Open Stack

We use ceph with cinder and glance. I don't see a reason not to.

We do not set nova to use it for anything but cinder volumes though.

The reason being, if you set it up that way, your users have no way of opting out of the potential performance hit if using no local storage for non pets.

If you leave it nova local, you can always still get ceph remote storage for the whole vm by requesting the root disk be volume backed.

We also already have a ceph deployment managed without kolla, and that's unlikely to change.

So, for our site, our settings would probably be:
1. Deploy Ceph (enable_ceph="no")
2. Use Ceph with Glance (enable_ceph_glance="yes")
3. Use Ceph with Cinder (enable_ceph_cinder="yes")
4. Use Ceph with Nova (enable_ceph_nova="no")

Thanks,
Kevin
________________________________________
From: Jeffrey Zhang [zhang.lei.fly at gmail.com]
Sent: Wednesday, July 20, 2016 9:51 AM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] OpenStack Kolla - External Ceph

On Wed, Jul 6, 2016 at 1:47 AM, Steven Dake (stdake) <stdake at cisco.com> wrote:
>
> At this point, I feel we are going a direction in which we try to wrap
> everything anybody could possibly want to configure with Kolla by making
> extensive use of global.yml. We would have to introduce flags indicating a
> couple of different scenarios:
>
> 1. Deploy Ceph (already there: enable_ceph="yes")
> 2. Use Ceph with Glance (enable_ceph_glance="yes")
> 3. Use Ceph with Cinder (enable_ceph_cinder="yes")
> 4. Use Ceph with Nova (enable_ceph_nova="yes")
>
>
> I disagree.  If ceph is enabled, then ceph should be used, if ceph is not
> enabled, then ceph shouldn't be used.  That implies all of OpenStack either
> uses Ceph or not.  So we really just need enable_ceph.


why we need separate configuration for ceph? I think if ceph is
enable, all the service should use ceph, too.

--
Regards,
Jeffrey Zhang
Blog: http://xcodest.me

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