Why does container return role "postgres" does not exist error?

Question

PostgreSQL

Cloned the repository to the cloud. Nginx + django + PostgreSQL Containers started, then plugging.

I try to migrate, I get:

File "/usr/local/lib/python3.8/site-packages/psycopg2/__init__.py", line 127, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: FATAL:  database "foodgram" does not exist

I'm trying to create a database through the container, I get a strange error in general.

[email protected]:/home/dronsovest/foodgram-project# docker exec -it 86235d81aa7d psql -U postgres
psql: error: could not connect to server: FATAL:  role "postgres" does not exist

How can a container from the default postgres12 image not see the postgres role of the user of the same name?

Answer 1

How do you start a container with Postgresql?
Perhaps you do not specify POSTGRES_PASSWORD and then the database cannot be initialized.
See section *How to use this image*