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SE65416 - HASM-NF: MRI FOR CLUSTER MONITOR HMC REST SUPPORT

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 APAR (Authorized Program Analysis Report)

Abstract

HASM-NF: MRI FOR CLUSTER MONITOR HMC REST SUPPORT

Error Description

The IBM i cluster technology makes use of user registered      
cluster node monitors to determine whether a system has truly  
failed when communication is lost to the system.  When a user  
registers a cluster node monitor on a node the node will        
register a Common Information Model (CIM) indication handler    
program in Cluster Resource Services with the CIM server        
supported by a specified Hardware Management Console (HMC).    
Should a node managed by the monitored HMC suffer a failure or  
crash the HMC will send a message (via the CIM server) to all  
registered CIM indication handlers containing data on the nature
of the failure and the node affected by the problem.  Cluster  
Resource Services will take appropriate action based on the    
nature of the reported failure.                                
                                                               
The HMC is being updated to replace the existing CIM server with
a new representational state transfer (REST) based interface.  
HMC version 850 (V8R8.5.0) will be the last version of HMC to  
support the CIM server, and will also be the first version of  
HMC to support all REST API functionality required by the IBM i
cluster monitor.                                                
                                                               
This fix enables cluster node monitors to use the HMC REST      
interface.                                                      

Problem Summary

The IBM i cluster technology makes use of user registered      
cluster node monitors to determine whether a system has truly  
failed when communication is lost to the system.  When a user  
registers a cluster node monitor on a node the node will        
register a Common Information Model (CIM) indication handler    
program in Cluster Resource Services with the CIM server        
supported by a specified Hardware Management Console (HMC).    
Should a node managed by the monitored HMC suffer a failure or  
crash the HMC will send a message (via the CIM server) to all  
registered CIM indication handlers containing data on the nature
of the failure and the node affected by the problem.  Cluster  
Resource Services will take appropriate action based on the    
nature of the reported failure.                                
                                                               
The HMC is being updated to replace the existing CIM server with
a new representational state transfer (REST) based interface.  
HMC version V8R8.5.0 will be the last version of HMC to support
the CIM server, and will also be the first version of HMC to    
support all REST API functionality required by the IBM i cluster
monitor.                                                        
                                                               
Existing cluster node monitors using the CIM server will not be
able to communicate with the HMC if the HMC version is V8R8.6.0
or later.  For later versions of the HMC the CIM cluster node  
monitors must be replaced with REST cluster node monitors.      

Problem Conclusion

Cluster node monitors can be either CIM monitors or REST        
monitors.  In the past only CIM cluster node monitors were      
supported.                                                      

Temporary Fix

Comments

Circumvention


PTFs Available

R710 SI62544 PTF Cover Letter   7192
R720 SI61912 PTF Cover Letter   7068

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... No
Component.................................. 5770HAS00
Failing Module.......................... RCHMGR
Reported Release................... R720
Duplicate Of..............................




System i Support

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Document Information

Modified date:
28 July 2017