Deploying PostgreSQL and pgAdmin using Docker Compose
Docker is a popular tool used by developers to create and deploy applications in containers. Docker Compose is a tool used for defining and running multi-container Docker applications. In this blog post, we will describe a Docker Compose file that deploys a PostgreSQL database and a pgAdmin dashboard.
The Docker Compose File
The Docker Compose file has two services defined - postgres and pgadmin. The postgres service is based on the official PostgreSQL Docker image and runs a PostgreSQL server inside a container. The pgadmin service is based on the official pgAdmin4 Docker image and runs a pgAdmin dashboard inside a container.
services:
postgres:
container_name: postgres
image: postgres:alpine
environment:
- POSTGRES_USER=${POSTGRES_USER}
- POSTGRES_PASSWORD=${POSTGRES_PW}
- POSTGRES_DB=${POSTGRES_DB} #optional (specify default database instead of $POSTGRES_DB)
- PGDATA=/data/postgres
volumes:
- ${PWD}/data:/data/postgres
ports:
- "5432:5432"
restart: always
pgadmin:
container_name: pgadmin
image: dpage/pgadmin4:latest
environment:
- PGADMIN_DEFAULT_EMAIL=${PGADMIN_MAIL}
- PGADMIN_DEFAULT_PASSWORD=${PGADMIN_PW}
ports:
- "5050:80"
restart: always
Advantages and Disadvantages
Using Docker Compose to deploy PostgreSQL and pgAdmin has several advantages, including:
- Easy deployment: Docker Compose simplifies the deployment process by allowing developers to define and run multi-container applications with a single command.
- Data persistence: Docker Compose provides data persistence by allowing developers to mount local volumes to containers, ensuring that data is not lost when containers are destroyed or recreated.
- Portability: Docker Compose allows developers to define their application infrastructure in a single file, making it easy to move the application between different environments.
However, using Docker Compose to deploy PostgreSQL and pgAdmin also has some disadvantages, including:
- Increased complexity: Using Docker Compose adds an additional layer of complexity to the application architecture, which can be difficult to manage and troubleshoot.
This is mostly for my own use. Please suggest improvements in it if you can.