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Feature #809

Install CentOS 6 in a Jail on FreeBSD

Added by Daniel Curtis almost 8 years ago. Updated almost 8 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Daniel Curtis
Category:
Jails / Containers
Target version:
FreeBSD 10
Start date:
05/13/2016
Due date:
% Done:

100%

Estimated time:
2.00 h
Spent time:
4.00 h

Description

This is a guide on how I setup CentOS 6 in a jail on FreeBSD 10.2.

Prepare the Environment

  • Make sure the system is up to date:
    pkg update && pkg upgrade
  • Load the necessary kernel modules:
    kldload linux fdescfs linprocfs linsysfs tmpfs
  • Set the linux version compatibility:
    echo "compat.linux.osrelease=2.6.18" >> /etc/sysctl.conf
sysctl compat.linux.osrelease=2.6.18
  • Install the centos linux base:
    pkg install linux_base-c6

Create the CentOS Jail

  • Download the precreated centos filesystem:
    fetch http://download.openvz.org/template/precreated/centos-6-x86.tar.gz
  • Create the centos jail directory:
    mkdir /usr/jails/centos6.example.com
  • Unpack the centos filesystem into the centos6.example.com jail folder:
    tar xf centos-6-x86.tar.gz -C /usr/jails/centos6.example.com
  • Mount the necessary virtual file systems into the jail’s root directory:
    mount -t linprocfs /usr/jails/centos6.example.com/linprocfs /usr/jails/centos6.example.com/proc
mount -t linsysfs /usr/jails/centos6.example.com/linsysfs /usr/jails/centos6.example.com/sys  
mount -t devfs /usr/jails/centos6.example.com/devfs /usr/jails/centos6.example.com/dev
  • Configure the jail in /etc/jail.conf:
    vi /etc/jail.conf
    • And add the following to the end of the file:
      centos6 {
  path   = /usr/jails/centos6.example.com;
  mount.devfs;
  mount.fdescfs;
  mount.procfs;
  host.hostname = centos6.example.com;
  ip4.addr = 192.168.1.202;
  interface = em0;
  exec.start = "/bin/sh /etc/rc.d/rc 3";
  exec.stop = "/bin/sh /etc/rc.d/rc 0";
  mount.fstab = "/usr/jails/fstab_centos6";
}
  • Write some basic CentOS configuration files:
    cp /etc/resolv.conf /usr/jails/centos6.example.com/etc/resolv.conf
echo "NETWORKING=yes" >> etc/sysconfig/network
echo "linproc /usr/jails/centos6.example.com/proc linprocfs rw 0 0" >> /usr/jails/fstab_centos6
echo "192.168.6.6 localhost localhost.localdomain localhost4 localhost4.localdomain4 centos6 centos6.example.com" >> /usr/jails/centos6.example.com/etc/hosts
  • Create the password database for the jail:
    cd /usr/jails/centos6.example.com/etc 
echo "root::0:0::0:0:Charlie &:/root:/bin/bash" > master.passwd
pwd_mkdb -d ./ -p master.passwd
  • Chroot into the centos6.examepl.com jail directory:
    chroot /usr/jails/centos6.example.com /bin/bash
    • And prepare the environment:
      cd /etc
pwconv
grpconv
passwd
touch /etc/fstab
touch /etc/mtab
cd /sbin
mv consoletype consoletype.orig
ln -s /bin/true consoletype
cd /bin
mv umount umount.prev
ln -s /bin/true umount
chkconfig httpd off
chkconfig ip6tables off
exit
  • Enable jails to start at boot:
    echo 'jail_enable="YES"' >> /etc/rc.conf
  • And start the jail
    service jail start centos6.example.com
  • Check that the jail is running:
    jls

Resources

#1

Updated by Daniel Curtis almost 8 years ago

  • Status changed from New to In Progress
  • % Done changed from 0 to 30
#2

Updated by Daniel Curtis almost 8 years ago

  • Description updated (diff)
  • Status changed from In Progress to Resolved
  • % Done changed from 30 to 100
#3

Updated by Daniel Curtis almost 8 years ago

  • Status changed from Resolved to Closed

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