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Practice Test - Rolling Updates and Rollback

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Solutions to practice test - rolling updates and rollback

• We have deployed a simple web application. Inspect the PODs and the Services

  ``` $ kubectl get pods $ kubectl get services ```

• What is the current color of the web application?

  ``` Access the web portal ```

• Execute the script at /root/curl-test.sh.

• Run the command ‘kubectl describe deployment’ and look at ‘Desired Replicas’

  ``` $ kubectl describe deployment ```

• Run the command ‘kubectl describe deployment’ and look for ‘Images’

  ``` $ kubectl describe deployment ```

• Run the command ‘kubectl describe deployment’ and look at ‘StrategyType’

  ``` $ kubectl describe deployment ```

• If you were to upgrade the application now what would happen?

  ``` PODs are upgraded few at a time ```

• Run the command ‘kubectl edit deployment frontend’ and modify the required feild

  ``` $ kubectl edit deployment frontend ```

• Execute the script at /root/curl-test.sh.

• Look at the Max Unavailable value under RollingUpdateStrategy in deployment details

  ``` $ kubectl describe deployment ```

• Run the command ‘kubectl edit deployment frontend’ and modify the required field. Make sure to delete the properties of rollingUpdate as well, set at ‘strategy.rollingUpdate’.

  ``` $ kubectl edit deployment frontend ```

• Run the command ‘kubectl edit deployment frontend’ and modify the required feild

  ``` $ kubectl edit deployment frontend ```

• Execute the script at /root/curl-test.sh.