Please reference below link from the official docker
Question:
As you can see, docker docs said, “The data doesn’t persist when that container is no longer running”.
But WHY the container didn’t remove the data when i stop the container?And this issue can be reproduced on different host.
- The data doesn’t persist when that container is no longer running, and it can be difficult to get the data out of the container if another process needs it.
- A container’s writable layer is tightly coupled to the host machine where the container is running. You can’t easily move the data somewhere else.
- Writing into a container’s writable layer requires a storage driver to manage the filesystem. The storage driver provides a union filesystem, using the Linux kernel. This extra abstraction reduces performance as compared to using data volumes, which write directly to the host filesystem.
