Example of copy data to a new cluster from an from old cluster. https://getcarina.com/docs/tutorials/migrate-cluster/

migrate-data-to-new-cluster.sh

$ eval $(carina env old)

$ export DOCKER_CERT_PATH_OLD=$DOCKER_CERT_PATH
$ export DOCKER_HOST_OLD=$DOCKER_HOST
$ export DOCKER_VERSION_OLD=$DOCKER_VERSION

$ eval $(carina env new)

$ docker create --name old-swarm-data --volume /etc/docker cirros

$ tar -c -C "$DOCKER_CERT_PATH_OLD" . | docker cp - old-swarm-data:/etc/docker/

$ docker create --name webvolume --volume /var/www/ --volume /etc/apache2 --volume /etc/ssl cirros

$ docker run --rm \
  --env DOCKER_HOST=$DOCKER_HOST_OLD \
  --env DOCKER_VERSION=$DOCKER_VERSION_OLD \
  --env DOCKER_TLS_VERIFY=1 \
  --env DOCKER_CERT_PATH=/etc/docker \
  --volumes-from webvolume \
  --volumes-from old-swarm-data \
  --workdir /var \
  docker:$DOCKER_VERSION_OLD \
  /bin/sh -c "docker cp webvolume:/var/www/ - | tar -x"

$ docker run --rm -it --volumes-from webvolume cirros ls /var/www
1.txt
2.txt
html

$ docker run --rm -it --volumes-from webvolume cirros ls /var/www/html
index.html

test-data-on-old-cluster.sh

# This is just for test data on the old cluster

$ eval $(carina env old)

$ docker create --name webvolume --volume /var/www/ --volume /etc/apache2 --volume /etc/ssl cirros

$ docker run --rm --volumes-from webvolume cirros /bin/sh -c "echo '1' > /var/www/1.txt"
$ docker run --rm --volumes-from webvolume cirros /bin/sh -c "echo '2' > /var/www/2.txt"
$ docker run --rm --volumes-from webvolume cirros /bin/sh -c "mkdir /var/www/html"
$ docker run --rm --volumes-from webvolume cirros /bin/sh -c "echo 'hello world' > /var/www/html/index.html"

$ docker run --rm --volumes-from webvolume cirros ls /var/www
1.txt
2.txt
html

$ docker run --rm --volumes-from webvolume cirros ls /var/www/html
index.html