Challenge ·Easy

Guaranteed on Paper

lefteris alexakis
by  lefteris alexakis · on
Kubernetes
A Pod has two containers, and each one sets requests equal to limits, the textbook recipe for Guaranteed. Yet the Pod is Burstable. Figure out why, and bring it to the Guaranteed QoS class.
#qos#resources#scheduling

A Deployment named gateway runs a Pod with two containers, proxy and app. Look closely: each container sets requests equal to its limits for CPU and memory, which is exactly what Guaranteed is supposed to require.

And yet:

kubectl get pod -l app=gateway -o jsonpath='{.items[0].status.qosClass}'

...the Pod is Burstable. Find out why, and make it Guaranteed.

Hint

Resources can be defined in two places: on each container, and at the Pod level. Both feed into the QoS class, and one has priority over the other.

Once the Pod is Ready and reports qosClass: Guaranteed, the challenge is complete.

How to Author Challenges on iximiuz Labs

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Install labctl CLI

curl -sf https://labs.iximiuz.com/cli/install.sh | sh

This will download and install the latest version of the labctl CLI. You only need to do this once per workstation.

Authorize labctl

labctl auth login

This will open a browser window asking you to authorize labctl to access your account. You need to do it after a fresh install of labctl and repeat it whenever the auth session expires.

Pull challenge content

labctl content pull challenge kubernetes-guaranteed-qos-pod-level-55b97730

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Stream your changes

labctl content push -fw challenge kubernetes-guaranteed-qos-pod-level-55b97730

Run this command in a separate terminal to continuously upload your changes to the server while editing the challenge in your favorite text editor or IDE.

You can also use labctl to create, list, and delete your content. Learn more about the available commands: labctl content --help

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