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We did load balancers in each logical region with affinity set on the
proxies per region. We use Keystone and I'm curious why you aren't but
that's not the end-all, just curious. You can control replication behavior
after storage policies are implemented (Juno or pre-Juno) but what you want
to do is definitely possible.

Following up on my friend Kuo's question, what *is* your auth method?

FYI, you have a myriad of options (not just two), but it seems you're
seeking public DNS approaches as opposed to deploying your own front-end?


*Adam Lawson*
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On Tue, Jun 24, 2014 at 12:36 PM, Shrinand Javadekar <
shrinand at maginatics.com> wrote:

> So I believe, there are largely two options:
>
> 1) DNS Magic
> 2) Separate endpoints for separate regions.
>
> Thanks everyone!
>
> On Mon, Jun 23, 2014 at 8:58 PM, Michael Gale <gale.michael at gmail.com>
> wrote:
> > One more thing, do you read:
> >
> https://swiftstack.com/blog/2012/09/16/globally-distributed-openstack-swift-cluster/
> >
> >
> > On Mon, Jun 23, 2014 at 9:57 PM, Michael Gale <gale.michael at gmail.com>
> > wrote:
> >>
> >> Hello,
> >>
> >>    How are you planning to replicate data between regions? You said you
> >> don't want container-sync.
> >>
> >> Also Swift offers read affinity and write affinity, I believe this is
> >> setup on the Swift proxy. The affinity settings allow the proxy servers
> to
> >> restrict read and write requests to local resources. The proxy server
> >> endpoints are usually handled out by keystone.
> >>
> >> If you are not using keystone then if it up to you to choose a service
> >> discovery method:
> >>
> >> Geo-DNS
> >> Anycast IP address
> >> Unique DNS name per location
> >> etc
> >>
> >> Michael
> >>
> >>
> >>
> >>
> >>
> >> On Mon, Jun 23, 2014 at 9:29 PM, Shrinand Javadekar
> >> <shrinand at maginatics.com> wrote:
> >>>
> >>> I don't plan to use Keystone at all.
> >>>
> >>> On Mon, Jun 23, 2014 at 8:13 PM, Kuo Hugo <tonytkdk at gmail.com> wrote:
> >>> > Do you plan to have two keystone servers in each region or single
> >>> > keystone
> >>> > server for both east/west coast Swift proxy?
> >>> >
> >>> > 1. Geo-DNS + single Swift region endpoint in keystone
> >>> > 2. Geo-DNS for Keystone servers and each Keystone server returns the
> >>> > local
> >>> > Swift endpoint.
> >>> > 3. Let user to switch which region of Swift endpoint would they like
> to
> >>> > use.
> >>> >
> >>> >
> >>> > Hope it help
> >>> >
> >>> >
> >>> > 2014-06-24 8:38 GMT+08:00 Shrinand Javadekar <
> shrinand at maginatics.com>:
> >>> >>
> >>> >> Hi,
> >>> >>
> >>> >> I am trying to understand the notion of "regions" in Swift. To start
> >>> >> with, it's kinda confusing that the notion of "region" in Keystone
> is
> >>> >> not exactly the same as that of Swift. So I could authenticate with
> >>> >> Keystone, get a Swift endpoint for a region (Keystone's notion of a
> >>> >> region) and write/read data. That could then possibly translate to
> >>> >> data writes/reads from another region (Swift's notion of a region).
> >>> >>
> >>> >> So, as per the example in [1], let's say I have two regions: SF and
> >>> >> NYC. I would like the have clients write to the most local region.
> How
> >>> >> do I achieve this? I am *not* looking to use container-sync.
> >>> >>
> >>> >> I had a quick word about this on the #openstack-swift irc channel.
> >>> >> Asking over email for better clarity and more details. I believe the
> >>> >> way to go about this would be:
> >>> >>
> >>> >> (1) Have two Swift proxy servers in each region. Configure DNS such
> >>> >> that the domain name of the Swift proxy server resolves to the
> >>> >> "closest" node.
> >>> >>
> >>> >> Each of these proxy servers will be configured with read/write
> >>> >> affinity to object servers in its region.
> >>> >>
> >>> >> This is great because it means I only have to use one endpoint.
> >>> >>
> >>> >> (2) Have two Swift proxy servers in each region with separate IPs.
> >>> >> Inform clients about the closest endpoints and let clients write to
> >>> >> the correct proxy servers. If they make a mistake, data can still
> get
> >>> >> written to the in-correct node.
> >>> >>
> >>> >> Any other way? Is there a way to query the available regions (say a
> >>> >> latency test) and use the one which is fastest to reach?
> >>> >>
> >>> >> Thanks in advance.
> >>> >> -Shri
> >>> >>
> >>> >> _______________________________________________
> >>> >> Mailing list:
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> >>> >> Post to     : openstack at lists.openstack.org
> >>> >> Unsubscribe :
> >>> >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> >>> >
> >>> >
> >>>
> >>> _______________________________________________
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> >>
> >>
> >>
> >>
> >> --
> >>
> >> “We, the unwilling, led by the unknowing, are doing the impossible for
> the
> >> ungrateful. We have done so much, for so long, with so little, we are
> now
> >> qualified to do anything with nothing.”
> >>
> >> ― Konstantin Josef Jireček
> >
> >
> >
> >
> > --
> >
> > “We, the unwilling, led by the unknowing, are doing the impossible for
> the
> > ungrateful. We have done so much, for so long, with so little, we are now
> > qualified to do anything with nothing.”
> >
> > ― Konstantin Josef Jireček
>
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