sclash / django-postgres-docker

Test repo for Django DB management with Postgres with Docker

Django with PostgreSQL and Docker

This Repo is for testing Django DB management functionalities with a PostgresDB. Both the Django application and the Postgres server instance are running from inside communicating Docker containers. Check the docker-compose.yml and settings.py to understand how.

• Building and runnign the Docker containers
  • Stop and Clear Containers
• Network Availability
  • Connect to docker container on host through DNS
• Connect to Postgres
  • Credentials

Building and runnign the Docker containers

cd in the project directory (the one containing docker-compose.yml)

sudo docker compose build
sudo docker compose up

or

sudo docker compose up --build

Stop and Clear Containers

sudo docker compsoe down --volumes
sudo docker image prune
sudo docker network prune

Network Availability

Both Containers are exposed on the local network at the following ports:

• Django: <ipv4>:1111 e.g. http://172.26.25.20:1111
• Postgres: <ipv4>:5432 e.g. http://172.26.25.20:5432

NOTE: the <ipv4> address must be listed in the ALLOWED_HOSTS in the settings.py file. (In this case it set to '*' e.g. any host is allowed)

Connect to docker container on host through DNS

How can we connect to a container from host at service_name:port insted of using Ipv4 address of the container?

modify the /etc/hosts with 172.26.35.20 alias modify the /etc/hosts with <Docker-network-address> alias

To get <Docker-network-address> either run ip addr show or

sudo docker network ls # to get the network_name
sudo docker network inspect <network_name> # to get the <Docker-network-address>

• StackOverflow
• DPS
• Change host config

Connect to Postgres

You can connect at the PostgreSQL server using the above address while connectedd to the local network.

Credentials

DB_NAME=django_postgres
DB_USERNAME=asergi
DB_PASSWORD=abcde