Below is the implementation notes, please comment:
Configuration Degenerated:
1. Check for other SUs of SG. If only one SU configured or others are
locked:
return BAD OP.
Faults Degenerated Or Temporary degeneration:
1. If the containing nodes (hosting all other SUs) absent:
return BAD OP.
2. If node (hosting any of the SUs) is joining(A case of Temporary
degeneration):
return TRY_AGAIN.
3. If the containing nodes have joined:
If any one of the SUs is in
instantiating/restarting/terminating state(A case of Temporary degeneration):
return TRY_AGAIN.
If any one of the SUs is in Disabled/OutOfService/Instantiation
failed/Termination failed:
return BAD OP.
---
** [tickets:#1294] amf: BAD_OPERATION needs to be returned for si-swap when
there is single controller**
**Status:** accepted
**Milestone:** 4.5.2
**Created:** Tue Mar 31, 2015 07:51 AM UTC by Sirisha Alla
**Last Updated:** Tue Jul 07, 2015 08:11 AM UTC
**Owner:** Nagendra Kumar
In the scenario of https://sourceforge.net/p/opensaf/tickets/1169/, when the
standby middleware SU is in instantiating state then TRY_AGAIN needs to be
returned. Else BAD_OPERATION needs to be returned. Returning TRY_AGAIN in all
scenarios is a deviation from spec.
AMF spec in 9.4.8 says:
"If no standby assignments are available for an SI (potentially because the AMF
cluster is in a degenerated status, and reduction procedures have been engaged)
when this operation is invoked on a particular logical entity, the
SA_AIS_ERR_BAD_OPERATION error value shall be returned.
In other words, this operation shall be allowed by the Availability Management
Framework to proceed under the following circumstances.
1) The concerned SI is assigned active or quiescing to one service unit.
2) The concerned SI is assigned standby to at least another service unit.
3) The HA readiness state of the service unit currently assigned the standby HA
state for the target service instance is ready-for-assignment.
4) The node capacity limits for the affected AMF nodes are not violated when the
HA state assignments are swapped.
The Availability Management Framework shall not proceed with this procedure when
the presence state of the constituent service units of the service group
protecting the SI is instantiating, restarting, or terminating, and should
return an SA_AIS_ERR_TRY_AGAIN error value conveying that the action is valid
but not currently possible."
---
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