Error on statfs() system call for \"net:[4026533460]\": no such file or directory

[netmonk]

Host operating system: output of uname -a

3.10.0-327.36.3.el7.x86_64

node_exporter version: output of node_exporter --version

node_exporter, version 0.15.2 (branch: HEAD, revision: 98bc649)
build user: root@d5c4792c921f
build date: 20171205-14:50:53
go version: go1.9.2

node_exporter command line flags

none

Are you running node_exporter in Docker?

no

What did you do that produced an error?

running node_exporter

What did you expect to see?

nothing

What did you see instead?

Dec 29 15:20:02 toto node_exporter: time="2017-12-29T15:20:02+01:00" level=error msg="Error on statfs() system call for \"net:[4026533460]\": no such file or directory" source="filesystem_linux.go:57" Dec 29 15:20:02 toto node_exporter: time="2017-12-29T15:20:02+01:00" level=error msg="Error on statfs() system call for \"net:[4026533460]\": no such file or directory" source="filesystem_linux.go:57"

toto:/proc# grep net /proc/mounts cgroup /sys/fs/cgroup/net_cls cgroup rw,nosuid,nodev,noexec,relatime,net_cls 0 0 tmpfs /run/netns tmpfs rw,nosuid,nodev,mode=755 0 0 proc net:[4026533460] proc rw,nosuid,nodev,noexec,relatime 0 0 proc net:[4026533460] proc rw,nosuid,nodev,noexec,relatime 0 0

In lines 28/29 of prometheus/node_exporter/blob/master/collector/filesystem_linux.go you define excluded filesystem type and excluded mount point but those proc net:[4026533460] proc are not catched by both regexp. with lead to this error message in logs.

[netmonk]

guess regexp line 29 shoudl be replaced by "^((sys|auto)fs|proc)$"

[grobie]

Sounds right, the type of the proc filesystem in Linux is proc and not procfs. Do you want to send a PR?

[netmonk]

well beware
in freebsd it is procfs on linux it is proc

im not fluent enough in go to submit any PR. I prefer real expert to write the patch :)
I can imagine the original code was dev on a freebsd plateform

[grobie]

I'd vote for a simple regex list then ^(autofs|proc|procfs|sysfs)$ or maybe ^(autofs|proc(fs)?|sysfs)$, but let's keep it simple in general.

[micemuni]

@grobie @netmonk For me getting same but let me know where i have to modify these changes.? (proc filesystem)

[micemuni]

@grobie @netmonk i am running node exporter as docker service in Linuxkit VM. Once i reboot the server then Node exporter should restart after server reboot. But here Node exporter fails to start after instance reboot.

[XSHui]

@SuperQ @netmonk
I used

--collector.filesystem.ignored-mount-points="^/(sys|proc|dev|rootfs/var/lib/docker|rootfs/run/docker/netns)($|/)"

still get error

{"log":"time=\"2019-09-05T09:10:06Z\" level=error msg=\"Error on statfs() system call for \\\"net:[4026533829]\\\": no such file or directory\" source=\"filesystem_linux.go:57\"\n","stream":"stderr","time":"2019-09-05T09:10:06.442841008Z"}

why ?

node-exporter:v0.15.2