From iRedMail

Summary

This tutorial describes how to create a FreeBSD Jail with ezjail, and install the latest iRedMail in Jail.

We use hostname mx.example.com and IP address 172.16.122.244 for our Jail server.

Notes:

• This tutorial was tested with FreeBSD 9 and the latest ports tree, but it should work on FreeBSD 8 and 10 too.
• All backends available in iRedMail (OpenLDAP, MySQL, PostgreSQL) were tested, work like a charm. :)

Requirements

• iRedMail-0.8.3 or later releases.
• Port sysutils/ezjail for FreeBSD.

Preparation

Set a proper hostname and IP address for Jail server

We use hostname mx.example.com and internal IP address 172.16.122.244 for example. We created an alias IP address on network interface em0, so we have below setting in /etc/rc.conf for this IP address:

ifconfig_em0_alias0="inet 172.16.122.244 netmask 255.255.255.0"

# Settings for our Jail: mx.example.com.
jail_mx_example_com_hostname="mx.example.com"
jail_mx_example_com_ip="172.16.122.244"

Install sysutils/ezjail and add required settings

• Install ezjail with ports tree:

# cd /usr/ports/sysutils/ezjail/
# make install clean

• Enable Jail by adding below setting in /etc/rc.conf:

# Start ezjail while system start up
ezjail_enable="YES"

# Required by PostgreSQL, otherwise initializing database will fail.
jail_sysvipc_allow="YES"

• [OPTIONAL] Allow to use ping command inside Jail by adding below line in /etc/sysctl.conf:

security.jail.allow_raw_sockets=1

• Rebooting system is required after changing /etc/rc.conf.

# reboot

Create Jail

• After system start up, create the base jail that all jails we created later will use:

# ezjail-admin install -p

• create Jail for domain name mx.example.com, bound to internal IP address 172.16.122.244. All files are placed under /jails/mx.example.com:

# ezjail-admin create -r /jails/mx.example.com mx.example.com 172.16.122.244

• Set hostname of Jail in /jails/mx.example.com/etc/rc.conf:

hostname="mx.example.com"

• [OPTIONAL] Share /usr/ports/distfiles/ with Jail by adding below line in /etc/fstab.mx_example_com:
  • NOTE: Jail will set ports tree to /var/ports instead of /usr/ports in /jails/mx.example.com/etc/make.conf, you can either use it or change it to /usr/ports.

/usr/ports/distfiles /jails/mx.example.com/basejail/usr/ports/distfiles nullfs rw 0 0

• Start Jail.

# /usr/local/etc/rc.d/ezjail restart

• List all Jails:

# ezjail-admin list
STA JID  IP               Hostname                          Root Directory
--- ---- ---------------- --------------------------------- ------------------------
DS  1    172.16.122.244   mx.example.com                    /jails/mx.example.com

Install iRedMail

We can now enter this Jail:

# ezjail-admin console mx.example.com

• In Jail, update /etc/resolv.conf with valid DNS server address(es). For example:

nameserver 172.16.122.2

• In Jail, install binary package bash. Required by iRedMail.

Jail # pkg_add -r bash-static

• In Jail, Start iRedMail installer with your Jail ip address:

Jail # bash
bash # cd /root/iRedMail/
bash # LOCAL_ADDRESS='172.16.122.244' bash iRedMail.sh

That's all.