volume to volume

migrate.sh

# make tarball from sentry_pgdb volume
docker run --rm -v sentry_pgdb:/var/lib/postgresql/data -v (pwd):/backup busybox tar cvf /backup/backup.tar /var/lib/postgresql/data
# create a sentry-postgres volum
docker volume create sentry-postgres
# restore to sentry-postgres volume
# NOTE: tarball will keep absolute path folder structure, so we don't need specify the target extract path
docker run --rm -v sentry-postgres:/var/lib/postgresql/data -v (pwd):/backup busybox tar xvf /backup/backup.tar