dev-ops

Examen - Distributed Telemetry Archival Platform (DTAP™)

NodeJS (Poort 4000), PostgreSQL (12.22), InfluxDB (2.7) en Nginx Frontend achter Traefik.

Stap 1: Traefik (Infrastructure)

mkdir ~/traefik && cd ~/traefik

Maak de map voor de proxy

docker network create traefik

Maak het publieke netwerk aan (indien nog niet bestaat)

nano docker-compose.yml

Maak de Traefik config (zie Files)

docker compose up -d

Start Traefik (v3.6.7)

Stap 2: Dockerfiles

cd ~/examen-telemetry-platform

Ga naar de projectmap

nano api/Dockerfile

API Image: Node 20-bullseye, Poort 4000

nano frontend/Dockerfile

Frontend Image: Nginx 1.25

Stap 3: Applicatie Config & Data

nano .env

Definieer secrets (Postgres & Influx Credentials)

nano docker-compose.yml

Definieer services: api, frontend, postgres, influxdb

INFLUX_TOKEN=...

Tip: Zet een vast token in de Influx setup vars!

Stap 4: Starten & Verifiëren

docker compose up -d --build

Start de stack

docker compose logs -f api

Check of API connectie maakt met beide DB's

docker compose ps

Controleer of alles 'Up' is

Bestanden & Configuraties

api/Dockerfile

dockerfile

FROM node:20-bullseye
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 4000
CMD ["node", "index.js"]

Backend (NodeJS)

frontend/Dockerfile

dockerfile

FROM nginx:1.25
COPY . /usr/share/nginx/html

Frontend (Nginx)

~/traefik/docker-compose.yml

yaml

services: 
  traefik:
    image: traefik:v3.6.7
    command:
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--entrypoints.web.address=:80"
    ports:
      - "80:80"
      - "8080:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
    networks:
      - traefik
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.dashboard.rule=Host(`{{domain-2}}`)"
      - "traefik.http.routers.dashboard.service=api@internal"
networks: 
  traefik:
    external: true

Traefik Proxy Configuratie

.env (Project Root)

properties

# Postgres Config
POSTGRES_USER=myuser 
POSTGRES_PWD=mypassword 
POSTGRES_DB=telemetry 
# InfluxDB Config
INFLUX_USER=admin 
INFLUX_PWD=adminpassword123 
INFLUX_ORG=helios 
INFLUX_BUCKET=metrics 
INFLUX_TOKEN=my-super-secret-admin-token

Secrets voor de applicatie. Zorg dat API en DB variabelen matchen.

docker-compose.yml (Project Root)

yaml

services: 
  api:
    build: ./api
    networks:
      - traefik
      - backend
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.api.rule=Host(`{{domain-1}}`) && PathPrefix(`/api`)"
      - "traefik.http.services.api.loadbalancer.server.port=4000"
      - "traefik.docker.network=traefik"
    environment:
      - STORAGE_MODE=telemetry
      - POSTGRES_HOST=postgres
      - POSTGRES_DB=${POSTGRES_DB}
      - POSTGRES_USER=${POSTGRES_USER}
      - POSTGRES_PWD=${POSTGRES_PWD}
      - INFLUX_URL=http://influxdb:8086
      - INFLUX_TOKEN=${INFLUX_TOKEN}
      - INFLUX_ORG=${INFLUX_ORG}
      - INFLUX_BUCKET=${INFLUX_BUCKET}
    depends_on:
      - postgres
      - influxdb
  frontend:
    build: ./frontend
    networks:
      - traefik
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.frontend.rule=Host(`{{domain-1}}`)"
      - "traefik.docker.network=traefik"
  postgres:
    image: postgres:12.22
    volumes:
      - postgres-data:/var/lib/postgresql/data
      - ./postgres-init.sql:/docker-entrypoint-initdb.d/postgres-init.sql:ro
    networks:
      - backend
    environment:
      - POSTGRES_DB=${POSTGRES_DB}
      - POSTGRES_USER=${POSTGRES_USER}
      - POSTGRES_PASSWORD=${POSTGRES_PWD}
  influxdb:
    image: influxdb:2.7
    volumes:
      - influx-data:/var/lib/influxdb2
    networks:
      - backend
    environment:
      - DOCKER_INFLUXDB_INIT_MODE=setup
      - DOCKER_INFLUXDB_INIT_USERNAME=${INFLUX_USER}
      - DOCKER_INFLUXDB_INIT_PASSWORD=${INFLUX_PWD}
      - DOCKER_INFLUXDB_INIT_ORG=${INFLUX_ORG}
      - DOCKER_INFLUXDB_INIT_BUCKET=${INFLUX_BUCKET}
      - DOCKER_INFLUXDB_INIT_ADMIN_TOKEN=${INFLUX_TOKEN}
volumes: 
  postgres-data:
  influx-data:
networks: 
  traefik:
    external: true
  backend:

De volledige stack configuratie. Let op InfluxDB 2.7 init variabelen.