Can't communicate from docker container (.NET Core App) to postgreSQL on host droplet!

Posted February 15, 2021 763 views
DockerPostgreSQLDigitalOcean Droplets

What connectionstring should I use to connect from my Docker container (.NET Core App) to my PostgreSQL database installed on the host Droplet. Both container and database are on the same droplet.
Navigating to the website works but get error:

Failed to load resource: the server responded with a status of 400 (Bad Request)

When trying to communicate with database.

This is my connectionstring:

  "ConnectionStrings": {
    "DefaultConnection": "host=;database=my_db;username=username;password=password"

I’ve tried both public IP and private IP for host part in connectionstring but doesn’t work.

What should be used here?

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Submit an Answer
1 answer

using –net=host in the docker command fixed it actually!

docker run -d -p 5000:5000 --net=host