- **assigned_to**: Mathi Naickan --> A V Mahesh (AVM)
---
** [tickets:#1522] MDS: Include node name as a part of control events**
**Status:** assigned
**Milestone:** 5.0
**Created:** Tue Oct 06, 2015 03:20 PM UTC by Mathi Naickan
**Last Updated:** Tue Oct 06, 2015 03:20 PM UTC
**Owner:** A V Mahesh (AVM)
It can be noted that currently the MDS NODE_UP event is one of the evidences
that CLM uses to determine and permit a node to join the cluster. Currently
node_id and ipaddress information is sent as a part of NODE_UP event.
However, it is now desired to send node_name also as a part of the MDS control
events for use in the following two scenarios:
a) CLM uses this as additional information to correlate NODE_UP event. i.e. CLM
can match node_name(part of NODE_UP) configured on that with the node_name
configured in the imm.xml. (This will be additional check on top of what CLMNA
provides ofcourse)
b) Some services that are started before CLM(like LOG service has come up with
a case #1480) require to know about node_name for logging the origination
information. This information has to be ideally read using CLM APIs but that is
not possible in scenarios when the membership of a node has not yet been
decided or this information will not be retrievable for logging activities that
takes place during the time when the cluster formation/synchronization is still
in progress.
It has to be seen whether MDS can send node_name as a part of standard MDS
header or as a part of MDS service up event (SVC_UP event) or as a part of MDS
NODE_UP event.
[It appears that sending node_name as a part of service up event (i.e. SVC_UP
event ) is more straightforward from the MDS user's perspective, but needs more
study]
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