Carry #11675
Aside from what #11675 says, to me a key usecase for this is to support
more than one Docker cli running at the same time but each may have its
own set of config files.
Signed-off-by: Doug Davis <dug@us.ibm.com>
DeviceMapper must be explicitly selected because the Docker binary might not be linked to the right devmapper library.
With this change, Docker fails fast if the driver detection finds the devicemapper directory but the driver is not the default option.
The option `override_udev_sync_check` doesn't make sense anymore, since the user must be explicit to select devicemapper, so it's being removed.
Docker fails to use devicemapper only if Docker has been built statically unless the option was explicit.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Adding in other areas per comments
Updating with comments; equalizing generating man page info
Updating with duglin's comments
Doug is right here again;fixing.
Signed-off-by: Mary Anthony <mary@docker.com>
Doug Davis