cmclnodelist query

[P Arumugavel]

Hi All,

Belated wishes for an another wonderful year 2011.

I am little faraway from MC SG cluster. Please help me on below query.

Actually what is the purpose in need of cmclnodelist file on all nodes present in a cluster. Is it required in all versions of SG or?

Rgds...

[Ismail Azad]

Hi,

On service guard 11.17 this file /etc/cmcluster/cmclnodelist is only used at the time of service guard configuration . It is analogous to the building of trust on a clustered environment between nodes.

Regards
Ismail Azad

[Manix]

Hello Friend,

I spent some time searching about roles & usage about CMCLNODELIST in different versions
of MCSG

Till 11.16 cmclnodelist was uses as bootstraper & a file base permission facility
That is at the time of initializing the setup
& granted the users permissions to access the cluster nodes.


If you upgrade a cluster to Serviceguard A.11.16 or later, the cmclnodelist entries are
automatically updated into access control policies in the cluster configuration file. All nonroot
user-hostname pairs will be given the role of Monitor

But from 11.17 there are role based policy
in cluster.conf_ascii file so cmclnodelist
is just a cluster bootstrpper.

Even in 11.20 where we have "ssh" level connectivity between cluster nodes as a new feature , we need cmclnodelist just to initiate cluster formation.

Hope this will help.

Thanks & Regards

Manix

[SoorajCleris · Accepted solution]

Hi,

Thank you verymuch for the wishes. Wish you the same!

cmclnodelist was inplemented in SG, A.11.16 onwards. This was implemented considering the risk using r services.

==> cmclnodelist is checked when ever the cluster nodes are communicated each other.
You can use it for Access control.

It is refered when cluster is created , when cluster query commands are used.

you can use rhosts file also instead of cmclnodelist.

http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c02056246/c02056246.pdf

page 187


Regards,
Sooraj