Why Does CCE Display Node Disk Usage Inconsistently with Cloud Eye?

Symptom

The disk usage of a node on the CCE cluster details page is higher than 80%, but the disk usage displayed on the Cloud Eye console is lower than 40%.

After fault locating on the node, it is found that the usage of a PVC reaches 92%. After the disk is cleared, the disk usage on CCE is the same as that on Cloud Eye.

How does node monitoring work on the cluster console? Does it only report the maximum disk usage data?

Answer

In CCE cluster monitoring, the disk usage metric reflects the disk with the highest usage on the node.