A Practical Guide to Kubernetes/

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Allocating Insufficient Resource than the Actual Usage

Allocating Insufficient Resource than the Actual Usage

Explore what happens when we allocate insufficient resources than required by an application.

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Allocating Insufficient Resources

Let’s look at a slightly modified version of the go-demo-2 definition as 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.

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apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-demo-2-db
spec:
  ...
  template:
    ...
    spec:
      containers:
      - name: db
        image: mongo:3.3
        resources:
          limits:
            memory: 20Mi
            cpu: 0.5
          requests:
            memory: 10Mi
            cpu: 0.3

The memory limit is set to 20Mi and the request to 10Mi. Since we already know from Metrics Server’s data that MongoDB ...