This seems like the norm at the moment on k8s workers:
Jan 8 18:25:42 tools-worker-1020 prometheus-node-exporter[681]: time="2018-01-08T18:25:42Z" level=error msg="Error on statfs() system call for "/var/lib/docker/devicemapper/mnt/de04bd2ed23f8db495db5c818c07b7b31ebe47426bba4f5f6668e5560d0b5e43": permission denied" source="filesystem_linux.go:57"
It's spamming the logs hard.
Looks like there's another error related to another mount point:
Jan 11 15:47:46 tools-worker-1020 prometheus-node-exporter[681]: time="2018-01-11T15:47:46Z" level=error msg="Error on statfs() system call for "/run/docker/netns/c6408cb6676f": permission denied" source="filesystem_linux.go:57" Jan 11 15:47:46 tools-worker-1020 prometheus-node-exporter[681]: time="2018-01-11T15:47:46Z" level=error msg="Error on statfs() system call for "/var/lib/docker/devicemapper/mnt/dbac64c29d0f75cb2aca56b2e8084d8be74eb95c0053df3ace3a6f50338e19c3": permission denied" source="filesystem_linux.go:57"
Since neither of these are interesting I think we should ignore them with these options:
-collector.filesystem.ignored-fs-types string Regexp of filesystem types to ignore for filesystem collector. (default "^(sys|proc|auto)fs$") -collector.filesystem.ignored-mount-points string Regexp of mount points to ignore for filesystem collector. (default "^/(sys|proc|dev)($|/)")
Change 404324 had a related patch set uploaded (by Filippo Giunchedi; owner: Filippo Giunchedi):
[operations/puppet@production] prometheus: allow override of fs-related node-exporter options
Change 404324 merged by Filippo Giunchedi:
[operations/puppet@production] prometheus: allow override of fs-related node-exporter options
Change 404430 had a related patch set uploaded (by Filippo Giunchedi; owner: Filippo Giunchedi):
[operations/puppet@production] prometheus: tweak node_exporter ignored_devices and ignored_fs_types
Change 404430 merged by Filippo Giunchedi:
[operations/puppet@production] prometheus: tweak node_exporter ignored_devices and ignored_fs_types
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