Kubernetes is a powerful tool. It can help you manage complex applications and provide you with the ability to easily automate tasks involved in managing them. In this course, we will start exploring Kubernetes from a beginner's standpoint. We will discuss what Kubernetes is and what it does, and we will work with some of the basic functionality of Kubernetes hands-on. We will build a simple Kubernetes cluster. We will also deploy a sample microservice application to the cluster in order to explore how Kubernetes can help easily manage such applications.

A Practical Guide to Kubernetes

## Creating a ConfigMap from Multiple Files
Let's see what happens when we execute the commands that follow.

kubectl create cm my-config \
    --from-file=cm/prometheus-conf.yml \
    --from-file=cm/prometheus.yml

kubectl create -f cm/alpine.yml

kubectl exec -it alpine -- \
    ls /etc/config


We created a ConfigMap with two files, and we created the same Pod based on the `alpine.yml` definition. Finally, we output the list of files from the `/etc/config` directory inside the Pod's only container. The **output** of the latter command is as follows.

# Creating a ConfigMap from Multiple Files
Let's see what happens when we execute the commands that follow.

In this lesson, first, we will learn to inject configuration from multiple files and then from a directory.

Injecting Configurations from Multiple Files

Creating a ConfigMap from Multiple Files