feat(loadgenerator): allow customizing frontend protocol

[aslafy-z]

Background

I would like to point locust to my nginx ingress instead of the service.

Change Summary

This PR adds support for customizing the protocol locust uses while querying the online-boutique website.

Additional Notes

Backwards compatible.

Testing Procedure

• Deploy the app with:

  
  apiVersion: kustomize.config.k8s.io/v1beta1
  kind: Kustomization
  namespace: online-boutique
  resources:

• https://github.com/GoogleCloudPlatform/microservices-demo//kustomize/base?ref=6af73dcf7fe1ca653d95ae7a29e12faf8cf02964
• ingress.yaml components:
• https://github.com/GoogleCloudPlatform/microservices-demo//kustomize/components/network-policies?ref=6af73dcf7fe1ca653d95ae7a29e12faf8cf02964
• https://github.com/GoogleCloudPlatform/microservices-demo//kustomize/components/non-public-frontend?ref=6af73dcf7fe1ca653d95ae7a29e12faf8cf02964 patches:
• patch: | apiVersion: apps/v1 kind: Deployment metadata: name: loadgenerator spec: template: spec: containers:
  • name: main image: ghcr.io/aslafy-z/microservices-demo/loadgenerator:483c6f731bb7c408ff5be379683b0ace8ea5833c env:
    • name: FRONTEND_PROTO value: https
    • name: FRONTEND_ADDR value: shop.example.com

• Ensure the load testing is running correctly looking at the logs