Re: [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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