Re: RBD Mirror Question

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On Tue, Oct 2, 2018 at 4:47 PM Vikas Rana <vikasrana3@xxxxxxxxx> wrote:
>
> Hi,
>
> We have a CEPH 3 node cluster at primary site. We created a RBD image and the image has about 100TB of data.
>
> Now we installed another 3 node cluster on secondary site. We want to replicate the image at primary site to this new cluster on secondary site.
>
> As per documentation, we enabled journaling on primary site. We followed all the procedure and peering looks good but the image is not copying.
> The status is always showing down.

Do you have an "rbd-mirror" daemon running on the secondary site? Are
you running "rbd mirror pool status" against the primary site or the
secondary site? The mirroring status is only available on the sites
running "rbd-mirror" daemon (the "down" means that the cluster you are
connected to doesn't have the daemon running).

> So my question is, is it possible to replicate a image which already have some data before enabling journalling?

Indeed -- it will perform a full image sync to the secondary site.

> We are using the image mirroring instead of pool mirroring. Do we need to create the RBD image on secondary site? As per documentation, its not required.

The only difference between the two modes is whether or not you need
to run "rbd mirror image enable" or not.

> Is there any other option to copy the image to the remote site?

No other procedure should be required.

> Thanks,
> -Vikas
> _______________________________________________
> ceph-users mailing list
> ceph-users@xxxxxxxxxxxxxx
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com



-- 
Jason
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