FastAPI container fails to connect to PostgreSQL.
However, the PostgreSQL container is running well and accessible.
I don’t know why this problem is happening.
Here is gist link of Dockerfile, docker-compose.yaml and log when docker-compose is run.
https://gist.github.com/sunwoo1524/9f75b4d3fd295c9829705e23a3b8094d
Sorry, I misread your compose file. It should be the name of the PG container, so
db:5432Thanks!
I also added
depends_on: - dbto docker-compose.yaml and fixed the issue!