Postgres in Docker

docker-compose.yml

version: '3.8'

services:
  postgres:
    image: postgres:15
    container_name: postgres_db
    environment:
      POSTGRES_USER: admin
      POSTGRES_PASSWORD: admin_password
      POSTGRES_DB: my_database
    ports:
      - "5432:5432"
    volumes:
      - postgres_data:/var/lib/postgresql/data

  pgadmin:
    image: dpage/pgadmin4
    container_name: pgadmin_container
    environment:
      PGADMIN_DEFAULT_EMAIL: [e-mail]
      PGADMIN_DEFAULT_PASSWORD: admin_password
    ports:
      - "8080:80"
    depends_on:
      - postgres

volumes:
  postgres_data:

Configuration Breakdown

• PostgreSQL Service:

  • image: postgres:15: Specifies the PostgreSQL version.

  • POSTGRES_USER, POSTGRES_PASSWORD, POSTGRES_DB: Environment variables to set up the database and credentials.

  • ports: "5432:5432": Exposes PostgreSQL on port 5432 (default port).

  • volumes: Mounts a Docker volume to persist PostgreSQL data.

• pgAdmin Service:

  • image: dpage/pgadmin4: Pulls the latest pgAdmin image.

  • PGADMIN_DEFAULT_EMAIL and PGADMIN_DEFAULT_PASSWORD: Default login credentials.

  • ports: "8080:80": Exposes pgAdmin on port 8080.

  • depends_on: Ensures PostgreSQL starts before pgAdmin.

Start the service

docker-compose up -d