reactor-demo-august-2021.md

Steps by step guide for Reactor Demo

Provision AKS cluster

Clone the repo for .Net Core application PD Tech Fest 2019

Switch to powershell directory and run the deployAll.ps1 script

This sets up the AKS cluster with default 3 nodes and deploys TechTalks application with all its services and dependencies including RabbitMQ, KEDA, TechTalksProducer and TechTalksConsumer.

Clone the repo for Spring Boot application spring-boot-conference-app

Switch to the mssql-server branch

Install Prometheus

Run the Powershell script install-prometheus.ps1 from powershell folder

Get Custom Resource Definitions (CRD) for Prometheus

kubectl get crd

Setup Spring Boot app

Apply manifest files from the following folder k8s folder

Setup Service & Pod monitors

For Spring Boot conference app, apply the manifest files from the k8s/prometheus-config folder using the command

kubectl apply -R -F .

For TechTalks app, apply the manifest files from the k8s/Prometheus folder using the same command as above

Port forward Prometheus, Grafana & AlertManager services

kubectl port-forward --namespace monitoring svc/prometheus-kube-prometheus-prometheus 9090:9090

kubectl port-forward --namespace monitoring svc/prometheus-kube-prometheus-alertmanager 9093:9093

kubectl --namespace monitoring port-forward svc/prometheus-grafana 80:80

Import Grafana dashboards

• RabbitMQ : https://grafana.com/grafana/dashboards/10991
• Springboot : https://grafana.com/grafana/dashboards/11955
• .Net core : https://grafana.com/grafana/dashboards/13399
• .Net Core Services : https://grafana.com/grafana/dashboards/12526
• .Net Core Controller Summary : https://grafana.com/grafana/dashboards/10915

Access Prometheus Metrics for Spring Boot App

http://20.44.227.76:8080/actuator/

http://20.44.227.76:8080/actuator/prometheus

Access Prometheus Metrics for .Net Core App

http://20.198.210.175/metrics

Generate load on conference API

Replace the load balancer IP

for i in `seq 1 3000`; do curl http://20.197.112.18:8080/api/v1/speakers/; done

for i in `seq 1 1500`; do curl http://20.197.112.18:8080/api/v1/sessions/; done

for i in `seq 1 20`; do curl http://20.197.112.18:8080/api/v1/crash/boom; done

20.197.112.18

for ($i =0; $i -lt 10; $i++)
{
    Invoke-WebRequest http://20.197.112.18:8080/api/v1/crash/boom
}

Generate load on the .Net Core TechTalks app

http://20.198.210.175/api/TechTalks/Generate?numberOfMessages=5000

Trigger Alert Manager Alert

kubectl delete -f api-deployment.yml

Remove Alert Manager trigger

kubectl apply -f api-deployment.yml