[gpfsug-discuss] Dual server NSDs - change of hostname

[John Hearns]

Thankyou everyone for replies on this issue. Very helpful.

We have a test setup with three nodes, although no multi-pathed disks. So I can try out removing and replacing disks servers.
I agree with Simon that bringing up a second NIC is probably inviting Murphy in to play merry hell…

The option we are envisioning is re-installing the server(s) but leaving them with the existing FQDNs if we can.



From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Simon Thompson (IT Research Support)
Sent: Thursday, April 05, 2018 4:28 PM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: Re: [gpfsug-discuss] Dual server NSDs - change of hostname

Yeah that was my thoughts too given Bob said you can update the server list for an NSD device in 5.0. I also thought that bringing up a second nic and changing the name etc could bring a whole world or danger from having split routing and rp_filter (been there, had the weirdness, RDMA traffic continues but admin traffic randomly fails, but hey, if you like the world crashing down around you….)

Simon

From: <gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>> on behalf of "makaplan at us.ibm.com<mailto:makaplan at us.ibm.com>" <makaplan at us.ibm.com<mailto:makaplan at us.ibm.com>>
Reply-To: "gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>" <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Date: Thursday, 5 April 2018 at 14:37
To: "gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>" <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Subject: Re: [gpfsug-discuss] Dual server NSDs - change of hostname

To my mind this is simpler:  IF you can mmdelnode without too much suffering, do that. Then reconfigure the host name and whatever else you'd like to do. Then mmaddnode...

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