Very different layout -- RE: How the Centos 5.0's kickstart initrd.img is build??

[John Summerfield]

Guolin Cheng wrote:
> Hi,
> 
>  
> 
>  I've tried run mkinitrd to create an initrd.img file for Centos 5
> Kickstart, but it turns out that the default initrd.img is quite
> different from the initrd.img file created with mkinitrd. Any one know
> how to create a Kickstart initrd.img with custom kernel? Or the hacking
> steps on a existing Centos 5 kickstart initrd.img?
> 
>  
> 
> root at Centos5TestBox aaa]# ls -alF original mkinitrd/
> 
> mkinitrd/:
> 
> total 40
> 
> drwxr-xr-x 9 root root 4096 May 30 17:22 ./
> 
> drwxr-xr-x 4 root root 4096 May 30 17:29 ../
> 
> drwx------ 2 root root 4096 May 30 17:22 bin/
> 
> drwx------ 3 root root 4096 May 30 17:22 dev/
> 
> drwx------ 2 root root 4096 May 30 17:22 etc/
> 
> -rwx------ 1 root root 1833 May 30 17:22 init*
> 
> drwx------ 2 root root 4096 May 30 17:22 lib/
> 
> drwx------ 2 root root 4096 May 30 17:22 proc/
> 
> lrwxrwxrwx 1 root root    3 May 30 17:22 sbin -> bin/
> 
> drwx------ 2 root root 4096 May 30 17:22 sys/
> 
> drwx------ 2 root root 4096 May 30 17:22 sysroot/
> 
>  
> 
> original:
> 
> total 52
> 
> drwxr-xr-x 11 root root 4096 May 30 17:21 ./
> 
> drwxr-xr-x  4 root root 4096 May 30 17:29 ../
> 
> -rw-r--r--  1 root root   62 May 30 17:21 .buildstamp
> 
> -rw-r--r--  1 root root  123 May 30 17:21 .profile
> 
> lrwxrwxrwx  1 root root    4 May 30 17:21 bin -> sbin/
> 
> drwxr-xr-x  2 root root 4096 May 30 17:21 dev/
> 
> drwxr-xr-x  3 root root 4096 May 30 17:21 etc/
> 
> lrwxrwxrwx  1 root root   10 May 30 17:21 init -> /sbin/init*
> 
> drwxr-xr-x  2 root root 4096 May 30 17:21 modules/
> 
> drwxr-xr-x  2 root root 4096 May 30 17:21 proc/
> 
> drwxr-xr-x  2 root root 4096 May 30 17:21 sbin/
> 
> drwxr-xr-x  2 root root 4096 May 30 17:21 selinux/
> 
> drwxr-xr-x  2 root root 4096 May 30 17:21 sys/
> 
> drwxr-xr-x  2 root root 4096 May 30 17:21 tmp/
> 
> drwxr-xr-x  6 root root 4096 May 30 17:21 var/
> 
> root at hello11 aaa]#
> 
>  
> 
> --Guolin
> 
>  
> 
> ________________________________
> 
> From: kickstart-list-bounces at redhat.com
> [mailto:kickstart-list-bounces at redhat.com] On Behalf Of Guolin Cheng
> Sent: Wednesday, May 30, 2007 4:45 PM
> To: centos at centos.org; Discussion list about Kickstart
> Subject: How the Centos 5.0's kickstart initrd.img is build??
> 
>  
> 
> Hi,
> 
>  Any one know how the Centos 5 kickstart initrd.img was built? I'll be
> very appreciated if any light can be shed on this topic. The basic
> problem to be solved here is:  how to build a custom vmlinuz+initrd.img
> for Centos 5 kickstart with my own custom built kernel?
> 
>  I am not sure mkinitrd is the right tool for this purpose? If do, which
> are the modules I should include with '-preload' options? And if there
> are any extra files/steps I should include/follow for the initrd.img
> file? Not sure how the stage2.img is loaded by kernel after initrd.img
> is loaded and run. Please help.


Last time I created an initrd for EL, I hacked on an existing one by 
ungzipping it, then unpacking with cpio.

To put it back together, I used cpio and didn't bother compressing it.

Worked fine, should work here. I forget what I was kickstarting, may 
well have been an EL5 beta.




-- 

Cheers
John

-- spambait
1aaaaaaa at coco.merseine.nu  Z1aaaaaaa at coco.merseine.nu

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