Module 2 Understanding Kubernetes Architecture

Question 1

In Kubernetes, each node is made up of what pairs?

Answer 1

kube-proxy and kubelet

Each node is made up of a kubelet and kube-proxy.

Question 2

What is Kubernetes?

Answer 2

Kubernetes is an open source software, a container orchestration platform and a tool that facilitates declarative management.

Question 3

What component is part of the Kubernetes control plane?

Answer 3

etcd

The etcd is part of the Kubernetes control plane.

Question 4

What are some of the benefits of an IBM Cloud Kubernetes service?

Answer 4

Some of the benefits include image security compliance with Vulnerability Advisor, support for multizone clusters, continuous monitoring of the cluster health, and highly available masters.

Question 5

What is considered a Kubernetes object?

Answer 5

Namespace

Namespace is a Kubernetes object.

Question 6

What occurs when adding more VMs to a cluster to increase capacity?

Answer 6

Scale out

Scaling out occurs when adding more VMs to a cluster.

Question 7

Replicating a pod serves to scale an application in what way?

Answer 7

Horizontally

Replicating a Pod serves to scale an application horizontally.

Question 8

What is the purpose of vertical scaling?

Answer 8

Vertical scaling is used to add capacity when resizing a VM.

Question 9

What does “create” do in this command?

kubectl create –f nginx.yaml

Answer 9

The “create” command creates an object using the details in the nginx.yaml file.

Question 10

What Kubernetes object represents a single instance of processes running in a container?

Answer 10

Pod

A Pod represents a single instance of processes running in a container.