Solution

Mon, 01 Jan 0001 00:00:00 +0000

Let’s create a new Pod and expose it with a ClusterIP Service

kubectl run nginx --image=nginx:1.20 --port 80 --expose

Let’s new get an interactive shell in an Alpine based Pod

kubectl run -ti --rm debug --image=alpine -- sh

We cannot reach the nginx Pod from the debug one:

/ # wget http://nginx
wget: bad address 'nginx'

Going one step further we can see the name resolution is not working fine:

/ # nslookup nginx
;; connection timed out; no servers could be reached

kubectl get deploy -n kube-system
NAME READY UP-TO-DATE AVAILABLE AGE
coredns 0/0 0 0 2d17h

Seems like there is no replica running for the dns (should be 2 by default)

Challenge 3 on Exoscale Academy