How does Docker file mount work?
Docker volume mounting is a mechanism that allows files or directories on the host file system to be mounted into a Docker container. This is achieved by associating files or directories on the host file system with the container’s file system, enabling the container to access and manipulate files associated with the host file system.
The specific principles are as follows:
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- Docker automatically synchronizes any changes to the host file system with the associated container when they occur.
- Applications within the container can access mounted files or directories as if they were created inside the container.
By using file mounting, containers can share files and exchange data with the host, which is very useful for the development, testing, and deployment of containerized applications. For example, configuration files, log files, or other data files that require persistent storage can be mounted into a container to retain data when the container is restarted. Similarly, code directories can be mounted into a container, allowing developers to see the updated effects in the container without rebuilding the image after making code modifications on the host.
