Docker Compose Postgres Database Seed

Onexlab

Sep 5, 2020·3 min read

In this article, you will learn how to do Postgres seeding using Docker Compose.

Video Link

Let’s Start Creating Docker Seeding

Hope you are familiar with “Docker-Compose”

Folder structure

Project
├── docker-compose.yml (File)
├── docker_postgres_init.sql (File)

Create a new file docker-compose.yml

Above file, we have created a Postgres Docker container with Port No: 5432

As well as set environment variables such as default username, password of Postgres container.

if you check the entire file we have also created volumes that point to the `docker_postgres_init.sql` file.

- ./docker_postgres_init.sql:/docker-entrypoint initdb.d/docker_postgres_init.sql

The script inside “docker_postgres_init.sql” will create a new table student and insert the records as well

When you run the following command in the root directory for the project.

docker-compose up

then you will see in the console docker_postgres_init.sql script will be executed as the following screenshot

that means your script executed successfully.

How to test

For testing, we used Pgadmin4 configured already in the docker-compose file.

Try to run the following URL in the browser

http://localhost:16543

and enter username and password as the following screenshot.

username: test@gmail.com
password: test123!

after successful login, you will see the following screen.

Then click on to server -> create -> server

You will see the following pop up then in the General tab type

name: root_user

Then click on the Connection tab as the following screenshot then input Hostname

You can get Hostname by typing the following command

$ ifconfig |grep inet

then type

Database: root

Username: root

Password: root

then click on to Save Button

then you will see the connection successful on the left side of the Pgadmin 4 navigation as shown below.

then go to Databases->root->Schema->Tables->students you will see there are 3 records as shown below in the screenshot.

Github

Thank you!