Hands-On Microservices with Rust

Adding persistent state to the application

We created an application that consists of microservices, and that doesn't have a persistent state – the application is empty on every restart. Fixing this is simple: map the persistent volume to a folder of the container. Since no one microservice of our application keeps the data in files, but the PostgreSQL database does, we only need to attach a folder to a database container. Copy docker-compose.test.yml to docker-compose.prod.yml and add the following changes:

services:  db:    image: postgres:latest    restart: always    environment:      - POSTGRES_USER=postgres      - POSTGRES_PASSWORD=password    volumes:      - database_data:/var/lib/postgresql/data  # other containers definitionvolumes:  database_data: driver: local ...