[lustre-discuss] Lustre rpm install creating a file that breaks lustre

[Kurt Strosahl]

the lnet modules load, but when I start the lnet service it says that the network is down.  I backed everything out, removed the file, and then started the lnet service again and it worked properly.

________________________________
From: Chris Horn <hornc at cray.com>
Sent: Wednesday, October 2, 2019 2:48 PM
To: Kurt Strosahl <strosahl at jlab.org>; lustre-discuss at lists.lustre.org <lustre-discuss at lists.lustre.org>
Subject: [EXTERNAL] Re: [lustre-discuss] Lustre rpm install creating a file that breaks lustre


Might be best to open a ticket for this. What was the nature of the failure?



Chris Horn



From: lustre-discuss <lustre-discuss-bounces at lists.lustre.org> on behalf of Kurt Strosahl <strosahl at jlab.org>
Date: Wednesday, October 2, 2019 at 1:30 PM
To: "lustre-discuss at lists.lustre.org" <lustre-discuss at lists.lustre.org>
Subject: [lustre-discuss] Lustre rpm install creating a file that breaks lustre



Good Afternoon,



    While getting lustre 2.10.8 running on a RHEL 7.7 system I found that the RPM install was putting a file in /etc/modprobe.d that was preventing lnet from starting properly.



the file is ko2iblnd.conf, which contains the following...



alias ko2iblnd-opa ko2iblnd

options ko2iblnd-opa peer_credits=128 peer_credits_hiw=64 credits=1024 concurrent_sends=256 ntx=2048 map_on_demand=32 fmr_pool_size=2048 fmr_flush_trigger=512 fmr_cache=1 conns_per_peer=4



install ko2iblnd /usr/sbin/ko2iblnd-probe



Our system is running infiniband, not omnipath.  So I'm mot sure why this file is being put in place.  Removing the file allows lnet to start properly.



w/r,

Kurt J. Strosahl
System Administrator: Lustre, HPC
Scientific Computing Group, Thomas Jefferson National Accelerator Facility
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