2 - Kubernetes Concepts

Question 1

What is the purpose of each software below?

Minikube
MicroK8s
Kubeadm

Answer 1

• Minikube and MicroK8s are for installation in developer environments, such as notebooks.
• Kubeadm is used to install kubernete in large-scale environments or cloud providers.

Question 2

What is a POD ?

Answer 2

POD is a single instance of an application. It is the smallest object that can be created in Kubernetes.

Question 3

An application configured in a POD within Kubernetes. The number of users accessing this application is growing and we need to increase scalability. How can I do this ?

Answer 3

We created a new POD running the same instance of the application and now we have two PODs running the same instance of the application. We should never create a new instance of the application in the same POD.

Question 4

When should we create more than one container within a POD?

Answer 4

When we have an application that performs some type of task to support our main application.

Question 5

Which command is used to create a POD?

Answer 5

kubectl run name –image image_container

Question 6

Which command is used to see the PODs running?

Answer 6

kubectl get pods

Question 7

Which command is used to see more details of a POD running?

Answer 7

kubectl describe pod name

or

kubectl get pods -o wide