Rook discover daemon cannot see any disks

[bootc]

Is this a bug report or feature request?

• Bug Report

Deviation from expected behavior:
Rook discover daemon cannot see any disks.

Expected behavior:
Rook discover daemon should be able to discover available devices.

How to reproduce it (minimal and precise):
Rook 1.8.x now runs discover as non-root, which means it cannot correctly list available devices.

File(s) to submit:
Example rook-discover-xxxxx logs:

2021-12-22 10:11:20.127888 I | rookcmd: starting Rook v1.8.1 with arguments '/usr/local/bin/rook discover --discover-interval 60m --use-ceph-volume'
2021-12-22 10:11:20.128011 I | rookcmd: flag values: --discover-interval=1h0m0s, --help=false, --log-level=INFO, --operator-image=, --service-account=, --use-ceph-volume=true
2021-12-22 10:11:20.130396 I | rook-discover: updating device configmap
2021-12-22 10:11:20.146452 W | inventory: skipping device "sda". exit status 2
2021-12-22 10:11:20.167358 W | inventory: skipping device "sdb". exit status 2
2021-12-22 10:11:20.174268 W | inventory: skipping device "sdc". exit status 2
[...]
2021-12-22 10:11:20.234213 I | rook-discover: localdevices: "sda1"
2021-12-22 10:11:20.234219 I | rook-discover: Getting ceph-volume inventory information
2021-12-22 10:11:24.046356 I | rook-discover: available devices: []
2021-12-22 10:11:24.083163 I | rook-discover: using the regular expressions ["(?i)dm-[0-9]+" "(?i)rbd[0-9]+" "(?i)nbd[0-9]+"]

Environment:

• OS (e.g. from /etc/os-release): Debian GNU/Linux 11 (bullseye)
• Kernel (e.g. uname -a): Linux frost 5.15.0-2-amd64 #1 SMP Debian 5.15.5-1 (2021-11-26) x86_64 GNU/Linux
• Cloud provider or hardware configuration: on-prem bare metal
• Rook version (use rook version inside of a Rook Pod): rook: v1.8.1 go: go1.16.12
• Storage backend version (e.g. for ceph do ceph -v): ceph version 14.2.21 (5ef401921d7a88aea18ec7558f7f9374ebd8f5a6) nautilus (stable)
• Kubernetes version (use kubectl version): v1.22.5+rke2r1
• Kubernetes cluster type (e.g. Tectonic, GKE, OpenShift): RKE2
• Storage backend status (e.g. for Ceph use ceph health in the Rook Ceph toolbox): HEALTH_OK

[leseb]

Probably a dup of #9493