How can I establish a successful connection from OpenMetaData, operating within Docker, to a Database/Airflow Server hosted on 'localhost'?

[Prajwal214]

Encountering a connectivity issue while trying to establish a connection from OpenMetaData, which is operating within Docker, to the database/Airflow server hosted at 'localhost'.

[Prajwal214]

Why use host.docker.internal instead of localhost in Docker?

When working with Docker containers, especially in a development environment, using localhost to refer to the host machine might not work as expected. This is because each container has its own network namespace, and localhost inside a container refers to the container itself, not the host.

To connect from a container to a service running on the host machine, you typically need to use a special DNS name provided by Docker called host.docker.internal. This DNS name resolves to the internal IP address of the host machine from within a container, allowing communication between the container and services running on the host.

So, the requirement to use host.docker.internal instead of localhost arises from the need to access services running on the host machine from within a Docker container. It provides a consistent way to reference the host machine's IP address regardless of the networking setup of the container.