Container detection returns null on cgroups v2 / Debian 13 #420
Description
Environment
- OS: Debian 13
- cgroups: v2 (cgroup2fs)
- Docker version: 29.2.1, build a5c7197
- Scaphandre version: 1.0.2
Problem
With scaphandre json --containers -f output.json, all consumers have container: null in the JSON output. The same workflow worked on Debian 12.
Cgroup path example
Container processes have cgroup paths like:
0::/system.slice/docker-cb6970b7e0a606b4d7d25f4f0ef37a51efcd99a57c56d95c0a70bf645151bcd8.scope
Steps to reproduce
- Run a Docker container:
docker run -d --name test-container - Run Scaphandre:
sudo scaphandre json --containers -f output.json(let it run a few seconds, then Ctrl+C) - Inspect output:
jq '.[0].consumers[:3]' output.json - Observe: all consumers have
"container": null
Related
- Issue containers option does not work with Linux containers #257
- Same benchmark setup works with Scaphandre's container field on Debian 12