did you specify the right host or port? error on Kubernetes

Question

I have followed the helloword tutorial on http://kubernetes.io/docs/hellonode/.

When I run:

kubectl run hello-node --image=gcr.io/PROJECT_ID/hello-node         


        

Answer 1

I had this problem using a local docker. The thing to do is check the logs of the containers its spins up to figure out what went wrong. For me it transpired that etcd had fallen over

   $ docker logs 
   
   2016-06-15 09:02:32.868569 C | etcdmain: listen tcp 127.0.0.1:7001: bind: address already in use

Aha! I'd been playing with Cassandra in a docker container and I'd forwarded all the ports since I wasn't sure which it needed exposed and 7001 is one of its ports. Stopping Cassandra, cleaning up the mess and restarting it fixed things.