If I create a volume using the volume API, so “docker create volume…”, is it possible to push it to a registry? If not, how can I backup this volume. I can’t find any documentation on it, only on data containers.
Not today unfortunately – you would need to do something like docker cp or use a volume shared between containers and then send the backed-up data to S3.
See my post We can't push a docker volume so now what?
I explain how you can achieve a similar result. we are doing it succesfully