Docker Networking Cookbook

Resetting the local Docker network database

With the advent of user-defined networks, users are able to define custom network types for their containers. Once defined, these networks persist through system reboots until they are deleted by an administrator. In order for this persistence to work, Docker needs some place to store information related to your user-defined networks. The answer is a database file that's local to the host. In some rare cases, this database can get out of sync with the current state of the containers on the host or become corrupt. This can cause issues related to deleting containers, deleting networks, and starting the Docker service. In this recipe, we'll show you how to remove the database to restore Docker back to ...