I used to be able to curl
https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT/api/v1beta3/namespaces/default/
as my base URL, but in kubernetes 0.18.0 it gives me "unauthorized". The strange thing is that if I used the external IP address of the API machine (http://172.17.8.101:8080/api/v1beta3/namespaces/default/
), it works just fine.
In the official documentation I found this:
https://kubernetes.io/docs/tasks/access-application-cluster/access-cluster/#accessing-the-api-from-a-pod
Apparently I was missing a security token that I didn't need in a previous version of Kubernetes. From that, I devised what I think is a simpler solution than running a proxy or installing golang on my container. See this example that gets the information, from the api, for the current container:
I also use include a simple binary, jq (http://stedolan.github.io/jq/download/), to parse the json for use in bash scripts.