Re: [rdiff-backup-users] how to exclude mount point on destination,

[Andrew Ferguson]

On Jul 4, 2008, at 2:52 AM, lo73fr wrote:

> Hi,
>
> I try to do a rdiff-backup between to linux computer other SSH.
> The directory tree is following:
>
> source                                             dest
> /opt                                                    /opt
>  |                                                         |
>  |___ dir1                                             |---- Apache  
> (empty mount point)
>  |         |--- Some files                           |
>  |
>  |___ Apache (mount point)
>            |--- Some files
>
> My troubles is coming from the fact that "Apache" directory is a  
> mount point (both on source and destination tree) for another  
> filesystem.
>
> When I use the following rdiff-backup:
>
> rdiff-backup -v 5 --print-statistics --exclude-if-present apache -- 
> exclude-symbolic-links --force --exclude-other-filesystems -- 
> exclude /opt/apache /opt address@hidden::/opt
>
> rdiff-backup complains about "device or resource busy" on the  
> destination directory "/opt/apache".
> Sending back exception [Errno 16] Device or resource busy: '/opt/ 
> apache' of type <type 'exceptions.OSError'>:
>
> This is true, because destination "/opt/apache" is mount, so can't  
> delete it !
>
> I try many combination of exclude options on rdiff-backup, but can't  
> manage to remove this error.
>
> Any help would be apreciate.
>
>     Laurent


Hi Laurent,

Does this do what you want?

rdiff-backup -v 5 --print-statistics --exclude-symbolic-links -- 
exclude-other-filesystems /opt address@hidden::/opt


When you specify the "--exclude-if-present bad_file" option, it means  
that it should exclude any directories which contain a file named  
"bad_file". For example, this is commonly used as "--exclude-if- 
present .no_backup", which allows users to put a ".no_backup" file in  
any directories which they want excluded from the backup process.  
Based on what you are trying to accomplish, I don't think you want this.

When you specify the "--exclude /opt/apache" option, rdiff-backup will  
completely remove the "/opt/apache" directory from its view of the  
source. Thus, when it tries to mirror the source to the destination,  
it sees the "/opt/apache" directory on the destination, believes that  
it is not in the source, and thus tries to remove it. This causes the  
error that you report.

The "--exclude-other-filesystems" option should be enough to make  
rdiff-backup skip any files inside the mount point since it would  
detect that the files *under* /opt/apache/ are on a separate  
filesystem. Since the directory/mount-point /opt/apache is on the /opt  
filesystem, it is ok with it, and thus would not try to remove it from  
the destination.

Also, you almost certainly do NOT want to use the "--force" option.  
Rdiff-backup will tell you if it needs that option. If you use it  
without thinking about it, rdiff-backup will perform destructive  
operations without asking you.


Andrew