Ignore notFound error when collect from pid cgroup #333
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When `pids.current` or `pids.max` not exist in cgroup root (/sys/fs/cgroup/pids/) collect_metrics will print out error level log "...unable to read a control group file /sys/fs/cgroup/pids/./ pids.current..." continually, this commit will ignore these not found errors. As a supplement,if or not set pids.current file in cgroup controller root directory decided by `CFTYPE_NOT_ON_ROOT` flag, in many commen environment it is default to enabled. And as a contrast, go version code will ignore all not found error when collect cgroupv1 metrics: https://github.com/containerd/containerd/blob/b67a788072abd9671804b1ef1a719e3742867d1c/runtime/v2/runc/task/service.go#L625 Co-authored-by: Yukiteru <[email protected]> Signed-off-by: Lei Liu <[email protected]>
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mxpv
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Nov 5, 2024
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When
pids.currentorpids.maxnot exist in cgroup root (/sys/fs/cgroup/pids/) collect_metrics will print out error level log "...unable to read a control group file /sys/fs/cgroup/pids/./ pids.current..." continually, this commit will ignore these not found errors.As a supplement,if or not set pids.current file in cgroup controller root directory decided by
CFTYPE_NOT_ON_ROOTflag, in many commen environment it is default to enabled. And as a contrast, go version code will ignore all not found error when collect cgroupv1 metrics: https://github.com/containerd/containerd/blob/b67a788072abd9671804b1ef1a719e3742867d1c/runtime/v2/runc/task/service.go#L625