_entry(Directory(
259 llfuse.ROOT_INODE, self.operations.inodes))
260 dir_args[0] = e.inode
262 for name in self.args.mount_by_id:
263 self._add_mount(e, name, MagicDirectory(*dir_args, pdh_only=False))
264 for name in self.args.mount_by_pdh:
265 self._add_mount(e, name, MagicDirectory(*dir_args, pdh_only=True))
266 for name in self.args.mount_by_tag:
267 self._add_mount(e, name, TagsDirectory(*dir_args))
268 for name in self.args.mount_home:
269 self._add_mount(e, name, ProjectDirectory(*dir_args, project_object=usr, poll=True))
270 for name in self.args.mount_shared:
271 self._add_mount(e, name, SharedDirectory(*dir_args, exclude=usr, poll=True))
272 for name in self.args.mount_tmp:
273 self._add_mount(e, name, TmpCollectionDirectory(*dir_args))
276 text = self._readme_text(
277 arvados.config.get('ARVADOS_API_HOST'),
279 self._add_mount(e, 'README', StringFile(e.inode, text, now))
281 def _add_mount(self, tld, name, ent):
282 if name in ['', '.', '..'] or '/' in name:
283 sys.exit("Mount point '{}' is not supported.".format(name))
284 tld._entries[name] = self.operations.inodes.add_entry(ent)
285 self.listen_for_events = (self.listen_for_events or ent.want_event_subscribe())
287 def _readme_text(self, api_host, user_email):
289 Welcome to Arvados! This directory provides file system access to
290 files and objects available on the Arvados installation located at
291 '{}' using credentials for user '{}'.
293 From here, the following directories are available:
295 by_id/ Access to Keep collections by uuid or portable data hash (see by_id/README for details).
296 by_tag/ Access to Keep collections organized by tag.
297 home/ The contents of your home project.
298 shared/ Projects shared with you.
300 '''.format(api_host, user_email)
306 sp = subprocess.Popen(self.args.exec_args, shell=False)
308 # forward signals to the process.
309 signal.signal(signal.SIGINT, lambda signum, frame: sp.send_signal(signum))
310 signal.signal(signal.SIGTERM, lambda signum, frame: sp.send_signal(signum))
311 signal.signal(signal.SIGQUIT, lambda signum, frame: sp.send_signal(signum))
313 # wait for process to complete.
316 # restore default signal handlers.
317 signal.signal(signal.SIGINT, signal.SIG_DFL)
318 signal.signal(signal.SIGTERM, signal.SIG_DFL)
319 signal.signal(signal.SIGQUIT, signal.SIG_DFL)
320 except Exception as e:
321 self.logger.exception(
322 'arv-mount: exception during exec %s', self.args.exec_args)
325 except AttributeError:
329 def _run_standalone(self):
331 llfuse.init(self.operations, self.args.mountpoint, self._fuse_options())
333 if not self.args.foreground:
334 self.daemon_ctx = daemon.DaemonContext(
335 working_directory=os.path.dirname(self.args.mountpoint),
336 files_preserve=range(
337 3, resource.getrlimit(resource.RLIMIT_NOFILE)[1]))
338 self.daemon_ctx.open()
340 # Subscribe to change events from API server
341 if self.listen_for_events and not self.args.disable_event_listening:
342 self.operations.listen_for_events()
345 except Exception as e:
346 self.logger.exception('arv-mount: exception during mount: %s', e)
347 exit(getattr(e, 'errno', 1))
350 def _llfuse_main(self):
354 llfuse.close(unmount=False)