What is the purpose of mounting files in Docker?
The purpose of mounting Docker files is to share files and directories between the container and the host machine. By mounting, you can associate files or directories on the host machine with files or directories in the container, allowing the container to directly access the content on the host machine.
The functions of file mounting include the following aspects:
- Data persistence: Data inside containers is typically temporary and will be deleted when the container is either deleted or recreated. By mounting files, you can store container data on the host machine, ensuring data persistence, security, and reliability.
- Shared files: By mounting files, it is possible to associate files or directories on the host machine with those in the container, allowing the container to directly access the content on the host machine. This enables convenient file and directory sharing, facilitating data exchange and sharing between the container and host machine.
- Configuration management: By mounting files, configuration files can be passed from the host machine to the container, making it easier to manage the container’s configuration. When the configuration file changes, simply modify the configuration file on the host machine, and the container will automatically load the latest configuration without needing to restart.
- Rapid deployment: By mounting images and application packages, containers can be quickly deployed. Placing the images and application packages on the host machine, and then mounting them to the container via file mounting, can avoid redundant downloads and building of images, saving time and bandwidth.
In short, file mounting is a way to link files or directories on the host machine with files or directories in the container, used to achieve functions such as data persistence, file sharing, configuration management, and quick deployment.
