[CentOS-devel] Question about generating a spin of CentOS 7

Fabian Arrotin arrfab at centos.org
Fri Oct 31 14:10:46 UTC 2014


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On 31/10/14 14:56, Steven Falco wrote:
> On 10/31/2014 09:43 AM, Fabian Arrotin wrote: On 31/10/14 14:21,
> Steven Falco wrote:
>>>> On 10/31/2014 03:44 AM, Manuel Wolfshant wrote:
>>>>> On 10/31/2014 03:08 AM, Les Mikesell wrote:
>>>>>> On Thu, Oct 30, 2014 at 7:06 PM, Doug 
>>>>>> Wellington<ddw at rincon.com>  wrote:
>>>>>>>> Previously:
>>>>>>>>>> Might be simpler in the long run to make it a
>>>>>>>>>> 2-step process.  That is, do a minimal OS
>>>>>>>>>> install, then have a 2nd DVD or USB key that they
>>>>>>>>>> install after the base system with a script that
>>>>>>>>>> upgrades any existing rpms and installs the rest
>>>>>>>>>> of what you need.
>>>>>>>> 
>>>>>>>> That adds an interesting set of questions.  Do I
>>>>>>>> somehow try to get the postinstall script to prompt
>>>>>>>> for it?  Do I try to create something similar to
>>>>>>>> firstboot that would prompt for the second disc after
>>>>>>>> the reboot?  Do I just list it in the install docs?
>>>>>>>> Right now the install docs are "1) Boot from DVD; 2)
>>>>>>>> Choose system from menu."  I'd like to keep it that
>>>>>>>> simple.
>>>>>>>> 
>>>>>>>> Seems like I'd still have to create an appropriate 
>>>>>>>> comps.xml file for whatever was on the second disc
>>>>>>>> anyway, so why not just create everything on the
>>>>>>>> first/only disc to begin with?  Also, I always copy
>>>>>>>> all of the RPMs into a local repository (e.g.
>>>>>>>> /opt/repos/centos6u4) and run createrepo on it.
>>>>>>>> Having one comps.xml file that works for both the
>>>>>>>> installation disc and the installed repository keeps
>>>>>>>> things clean...
>>>>>>>> 
>>>>>> Is it really too complicated for the 'hands-on' guy to
>>>>>> log in as root,
>>>>> You'd be surprised. There might not exist a "hands-on guy"
>>>>> able to do anything more advanced than "insert disc in
>>>>> cd-drive, boot system". Been there, had to deal with that.
>>>>> I even had to deal with the question "What does boot mean
>>>>> ?'
>>>> 
>>>> This thread has taken an interesting turn, but I'd like to
>>>> try to bring it back to my original question:
>>>> 
>>>> How can I build a variation on the official DVD, including 
>>>> generating the embedded LiveOS image; i.e., the rootfs.img
>>>> file?
>>>> 
> 
> Well, I haven't read the whole requirements list you probably 
> described earlier, but have you already had a look at lorax ? It
> was written for such particular case normally : 
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-image-installation-automatic.html
>
> 
>> Thank you!  I will give that procedure a try and report my 
>> results.
> 
>> Can you confirm whether this is the procedure used by the 
>> official CentOS build scripts?
> 

No, I don't think so, as one has to buid the vmlinuz/initrd.img and
other bits before being able to respin such variant .. but that's not
what you asked for iirc :-)

- -- 

Fabian Arrotin
The CentOS Project | http://www.centos.org
gpg key: 56BEC54E | twitter: @arrfab
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