Check out the [config](./config) template file. You may provide it when asked during `jlmkr create` or, if you have the template file stored on your NAS, you may provide it directly by running `jlmkr create myincusjail /mnt/tank/path/to/incus/config`. Then check out [First steps with Incus](https://linuxcontainers.org/incus/docs/main/tutorial/first_steps/).
Incus web GUI should be running on port 8443. Create new instance, call it `desktop`, and choose the `Ubuntu jammy desktop virtual-machine ubuntu/22.04/desktop` image.
To access files from the TrueNAS host directly in a VM created with incus, we can use virtiofs.
```bash
incus config device add desktop test disk source=/home/test/ path=/mnt/test
```
The command above (when ran as root user inside the incus jail) adds a new virtiofs mount of a test directory inside the jail to a VM named desktop. The `/home/test` dir resides in the jail, but you can first bind mount any directory from the TrueNAS host inside the incus jail and then forward this to the VM using virtiofs. This could be an alternative to NFS mounts.
### Benchmarks
#### Inside LXD ubuntu desktop VM with virtiofs mount
root@desktop:/mnt/test# mount | grep test
incus_test on /mnt/test type virtiofs (rw,relatime)
root@desktop:/mnt/test# time iozone -a
[...]
real 2m22.389s
user 0m2.222s
sys 0m59.275s
#### In a jailmaker jail on the host:
root@incus:/home/test# time iozone -a
[...]
real 0m59.486s
user 0m1.468s
sys 0m25.458s
#### Inside LXD ubuntu desktop VM with virtiofs mount
To be able to create unprivileged (rootless) containers with incus inside the jail, you need to increase the amount of UIDs available inside the jail. Please refer to the [Podman instructions](../podman/README.md) for more information. If you don't increase the UIDs you can only create privileged containers. You'd have to change `Privileged` to `Allow` in `Security policies` in this case.
