Some mounts are not shown in the list

[keckj]

My field disk is mounted to /mnt/fields/0 and this mountpoint does not show up in mounts, and thus I cannot track disk usage.
I imagine I have to tweak something in grafana/dashboards/Chia.json but I cannot determine where $mounts is defined.

[retzkek]

The variables are defined in the dashboard settings (click the gear icon in the upper-right corner). The variable is populated when the dashboard is loaded from the labels on the node_filesystem_size metric in Prometheus.

It's likely that the node exporter isn't seeing the mounts. Are you running it in a container? What platform are you on?

[keckj]

My host is an ubuntu 20.04, and I run it with docker-compose up -d. In the prometheus node_exporter docs it is said that "any non-root mount points you want to monitor will need to be bind-mounted into the container" so I suppose I just have to modify the docker-compose.yml to add mount points !

[retzkek]

Oh, I thought it picked up the other mounts by having root bind-mounted into the container. In production I run the exporter natively (sudo apt install prometheus-node-exporter) so I didn't notice that.

[keckj]

Thanks it works with the native exporter. I had to give read and execute rights on the mount to the prometheus user.
This can also be achieved by modifying user/group in /etc/systemd/system/multi-user.target.wants/prometheus-node-exporter.service. Node exporter options can be edited in /etc/default/prometheus-node-exporter. This file can be used to tweak collector.diskstats.ignored-devices and collector.filesystem.ignored-mount-points.

[retzkek]

Thanks, that's a helpful tip (personally I just have my Chia volumes set chmod 777 since I'm lazy 😃). I'll link to this issue from the README.