[Fedora-livecd-list] RHEL Live CD + Persistance?

[Mike Dickson]

Thanks, I will use this one.

MikeD

On Fri, 2007-12-14 at 13:22 -0600, Douglas McClendon wrote:

> Mike Dickson wrote:
> > Is there any chance of getting a current version of RHEL into the Live 
> > CD + Persistence game?
> 
> Were you ever able to test those patches I sent you a couple months back
> (on fedora)?  (and for the most part, posted to this list)
> 
> For me, they do basically work in trivial testing scenarios.
> 
> The main problem I have mustering any enjoyment developing them is the
> utter grossness of what it takes to patch the standard /etc/rc.d/init.d
> halt and functions file.  (which is needed to defer unmounting of
> persistence device until after readonly remounting of rootfs).
> 
> I do have an alternate distribution method of the feature, which makes
> it more of a proof of concept "live iso patch" to the official f8
> livecd, but it's still the same code and mechanism.
> 
> The same fragility may still apply to my method that I mentioned months
> ago, i.e. that it may become unrecoverably corrupted if not shutdown
> cleanly.  But I suspect that if I can make the distribution of it as
> easy as a 'patch' to apply to the f8 livecd, and get some testers, that
> that problem can be solved (pure speculation).
> 
> My time estimates are usually overly ambitious, but I'll try to get that
> iso-patch posted in a couple hours.
> 
> And as I responded long ago to the original criticism of the ugliness of
> the halt&functions patching- I totally agree, and am open to suggestions.
> 
> Attached is the last patch I sent Mike, which is pretty close to what I
> last posted to this list.  It's still useful if anyone is interested in
> trying to understand the method I'm using.  The main thing to simplify
> reading it, is
> 
> a) ignore the 'overlay=auto' code path.  It's a nice feature, but
> complexity that should wait for the future when the base case is well
> understood, tested and stable.  The base case being
> 
> b) assume the only use of the patch is with the modified
> livecd-iso-to-disk.  I.e. the new usage would be
> 
> livecd-iso-to-disk --overlay-size-mb 128 /path/to/f8.iso /dev/sdb1
> 
> which would initialize a 128M persistence file and cause the bootloader
> on the liveusb to use it.  I.e. the syslinux append line goes from
> 
> root=UUID=abcd-1234
> 
> to
> 
> root=UUID=abcd-1234 overlay=UUID=abcd-1234
> 
> Then, try to ignore the horrendously ugly selinux magic act required to
> patch halt&functions, and just look at the contents of the halt.patch
> and functions.patch.
> 
> -dmc
> 
> --
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