[DRBD-user] drbdmanage & dbus: object path contains invalid character

[Wolfgang Walkowiak]

Hi,

a small correction:  The system is actually running Debian stretch 
(stable).

Best wishes,

w.w.

On Tue, 29 May 2018, Wolfgang Walkowiak wrote:

>
> Dear developers of drbdmanage,
>
> we are running a Debian testing system with proxmox pve and use DRBD9 with 
> LVM thin volumes for replication of storage volumes between nodes.
>
> Using drbdmanaged we notice many messages occuring in the logfiles like,
> especially at the startup of the drbdmanaged, but also when certain commands 
> using drbdmanage are executed:
>
> drbdmanaged[38297]: ERROR      Signal creation failed, unhandled exception 
> encountered
>
> Obviously, the creation of the dbus signal doesn't succeed due to
> the hyphens in the storage container name.
>
> Looking a bit closer at drbdmanage/server.py, I modified the
> create_signal(...) method a little in order to print a bit more
> about the 'unhandled exception' (lines 1396 ff.):
>
>            except Exception as ex:
>                logging.error("Signal creation failed, "
>                              "unhandled exception encountered")
>                logging.error("Exception: %s" % str(ex))
>
>
> Et voila, the reason appears:
>
> drbdmanaged[38297]: ERROR      Signal creation failed, unhandled exception 
> encountered
> drbdmanaged[38297]: ERROR      Exception: Invalid object path 
> '/objects/assignments/monetbase2/vm-1801-disk-1': contains invalid character 
> '-'
>
> Looking at the dbus specifications at
> https://dbus.freedesktop.org/doc/dbus-specification.html
>
> we find that under Revision 0.32 of 2018-01-30:
>
> "* Deprecate hyphen/minus in bus names, with underscore as the recommended 
> replacement"
>
> Most likely my Debian testing is set up with a recent enough DBUS version for 
> this specification to already be implemented.  See below for the version 
> specification of some relevant packages.
>
> It would be great if the corresponding developers of drbdmanage could have a 
> look at this issue and propose a fix.
>
> Thank you and best wishes,
>
> w.w.
>
> ---
> Debian versions of relevant packages installed:
>
> dbus                                 1.10.26-0+deb9u1 libdbus-1-3:amd64 
> 1.10.26-0+deb9u1 libdbus-glib-1-2:amd64               0.108-2 
> libnet-dbus-perl 1.1.0-4+b1 python-dbus                          1.2.4-1+b1 
> drbdmanage-proxmox 2.1-1 python-drbdmanage                    0.99.17-1
>
>
> ==========================================================2018-05-29==21:09==
>
>  Dr. Wolfgang Walkowiak     Phone: +49-271-740-3889
>  Fakultaet IV / Physik      Fax  : +49-271-740-3886
>  Emmy Noether Campus
>  Universitaet Siegen    --> Wolfgang.Walkowiak at hep.physik.uni-siegen.de
>  Walter-Flex-Str. 3         Wolfgang.Walkowiak at gmx.net
>  57068 Siegen
>  Germany
>
> =============================================================================
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>
>

==========================================================2018-05-30==08:43==

   Dr. Wolfgang Walkowiak     Phone: +49-271-740-3889
   Fakultaet IV / Physik      Fax  : +49-271-740-3886
   Emmy Noether Campus
   Universitaet Siegen    --> Wolfgang.Walkowiak at hep.physik.uni-siegen.de
   Walter-Flex-Str. 3         Wolfgang.Walkowiak at gmx.net
   57068 Siegen
   Germany

=============================================================================