kubernetes service IPs not reachable

Question

So I\'ve got a Kubernetes cluster up and running using the Kubernetes on CoreOS Manual Installation Guide.

$ kubectl get no
NAME              STATUS                   


        

Answer 1

I had this same problem, and the ultimate solution that worked for me was enabling IP forwarding on all nodes in the cluster, which I had neglected to do.

$ sudo sysctl net.ipv4.ip_forward=1
net.ipv4.ip_forward = 1

Service IPs and DNS started working immediately afterwards.