Failed to query for metadata size#

You must pull the MMT image to both your source MSR system and your target MSR system, otherwise the migration will fail with the following error message:

Failed to query RethinkDB for total metadata size: failed to convert query
response to int: strconv.Atoi: parsing "": invalid syntax
Continuing without total metadata size ...

To remedy this you must pull the MMT image to each of the two systems, using the following commands:

docker login registry.mirantis.com -u <username>
docker pull mirantis/mmt