feat: add fs io cost metrics #3782
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dims
approved these changes
Dec 16, 2025
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What?
Adds support for Linux kernel IOCost controller metrics (usage, wait, indebt, indelay) to cAdvisor, exposed via Prometheus.
Why?
IOCost is a cgroup v2 IO cost-based QoS controller that provides fine-grained IO resource management. Exposing these metrics enables users to:
How?
github.com/opencontainers/cgroupsfromv0.0.4tov0.0.6(which added IOCost support inopencontainers/cgroups@e313314)
container_fs_io_cost_usage_seconds_totalcontainer_fs_io_cost_wait_seconds_totalcontainer_fs_io_cost_indebt_seconds_totalcontainer_fs_io_cost_indelay_seconds_total