Project

General

Profile

Feature #809

Install CentOS 6 in a Jail on FreeBSD

Added by Daniel Curtis over 4 years ago. Updated about 4 years ago.

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

100%

Estimated time:
2.00 h
Spent time:

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

History

#1 Updated by Daniel Curtis over 4 years ago

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

#2 Updated by Daniel Curtis over 4 years ago

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

#3 Updated by Daniel Curtis about 4 years ago

  • Status changed from Resolved to Closed

Also available in: Atom PDF