Bind-mount: Host file system not same then jail files system

[PackElend]

Hello,
I'm a bit confused here as dir /mnt/SSD/jailmaker/jails/myjail/rootfs/home does not list the same as jlmkr exec myjail dir /home.
I started the jail with

startup=1
docker_compatible=1
gpu_passthrough_intel=0
gpu_passthrough_nvidia=0
systemd_nspawn_user_args=--network-macvlan=br8 --resolv-conf=bind-host --bind='/mnt/SSD/SysAdmin/tmp:/home'
# You generally will not need to change the options below
systemd_run_default_args=--property=KillMode=mixed --property=Type=notify --property=RestartForceExitStatus=133 --property=SuccessExitStatus=133 --property=Delegate=yes --property=TasksMax=infinity --collect --setenv=SYSTEMD_NSPAWN_LOCK=0
systemd_nspawn_default_args=--keep-unit --quiet --boot

so I would expect that I see TN: '/mnt/SSD/SysAdmin/tmp' in Jail: '/home' but when I browse the file system with either filebrowser or WinSCP I see the file created with filebrowser

root@truenas[~]# jlmkr exec myjail dir /home
neuer\ test.txt  ROHRKLASSEN\ ASME\ Anwendungen.pdf

dir /mnt/SSD/SysAdmin/tmp                
ROHRKLASSEN\ ASME\ Anwendungen.pdf  neuer\ test.txt

root@truenas[~]# dir /mnt/SSD/jailmaker/jails/myjail/rootfs/home
test_fs.txt

[Jip-Hop]

You have made /mnt/SSD/SysAdmin/tmp available at /home inside the jail. So files in the tmp dir will be available in the home dir from the perspective of the jail. Files that reside in /mnt/SSD/jailmaker/jails/myjail/rootfs/home will be 'hidden' from the perspective of the jail since you have mounted another directory over it (the tmp dir). Makes sense?

[PackElend]

It makes sense.
Only supprised that the jail is that well isolated, that the host does not see the mount into the jail (if my interpretation is right).

To see the files mounted into the jail with winSCP, I need to install an ftp or ssh server inside the jail isn't it?

[Jip-Hop]

I suppose so. But since files in the jail must also exist somewhere outside the jail I suppose you could just use the ssh server on the TrueNAS host to expose the desired /mnt/SSD/SysAdmin/tmp directory via sftp.

[PackElend]

That is true but sometimes it is helpful to see what the jail sees using a tool with a GUI