The metrics of kubectl top nodes is not correct?
12/14/2018
I try to get CPU/Memory usage of the k8s Cluster Nodes via metrics-server API, but I found the returned values of metrics-server is lower than actual used CPU/Memory.
The output of kubectl top command : kubectl top nodes
The following is the output of the free command, from which you could see the memory usage is great than 90%.
Why the difference is so high?
-- zulv
kubernetes
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12/14/2018
kubectl top nodes is reflecting the actual usage of your Kubernetes Nodes.
For example:
Your node has 60GB memory and you actually use 30GB so it will be 50% of usage.
But you can request for example:
100 MB and have a limit 200MB memory.
This doesn't mean you only consume 0.16% (100 / 60000) memory, but the amount of your configuration.
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