oliviercuyp/hello-js repository overview

⁠hello-js

A simple expressjs server for ops tests.

⁠Routes

• GET / respond: hello <name> (name is env.NAME)
• GET /cookies respond: { "cookies": { ... } } (exposes req.cookies)
• GET /error respond: { "error": "Some error happened !" } (generates error)
• GET /headers respond: { "headers": { ... } } (exposes req.headers)
• GET /ip respond: { "ip": "x.x.x.x" } (exposes client ip)

⁠Environment variables

• APP_PORT Port on which the express server listen (default: 3000)
• NAME Name shown root route (default: 'JS')
• START_DELAY Delay in seconds the server wait to start (default: 0)

⁠How to run

Local

docker-compose up

You can play around with the env vars.

On Swarm

This is just a working exemple. You should tweak it for your needs (e.g. increase the START_DELAY to fail the healthcheck).

version: '3.7'

services:
  hello-js:
    image: oliviercuyp/hello-js:latest
    healthcheck:
      test: wget -q -t 1 --spider http://localhost:3000
      interval: 10s
      timeout: 2s
      retries: 3
      start_period: 5s
    ports:
      - 3000:3000
    environment:
      APP_PORT: 3000
      NAME: JS
      START_DELAY: 0
    deploy:
      resources:
        limits:
          memory: 32M
      update_config:
        monitor: 120s