Expected Behavior: The docker-compose up command should create a psql database and user with the default credentials from the 001-init-chirpstack_ns.sh file: create role chirpstack_ns with login password 'chirpstack_ns'; create database chirpstack_ns with owner chirpstack_ns; Testing: I tried to connect to the Database from command line: If you modify the files, Docker will just copy the layer where the changes were applied. The first step is to create a Dockerfile. Assuming there is no Docker image that suits your needs on the Docker Hub, you can create one yourself.. Start by creating a new Dockerfile:. Docker command for starting PostgreSQL … Create a Docker image that can run PostgreSQL; Run a container based on that image; Connect to the PostgreSQL instance running inside that container to verify that it’s working; Let’s get started. Here’s the syntax: Start with docker run. OK, so now we have the Postgres image, let’s learn how to run it to start a Postgres database server container. Depending on the type of project, you might need a PostgreSQL database for your app's local development. Install PostgreSQL on Docker. Check your container ID to use to access the running container by running the below command: docker ps -a If you enter docker ps you’ll also see information about the image that was used to create the container (mysql:latest in this example), when the container was created and how long it’s been running, ports available (should be 3306/tcp) and the name we gave it (test-mysql). docker run --rm -e POSTGRES_PASSWORD=password postgres:12 & 2. Today, Postgres is one of the most widely used Docker images that run in containers. proget-postgres: This is the name of the Docker container running PostgreSQL. Creating the image. In fact, PostgreSQL and MySQL are the most popular Relational Database Management Systems. Use the command below to start your image which automatically assigns a password to the Postgres database, for this article I will leave it as a password. I wrote the following dockerfile ... disabled. We use the docker run command for this purpose. But one of the easiest ones is to use Docker. There are a couple of options available from running the Postgres.app Mac app or through homebrew. docker exec: This runs a command inside a Docker container.-u postgres: We want to run the command as the postgres user because the docker exec command defaults to using the root user and the root user does not have access to the database. The script inside “docker_postgres_init.sql” will create multiple databases upon container startup. If all went well, you’ll see a very long number, which is the container’s ID. PostgreSQL, also referred to as Postgres, is an open-source, object-relational database management system.Developers often opt for this relational database as it is free, stable, and flexible. Dockerize PostgreSQL. You can see the following file we have created 2 database and different 2 users for each database. The -e flag is used to set environment variable for the container. Name this file Dockerfile and put it inside a fresh empty directory. The PostgreSQL object-relational database system provides reliability and data integrity. Estimated reading time: 5 minutes. Then we use the --name flag to specify the name of the container. docker-compose exec: execute a command inside a running container; db: name of the service (see configuration in docker-compose.yml); psql: terminal command to run, see psql-U postgres: user name is postgres-d task_management: connect to the database called task_management; Alternatively, you can use a GUI tool like pgAdmin or DBeaver.. 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