Feature request: ignore /snap mountpoint in filesystem collector

[paol]

Linux systems that run snap apps (which modern Ubuntu does by default) mount read-only loop devices under /snap. There is at least one mount per snap application, which causes lots of spam in all sorts of systems that look at mounted filesystems, node_exporter being no exception.

Since there is nothing of interest to see in these filesystems it would be nice if /snap were added to the default value of collector.filesystem.ignored-mount-points.

EDIT: It might be a possibility to make a broader exclusion and ignore all mounts of type squashfs. This would cover snap apps as a side effect. I haven't been able to think of a scenario where you would want to monitor this type of mount, if no one else can either then this may be a more general solution.

[discordianfish]

Makes sense.

[brian-brazil]

This was already done in #1104

[paol]

Oh, sorry. Closing this.

When I customized my collector.filesystem.ignored-fs-types option I copied the default value from before that change was merged. I'm not sure how I managed that since it was just a couple of weeks ago.