Re: Remote upgrade of 4.X-5.3-Stable

From: Clifton Royston (cliftonr_at_lava.net)
Date: 02/25/05

  • Next message: Ashwin Chandra: "sched_4bsd.c Quantum change" 
    Date: Thu, 24 Feb 2005 14:34:00 -1000
To: freebsd-hackers@freebsd.org

    On Thu, Feb 24, 2005 at 12:01:08PM +0000, freebsd-hackers-request@freebsd.org wrote:
    > Date: Wed, 23 Feb 2005 17:06:02 +0000
    > From: Wouter van Rooij <aentgood@gmail.com>
    > Subject: Remote upgrade of 4.X-5.3-Stable
    > To: freebsd-hackers@freebsd.org
    > Message-ID: <7603e5d8050223090633360cc1@mail.gmail.com>
    > Content-Type: text/plain; charset=US-ASCII
    >
    > You did a make buildworld?
    > You just have to boot in single user mode and run mergemaster -p and
    > mergemaster.

      This doesn't work for the remote update case without physical console
    access, which he's asking about. Once the machine comes up in single
    user mode, sshd is not running and there's no way to get into it.

      Sorry to belabor the obvious.

      I believe that what's really needed here is to replicate some magic
    that is done on the first boot after installing FreeBSD on a system.
    IIRC, there's a special one-time invocation of an rc file - I think
    after a quick check of /etc/rc that it's rc.early that I'm thinking of.

      You can put commands in here which are run very early on following
    the first automatic boot into multi-user of the system, after all
    virtual drives are "assembled" but before filesystems are checked and
    mounted. If all steps of your upgrade script succeed, you can then at
    the end have the rc.early file rename itself (so it won't run on the
    next boot) sync the root file system, and reboot again.

      Obviously you want to test this very carefully, because in a remote
    environment you will probably get just one shot at having it work
    correctly; but hopefully this puts you on a workable path.
      -- Clifton 

    -- 
          Clifton Royston  --  cliftonr@tikitechnologies.com 
         Tiki Technologies Lead Programmer/Software Architect
"I'm gonna tell my son to grow up pretty as the grass is green
And whip-smart as the English Channel's wide..."
                                                   -- 'Whip-Smart', Liz Phair
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