[rdiff-backup-users] rdiff-backup + chirp : symlinked_file problem

[Julien Poffet]

Hi,

I'm trying to use rdiff-backup to save some directories from a virtual machine to the host. (both guest and host run linux)

The idea is to run rdiff-backup within the virtual machine itself. I access the host filesystem by using chirp. The host run a chirp server to share a target backup directory. Then I mounted the host shared directory using chirp_fuse inside the virtual machine.
So the final situation is that the virtual machine has a remote directory mounted in /tmp which refers to the target backup directory inside the host. Now I want to backup my vm's directory to the directory in the host.

The mounted directory works well in both ways. All the permissions are set and I'm able to copy files and directories by using the cp command for instance.

When I want to launch my backup I type a simple rdiff-backup command which looks like that:

rdiff-backup -v5 /home/poffet/ /tmp/bck/131.243.51.142/

and I got the following error:

address@hidden bck]$ rdiff-backup -v5 /home/poffet/ /tmp/bck/131.243.51.142/
Using rdiff-backup version 1.2.2
Cannot change permissions on target directory.
Unable to import module xattr.
Extended attributes not supported on filesystem at /home/poffet
Unable to import module posix1e from pylibacl package.
POSIX ACLs not supported on filesystem at /home/poffet
Unable to import win32security module. Windows ACLs
not supported by filesystem at /home/poffet
escape_dos_devices not required by filesystem at /home/poffet
-----------------------------------------------------------------
Detected abilities for source (read only) file system:
  Access control lists                         Off
  Extended attributes                          Off
  Windows access control lists                 Off
  Case sensitivity                             On
  Escape DOS devices                           Off
  Mac OS X style resource forks                Off
  Mac OS X Finder information                  Off
-----------------------------------------------------------------
Warning: hard linking not supported by filesystem at /tmp/bck/131.243.51.142/rdiff-backup-data
Unable to import module xattr.
Extended attributes not supported on filesystem at /tmp/bck/131.243.51.142/rdiff-backup-data/rdiff-backup.tmp.0
Unable to import module posix1e from pylibacl package.
POSIX ACLs not supported on filesystem at /tmp/bck/131.243.51.142/rdiff-backup-data/rdiff-backup.tmp.0
Unable to import win32security module. Windows ACLs
not supported by filesystem at /tmp/bck/131.243.51.142/rdiff-backup-data/rdiff-backup.tmp.0
escape_dos_devices not required by filesystem at /tmp/bck/131.243.51.142/rdiff-backup-data/rdiff-backup.tmp.0
Exception '[Errno 13] Permission denied: '/tmp/bck/131.243.51.142/rdiff-backup-data/rdiff-backup.tmp.0/symlinked_file2'' raised of class 'exceptions.OSError':
  File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line 304, in error_check_Main
    try: Main(arglist)
  File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line 324, in Main
    take_action(rps)
  File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line 280, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line 334, in Backup
    rpout.conn.fs_abilities.backup_set_globals(rpin, force)
  File "/usr/lib/python2.4/site-packages/rdiff_backup/fs_abilities.py", line 830, in backup_set_globals
    dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir)
  File "/usr/lib/python2.4/site-packages/rdiff_backup/fs_abilities.py", line 165, in init_readwrite
    subdir.delete()
  File "/usr/lib/python2.4/site-packages/rdiff_backup/rpath.py", line 1054, in delete
    self.conn.shutil.rmtree(self.path)
  File "/usr/lib/python2.4/shutil.py", line 164, in rmtree
    onerror(os.remove, fullname, sys.exc_info())
  File "/usr/lib/python2.4/shutil.py", line 162, in rmtree
    os.remove(fullname)

Traceback (most recent call last):
  File "/usr/bin/rdiff-backup", line 30, in ?
    rdiff_backup.Main.error_check_Main(sys.argv[1:])
  File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line 304, in error_check_Main
    try: Main(arglist)
  File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line 324, in Main
    take_action(rps)
  File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line 280, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line 334, in Backup
    rpout.conn.fs_abilities.backup_set_globals(rpin, force)
  File "/usr/lib/python2.4/site-packages/rdiff_backup/fs_abilities.py", line 830, in backup_set_globals
    dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir)
  File "/usr/lib/python2.4/site-packages/rdiff_backup/fs_abilities.py", line 165, in init_readwrite
    subdir.delete()
  File "/usr/lib/python2.4/site-packages/rdiff_backup/rpath.py", line 1054, in delete
    self.conn.shutil.rmtree(self.path)
  File "/usr/lib/python2.4/shutil.py", line 164, in rmtree
    onerror(os.remove, fullname, sys.exc_info())
  File "/usr/lib/python2.4/shutil.py", line 162, in rmtree
    os.remove(fullname)
OSError: [Errno 13] Permission denied: '/tmp/bck/131.243.51.142/rdiff-backup-data/rdiff-backup.tmp.0/symlinked_file2'


However if I list the content of the target backup directory in the host I have the following result:

address@hidden:~/vml/backup$ ls -l rdiff-backup-data/rdiff-backup.tmp.0/
total 8
-rw------- 2 popei popei    0 2008-12-02 17:12 hardlinked_file1
drwx------ 2 popei popei 4096 2008-12-02 17:12 hl
lrwxrwxrwx 1 popei popei   72 2008-12-02 17:12 symlinked_file2 -> /bck/131.243.51.142/rdiff-backup-data/rdiff-backup.tmp.0/symlinked_file1

It seems that the symlinked_file2 is set to a wrong directory path. It should be /tmp/bck/131... and so on.

I have absolutely no clues on how to solve this issue and any help is more than welcome!

(I'm using rdiff-backup 1.2.2 and chirp 2.4.3 from cctools)

Julien