Simple sleep service

This sample consists of a simple service that does nothing but sleep. It's a ubuntu container with curl installed that can be used as a request source for invoking other services to experiment with Istio networking. To use it:

1. Install Istio by following the istio install instructions.

2. Start the sleep service:

   kubectl apply -f <(istioctl kube-inject -f sleep.yaml)

   Note that if you also want to be able to directly call external services, you'll need to set the --includeIPRanges option of kube-inject. See configuring egress for details.

3. Start some other services, for example, the Bookinfo sample.

Now you can kubectl exec into the sleep service to experiment with Istio. For example, the following commands can be used to call the Bookinfo ratings service:

export SLEEP_POD=$(kubectl get pod -l app=sleep -o jsonpath={.items..metadata.name})
kubectl exec -it $SLEEP_POD -c sleep curl http://ratings.default.svc.cluster.local:9080/ratings
{"Reviewer1":5,"Reviewer2":4}