node_exporter in docker: mount points from container shown (not from host)

[daberlin]

Bug Report

Describe the bug I run fluentbit inside a docker container with node_exporter enabled. Two volumes are mounted: volumes: - /proc:/host/proc:ro - /sys:/host/sys:ro

FB config: [INPUT] name node_exporter_metrics tag metrics scrape_interval 2 path.procfs /host/proc path.sysfs /host/sys

[OUTPUT] name prometheus_exporter match metrics host 0.0.0.0 port 2021

Prometheus shows only mountpoints from inside the container, bot even the rootfs. Are we missing an option "path.rootfs" or are there hardcoded paths?

To Reproduce

• Rubular link if applicable:
• Example log message if applicable:

node_filesystem_avail_bytes{compose_project="sechub-develop", device="/dev/root", fstype="ext4", instance="logging:2021", job="fluent-bit", mountpoint="/etc/hostname"}

--> /etc/hostname is not mounted on the host

• Steps to reproduce the problem:

Expected behavior I would expect to see the host's mountpoints.

Screenshots n/a

Your Environment

• Version used: Fluent Bit v2.2.2
• Configuration:
• Environment name and version (e.g. Kubernetes? What version?): docker v24
• Server type and version: Azure VM
• Operating System and version: Ubuntu server 22.04
• Filters and plugins: see above

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This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 5 days. Maintainers can add the exempt-stale label.

[github-actions[bot]]

This issue was closed because it has been stalled for 5 days with no activity.

[MrMMorris]

might be related to the bug I just opened https://github.com/fluent/fluent-bit/issues/9092