Hello Fraser,
The schema is propagated on all replica. So if you update the
schema, the updates will be eventually present everywhere.
There is two ways to update the schema.
* online update (prefered), you simply do a ldapmodify on
'cn=schema' adding/updating attributetypes/objectclasses
* offline. You stop a replica/master, update the schema files,
start the server. This is not the prefered solution because
depending on version of DS it can take more time to detect the
new schema and propagated it.
Do you know how CS schema upgrade will be done (online/offline) ?
Is it the new definitions
http://www.freeipa.org/page/V4/Certificate_Profiles#Schema ?
Thanks
thierry
On 06/17/2015 07:52 AM, Martin Kosek wrote:
On 06/16/2015 06:39 PM, Fraser Tweedale wrote:
I fixed several issues which broke Dogtag upgrades involving
particular versions; these will be in the next release.
I haven't yet gotten to to the reported failure running
ipa-replica-upgrade on a replica (but I haven't forgotten about it
either.) This is the only issue affecting *fresh installs* that I
am aware of. If you know of others please let me know!
The remaining Dogtag-related upgrade problem is caused by new DS
schema on the Dogtag side, which is used for LDAP-based profiles.
There is not yet an automatic schema upgrade facility for Dogtag, so
the new schema was missing.
The planned approach is:
- Either Dogtag or FreeIPA will add the new CS schema on upgrade.
(Eventually Dogtag will need to manage its own schema updates but
right now there is no facility, and the new schema is only used by
IPA.)
If possible, I would prefer Dogtag to update the schema the best it
can, otherwise there is a risk of collisions or upgrade breakages if
FreeIPA starts updating Dogtag internals.
- Migrate file-based profiles into LDAP during IPA upgrade. But for
this to work, I need to make sure that if new schema is added,
then entries that use the new schema, replication to instances
that did not yet have the new schema will not break. Anyone who
knows LDAP better than me, please share your knowledge!
Shouldn't schema just replicate, when the first FreeIPA+CS is
upgraded? CCing Thierry for reference, he had a lot of fun with schema
upgrades.
- If my assumptions about replication are wrong, the best approach
will probably be to have the administrator perform profile
migration (via a script) as a later task, after all replicas have
been upgraded.
Not a fan of this, FreeIPA upgrades should be ideally automatic and
straightforward. So far we did not have problems with automatic
upgrades (well, except Dogtag9->Dogtag10 upgrade - I would prefer not
to have such situation again).
Thanks for updates!
Martin
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