the database is not created during container startup with postgres - docker

Question

docker-compose.yml
version: '3.5'
services:
postgres:
container_name: postgres_container
image: postgres:11.7
environment:
POSTGRES_USER: ${POSTGRES_USER:-postgres}
POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-root}
PGDATA: /data/postgres
# ./init.sql (for unix system)
# //docker/init.sql:/docker-entrypoint-initdb.d/init.sql - for Windows
volumes:
- postgres:/data/postgres
- //docker/init.sql:/docker-entrypoint-initdb.d/init.sql
ports:
- "5432:5432"
networks:
- postgres
restart: unless-stopped
pgadmin:
container_name: pgadmin_container
image: dpage/pgadmin4
environment:
PGADMIN_DEFAULT_EMAIL: ${PGADMIN_DEFAULT_EMAIL:-pgadmin4#pgadmin.org}
PGADMIN_DEFAULT_PASSWORD: ${PGADMIN_DEFAULT_PASSWORD:-admin}
volumes:
- pgadmin:/root/.pgadmin
ports:
- "${PGADMIN_PORT:-5050}:80"
networks:
- postgres
depends_on:
- postgres
restart: unless-stopped
networks:
postgres:
driver: bridge
volumes:
postgres:
pgadmin:
When the container is raised, the script must be run.
init.sql
CREATE DATABASE example;
CREATE DATABASE test;
But no databases are created. I have to create them through the console, manually
Who has any idea why this is the case and how to fix it? (The figure shows that the script is mounted in a container)
Solution
I stopped and deleted all the containers.
Then deleted the volumes.
After that, I started docker-compose.yml again.
The databases were created.
Perhaps the first launch failed, the volumes were created, and when I corrected the file, the second launch of the database creation command was not executed, since the volumes were already created for the current container. Thanks for the tip.

Answer 1

From the update, it appears that a previous startup of the database had been done. Once that happens, the volume gets initialized. And once the volume has data, the entrypoint for the database will not perform the initialization step again.
The solution is to stop the database, delete the volume with the bad database data, and then restart the database.