Helm - Interview Questions

 

Beginner-Level Helm Interview Questions

1. What is Helm and why is it used?

Helm is a package manager for Kubernetes that helps you define, install, and upgrade complex Kubernetes applications using reusable charts.

2. What is a Helm chart?

A Helm chart is a collection of files that describe a related set of Kubernetes resources, like Deployments, Services, etc.

3. What are the main components of a Helm chart?

  • Chart.yaml – metadata

  • values.yaml – default values

  • templates/ – Kubernetes manifest templates

  • charts/ – dependency charts

  • templates/_helpers.tpl – helper templates

4. How do you install a chart with Helm?

bash

helm install <release-name> <chart-path>

5. How do you upgrade a release in Helm?

bash

helm upgrade <release-name> <chart-path>

🟡 Intermediate-Level Questions

6. How do you override default values in a Helm chart?

  • Using --set:

    bash
    helm install myapp ./mychart --set image.tag=2.0

  • Or with a custom values.yaml:

    bash

    helm install myapp ./mychart -f custom-values.yaml

7. What is a Helm release?

A release is an instance of a Helm chart running in a Kubernetes cluster.

8. What is the difference between helm install and helm upgrade --install?

  • helm install only installs.

  • helm upgrade --install will install if it doesn’t exist, or upgrade if it does.

9. How do you roll back a Helm release?

bash

helm rollback <release-name> <revision-number>

10. What are Helm hooks?

Hooks allow you to run Kubernetes resources at certain points in the release lifecycle, like pre-install, post-upgrade, etc.

🔴 Advanced-Level Questions

11. What is Helm templating?

Helm uses Go templating to generate Kubernetes YAML files dynamically.

12. What is values.yaml, and how does Helm use it?

It defines default configuration values. Helm templates read values from it to render Kubernetes manifests.

13. How do you manage dependencies in Helm?

Use the Chart.yaml file’s dependencies field and run:

bash

helm dependency update

14. How do you use subcharts?

Subcharts are used for reusability; they’re placed inside the charts/ directory and managed as dependencies.

15. What are some security best practices with Helm?

  • Avoid hardcoding secrets in values.yaml

  • Use sealed secrets or external secret managers

  • Validate templates with helm lint

Comments

Post a Comment

Popular posts from this blog

Helm -Commands

   ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Link :  Getting Started with Helm Chart | Jhooq Helm is a package manager for Kubernetes that simplifies the deployment and management of applications. It uses charts, which are collections of pre-configured Kubernetes resources, to define, package, and install applications on a Kubernetes cluster. Here's a list of commonly used Helm commands: Initialize Helm : helm init or helm repo add stable https://charts.helm.sh/stable : Initializes Helm on your cluster and adds the official Helm stable repository (deprecated since Helm v3). Managing Repositories : helm repo add <name> <url> : Adds a new repository. helm repo list : Lists the available repositories. helm repo update : Updates the local cache of available charts from the configured repositories. Search and Inspect Charts : helm searc...
Read more

Helm - WIth ArgoCD

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  https://www.youtube.com/watch?v=kAJ6Wh1jg34 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Read more

Helm Chart Directory structure

 my-chart/ │ ├── charts/ │   ├── dependency-chart1/ │   └── dependency-chart2/ │ ├── templates/ │   ├── deployment.yaml │   ├── service.yaml │   ├── configmap.yaml │   └── ... │ ├── values.yaml ├── Chart.yaml ├── requirements.yaml ├── values.schema.json ├── README.md └── ...
Read more