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Building a Microservice with Docker Compose
You’ve just completed developing your weather application, and are ready to deploy it to your production Docker server. After doing some analysis, you decided to deploy three containers that will be load-balanced using Nginx. To do this you need to create a Docker Compose file that will create three `weather-app` services on a private network. Then you will create an Nginx service that will be publicly accessible and have it load balance traffic to the weather-app services.

Lab Info
Table of Contents
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Challenge
Create the Compose File
Create
docker-compose.yml
:vi docker-compose.yml
The contents of
docker-compose.yml
should be:version: '3' services: weather-app1: build: context: ./weather-app args: - VERSION=v2.0 ports: - "8080:3000" networks: - weather_app environment: - NODE_ENV=production weather-app2: build: context: ./weather-app args: - VERSION=v2.0 ports: - "8081:3000" networks: - weather_app environment: - NODE_ENV=production weather-app3: build: context: ./weather-app args: - VERSION=v2.0 ports: - "8082:3000" networks: - weather_app environment: - NODE_ENV=production nginx: build: ./nginx tty: true ports: - '80:80' networks: - frontend - weather_app networks: frontend: weather_app: internal: true
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Challenge
Add the Services to nginx.conf
Update
nginx/nginx.conf
:vi nginx/nginx.conf
The contents of
nginx.conf
should be:events { worker_connections 1024; } http { upstream localhost { server weather-app1:3000; server weather-app2:3000; server weather-app3:3000; } server { listen 80; server_name localhost; location / { proxy_pass http://localhost; proxy_set_header Host $host; } } }
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Challenge
Create the Docker Compose Service
Create the Compose service:
docker-compose up -d
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