[gentoo-dev] [rfc] New global USE flag: rbd

[gentoo-dev] [rfc] New global USE flag: rbd

[Andrew Savchenko]

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Hi all,

8 packages are using either rbd or rados USE flag for Rados
Block Device support:

use.local.desc:app-backup/bareos:rados - Enable rados storage backend
use.local.desc:app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
use.local.desc:app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
use.local.desc:app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
use.local.desc:net-analyzer/rrdtool:rados - Enable support for librados from sys-cluster/ceph
use.local.desc:net-libs/xrootd:rbd - Enable rados block device support via sys-cluster/ceph
use.local.desc:sys-block/fio:rbd - Enable Rados block device support via sys-cluster/ceph
use.local.desc:sys-block/tgt:rbd - Add support for ceph block devices

Suggested description:
rbd - Enable rados block device support via sys-cluster/ceph

Best regards,
Andrew Savchenko

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Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Daniel Campbell]

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On 12/25/2016 11:45 PM, Andrew Savchenko wrote:
> Hi all,
> 
> 8 packages are using either rbd or rados USE flag for Rados
> Block Device support:
> 
> use.local.desc:app-backup/bareos:rados - Enable rados storage backend
> use.local.desc:app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
> use.local.desc:app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
> use.local.desc:app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
> use.local.desc:net-analyzer/rrdtool:rados - Enable support for librados from sys-cluster/ceph
> use.local.desc:net-libs/xrootd:rbd - Enable rados block device support via sys-cluster/ceph
> use.local.desc:sys-block/fio:rbd - Enable Rados block device support via sys-cluster/ceph
> use.local.desc:sys-block/tgt:rbd - Add support for ceph block devices
> 
> Suggested description:
> rbd - Enable rados block device support via sys-cluster/ceph
> 
> Best regards,
> Andrew Savchenko
> 

Do we expect the list of packages using RBD to grow? If so then sure, if
for no other reason than to give a consistent description.

-- 
Daniel Campbell - Gentoo Developer
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Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Andrew Savchenko]

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On Mon, 26 Dec 2016 00:17:03 -0800 Daniel Campbell wrote:
> On 12/25/2016 11:45 PM, Andrew Savchenko wrote:
> > Hi all,
> > 
> > 8 packages are using either rbd or rados USE flag for Rados
> > Block Device support:
> > 
> > use.local.desc:app-backup/bareos:rados - Enable rados storage backend
> > use.local.desc:app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
> > use.local.desc:app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
> > use.local.desc:app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
> > use.local.desc:net-analyzer/rrdtool:rados - Enable support for librados from sys-cluster/ceph
> > use.local.desc:net-libs/xrootd:rbd - Enable rados block device support via sys-cluster/ceph
> > use.local.desc:sys-block/fio:rbd - Enable Rados block device support via sys-cluster/ceph
> > use.local.desc:sys-block/tgt:rbd - Add support for ceph block devices
> > 
> > Suggested description:
> > rbd - Enable rados block device support via sys-cluster/ceph
> > 
> > Best regards,
> > Andrew Savchenko
> > 
> 
> Do we expect the list of packages using RBD to grow? 

It is likely, ceph popularity is growing.

> If so then sure, if
> for no other reason than to give a consistent description.

Anyway IIRC we have a rule: local flags for >=5 packages with
the same meaning => global flag.

Best regards,
Andrew Savchenko

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Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Aaron Bauman]

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On 12/26/2016 05:38 PM, Andrew Savchenko wrote:
> On Mon, 26 Dec 2016 00:17:03 -0800 Daniel Campbell wrote:
>> On 12/25/2016 11:45 PM, Andrew Savchenko wrote:
>>> Hi all,
>>>
>>> 8 packages are using either rbd or rados USE flag for Rados
>>> Block Device support:
>>>
>>> use.local.desc:app-backup/bareos:rados - Enable rados storage backend
>>> use.local.desc:app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
>>> use.local.desc:app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
>>> use.local.desc:app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
>>> use.local.desc:net-analyzer/rrdtool:rados - Enable support for librados from sys-cluster/ceph
>>> use.local.desc:net-libs/xrootd:rbd - Enable rados block device support via sys-cluster/ceph
>>> use.local.desc:sys-block/fio:rbd - Enable Rados block device support via sys-cluster/ceph
>>> use.local.desc:sys-block/tgt:rbd - Add support for ceph block devices
>>>
>>> Suggested description:
>>> rbd - Enable rados block device support via sys-cluster/ceph
>>>
>>> Best regards,
>>> Andrew Savchenko
>>>
>> Do we expect the list of packages using RBD to grow? 
> It is likely, ceph popularity is growing.
>
>> If so then sure, if
>> for no other reason than to give a consistent description.
> Anyway IIRC we have a rule: local flags for >=5 packages with
> the same meaning => global flag.

Correct.  New global flag sounds good to me.

