Project 95

Traefik Rate Limit

https://gitorko.github.io/spring-boot-traefik-rate-limit/

Version

Check version

$java --version
openjdk version "21.0.3" 2024-04-16 LTS

helm version --short
v3.9.1+ga7c043a

kubectl version --short
Client Version: v1.24.3
Kustomize Version: v4.5.4

Postgres DB

docker run -p 5432:5432 --name pg-container -e POSTGRES_PASSWORD=password -d postgres:9.6.10
docker ps
docker exec -it pg-container psql -U postgres -W postgres
CREATE USER test WITH PASSWORD 'test@123';
CREATE DATABASE "test-db" WITH OWNER "test" ENCODING UTF8 TEMPLATE template0;
grant all PRIVILEGES ON DATABASE "test-db" to test;

docker stop pg-container
docker start pg-container

Docker

For docker on laptop we cant use localhost as the hostname, so add this entry to the /etc/hosts file.

127.0.0.1 localhost.com

Build the project and docker image

cd project95
./gradlew bootRun
./gradlew clean build
docker build -f docker/Dockerfile --force-rm -t project95:1.0.0 .

If you want to deploy via docker compose.

docker tag project95:1.0.0 gitorko/project95:1.0.0
docker push gitorko/project95:1.0.0
docker-compose -f docker/docker-compose.yml up 

Traefik

Deploy traefik via helm

helm install traefik traefik/traefik

Traefik comes with the dashboard to visualize the config that is not exposed so run port forward command. If you dont need to visualize the config then you can skip this step as it is not mandatory

kubectl port-forward $(kubectl get pods --selector "app.kubernetes.io/name=traefik" --output=name) 9000:9000

Open the dashboard url

http://127.0.0.1:9000/dashboard/

Kubernetes

Now deploy the application on kubernetes

If you want a plain deployment without traefik, This will deploy the spring boot application along with postgres, run the below command

kubectl apply -f docker/deployment.yaml

To test the api, run the curl command

curl --request GET 'http://localhost.com:8080/rest/time'

Clean up

kubectl delete -f docker/deployment.yaml

Kubernetes & Traefik Ingress

If you want traefik as the ingress controller, run the below command

kubectl apply -f docker/deployment-traefik.yaml

To test the api, run the curl command

curl --request GET 'http://localhost.com/rest/time'

Clean up

kubectl delete -f docker/deployment-traefik.yaml

Kubernetes & Traefik IngressRoute with Rate Limit

If you want traefik as the ingress & want to rate limit, run the below command

kubectl apply -f docker/deployment-traefik-ratelimit.yaml

To test the api, run the curl command

curl --request GET 'http://localhost.com/rest/time'

Clean up

kubectl delete -f docker/deployment-traefik-ratelimit.yaml

Few command to look at the services

kubectl get ingress
kubectl describe ingress

kubectl get ingressroute 
kubectl describe ingressroute 

kubectl get all

k logs -f deployment.apps/project95 --all-containers=true

helm uninstall traefik