The discussion around a valid usecase is still in progress, but if we could
become ignorant for a while and briefly talk the solution as started in this
ticket or in #1179 and #1180, then the following is one acceptable way of
handling this scenario:
"OpenSAF(processes) is restarted without affecting application processes and
the SAF agents return some agreedupon SAF error code to applications till the
controller nodes are up again"
i.e.
1) Upon receiving MDS VDEST down for AMFD, the AMFND on payload will not reboot
that node. Subsequently, AMFND kills(as if a 'opensaf stop' was issued) all
opensaf(middleware) processes on that node and waits for the MDS_UP event for
AMFD. Upon receiving MDS_UP event, amfnd restarts opensaf by invoking the
opensafd script i.e. '/etc/init.d/opensafd restart'.
(Alternatively, some other process like NID can be modified to run forever such
that AMFND can exit after cleaning up all the middleware processes. NID will
wait for a 'controller is up' indication i.e. shall wait for the MDS UP event
for AMFD and shall continue to spawn the rest of the services.
2) Upon receIving MDS VDEST down for the director processes, the agent
libraries return BAD_HANDLE(or some new error code) to any API and return
ERR_TRY_AGAIN for INITIALIZE till the controllers are up again.
Post such 'silent-opensaf-restart', the cluster will continue to run from the
persistent configuration is available(till the time when the contollers went
down).
---
** [tickets:#1132] opensaf shall support temporary unavailbility of both
controllers**
**Status:** unassigned
**Milestone:** 4.6.FC
**Created:** Tue Sep 23, 2014 01:51 PM UTC by Hans Feldt
**Last Updated:** Wed Oct 29, 2014 11:37 AM UTC
**Owner:** nobody
The opensaf cluster shall survive that both system controllers are temporarily
down (no cluster reboot as today)
After the system controllers recover, IMM and AMF state shall be as before the
controllers got unavailable.
Use case: opensaf cloud deployment
To be refined a lot...
---
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