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

# Sequential Breakdown of the Process
The sequence of events that transpired with the `kubectl create -f rs/go-demo-2.yml` command is as follows.

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

2. The controller is watching the API server for new events, and it detected that there is a new ReplicaSet object.
3. The controller creates two new pod definitions because we have configured replica value as 2 in `rs/go-demo-2.yml` file.
4. Since the scheduler is watching the API server for new events, it detected that there are two unassigned Pods.
5. The scheduler decided which node to assign the Pod and sent that information to the API server.
6. Kubelet is also watching the API server. It detected that the two Pods were assigned to the node it is running on.
7. Kubelet sent 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 `api` image. So in total four containers are created.
8. Finally, Kubelet sent a request to the API server notifying it that the Pods were created successfully.

In this lesson, we will look into the occurrence of sequential events to create replicas of a Pod.