Unclear how to create dataset

[backupandforkacc]

I am not sure how to use the plugin.

~$ docker volume create testsimon
creates the volume, but no dataset.

The example from github leads to an error:

~$ docker volume create -d zfs -o compression=lz4 -o dedup=on --name=rpool/docker/testsimon
Error response from daemon: create rpool/docker/testsimon: error looking up volume plugin zfs: plugin "zfs" not found

It seems correctly installed:

~$ systemctl list-unit-files --type=service | grep docker-zfs-plugin
docker-zfs-plugin.service                  enabled         enabled

$ ls -lh /usr/local/bin/ | grep zfs
-rw-r--r-- 1 root root 11M Feb  5 09:32 docker-zfs-plugin

[backupandforkacc]

I first created the dataset rpool/docker/testsimon, so this is there. Also downloaded the plugin again and put it in /usr/local/bin/, but still get the error.

When I have a look at the status of the service, it says:

$ systemctl status docker-zfs-plugin.service
○ docker-zfs-plugin.service - zfs plugin
     Loaded: loaded (/etc/systemd/system/docker-zfs-plugin.service; enabled; vendor preset: enabled)
     Active: inactive (dead)
  Condition: start condition failed at Thu 2023-02-09 17:03:18 CET; 7min ago

Feb 08 08:21:22 simon-itx systemd[1]: Condition check resulted in zfs plugin being skipped.
Feb 08 10:31:00 simon-itx systemd[1]: Condition check resulted in zfs plugin being skipped.
Feb 09 17:03:18 simon-itx systemd[1]: Condition check resulted in zfs plugin being skipped.

[UntouchedWagons]

You have to edit the ConditionPathIsMountPoint line in docker-zfs-plugin.service to reflect where your dataset is mounted.

In my case I have

[Unit]
Description=zfs plugin
After=zfs-mount.service zfs-import-cache.service
Before=docker.service
Requires=zfs-mount.service zfs-import-cache.service

#Recommended condition for each pool you intend to use
ConditionPathIsMountPoint=/mnt/docker/volumes


[Service]
ExecStart=/usr/local/bin/docker-zfs-plugin --dataset-name docker/volumes

[Install]
WantedBy=docker.service

I changed the docker pool's mountpoint to /mnt/docker then made a dataset just for volumes.

Then my docker compose is like so:

volumes:
  data:
    name: "docker/volumes/openspeedtest"
    driver: "zfs"
    driver_opts:
      atime: "off"