Installing charts in Kubernetes - Practice Exercises

Challenge - 5 Problems

💻 Command Output

intermediate

Output of Helm install command with missing chart

What is the output when you run helm install myapp missing-chart if the chart named missing-chart does not exist in any configured repository?

Kubernetes

helm install myapp missing-chart

A Release "myapp" has been installed successfully

B Warning: chart deprecated but installed anyway

C Error: chart "missing-chart" not found in helm repositories

D Error: failed to download "missing-chart" (hint: check your network)

💡 Hint

Think about what happens if Helm cannot find the chart locally or in any repo.

When Helm cannot find the specified chart in any configured repository, it returns an error indicating the chart is not found. It does not install anything.

❓ Configuration

intermediate

Correct Helm install command with custom values file

Which Helm install command correctly installs the chart nginx with a custom values file named custom-values.yaml?

A helm install nginx ./nginx --set-file custom-values.yaml

B helm install nginx ./nginx --values custom-values.yaml

C helm install nginx ./nginx -c custom-values.yaml

D helm install nginx ./nginx -f custom-values.yaml

💡 Hint

The flag for specifying a values file is either -f or --values.

The correct flag to specify a custom values file in Helm is --values or its short form -f. Option D uses the short form correctly.

🔀 Workflow

advanced

Order of steps to install a Helm chart from a new repository

What is the correct order of commands to add a new Helm repository named myrepo with URL https://example.com/charts and then install the chart mychart from it?

A 3,1,2,4

B 1,2,3,4

C 1,3,2,4

D 2,1,3,4

💡 Hint

You must add the repo, update local cache, then install the chart.

First, add the repo with helm repo add. Then update the repo cache with helm repo update. After that, install the chart using the repo name prefix. Finally, you can check pods with kubectl.

❓ Troubleshoot

advanced

Reason for Helm install failure with 'cannot re-use a name that is still in use' error

You run helm install myapp ./mychart but get the error cannot re-use a name that is still in use. What is the most likely cause?

A A release named 'myapp' already exists in the cluster

B The chart directory './mychart' is missing the Chart.yaml file

C The Kubernetes cluster is not reachable

D The Helm client version is incompatible with the server

💡 Hint

Think about what the error message says about the release name.

The error means a Helm release with the name 'myapp' already exists in the cluster. Helm does not allow installing a new release with the same name unless you upgrade or uninstall the existing one.

✅ Best Practice

expert

Best practice for installing Helm charts in production environments

Which practice is considered best for installing Helm charts in a production Kubernetes environment?

A Use a CI/CD pipeline to automate chart installation with reviewed and tested values files

B Manually run helm install commands on production nodes via SSH

C Install charts directly from public repositories without reviewing values

D Always use the --force flag to overwrite existing releases without checks

💡 Hint

Think about safety, repeatability, and automation in production.

Using a CI/CD pipeline to automate Helm chart installation with reviewed and tested values files ensures consistency, safety, and traceability in production deployments.