Are Jails a clone of a snapshot?

[francisaugusto]

Hi,

I was trying to tidy up my snapshot lists, so I see some snapshots related to jails I don't use anymore. I tried to delete them, but I got a message that there were clones of them. I then realized that those clones were actually where the jails are mounted:

Code:

root@freenas[~]# zfs list -o name,origin | egrep ".@."
\LivNAS/iocage/jails/ELK/root                                  LivNAS/iocage/releases/11.2-RELEASE/root@ELK
LivNAS/iocage/jails/Transmission/root                         LivNAS/iocage/releases/11.2-RELEASE/root@Transmission

So trying to remove LivNAS/iocage/releases/11.2-RELEASE/root@ELK for example was not possible.

Is this how it is supposed to be?

Best,

Francis

 

[Kris Moore]

That is correct, jails/plugins are all ZFS clones of an initial snapshot of 11.2-RELEASE, 11.3-RELEASE, etc.

 

[francisaugusto]

That is correct, jails/plugins are all ZFS clones of an initial snapshot of 11.2-RELEASE, 11.3-RELEASE, etc.

Thanks @Kris Moore! Now it makes sense that I can't delete that snapshot when the jail is still there. :)