Could not insert module cortx-motr/m0tr.ko: Network is down

[hessio]

[root@cortxtest cortx-motr]#  sudo ./scripts/m0 run-ut
----- run_ut -----
insmod: ERROR: could not insert module /root/cortx-motr/m0tr.ko: Network is down
Error loading /root/cortx-motr/m0tr.ko node_uuid=abcdef01-2345-6789-0123-456789ABCDEF Aborting.
Error unloading /root/cortx-motr/m0tr.ko.

Does anyone know what could be causing this issue?

[andriytk]

Looks like some problem with lnet (you can confirm with lctl list_nids and check for errors with dmesg | tail -50). If it's the case and you see in dmesg something like:

[41061.409598] LNetError: 8891:0:(socklnd.c:2795:ksocknal_startup()) ksocklnd: requested 1 but only 0 interfaces found
[41062.409898] LNetError: 105-4: Error -100 starting up LNI tcp
[41062.411483] subsystem net/lnet init failed: rc = -100

Try to restart lnet:

sudo rmmod lnet

If it refuses to unload because of some dependent module (like ksocklnd) - unload that module also:

sudo rmmod ksocklnd lnet

And then start lnet back:

sudo modprobe lnet
sudo lctl net up

[kiwionly2]

This info is very helpful, Is that possible to add to Quick start guide troubleshooting section ?

[andriytk]

Sure, feel free to create a PR for this @kiwionly2.