[CentOS] Building a live CD and live PXE

[Johnny Hughes]

On Sat, 2006-08-12 at 06:21 -0500, Johnny Hughes wrote:
> On Sat, 2006-08-12 at 07:51 -0300, Eduardo Grosclaude wrote:
> > 
> > 
> > On 8/12/06, Johnny Hughes <mailing-lists at hughesjr.com> wrote:
> >         On Fri, 2006-08-11 at 15:49 +0100, Ron Yorston wrote:
> >         > "Eduardo Grosclaude" <eduardo.grosclaude at gmail.com> wrote:
> >         > >Great! I was just looking for this! Unfortunately there
> >         seems to be 
> >         > >something missing: by the time we run the first yum
> >         command, there's no
> >         > >distroverpkg package installed under $LIVE to query for
> >         $releasever.
> >         > >---------------
> >         > >Should the user install centos-release RPM with prefix
> >         equal to $LIVE 
> >         > >beforehand?
> >         > >Or is there any other easy but correct way to pass this
> >         variable to yum?
> >         >
> >         > I got around this by editing my yum repo files to replace
> >         $releasever
> >         > with 4.  Which is horrible, so I too would like to know if
> >         there's a 
> >         > better way.
> >         >
> >         > I still can't get it to work, though.  I do get about 90MB
> >         of stuff
> >         > installed, as promised, but there are lots of '%post(...)
> >         scriptlet
> >         > failed' messages during the installation.  Although many
> >         things are 
> >         > installed into the chroot area there are clearly some things
> >         missing.
> >         > The first command I typed in the chroot was 'ls',
> >         but /bin/ls isn't
> >         > there even though, according to yum.log, coreutils was
> >         installed. 
> >         >
> >         > Actually, I was able to scroll back far enough to see this
> >         during the
> >         > installation:
> >         >
> >         > error: %pre(coreutils-5.2.1-31.2.i386) scriptlet failed,
> >         exit status 255
> >         > error:   install: %pre scriptlet failed (2), skipping
> >         coreutils-5.2.1-31.2
> >         >
> >         > Ron
> >         
> >         If you can install centos-release into the chroot, it should
> >         then return
> >         4.
> >         
> >         Or editing the yum repo file and addding 4 is OK.
> > 
> > I downloaded the latest centos-release rpm and tried to install it
> > into $LIVE with rpm relocate feature. This has to be done with --force
> > as rpm thinks it is already installed. Despite the rpm being "no
> > relocatable" as per "rpm -qpi", this works, populating $LIVE/etc and
> > friends. 
> > However, after this, yum keeps giving the same error as before. 
> > 
> > 
> > Brutally replacing $releasever by "4" in CentOS-Base.repo seems to
> > convince yum to work.
> > But then doing "yum -c $LIVE/etc/yum.conf --installroot=$LIVE install
> > centos-release" proceeds to _install_ the same package that rpm had
> > previously _installed_... hmmmm... :P
> > 
> > -- 
> 
> when using RPM to install centos-release initially ... use the --root
> function like this:
> 
> rpm -ivh --root $LIVE centos-release
                                      ^^^^^^^ - here would go the rest
of the rest of the rpm name :)

> That SHOULD work.
> 
> I haven't studied John's scripts .. but also important is properly
> mounting /dev, /proc, /sys into the chroot as well.

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