node-hello-server

A simple stateless HTTP server written in Node.js which returns a timestamp, 'Hello World' + a unique string. This server can be used to check loadbalancing as every instance returns an own unique string.

Requirements

• Git and Node.js or Docker / Kubernetes

Source version

Clone

git clone https://github.com/giftkugel/node-hello-server.git
cd node-hello-server

Run the server

node index.js

Docker image from Docker Hub

Start the container

docker run --name node-hello -d -p 8080:8080 giftkugel/node-hello:latest

Running on Kubernetes (e.g. bundled with Docker Desktop)

Create deployment

kubectl create deployment hello --image=giftkugel/node-hello:latest

Expose the deployment

kubectl expose deployment hello --port=8080 --target-port=8080 --name=hello-service --type=LoadBalancer

Usage

Default

curl http://localhost:8080

Response

Plain text

2020-10-21T13:52:47.792Z] - Hello World          - request=5bf3b6dec71250b9, id=142a4a66, ip=::1, method=GET, node=v12.9.0, count=0000000003, path=/

Custom headers in response

Server: node-hello-server 142a4a66
Request-Id: 5bf3b6dec71250b9
Node-Version: v12.9.0
Count: 0000000003
Connection-Date: 2020-10-21T13:52:47.792Z

Configuration

Wait for a reponse

You can set the wait query parameter to let the server wait an amount of time before the answer is send

Example: Wait 5 seconds

curl http://localhost:8080?wait=5000