What is different between cpu vs. requests.memory, pods vs. count/pods
I think you are confusing Compute Resource Quota with Object Count Quota
- Compute Resource Quota
The total sum of compute resources that can be requested in a given namespace.
requests.memory - for instance you can set in this way the total guaranteed amount of memory for Dev team in their dev namespace taking into account all Pods' containers.
- Object Count Quota
The total number of generic objects that can exist in the namespace.
count/services or pods - possible use case, limit the maximum number of pods per namespace, quoting the official documentation:
You might want to set a pods quota on a namespace to avoid the case where a user creates many small pods and exhausts the cluster’s supply of Pod IPs.