node_exporter
                                
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                        as a user, i'd like btrfs subvolume metrics
Host operating system: output of uname -a
➜ uname -a | sed -e "s/${HOST}/HOSTNAME/"
Linux HOSTNAME 6.3.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 14 Jun 2023 20:10:31 +0000 x86_64 GNU/Linux
node_exporter version: output of node_exporter --version
➜ prometheus-node-exporter --version
node_exporter, version 1.6.0 (branch: tarball, revision: 1.6.0)
  build user:       someone@builder
  build date:       20230530-16:06:09
  go version:       go1.20.4
  platform:         linux/amd64
  tags:             unknown
Currently, the btrfs metrics do not include subvolume utilization information. It would be fantastic if the subvolume ID could be added as a label so that things like showing per-subvolume disk utilization were possible.