Discover how to build, deploy, scale, and manage Kubernetes. Gain insights into architecture, pods, deployments, services, and run real-world projects to solidify your skills.

kubernetes.tar.gz

kubernetes

port-30001

port-3000

port-4567

port-8001

Port-3001

Port-3001-v1

Kubernetes in Practice is your one-stop shop for learning how to build, deploy, scale, and manage Kubernetes in a step-by-step process.

You will learn all the most important concepts including: architecture, pods, deployments, services, ingress, and a whole lot more. Once you have the fundamentals out of the way, you will get the opportunity to put your skills to work in a project where you will create and run an application in a real Kubernetes cluster.

By the time you finish this course, you will have complete confidence when it comes to deploying and managing kubernetes clusters.

Kubernetes in Practice

Before we start talking about how a service works and all the different types of services we can have, let's see a simple service in action to understand what it is doing.

apiVersion: v1
kind: Service
metadata:
  name: hellok8s-svc
spec:
  type: NodePort
  selector:
    app: hellok8s
  ports:
  - port: 4567
    nodePort: 30001

By now, you should be getting used to the general manifest format. Most of this service definition is quite similar to the pods and deployment manifests we have seen.  
We define a resource with the `Service` kind and give it the name `hellok8s-svc`. In the `spec` section we are defining three things: the service type, the selector, and the ports.



We have a few different types of Services in Kubernetes, and we will talk about them and when to use each one soon. But for this example, we are just using a `NodePort` that will open a port on the worker node to receive requests (similarly to what `port-forward` was doing).
Then in the `selectors` section, we need to tell the service which pods are behind it. In the same way we did for Deployments, we use labels for that. Here, we are saying that any pod that has the label `app` with the value `hellok8s` can receive the requests sent to this Service.
And lastly, we define the port mapping. Here, we are saying that we want to open the port `30001` and send all the requests received on that port to the pod's port `4567` (that is where our application is listening).

Learn how we can use services in Kubernetes with a quick example.

Before We Begin

What Kubernetes Brings to the Table

Kubernetes Architecture

Pods

Deployments

Services

Deploying a Web Application over Kubernetes

Ingress

Configuring Applications with Configmaps

Using Secrets for Sensitive Configs

Running Jobs

Fault-Tolerant Web Hosting on Kubernetes

Organizing Resources with Namespaces

Managing Containers Resource Usage

Understanding the Kubeconfig File

Kubernetes IRL

Appendix

Wrap Up!

A Quick Example