Kubernetes 1.3 HA Walkthrough – SkyDNSPosted: October 11, 2016
Table of Contents
You can find all of the config files on the GitHub page.
Kubernetes uses a DNS server based off of SkyDNS to . You can read more about it here.
You probably want to perform the actions below on the same machine where you installed kubectl.
Create the SkyDNS Kubernetes service
Download the service definition file
Edit skydns-svc.yaml and change clusterIP to 172.16.0.10 or anything else that is in your etcd IP pool. Mine is 172.16.0.0/16. I believe this IP needs to be in your certificate as a SAN entry. Before I did this the SkyDNS containers would fail and the Kubernetes controller node reported certificate errors from the skydns containers.
apiVersion: v1 kind: Service metadata: name: kube-dns namespace: kube-system labels: k8s-app: kube-dns kubernetes.io/cluster-service: "true" kubernetes.io/name: "KubeDNS" spec: selector: k8s-app: kube-dns clusterIP:172.16.0.10 ports: - name: dns port: 53 protocol: UDP - name: dns-tcp port: 53 protocol: TCP
Create the service
kubectl create -f skydns-svc.yaml
Which should result in:
service “kube-dns” created
Create the skydns deployment
deployment “kube-dns-v19” created
kubectl –namespace=kube-system get pods
NAME READY STATUS RESTARTS AGE kube-dns-v19-965658604-p2js8 3/3 Running 0 22h kube-dns-v19-965658604-ru5ac 3/3 Running 0 22h