Re:
>
> On 04/15/2015 10:04 AM, David Lee wrote:
> > The general issue. In the "%pre" section of the cobbler kickstart file we
> > have a snippet whose purpose is to check a detail of the client machine
> > and, if things are OK, set some variables and proceed as usual. This is
> > the normal case.
> >
> > But sometimes, particularly with new hardware types, we expect that check
> > to fail; we then want things to stop and print a decent error message.
> >
> > What would be much better is if that snippet itself could (a) produce error
> > messages on the main screen and (b) cleanly halt.
> >
> > Any thoughts? What have I missed?
>
> This is not a Cobbler question, as snippet is simply included in the
> automatic installation file (eg kickstart), but that's ok.
>
> Use --erroronfail
> (http://serverfault.com/questions/446428/how-to-make-kickstart-exit)
> and echo/return 1 in the snippet if your check fails.
Thanks, Alan.
My google searches (prior to sending my email) kept on coming up with that
page; it looked tantalisingly promising, but frustratingly incomplete.
Although it's the best thing I found in those searches, it still lacks a worked
example. I was also very surprised not to find any authoritative source (RHEL,
CentOS, etc.) in my searches.
Before my email, I had already tried something like it inside my bash "%pre"
(now "%pre --erroronfail"). The snippet includes:
if [ <something went wrong> ]
then
echo 'my error details'
exit 1
fi
But:
(a) the "echo" text doesn't appear on the main screen;
(b) it heads straight to a reboot, not to a "halted installation" as the
webpage had claimed.
If I now replace "exit 1" with "return 1", the "return 1" is invalid because
"return" is not valid in a simple bash script.
Does anyone actually possess a real example of this working? If they have,
then I will also willingly add any success to that webpage!
-- David Lee
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