Setting up a local cluster (minikube, kind) in Kubernetes - Practice Exercises

Challenge - 5 Problems

💻 Command Output

intermediate

Minikube Start Command Output

What is the expected output when you run minikube start on a system with Docker installed and no existing cluster?

Kubernetes

minikube start

A

😄  minikube v1.30.1 on Ubuntu 22.04
✨  Using virtualbox driver
❌  VirtualBox is not installed

B Error: minikube: command not found

C

😄  minikube v1.30.1 on Ubuntu 22.04
❌  Unable to start cluster: Docker daemon not running

D

😄  minikube v1.30.1 on Ubuntu 22.04
✨  Using the docker driver based on user configuration
👍  Starting control plane node minikube in cluster minikube
🐳  Preparing Kubernetes v1.27.3 on Docker 24.0.5
🚜  Pulling base image ...

🏄  Done! kubectl is now configured to use "minikube"

💡 Hint

Think about what happens when minikube starts successfully with Docker driver.

When minikube starts successfully with Docker driver, it shows messages about using Docker, preparing Kubernetes, and ends with a success message configuring kubectl.

🧠 Conceptual

intermediate

Kind Cluster Configuration File Purpose

What is the main purpose of a kind cluster configuration YAML file?

A To define the Kubernetes version, node roles, and networking settings for the local cluster

B To configure the minikube VM resources like CPU and memory

C To specify Docker container images to be deployed inside the cluster

D To set up the kubeconfig file location for kubectl

💡 Hint

Think about what you control when creating a kind cluster with a config file.

Kind uses the config file to define cluster details like Kubernetes version, how many nodes, their roles, and network settings.

❓ Troubleshoot

advanced

Diagnosing Minikube Docker Driver Failure

You run minikube start --driver=docker but get the error: Docker daemon not running. What is the most likely cause?

A Minikube does not support Docker driver on your OS

B Your kubectl version is incompatible with minikube

C Docker service is not running on your machine

D You need to install VirtualBox to use Docker driver

💡 Hint

Check if Docker is running before starting minikube with Docker driver.

The error means minikube cannot connect to Docker because the Docker service is stopped or not installed.

🔀 Workflow

advanced

Kind Cluster Creation Steps

Which sequence correctly describes the steps to create and use a kind cluster?

A 1,2,3,4

B 2,1,3,4

C 1,3,2,4

D 2,3,1,4

💡 Hint

Think about what you do first before creating the cluster.

You optionally write a config file, then create the cluster, check it is running, then deploy apps.

✅ Best Practice

expert

Best Practice for Persistent Storage in Minikube

What is the best practice to enable persistent storage for applications running in a minikube cluster?

A Store data inside container writable layers

B Use minikube's built-in hostPath provisioner with a PersistentVolume and PersistentVolumeClaim

C Use ephemeral emptyDir volumes for all storage needs

D Install a cloud provider storage plugin inside minikube

💡 Hint

Think about how to keep data safe even if pods restart in minikube.

Minikube supports hostPath volumes which map to local disk, allowing data to persist beyond pod lifecycle.