12 import arvados.commands._util as arv_cmd
13 from arvados_fuse import *
15 logger = logging.getLogger('arvados.arv-mount')
17 if __name__ == '__main__':
18 # Handle command line parameters
19 parser = argparse.ArgumentParser(
20 parents=[arv_cmd.retry_opt],
21 description='''Mount Keep data under the local filesystem. Default mode is --home''',
23 Note: When using the --exec feature, you must either specify the
24 mountpoint before --exec, or mark the end of your --exec arguments
27 parser.add_argument('mountpoint', type=str, help="""Mount point.""")
28 parser.add_argument('--allow-other', action='store_true',
29 help="""Let other users read the mount""")
31 mount_mode = parser.add_mutually_exclusive_group()
33 mount_mode.add_argument('--all', action='store_true', help="""Mount a subdirectory for each mode: home, shared, by_tag, by_id (default).""")
34 mount_mode.add_argument('--home', action='store_true', help="""Mount only the user's home project.""")
35 mount_mode.add_argument('--shared', action='store_true', help="""Mount only list of projects shared with the user.""")
36 mount_mode.add_argument('--by-tag', action='store_true',
37 help="""Mount subdirectories listed by tag.""")
38 mount_mode.add_argument('--by-id', action='store_true',
39 help="""Mount subdirectories listed by portable data hash or uuid.""")
40 mount_mode.add_argument('--project', type=str, help="""Mount a specific project.""")
41 mount_mode.add_argument('--collection', type=str, help="""Mount only the specified collection.""")
43 parser.add_argument('--debug', action='store_true', help="""Debug mode""")
44 parser.add_argument('--logfile', help="""Write debug logs and errors to the specified file (default stderr).""")
45 parser.add_argument('--foreground', action='store_true', help="""Run in foreground (default is to daemonize unless --exec specified)""", default=False)
46 parser.add_argument('--exec', type=str, nargs=argparse.REMAINDER,
47 dest="exec_args", metavar=('command', 'args', '...', '--'),
48 help="""Mount, run a command, then unmount and exit""")
50 args = parser.parse_args()
51 args.mountpoint = os.path.realpath(args.mountpoint)
53 args.logfile = os.path.realpath(args.logfile)
55 # Daemonize as early as possible, so we don't accidentally close
56 # file descriptors we're using.
57 if not (args.exec_args or args.foreground):
58 os.chdir(args.mountpoint)
59 daemon_ctx = daemon.DaemonContext(working_directory='.')
64 # Configure a log handler based on command-line switches.
66 log_handler = logging.FileHandler(args.logfile)
68 log_handler = logging.NullHandler()
72 if log_handler is not None:
73 arvados.logger.removeHandler(arvados.log_handler)
74 arvados.logger.addHandler(log_handler)
77 arvados.logger.setLevel(logging.DEBUG)
78 logger.debug("arv-mount debugging enabled")
81 # Create the request handler
82 operations = Operations(os.getuid(), os.getgid())
83 api = SafeApi(arvados.config)
85 usr = api.users().current().execute(num_retries=args.retries)
88 dir_args = [llfuse.ROOT_INODE, operations.inodes, api, args.retries]
90 # Set up the request handler with the 'magic directory' at the root
91 dir_class = MagicDirectory
93 dir_class = TagsDirectory
95 dir_class = SharedDirectory
98 dir_class = ProjectDirectory
100 elif args.collection is not None:
101 # Set up the request handler with the collection at the root
102 dir_class = CollectionDirectory
103 dir_args.append(args.collection)
104 elif args.project is not None:
105 dir_class = ProjectDirectory
106 dir_args.append(api.groups().get(uuid=args.project).execute(
107 num_retries=args.retries))
109 if dir_class is not None:
110 operations.inodes.add_entry(dir_class(*dir_args))
112 e = operations.inodes.add_entry(Directory(llfuse.ROOT_INODE))
113 dir_args[0] = e.inode
115 e._entries['by_id'] = operations.inodes.add_entry(MagicDirectory(*dir_args))
116 e._entries['by_tag'] = operations.inodes.add_entry(TagsDirectory(*dir_args))
119 e._entries['home'] = operations.inodes.add_entry(ProjectDirectory(*dir_args))
120 e._entries['shared'] = operations.inodes.add_entry(SharedDirectory(*dir_args))
123 Welcome to Arvados! This directory provides file system access to files and objects
124 available on the Arvados installation located at '{}'
125 using credentials for user '{}'.
127 From here, the following directories are available:
129 by_id/ Access to Keep collections by uuid or portable data hash (see by_id/README for details).
130 by_tag/ Access to Keep collections organized by tag.
131 home/ The contents of your home project.
132 shared/ Projects shared with you.
133 '''.format(arvados.config.get('ARVADOS_API_HOST'), usr['email'])
135 e._entries["README"] = operations.inodes.add_entry(StringFile(e.inode, text, now))
139 logger.exception("arv-mount: exception during API setup")
142 # FUSE options, see mount.fuse(8)
143 opts = [optname for optname in ['allow_other', 'debug']
144 if getattr(args, optname)]
147 # Initialize the fuse connection
148 llfuse.init(operations, args.mountpoint, opts)
150 t = threading.Thread(None, lambda: llfuse.main())
153 # wait until the driver is finished initializing
154 operations.initlock.wait()
158 sp = subprocess.Popen(args.exec_args, shell=False)
160 # forward signals to the process.
161 signal.signal(signal.SIGINT, lambda signum, frame: sp.send_signal(signum))
162 signal.signal(signal.SIGTERM, lambda signum, frame: sp.send_signal(signum))
163 signal.signal(signal.SIGQUIT, lambda signum, frame: sp.send_signal(signum))
165 # wait for process to complete.
168 # restore default signal handlers.
169 signal.signal(signal.SIGINT, signal.SIG_DFL)
170 signal.signal(signal.SIGTERM, signal.SIG_DFL)
171 signal.signal(signal.SIGQUIT, signal.SIG_DFL)
172 except Exception as e:
173 logger.exception('arv-mount: exception during exec %s',
177 except AttributeError:
180 subprocess.call(["fusermount", "-u", "-z", args.mountpoint])
185 llfuse.init(operations, args.mountpoint, opts)
187 except Exception as e:
188 logger.exception('arv-mount: exception during mount')
189 exit(getattr(e, 'errno', 1))