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chroot to a different OS

  • 02-11-2007 12:24pm
    #1
    Khannie
    Registered Users, Registered Users 2 Posts: 37,485 ✭✭✭✭


    I use linux for dev and I'm trying to avoid the overhead of a virtual machine for testing.

    Just wondering if there's any sane way to do this:

    Install ubuntu 64bit as my base OS to partition A (let's say /dev/sda1) then install RHEL4 64bit to /dev/sda2, boot my ubuntu installation then mount /dev/sda2 and run a chroot'd environment to give me what is effectively a RHEL4 box for a specific user.

    I know that I'd be using the ubuntu kernel as the chroot'd user, but other than that, what other problems would this throw up? And is there any way around said problems?


Comments

  • #2
    Catch_22
    Registered Users, Registered Users 2 Posts: 432 ✭✭Catch_22


    any dynamic libraries you attemt to load after the chroot will come from the redhat install so if the kernel versions arenet exactly the same there may well be issues.

    Also this is not in any going to be useful for test purposes - there is no way to gaurentee that this kind of setup will in anyways replicate the actual environment experienced by a redhat user which reducces the value of any test significantly.

    is a VM that much of an overhead to you ?


  • #3
    djmarkus
    Registered Users, Registered Users 2 Posts: 1,606 ✭✭✭djmarkus


    Get Virtualbox, the method described wouldnt work because /sys /proc or /dev wont be valid in the chroot


  • #4
    Khannie
    Registered Users, Registered Users 2 Posts: 37,485 ✭✭✭✭Khannie


    Thanks for the replies lads.
    Catch_22 wrote: »
    is a VM that much of an overhead to you ?

    Well....I wont be the only person using it. The box I'm running on isn't the highest spec in the world, and the vmware reduces its throughput significantly.

    I like the look of this virtualbox malarky. Do you know if it supports hardware virtualisation?

    edit: Looking at the hardware kvm support for ubuntu. I suppose that's probably the most lightweight way to go.


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