How to install java in jail and mount procfs and fdescfs?

[testcb00]

Today I want to test a java program in jail.
My TrueNAS version is TrueNAS-12.0-U2.1 and jail is a Clone Jail (12.2 RELEASE).

After the creation, I use those command to install the Java Runtime Environment

Code:

pkg update
pkg install vim wget openjdk11-jre

After the install, the post-install note remind me to do the follow settings.

Code:

======================================================================

This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd and
procfs(5) mounted on /proc.

If you have not done it yet, please do the following:

    mount -t fdescfs fdesc /dev/fd
    mount -t procfs proc /proc

To make it permanent, you need the following lines in /etc/fstab:

    fdesc   /dev/fd      fdescfs       rw    0    0
    proc    /proc        procfs        rw    0    0

======================================================================

I have done a research and found an old solution.

Little over my head. Hoping to get Unifi Controller installed in FreeNAS.

You probably are root. If you are don't use sudo. It will not be found. I've made a fresh jail for testing and then I did this: pkg update pkg upgrade portsnap fetch update #this gives an error. Extract portsnap first portsnap extract portsnap fetch update #portsnap is up to date. cd...

www.truenas.com

The solution require me to mount the filesystem from Host but I am not sure if I can follow the solution directly as the Jail Manager is bhyve in TrueNAS.

Any suggestion are welcome. Thank you.

 

[Jurgen Segaert]

The easiest way is to do this from the command line:

Code:

iocage stop <your-jail>
iocage set mount_fdescfs=1 <your-jail>
iocage set mount_procfs=1 <your-jail>
iocage start <your-jail>

Once you've set these iocage jail properties, the system will automatically mount every time you start your jail.

It is also possible to do this via the Web UI in FreeNAS 11.3, but this functionality was removed in TrueNAS 12 as per:

https://jira.ixsystems.com/browse/NAS-110789