Re: [ceph-users] The mystery of sync modules

[Janne Johansson]

2018-04-27 17:33 GMT+02:00 Sean Purdy :
>
> Mimic has a new feature, a cloud sync module for radosgw to sync objects
> to some other S3-compatible destination.
>
> This would be a lovely thing to have here, and ties in nicely with object
> versioning and DR.  But I am put off by confusion and complexity with the
> whole multisite/realm/zone group/zone thing, and the docs aren't very
> forgiving, including a recommendation to delete all your data!
>
> Is there a straightforward way to set up the additional zone for a sync
> module with a preexisting bucket?  Whether it's the elasticsearch metadata
> search or the cloud replication, setting up sync modules on your *current*
> buckets must be a FAQ or at least frequently desired option.
>
>
Amen to "docs are very much lacking".

I tried to make buckets end up on different pools (== diff. disks) and had
to fumble around the docs to (try to) understand at which level to make the
split that makes some data end up and X and some at Y. The docs seemed to
me to be focused just on synching, and not on "place client Xs data here"
or "let client choose location" or something which would suit me. When we
upgraded from Hammer/Infernalis to Jewel we just made Zonegroups and stuff
to make S3 work at all, but no docs really tell me what the new separation
levels are for so that I may edit the right place.

The blogs that did somewhat point to my usecase was from when it still had
realms. 8-(


-- 
May the most significant bit of your life be positive.
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[ceph-users] The mystery of sync modules

[Sean Purdy]

Hi,


Mimic has a new feature, a cloud sync module for radosgw to sync objects to 
some other S3-compatible destination.

This would be a lovely thing to have here, and ties in nicely with object 
versioning and DR.  But I am put off by confusion and complexity with the whole 
multisite/realm/zone group/zone thing, and the docs aren't very forgiving, 
including a recommendation to delete all your data!

Is there a straightforward way to set up the additional zone for a sync module 
with a preexisting bucket?  Whether it's the elasticsearch metadata search or 
the cloud replication, setting up sync modules on your *current* buckets must 
be a FAQ or at least frequently desired option.

Do I need a top-level realm?  I'm not actually using multisite for two 
clusters, I just want to use sync modules.  If I do, how do I transition my 
current default realm and RGW buckets?

Any blog posts to recommend?

It's not a huge cluster, but it does include production data.


Thanks,

Sean
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