README.md

1. Deploy the backends with the number of replicas we desire (we can always use kubectl later to scale up or down)

kubectl apply -f backend.yaml

2. I recommend use the ClusterIP the Service and not depend on DNS since we just want to test the IP traffic

kubectl get service
NAME           TYPE        CLUSTER-IP         EXTERNAL-IP   PORT(S)   AGE
kubernetes     ClusterIP   10.96.0.1     <none>        443/TCP   4d3h
test-service   ClusterIP   10.96.0.23   <none>        80/TCP    13m

In this case is 10.96.0.3

3. We can do manual tests just runnin an httpd:2 container

kubectl run ab1 --image apache:2
# ab -c 100 -t 2 -v 1 http://10.96.0.23:80/
This is ApacheBench, Version 2.3 <$Revision: 1903618 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 10.96.0.23 (be patient)
Completed 5000 requests
Completed 10000 requests
Completed 15000 requests
Finished 16021 requests


Server Software:
Server Hostname:        10.96.0.23
Server Port:            80

4. If we can stress more the Service we can run multiple clients in parallel using a Job an adjunsting the completion and parallelism parameters

$ kubectl apply -f tester.yaml
$ kubectl get jobs
NAME     COMPLETIONS   DURATION   AGE
abtest   12/12         54s        5m19s

$  kubectl get pods
NAME                                 READY   STATUS             RESTARTS        AGE
ab1                                  0/1     ImagePullBackOff   0               22m
ab2                                  1/1     Running            0               21m
abtest-2dpdr                         0/1     Completed          0               5m11s
abtest-2rz6p                         0/1     Completed          0               5m24s
abtest-4lbsw                         0/1     Completed          0               5m36s
abtest-5456b                         0/1     Completed          0               4m56s
abtest-57277                         0/1     Completed          0               4m58s
abtest-b6lll                         0/1     Completed          0               5m11s
abtest-bzj7h                         0/1     Completed          0               5m24s
abtest-dzcvh                         0/1     Completed          0               5m36s
abtest-g4bg5                         0/1     Completed          0               5m36s
abtest-jc6qp                         0/1     Completed          0               5m24s
abtest-rptd8                         0/1     Completed          0               5m10s
abtest-wt9ft                         0/1     Completed          0               4m57s

backend.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: server-deployment
  labels:
    app: MyApp
spec:
  replicas: 2
  selector:
    matchLabels:
      app: MyApp
  template:
    metadata:
      labels:
        app: MyApp
    spec:
      containers:
      - name: agnhost
        image: k8s.gcr.io/e2e-test-images/agnhost:2.39
        args:
          - netexec
          - --http-port=80
---
apiVersion: v1
kind: Service
metadata:
  name: test-service
spec:
  type: ClusterIP
  selector:
    app: MyApp
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

tester.yaml

apiVersion: batch/v1
kind: Job
metadata:
  name: abtest
spec:
  completions: 12
  parallelism: 3
  template:
    spec:
      containers:
      - name: ab
        image: httpd:2
        command: ["ab", "-n 50000", "-c 1000", “-v 1”, “http://[fd00:10:96::4d0c]:80/”]
      restartPolicy: Never