Jump right into Kubernetes development with career-focused lessons and hands-on practice.

DevOps for Developers

Kubernetes is a powerful container management tool that's taking the world by storm. This detailed course will help you master it.

In this course, you'll start with the fundamentals of Kubernetes and what the main components of a cluster look like. You'll then learn how to use those components to build, test, deploy, and upgrade applications, as well as how to achieve state persistence once your application is deployed. You'll also learn how to secure your deployments and manage resources, which are crucial DevOps skills.

By the time you're done, you'll have a firm grasp on what Kubernetes is, as well as the skills to deploy your own clusters and applications with confidence.

A Practical Guide to Kubernetes

# Creating ConfigMap using literals

Hopefully, even when our applications need different configurations to work in distinct clusters, the differences are limited. Often, they should be limited to only a few key/value entries. In such cases, it might be easier to create ConfigMaps using `--from-literal`.

Let’s look at an example:

kubectl create cm my-config \
    --from-literal=something=else \
    --from-literal=weather=sunny

kubectl get cm my-config -o yaml

The output of the latter command is as follows (metadata is removed for brevity):

Learn how to inject configurations from key/value literals.

Injecting Configurations from Key/Value Literals

Creating ConfigMap using literals