Core Concepts

Question 1

What is a Kubernetes Object

Answer 1

A data object that describes the state of a cluster

Question 2

How do I list the available Kubernetes objects

Answer 2

kubectl api-resources -o name

Question 3

What are the two properties of a Kubernets object

Answer 3

spec and status

Question 4

What is the spec of a kubernetes object

Answer 4

It is the desired state of an object - usually supplied by you

Question 5

What is the status of a kubernetes object

Answer 5

The actual status of the object

Question 6

What does the kubectl get command do ?

Answer 6

Returns a list of objects

Question 7

What does the kubectl describe command do ?

Answer 7

Describes the properties of an object

Question 8

What are pods ?

Answer 8

A way of adding containers to a kubernetes cluster

Question 9

Can a pod have more than one container ?

Answer 9

Yes but it is usually one

Question 10

What does the kind directive specify in yml format ?

Answer 10

The type of kubernetes object that you want

Question 11

Name two common yml metadata items ?

Answer 11

name and labels

Question 12

In the spec containers item name three common items?

Answer 12

name image and command

Question 13

What is the command to create a pod ?

Answer 13

kubectl create -f

Question 14

How do you list pods ?

Answer 14

kubectl get pods

Question 15

How do I update a pod ?

Answer 15

kubectly apply -f or kubectly edit pod

Question 16

What are namespaces ?

Answer 16

A way of organising objects within a cluster ?

Question 17

How do you specify a namespace ?

Answer 17

Namespace directive under the meta data tag

Question 18

Whats the command for listing namespaces ?

Answer 18

kubectl get namespaces

Question 19

How do you create a namespace ?

Answer 19

kubectl create ns

Question 20

How do you list pods in a namespace ?

Answer 20

kubectl get pods -n

Question 21

What do the commands and args options do in a yaml file. ?

Answer 21

Allows you to specify a command and arguments to run

Question 22

How do you specify ports in a yaml file ?

Answer 22

container port option