prabhatraghav / springboot-web-app Goto Github PK

• ensure Java 19 installed locally
• have a Docker Desktop with a DockerHub logged in and a Kubernetes cluster enabled

• Build project with a ./gradlew build command
• Build and push a docker image of the just built app with ./docker-build.sh
• Run kubectl apply -f kube/app.yaml for spinning up the app Kubernetes service
• Check that the app is running on localhost having http://localhost:3080/read endpoint responding

• Should be accessible by http://localhost:3080/actuator/prometheus
• Metrics directly written by app logic, among others:
  • api_read_get_total
  • method_timed_seconds with labels

Detailed guides and docs could be taken from here:

• Prometheus setup: https://devopscube.com/setup-prometheus-monitoring-on-kubernetes/
• Grafana setup: https://grafana.com/docs/grafana/latest/setup-grafana/installation/kubernetes/

Execute the following commands in terminal in order to get Grafana and Prometheus services running:

• kubectl create namespace monitoring
• kubectl create -f kube/prometheus/clusterRole.yaml
• kubectl create -f kube/prometheus/config-map.yaml
• kubectl create -f kube/prometheus/prometheus-deployment.yaml
• kubectl create -f kube/prometheus/prometheus-service.yaml
• kubectl create -f kube/grafana.yaml

Make sure that deployments are running:

• kubectl get deployments --namespace=monitoring
• see Prometheus running and observing /actuator/prometheus target successfully: http://localhost:30000/targets?search=actuator
• see Grafana is up and running: `http://localhost:3000/

Wire Grafana to Prometheus:

• open http://localhost:3000/ and login with the Grafana default credentials (admin/admin)
• open http://localhost:3000/connections/add-new-connection
• point to the server url as this one http://prometheus-service:8080, leave the rest to defaults

In order to add an example dashboard reading metrics configured, simply import the Dashboard from grafana/example_dashboard.json project file.

Example load kotlin script together with enclosing package folder is located in load/ project folder. Simply copy-paste it to the ../user-files/simulations/ folder of your local Gatling installation, and chose it when running from gatling command line command.