>
> Best regards,
> Andrew Savchenko



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Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Matthew Thode]

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On 12/26/2016 02:17 AM, Daniel Campbell wrote:
> On 12/25/2016 11:45 PM, Andrew Savchenko wrote:
>> Hi all,
>>
>> 8 packages are using either rbd or rados USE flag for Rados
>> Block Device support:
>>
>> use.local.desc:app-backup/bareos:rados - Enable rados storage backend
>> use.local.desc:app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
>> use.local.desc:app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
>> use.local.desc:app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
>> use.local.desc:net-analyzer/rrdtool:rados - Enable support for librados from sys-cluster/ceph
>> use.local.desc:net-libs/xrootd:rbd - Enable rados block device support via sys-cluster/ceph
>> use.local.desc:sys-block/fio:rbd - Enable Rados block device support via sys-cluster/ceph
>> use.local.desc:sys-block/tgt:rbd - Add support for ceph block devices
>>
>> Suggested description:
>> rbd - Enable rados block device support via sys-cluster/ceph
>>
>> Best regards,
>> Andrew Savchenko
>>
> 
> Do we expect the list of packages using RBD to grow? If so then sure, if
> for no other reason than to give a consistent description.
> 

I think sys-cluster/cinder and maybe nova/glance could use it.

-- 
-- Matthew Thode (prometheanfire)


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Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Kristian Fiskerstrand]

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On 12/26/2016 08:45 AM, Andrew Savchenko wrote:
> 8 packages are using either rbd or rados USE flag for Rados
> Block Device support:

Are there other possibly conflicting issues of using "rados" rather than
"rbd" as name (or "radosbd") or someting a bit more verbose than rbd.

-- 
Kristian Fiskerstrand
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Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Robin H. Johnson]

On Mon, Dec 26, 2016 at 10:45:26AM +0300, Andrew Savchenko wrote:
> 8 packages are using either rbd or rados USE flag for Rados
> Block Device support:
RBD != RADOS.

RBD is the block-device-mapper on top of Ceph/RADOS.

There are other pieces to put on top of Ceph, such as CephFS & RADOSGW
(S3/Swift access to RADOS)

That said, I think at the growth of Ceph, we will have usage for both of
the USE flags.

-- 
Robin Hugh Johnson
Gentoo Linux: Dev, Infra Lead, Foundation Trustee & Treasurer
E-Mail   : robbat2@gentoo.org
GnuPG FP : 11ACBA4F 4778E3F6 E4EDF38E B27B944E 34884E85
GnuPG FP : 7D0B3CEB E9B85B1F 825BCECF EE05E6F6 A48F6136

Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Andrew Savchenko]

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Hi,

On Mon, 26 Dec 2016 19:25:29 +0000 Robin H. Johnson wrote:
> On Mon, Dec 26, 2016 at 10:45:26AM +0300, Andrew Savchenko wrote:
> > 8 packages are using either rbd or rados USE flag for Rados
> > Block Device support:
> RBD != RADOS.

Thanks for pointing this out.
 
> RBD is the block-device-mapper on top of Ceph/RADOS.
> 
> There are other pieces to put on top of Ceph, such as CephFS & RADOSGW
> (S3/Swift access to RADOS)
> 
> That said, I think at the growth of Ceph, we will have usage for both of
> the USE flags.
 
Then how about the following list for rbd:

app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
net-libs/xrootd:rbd - Enable rados block device support via sys-cluster/ceph
sys-block/fio:rbd - Enable Rados block device support via sys-cluster/ceph
sys-block/tgt:rbd - Add support for ceph block devices

Also it seems that USE=rados is also invalid, because according to
Ceph architecture [1] librados != rados and what these packages use
is really librados:

app-backup/bareos:rados - Enable rados storage backend
net-analyzer/rrdtool:rados - Enable support for librados from sys-cluster/ceph

So I propose to rename these USE flags to librados to be consistent.

[1] http://docs.ceph.com/docs/master/architecture/
Looks like docs.ceph.com is down right now, so here is another copy:
http://www.virtualtothecore.com/wp-content/uploads/2015/02/ceph-architecture-1.png

Best regards,
Andrew Savchenko

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Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Vadim A. Misbakh-Soloviov]

Shouldn't this
>> app-backup/bareos:rados - Enable rados storage backend
> storage backend
go to the first list?

Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Andrew Savchenko]

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Hi,

On Mon, 26 Dec 2016 20:05:58 +0100 Kristian Fiskerstrand wrote:
> On 12/26/2016 08:45 AM, Andrew Savchenko wrote:
> > 8 packages are using either rbd or rados USE flag for Rados
> > Block Device support:
> 
> Are there other possibly conflicting issues of using "rados" rather than
> "rbd" as name (or "radosbd") or someting a bit more verbose than rbd.

As was pointed out by Robin, rados and rbd are different.

Considering verbose alternatives to rbd: they may be invented, but
will be non-standard and this will confuse our users: it will be
similar to "portableng" instead of "png".

Since we don't have rbd meaning conflict right now, it should be
safe to use. In case of future issues, local USE may be used for
alternative meanings.

Best regards,
Andrew Savchenko

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Re: [gentoo-dev] [rfc] New global USE flag: rbd

[Andrew Savchenko]

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On Tue, 03 Jan 2017 15:43:16 +0700 Vadim A. Misbakh-Soloviov wrote:
> Shouldn't this
> >> app-backup/bareos:rados - Enable rados storage backend
> > storage backend
> go to the first list?

No, judging from its source code in uses librados directly.
Though current description is indeed ambiguous.

Best regards,
Andrew Savchenko

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