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Here is what i tried[0].

- pin ceph version in ceph-* container to Jewel.
- the clients (nova/gnocchi/cinder) container use ceph Luminous.

I made some test locally with a env: nova + glance + gnocchi + ceph, seems
it works.


[0] https://review.openstack.org/549466

On Tue, Feb 27, 2018 at 12:53 AM, Michał Jastrzębski <inc007 at gmail.com>
wrote:

> I'm for option 1 definitely. accidental ceph upgrade during routine
> minor version upgrade is something we don't want. We will need big
> warning about this version mismatch in release notes.
>
> On 26 February 2018 at 07:01, Eduardo Gonzalez <dabarren at gmail.com> wrote:
> > I prefer option 1, breaking stable policy is not good for users. They
> will
> > be forced to upgrade a major ceph version during a minor upgrade, which
> is
> > not good and not excepted to be done ever.
> >
> > Regards
> >
> >
> > 2018-02-26 9:51 GMT+01:00 Shake Chen <shake.chen at gmail.com>:
> >>
> >> I prefer to the option 2.
> >>
> >> On Mon, Feb 26, 2018 at 4:39 PM, Jeffrey Zhang <zhang.lei.fly at gmail.com
> >
> >> wrote:
> >>>
> >>> Recently, the Ubuntu jobs on pike branch are red[0]. With some
> debugging,
> >>> i found it is caused by
> >>> package dependency.
> >>>
> >>>
> >>> *Background*
> >>>
> >>> Since we have no time to upgrade ceph from Jewel to Luminous at the end
> >>> of pike cycle, we pinned
> >>> Ceph to Jewel on pike branch. This works on CentOS, because ceph jewel
> >>> and ceph luminous are on
> >>> the different repos.
> >>>
> >>> But in Ubuntu Cloud Archive repo, it bump ceph to Luminous. Even though
> >>> ceph luminous still exists
> >>> on UCA. But since qemu 2.10 depends on ceph luminous, we have to ping
> >>> qemu to 2.5 to use ceph Jewel[1].
> >>> And this works since then.
> >>>
> >>>
> >>> *Now Issue*
> >>>
> >>> But recently, UCA changed the libvirt-daemon package dependency, and
> >>> added following,
> >>>
> >>>     Package: libvirt-daemon
> >>>     Version: 3.6.0-1ubuntu6.2~cloud0
> >>>     ...
> >>>     Breaks: qemu (<< 1:2.10+dfsg-0ubuntu3.4~), qemu-kvm (<<
> >>> 1:2.10+dfsg-0ubuntu3.4~)
> >>>
> >>> It requires qemu 2.10 now. So dependency is broken and nova-libvirt
> >>> container is failed to build.
> >>>
> >>>
> >>> *Possible Solution*
> >>>
> >>> I think there two possible ways now, but none of them is good.
> >>>
> >>> 1. install ceph Luminuous on nova-libvirt container and ceph Jewel in
> >>> ceph-* container
> >>> 2. Bump ceph from jewel to luminous. But this breaks the backport
> policy,
> >>> obviously.
> >>>
> >>> So any idea on this?
> >>>
> >>> [0] https://review.openstack.org/534149
> >>> [1] https://review.openstack.org/#/c/526931/
> >>>
> >>> --
> >>> Regards,
> >>> Jeffrey Zhang
> >>> Blog: http://xcodest.me
> >>>
> >>>
> >>> ____________________________________________________________
> ______________
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> >>> Unsubscribe:
> >>> OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
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> >>>
> >>
> >>
> >>
> >> --
> >> Shake Chen
> >>
> >>
> >> ____________________________________________________________
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> >>
> >
> >
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-- 
Regards,
Jeffrey Zhang
Blog: http://xcodest.me
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