Add a converter in OSDMap to split the ruleset into rule

[Loic Dachary <loic@dachary.org>]

[-- Attachment #1: Type: text/plain, Size: 969 bytes --]

Hi,

I've added a few comments inline at https://github.com/xiaoxichen/ceph/commit/354c09131a64ac1e1a67c71794d1a3bab8334ca8 . Could you explain in pseudo code, in the commit message, what upgrade strategy you are trying to implement ? 

For testing purposes, I would create border cases (i.e. having a rule with ruleid != ruleset) in a script similar to 

   https://github.com/ceph/ceph/blob/firefly/src/test/mon/osd-crush.sh

and then trigger the upgrade and check that it enforces the constraint. 

There is a need for a change near 

   https://github.com/ceph/ceph/blob/master/src/crush/CrushWrapper.cc#L787

so that it does not pick a ruleset different from the ruleid. Maybe that could be a first step in the right direction ? I mean, not modifying the existing maps yet, just enforcing ruleid == ruleset by changing the code. So that a new cluster does not suffer from this inconsistency.

Cheers

-- 
Loïc Dachary, Artisan Logiciel Libre


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 263 bytes --]