Re: rbd-nbd: list-mapped : is it possible to display associtation between rbd volume and nbd device ?

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I have find a way, nbd device store the pid of the running rbd-ndb process,
so:


#cat /sys/block/nbd0/pid 
18963
#cat /proc/18963/cmdline 
rbd-nbd map pool/testimage




----- Mail original -----
De: "Jason Dillaman" <jdillama@xxxxxxxxxx>
À: "aderumier" <aderumier@xxxxxxxxx>
Cc: "ceph-users" <ceph-users@xxxxxxxxxxxxxx>
Envoyé: Mardi 23 Août 2016 16:30:38
Objet: Re:  rbd-nbd: list-mapped : is it possible to display associtation between rbd volume and nbd device ?

I don't think this is something that could be trivially added. The 
nbd protocol doesn't really support associating metadata with the 
device. Right now, that "list-mapped" command just tests each nbd 
device to see if it is connected to any backing server (not just 
rbd-nbd backed devices). 

On Tue, Aug 23, 2016 at 5:28 AM, Alexandre DERUMIER <aderumier@xxxxxxxxx> wrote: 
> Hi, I'm currently testing rbd-nbd, to implement them in lxc instead krbd (to support new rbd features ) 
> 
> 
> #rbd-nbd map pool/testimage 
> /dev/nbd0 
> #rbd-nbd list-mapped 
> /dev/nbd0 
> 
> 
> Is is possible to implement something like 
> 
> #rbd-nbd list-mapped 
> /dev/nbd0 pool/testimage 
> 
> 
> Regards, 
> 
> Alexandre 
> _______________________________________________ 
> ceph-users mailing list 
> ceph-users@xxxxxxxxxxxxxx 
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com 



-- 
Jason 

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