Docker – How the json-file Driver Works

The log is created in the path /var/lib/docker/containers/~/*, and linked in the path /var/log/container/*.

I wonder how the log of each POD occurs in the /var/lib/docker/containers/~/* path.
Also, I am wondering if it is right to use the json-file driver in an environment that collects logs with fluentD.

Source: StackOverflow