ceph/src/mount.fuse.ceph

   1 #!/usr/bin/env python
   2 '''
   3 Helper to mount ceph-fuse from /etc/fstab.  To use, add an entry
   4 like:
   5
   6 DEVICE  PATH       TYPE        OPTIONS
   7 none    /mnt/ceph  fuse.ceph   ceph.id=admin,_netdev,defaults  0 0
   8 none    /mnt/ceph  fuse.ceph   ceph.name=client.admin,_netdev,defaults  0 0
   9 none    /mnt/ceph  fuse.ceph   ceph.id=myuser,ceph.conf=/etc/ceph/foo.conf,_netdev,defaults  0 0
  10
  11 ceph-fuse options are specified in the fs_mntops(4) column and must begin
  12 with 'ceph.' prefix. This way ceph related fs options will be passed to
  13 ceph-fuse and others will be ignored by ceph-fuse.
  14 First two examples above, for example, speficy that ceph-fuse will authenticate
  15 as client.admin. Third example specify, that ceph-fuse will authenticate as
  16 client.myuser and also sets 'conf' option to '/etc/ceph/foo.conf' via ceph-fuse
  17 command line.
  18 Any valid ceph-fuse options can be passed this way.
  19
  20 NOTE:
  21 Old format is also supported
  22
  23 DEVICE                             PATH        TYPE        OPTIONS
  24 id=admin                           /mnt/ceph   fuse.ceph   defaults   0 0
  25 id=myuser,conf=/etc/ceph/foo.conf  /mnt/ceph   fuse.ceph   defaults   0 0
  26 '''
  27
  28 import sys
  29 import argparse
  30 from subprocess import Popen
  31
  32 def ceph_options(mntops):
  33     ceph_opts = [o for o in mntops if o.startswith('ceph.')]
  34     return ceph_opts
  35
  36 def ceph_options_compat(device):
  37     return [ 'ceph.' + opt for opt in device.split(',') ]
  38
  39 def fs_options(opts, ceph_opts):
  40     # strip out noauto and _netdev options; libfuse doesn't like it
  41     strip_opts = ['defaults', 'noauto', '_netdev']
  42     return ','.join(list(set(opts) - set(ceph_opts) - set(strip_opts)))
  43
  44 def main(arguments):
  45     parser = argparse.ArgumentParser(description=__doc__,
  46                                      formatter_class=argparse.RawDescriptionHelpFormatter)
  47     parser.add_argument('device', type=str, nargs='+',
  48                         help='Device')
  49     parser.add_argument('mountpoint', type=str, nargs='+',
  50                         help='Mount point')
  51     parser.add_argument('-o', dest='options', type=str, nargs='+',
  52                         help='Filesystem options')
  53     args = parser.parse_known_args(arguments)[0]
  54
  55     device = args.device[0]
  56     mountpoint = args.mountpoint[0]
  57     options = ''.join(args.options).split(',')
  58
  59     if '=' in device:
  60         ceph_opts = ceph_options_compat(device)
  61     else:
  62         ceph_opts = ceph_options(options)
  63
  64     fs_opts = fs_options(options, ceph_opts)
  65     ceph_opts = ' '.join(['--' + o.replace('ceph.', '', 1) for o in ceph_opts])
  66
  67     command = 'ceph-fuse %s %s' % (ceph_opts, mountpoint)
  68
  69     if fs_opts:
  70         command += ' -o %s' % (fs_opts)
  71
  72     mount_cmd = Popen(command, shell=True)
  73     mount_cmd.communicate()
  74
  75     if (mount_cmd.returncode != 0):
  76         print("Mount failed with status code: {}".format(mount_cmd.returncode))
  77
  78 if __name__ == '__main__':
  79     sys.exit(main(sys.argv[1:]))