Networking¶

First, configure external access so we can run kubectl commands from our own machine.

Confirm the you can now call the following:

kubectl get nodes -o wide

Configure WeaveNet¶

kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')&env.IPALLOC_RANGE=10.200.0.0/16"

Confirm WeaveNet works¶

kubectl get pod --namespace=kube-system -l name=weave-net

It should look like this:

NAME              READY     STATUS    RESTARTS   AGE
weave-net-fwvsr   2/2       Running   1          4h
weave-net-v9z9n   2/2       Running   1          4h
weave-net-zfghq   2/2       Running   1          4h

Configure CoreDNS¶

Before installing CoreDNS, please confirm networking is in order.

kubectl get nodes -o wide

Warning

If nodes are not Ready, something is wrong and needs to be fixed before you continue.

kubectl apply -f ../configs/core-dns-config.yaml

Confirm CoreDNS pods¶

kubectl get pod --all-namespaces -l k8s-app=coredns -o wide

Confirm DNS works¶

kubectl run busybox --image=busybox:1.28 --command -- sleep 3600

POD_NAME=$(kubectl get pods -l run=busybox -o jsonpath="{.items[0].metadata.name}")

kubectl exec -ti $POD_NAME -- nslookup kubernetes

Note

It should look like this:

Server:    10.10.0.10
Address 1: 10.10.0.10 kube-dns.kube-system.svc.cluster.local

Name:      kubernetes
Address 1: 10.10.0.1 kubernetes.default.svc.cluster.local

Last update: 2019-08-31 13:29:28