Container volume mounting for development¶
Container volume mounting is a technique used in software development to synchronize files between the host machine and a container. By mapping a specific directory on the host to a path inside the container, changes made to files on the host are immediately reflected inside the container environment, and vice versa.^[400-devops__09-Scripting-Language__python__introduction__part-3.json__README.md]
Usage¶
Volume mounting is essential for development workflows as it allows developers to use their preferred local editors and tools to write code, while immediately testing that code inside the isolated container environment.^[400-devops__09-Scripting-Language__python__introduction__part-3.json__README.md]
For example, a developer can mount their current working directory (${PWD}) into a container's workspace (e.g., /work).^[400-devops__09-Scripting-Language__python__introduction__part-3.json__README.md]
Implementation¶
In Docker, this functionality is typically implemented using the -v or --volume flag when running a container^[400-devops__09-Scripting-Language__python__introduction__part-3.json__README.md].
Syntax Examples¶
The general syntax involves passing the source path (host) and the destination path (container) to the docker run command^[400-devops__09-Scripting-Language__python__introduction__part-3.json__README.md].
To mount the current directory to /work:
docker run -v ${PWD}:/work <image_name> <command>
This setup ensures that any files created or modified inside the container at /work are persisted on the host machine, effectively bypassing the container's temporary file system layer^[400-devops__09-Scripting-Language__python__introduction__part-3.json__README.md].