Re: Live Upgrade for Linux

From: Kelly Sauke (ksauke@fastenal.com)
Date: 03/25/03

  • Next message: Alex Russell: "Re: Live Upgrade for Linux" 
    Date: Tue, 25 Mar 2003 14:20:27 -0600
From: Kelly Sauke <ksauke@fastenal.com>
To: Kelly Sauke <ksauke@fastenal.com>

    Maybe I need a little clarification of what Live Upgrade does. I've
    gotten a lot of response of what I would call installer utilities but
    not a Live Upgrade (if I'm wrong please point it out to me). What Live
    Upgrade does under solaris is it creates a complete alternate boot
    environment with a root /usr /var and any other filesystem you want.
    Then you can apply patches etc to this other boot environment and boot
    off of that. If there is something in the patch that doesn't work or
    screws up the machine, then you just reboot off the original boot
    environment and you're back to where you were before upgrading and still
    have access to the patched boot environment to fix it. Its great for
    upgrading production type servers because the 'back out plan' if you
    will is nothing more than reboot off the old boot environment. In other
    words you have 2 / filesystems, 2 /usr's, 2 /var's as well as 2
    kernels. Its a complete boot environment copy that you can do anything
    to and then just reboot off the new environment without having to touch
    the 'live' environment.

    For those that were asking, I'm running RedHat Advanced Server. I
    appreciate the responses.

    Thanks,
    Kelly

    Kelly Sauke wrote:

    > Does anyone know of any software for linux that acts similar to "Live
    > Upgrade" in Solaris or "Alternate Release Areas" in DG/UX?
    > I would find it very useful for upgrading and patching as well as
    > security audits to the applied OS "patches".
    >
    > Thanks,
    >
    > KS
    >

  • Next message: Alex Russell: "Re: Live Upgrade for Linux"

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