[ceph-users] ceph-disk is now deprecated

Alfredo Deza adeza at redhat.com
Tue Nov 28 03:54:12 PST 2017


On Tue, Nov 28, 2017 at 3:12 AM, Wido den Hollander <wido at 42on.com> wrote:
>
>> Op 27 november 2017 om 14:36 schreef Alfredo Deza <adeza at redhat.com>:
>>
>>
>> For the upcoming Luminous release (12.2.2), ceph-disk will be
>> officially in 'deprecated' mode (bug fixes only). A large banner with
>> deprecation information has been added, which will try to raise
>> awareness.
>>
>
> As much as I like ceph-volume and the work being done, is it really a good idea to use a minor release to deprecate a tool?
>
> Can't we just introduce ceph-volume and deprecate ceph-disk at the release of M? Because when you upgrade to 12.2.2 suddenly existing integrations will have deprecation warnings being thrown at them while they haven't upgraded to a new major version.

ceph-volume has been present since the very first release of Luminous,
the deprecation warning in ceph-disk is the only "new" thing
introduced for 12.2.2.

>
> As ceph-deploy doesn't support ceph-disk either I don't think it's a good idea to deprecate it right now.

ceph-deploy work is being done to support ceph-volume exclusively
(ceph-disk support is dropped fully), which will mean a change in its
API in a non-backwards compatible
way. A major version change in ceph-deploy, documentation, and a bunch
of documentation is being worked on to allow users to transition to
it.

>
> How do others feel about this?
>
> Wido
>
>> We are strongly suggesting using ceph-volume for new (and old) OSD
>> deployments. The only current exceptions to this are encrypted OSDs
>> and FreeBSD systems
>>
>> Encryption support is planned and will be coming soon to ceph-volume.
>>
>> A few items to consider:
>>
>> * ceph-disk is expected to be fully removed by the Mimic release
>> * Existing OSDs are supported by ceph-volume. They can be "taken over" [0]
>> * ceph-ansible already fully supports ceph-volume and will soon default to it
>> * ceph-deploy support is planned and should be fully implemented soon
>>
>>
>> [0] http://docs.ceph.com/docs/master/ceph-volume/simple/
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