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

# Step by step process
The sequence of events that occur with the `kubectl create -f go-demo-2.yml` command is as follows:

1. The Kubernetes client (`kubectl`) sends a request to the API server requesting the creation of a ReplicaSet defined in the `go-demo-2.yml` file.

2. The controller is watching the API server for new events, and it detects that there is a new ReplicaSet object.
3. The controller creates two new Pod definitions because we have configured the replica value as 2 in `go-demo-2.yml` file.
4. Because the scheduler is also watching the API server for new events, it detects that there are two unassigned Pods.
5. The scheduler decides which node to assign the Pod to and sends that information to the API server.
6. The kubelet is also watching the API server. It detects that the two Pods are assigned to the node it is running on.
7. The kubelet sends requests to Docker requesting the creation of the containers that form the Pod. In our case, the Pod defines two containers based on the `mongo` and the `api` image. So in total, four containers are created.
8. Finally, the kubelet sends a request to the API server notifying it that the Pods are created successfully.

Learn about the sequence of events involved in the process of creating a ReplicaSet.  

Sequential Breakdown of the Process

Learn about the sequence of events involved in the process of creating a ReplicaSet.