Infiniband metrics not collected if irdma kernel module is loaded #2769
Description
Host operating system: output of uname -a
Linux xxxxx 5.15.0-73-generic #80-Ubuntu SMP Mon May 15 15:18:26 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
node_exporter version: output of node_exporter --version
node_exporter, version 1.6.1 (branch: HEAD, revision: 4a1b77600c1873a8233f3ffb55afcedbb63b8d84)
build user: root@586879db11e5
build date: 20230717-12:10:52
go version: go1.20.6
platform: linux/amd64
tags: netgo osusergo static_build
node_exporter command line flags
/usr/local/bin/node_exporter --web.listen-address=0.0.0.0:9100 --collector.textfile.directory=/var/lib/prometheus/textfile --collector.buddyinfo --collector.processes --collector.ntp --collector.network_route
node_exporter log output
Are you running node_exporter in Docker?
No
What did you do that produced an error?
n/a
What did you expect to see?
Infiniband metrics, and node_scrape_collector_success would return 1
What did you see instead?
node_scrape_collector_success returns 0
More info
This seems like it might be a bug in the procfs package, since with irdma loaded, there are irdmaX devices in /sys/class/infiniband:
# ls -l /sys/class/infiniband/
total 0
lrwxrwxrwx 1 root root 0 Jul 25 01:25 irdma0 -> ../../devices/pci0000:80/0000:80:05.0/0000:82:00.0/infiniband/irdma0
lrwxrwxrwx 1 root root 0 Jul 25 01:25 irdma1 -> ../../devices/pci0000:80/0000:80:05.0/0000:82:00.1/infiniband/irdma1
lrwxrwxrwx 1 root root 0 Jul 25 01:25 mlx5_0 -> ../../devices/pci0000:15/0000:15:01.0/0000:16:00.0/0000:17:00.0/0000:18:00.0/infiniband/mlx5_0
lrwxrwxrwx 1 root root 0 Jul 25 01:25 mlx5_1 -> ../../devices/pci0000:24/0000:24:01.0/0000:25:00.0/0000:26:00.0/0000:27:00.0/0000:28:00.0/0000:29:00.0/infiniband/mlx5_1
Once I rmmod irdma these devices (irdma0, irdma1) no longer show up in /sys/class/infiniband, and node_exporter begins emitting infiniband metrics, and node_scrape_collector_success returns 1 as expected.