• Add a drop-in file for the zfs-import-cache service

  $ sudo systemctl edit zfs-import-cache.service

• Add dependencies

  [Unit]
  Requires=open-iscsi.service iscsi.service
  After=open-iscsi.service iscsi.service

Beginner users could not know that the easiest way to replicate a whole pool is to use the zfs send/receive tool.
You have just to create a snapshot and send it to the new pool. All the previous snapshots will be sent preserving dates and names.

zfs send -R MY_OLD_POOL@MY_LATEST_SNAPSHOT | zfs receive -F MY_NEW_POOL

# apt install --yes debootstrap gdisk dpkg-dev linux-headers-$(uname -r) \
  git-buildpackage build-essential dkms libaio-dev \
  libattr1-dev libelf-dev libblkid-dev libselinux1-dev libssl-dev \
  libudev-dev python3-cffi python3-setuptools python3-sphinx \
  python3-all-dev uuid-dev zlib1g-dev
# git clone https://salsa.debian.org/zfsonlinux-team/zfs.git
# cd zfs
# git checkout pristine-tar
# git checkout master
# gbp buildpackage -uc -us
# cd ..
# dpkg --install \
  libnvpair1linux_0.8.1-4_amd64.deb \
  libuutil1linux_0.8.1-4_amd64.deb \
  libzfs2linux_0.8.1-4_amd64.deb \
  libzpool2linux_0.8.1-4_amd64.deb \
  zfs-dkms_0.8.1-4_all.deb \
  zfsutils-linux_0.8.1-4_amd64.deb \
  zfs-zed_0.8.1-4_amd64.deb
# modprobe zfs

This command works with the volume, not the pool. You will need to execute it for every volume if you pool has more than one.

sudo zpool online -e zpool-docker nvme-Amazon_Elastic_Block_Store_volxxxxxxxxx