Re: [ceph-users] RBD mirroring between a IPv6 and IPv4 Cluster

2016-07-04 Thread Nick Fisk
> -Original Message-
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
> Wido den Hollander
> Sent: 04 July 2016 14:34
> To: ceph-users@lists.ceph.com; n...@fisk.me.uk
> Subject: Re: [ceph-users] RBD mirroring between a IPv6 and IPv4 Cluster
> 
> 
> > Op 4 juli 2016 om 9:25 schreef Nick Fisk :
> >
> >
> > Hi All,
> >
> > Quick question. I'm currently in the process of getting ready to
> > deploy a 2nd cluster, which at some point in the next 12 months, I
> > will want to enable RBD mirroring between the new and existing
> > clusters. I'm leaning towards deploying this new cluster with IPv6,
> > because Wido says so ;-)
> >
> 
> Good job! More IPv6 is better :)
> 
> > Question is, will RBD mirroring still be possible between the two? I
> > know you can't dual stack the core Ceph components, but does RBD
> > mirroring have the same limitations?
> >
> 
> I haven't touched it yet, but looking at the docs it seems it will:
> http://docs.ceph.com/docs/master/rbd/rbd-mirroring/
> 
> "The cluster name in the following examples corresponds to a Ceph
> configuration file of the same name (e.g. /etc/ceph/remote.conf). See the
> ceph-conf documentation for how to configure multiple clusters."
> 
> So, in 'remote.conf' you can add the IPv6 addresses of a cluster running
on
> IPv6 and on 'ceph.conf' the IPv4 addresses.
> 
> The rbd-mirror daemon will eventually talk to librbd/librados which will
act as
> a 'proxy' between the two clusters.
> 
> I think it works, but that's just based on reading the docs and prior
> knowledge.

Ok, thanks Wido. It won't be for a while that we have this all setup, but I
report back to confirm.

> 
> Wido
> 
> > Thanks,
> > Nick
> >
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Re: [ceph-users] RBD mirroring between a IPv6 and IPv4 Cluster

2016-07-04 Thread Wido den Hollander

> Op 4 juli 2016 om 9:25 schreef Nick Fisk :
> 
> 
> Hi All,
> 
> Quick question. I'm currently in the process of getting ready to deploy a
> 2nd cluster, which at some point in the next 12 months, I will want to
> enable RBD mirroring between the new and existing clusters. I'm leaning
> towards deploying this new cluster with IPv6, because Wido says so ;-) 
> 

Good job! More IPv6 is better :)

> Question is, will RBD mirroring still be possible between the two? I know
> you can't dual stack the core Ceph components, but does RBD mirroring have
> the same limitations?
> 

I haven't touched it yet, but looking at the docs it seems it will: 
http://docs.ceph.com/docs/master/rbd/rbd-mirroring/

"The cluster name in the following examples corresponds to a Ceph configuration 
file of the same name (e.g. /etc/ceph/remote.conf). See the ceph-conf 
documentation for how to configure multiple clusters."

So, in 'remote.conf' you can add the IPv6 addresses of a cluster running on 
IPv6 and on 'ceph.conf' the IPv4 addresses.

The rbd-mirror daemon will eventually talk to librbd/librados which will act as 
a 'proxy' between the two clusters.

I think it works, but that's just based on reading the docs and prior knowledge.

Wido

> Thanks,
> Nick
> 
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[ceph-users] RBD mirroring between a IPv6 and IPv4 Cluster

2016-07-04 Thread Nick Fisk
Hi All,

Quick question. I'm currently in the process of getting ready to deploy a
2nd cluster, which at some point in the next 12 months, I will want to
enable RBD mirroring between the new and existing clusters. I'm leaning
towards deploying this new cluster with IPv6, because Wido says so ;-) 

Question is, will RBD mirroring still be possible between the two? I know
you can't dual stack the core Ceph components, but does RBD mirroring have
the same limitations?

Thanks,
Nick

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