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Examining QoS in Action

Examining QoS in Action

In this lesson, we will get practical and see QoS in action.

Checking QoS with Initial Definition

Let’s take a look which QoS our go-demo-2-db Pod got assigned.

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kubectl describe pod go-demo-2-db

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

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...
Containers:
  db:
    ...
    Limits:
      cpu:    100m
      memory: 100Mi
    Requests:
      cpu:    10m
      memory: 50Mi
...
QoS Class:       Burstable
...

The Pod was assigned Burstable QoS.

Its limits are different from requests, so it did not qualify for Guaranteed QoS.

Since its resources are set, and it is not eligible for Guaranteed QoS, Kubernetes assigned it the second best QoS. ...

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