An open-data node fills /var/lib/containerd and workloads fail with ephemeral-storage pressure. What should the administrator treat as a first-class usage concern?
Select an answer to reveal the explanation.
Short Explanation
Disk is a resource too—writable layers and emptyDirs pile up under the runtime until the node wheezes. Watch ephemeral storage like you watch CPU and memory.
Full Explanation
Kubernetes tracks ephemeral storage as a schedulable and evictable resource. Pressure under paths such as the container runtime's data directory often comes from image layers, container writable layers, and emptyDir volumes. Administrators should monitor and constrain ephemeral storage rather than attributing the symptom only to etcd keys, ClusterIP pools, or Ingress certificate dates.