[Openais] corosync - CPG model_init + callback with totem ringid and members

[Jan Friesse]

Dave,

> 
> Oh, and I may have just invented a time machine by merging partitioned
> clusters!
> 
> 1270661597 cluster node 1 added seq 2128
> 1270661597 fenced:daemon conf 3 1 0 memb 1 2 4 join 1 left
> 1270661597 cpg_mcast_joined retried 4 protocol
> 1270661597 fenced:daemon ring 1:2128 3 memb 1 2 4
> 1270661597 fenced:default conf 3 1 0 memb 1 2 4 join 1 left  (*)
> 1270661597 add_change cg 5 joined nodeid 1
> 1270661597 add_change cg 5 counts member 3 joined 1 remove 0 failed 0
> 1270661597 check_ringid cluster 2128 cpg 2:2124
> 1270661597 fenced:default ring 1:2128 3 memb 1 2 4  (**)
> 1270661597 check_ringid done cluster 2128 cpg 1:2128
> 1270661597 check_quorum done
> 
> * confchg callback adding node 1
> ** totem callback adding node 1

this is something little different and it is one of your requirements.

Two nodes as example is enough:

- Starting corosync on node1
- Starting cpg app (app1) on node1
- app1 receive confchg callback and if desired totem callback
- Starting corosync on node2
- app1 receive totem callback

^^^^ this is what Chrissie is talking about. totem callback precede 
confch callback

- starting cpg app (app2) on node2
   - app2 receive confchg callback and if desired totem callback
   - app1 receive confchg
SPLIT
   - app1 receive confchg callback and totem callback
   - app2 receive confchg callback and totem callback
MERGE
   - app1 receive confchg callback and totem callback
   - app2 receive confchg callback and totem callback

^^^ This is what you are talking about. Confchg precede totem callback 
(as your requirements)

Simply because app1/2 are in time of merge running.

Anyway, can you please send me (exactly) what problem (original problem) 
are you trying to solve?

Regards,
   Honza