Security - KubeConfig

Question 1

How can you call a KubeConfig-File with kubectl?

Answer 1

kubectl get pods –kubeconfig config

Question 2

What are contents of KubeConfig?

Answer 2

-- server my-kube-playground:6443
--client-key admin.key
--client-certificate admin.crt
--certificate-authority ca.crt

Question 3

Where does the kubectl command look by default for a kubeconfig file?

Answer 3

$HOME/.kube/config

Question 4

What is the structure of a KubeConfig file?

Answer 4

1. Clusters (various clusters, you need access to)
2. Contexts (define which user account will be accessed with which cluster, Dev@Google)
3. Users (user accounts with which you have access to these clusters)

Question 5

How does a KubeConfig file look?

Answer 5

apiVersion: v1
kind: Config
current-context: dev-user@google
clusters:
  - name: my-kube-playground
    cluster:
		 certificate-authority: ca.crt
			server; https://my-kube-playground:6443

contexts:
  name: my-kube-admin@my-kube-playground
	context: 
	  cluster: my-kube-playground
		user: my-kube-admin

users:
  - name: my-kube-admin
    user:
		  client-certificate: admin.crt
			client-key: admin.key

Question 6

What is the ‘current-context’ in a KubeConfig used for?

Answer 6

• specifies the default context that should be user?

Question 7

How can we view the current used KubeConfig file?

Answer 7

kubectl config view

Question 8

How do you update your current context?

Answer 8

kubectl config user-context prod-user@production

Question 9

Can you configure a context to switch to a particular namespace?

Answer 9

Yes
Contexts section in the KubeConfig file can take a field
context.namespace

When you switch to that context, youre automatically in that namespace

Question 10

With what command can you see config files under /.kube/

Answer 10

with ‘ls -a’

Question 11

How can you view a environment variable on linux?

Answer 11

echo $VARIABLE

like
echo $HOME

Question 12

In linux how can you copy a file from place a to b?

Answer 12

cp my-kube-config ~/.kube/config

Question 13

In linux how can you rename a file?

Answer 13

mv oldfilename newfilename