Exploring the effects of discrepancies between resource specifications and resource usage

Let's take a look at a slightly modified version of the go-demo-2 definition:

cat res/go-demo-2-insuf-mem.yml  

When compared with the previous definition, the difference is only in resources of the db container in the go-demo-2-db Deployment.

The output, limited to the relevant parts, is as follows:

apiVersion: apps/v1beta2 
kind: Deployment 
metadata: 
  name: go-demo-2-db 
spec: 
  ... 
  template: 
    ... 
    spec: 
      containers: 
      - name: db 
        image: mongo:3.3 
        resources: 
          limits: 
            memory: 10Mi 
            cpu: 0.5 
          requests: 
            memory: 5Mi 
            cpu: 0.3 

The memory limit is set to 10Mi and the request to 5Mi. Since we already know from Heapster's data that MongoDB requires around 38Mi, memory resources ...

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