gistfile1.txt

#!/bin/bash

cat << EOF > ss.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  ports:
  - port: 80
    name: web
  clusterIP: None
  selector:
    app: nginx
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
spec:
  serviceName: "nginx"
  replicas: 200
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: k8s.gcr.io/nginx-slim:0.8
        ports:
        - containerPort: 80
          name: web
EOF

echo "running test now"

SOURCE=web-50
TARGET=web-150

# change web-50 to any pod up to the amount in spec.replicas
kubectl apply -f ss.yaml # wait for 200 pods to come up.
kubectl get pod $TARGET -o go-template={{.status.podIP}}
targetPod=`kubectl get pod web-1 -o go-template={{.status.podIP}} | sed 's/.$//'`
echo $targetPod
echo "Attempting to curl nginx message directly from pod, then exiting..."
kubectl exec -t -i $SOURCE -- curl $targetPod 
echo "Inspecting output ..."
kubectl exec -t -i $SOURCE -- curl $targetPod | grep -q nginx
exitCode=$?
echo "Exit code was $exitCode"
exit $exitCode