Create a Jail

Create a Jail

Replace <jailname> with the Name of your Jail

If you're using zfs, every jail should have it's own zfs pool

• Create a new zfs pool

zfs create zfs0/<jailname>

• Set the mountpoint option for the new zfs pool

zfs set mountpoint=/export/jails/<jailname> zfs0/<jailname>

• Mount the new Pool

zfs mount -a

If you're not using zfs, you should create a new folder for the Jail in /export/jails

mkdir /export/jails/<jailname>

Now, you can install the Jail

cd /export/jails/
bsdinstall jail <jailname>/

• Follow the steps on the screen until the installation is finished

It's time to edit /etc/jail.conf

vi /etc/jail.conf

• If there are already Jails installed at the host, create a new section for your Jail at the End of the file

<jailname> {
        host.hostname = "<jailname>.hateotu.de";
        ip4.addr = <ip the new Jail should have>;
}

• If there are no Jails installed, and so, the file is empty, paste the following content into the file

allow.raw_sockets = 0;
exec.clean;
exec.system_user = "root";
exec.jail_user = "root";
exec.start += "/bin/sh /etc/rc";
exec.stop = "/bin/sh /etc/rc.shutdown";
exec.consolelog = "/var/log/jail_${name}_console.log";
interface="bge0";
mount.devfs;
mount.fstab = "/etc/fstab.$name";
allow.mount;
allow.set_hostname = 0;
allow.sysvipc = 0;
path = "/export/jails/${name}";
<jailname> {
        host.hostname = "<jailname>.hateotu.de";
        ip4.addr = <ip the new Jail should have>;
}

• If the Jail needs special options to be set, you should enter them into the section of the Jail under the IP Adress:

<jailname> {
        host.hostname = "<jailname>.hateotu.de";
        ip4.addr = <ip the new Jail should have>;
        <option> = <value>
}

Create the fstab file for the new Jail

touch /etc/fstab.<jailname>

Now, you can start the new Jail

service jail start <jailname>

• To open a shell on your Jail, type:

jexec <jailname> <shell>