[Linux-cluster] Patch: nodeid based cdpn for GFS shared root

[Jonathan E Brassow]

I've only heard in passing, but...

I think that there has been community push back on the cdpn's.  I don't 
think they want them in GFS 2.  It may be tough to argue that GFS 1 
needs more cdpn capability if it is completely going away in GFS 2.  
The reason sited against cdpn's was the fact that 'mount --bind' 
exists.  If you could articulate why bind mounts are insufficient for 
your uses, it may give the community a reason to take a second look at 
cdpn's.

  brassow

On Apr 20, 2006, at 3:03 AM, Mark Hlawatschek wrote:

> Hi,
>
> as posted before, we are using GFS for our diskless shared root cluster
> solutions.
>
> In this file system based ssi configurations all servers are 
> “stateless” and
> share the same root partition and boot device in the SAN. Server,
> infrastructure and storage tier of the diskless shared root cluster 
> can be
> scaled independently and incrementally.
>
> As we want to be independent from the servers hostnames at initrd 
> boottime, we
> wrote a small GFS patch to use cmans nodeid parameter for a context 
> dependent
> path name.
>
> I attached the patches to the mail. Note, that the GFS and cman 
> patches are
> totally independent from each other and the cman patch is only for user
> information.
>
> What do you think about nodeid cdpns ?
>
> The Readme:
> 1. Reason for the patch
> Create context dependent symbolic links (cdsl) dependent to cmans 
> nodeid
> E.g. ln -s @nodeid mynode
>
> 2. Contents
> - cman-kernel-nodeid.patch
> Applies against cman-kernel-2.6.9-41
> - kernel-nodeid-symlink.patch
> Applies against gfs-kernel-2.6.9-42
>
> 3. Changes:
> 3.1 cman-kernel
> Added line to proc/cluster/status output. E.g: "Node ID: 4"
> 3.2 gfs-kernel
> Added new parameter for cdsl symlink: @nodeid
>
> Thanks,
>
> Mark
>
>
> -- 
> Gruss / Regards,
>
> Dipl.-Ing. Mark Hlawatschek
> Phone: +49-89 121 409-55
> http://www.atix.de/
> http://www.open-sharedroot.org/
>
> **
> ATIX - Ges. fuer Informationstechnologie und Consulting mbH
> Einsteinstr. 10 - 85716 Unterschleissheim - Germany
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