[CentOS] livemedia-creator --make-pxe-live CentOS 7

ah ok,  I do that different, I use VNFS and Perceus, however it works 
basically the same, initially.

You would need to create a ramdisk, and the best way to do that is by 
using an existing one, unpack it, stick

the stuff you need in it, and pack it again. (I have notes about the 
details there, but not them with me right now)

The way a ramdisk is (un)packacked has changed. After you have that 
ramdisk, you mount the "rest" using NFS.

(so things like mount etc needs to be on your ramdisk.) Typically you 
want the kernel from your netboot/tftp to

start the PXE process, simply because it is smaller, and use it to load 
your ramdisk and kernel, as configured in

pxeconfig  (check the default file).


Ron


On 12/26/19 10:20 AM, Drew Weaver wrote:
> Oh, alright my specific issue is just about creating the actual pxe image.. not what happens after
>
> -----Original Message-----
> From: CentOS <centos-bounces at centos.org> On Behalf Of R C
> Sent: Thursday, December 26, 2019 12:18 PM
> To: centos at centos.org
> Subject: Re: [CentOS] livemedia-creator --make-pxe-live CentOS 7
>
> I have "issues" with later versions of Centos/RHEL 7 also.
>
> PXE boot seems to work, but after the new kernel kexec's, it seems to drop the NICS and
>
> further in the process for some reason, the nics never come up, which leads to all kindsof issues of course
>
> (trying to boot a cluster that way). I also have the impression that it is a dracut issue, however, I have not pinpointed it yet.
>
>
> Ron
>
>
> On 12/26/19 9:57 AM, Drew Weaver wrote:
>> Hello,
>>
>> I am trying to build a PXE boot image for CentOS 7.
>>
>> livemedia-creator --make-pxe-live --ks=ks --no-virt
>>
>> It runs the entire process and then it says:
>>
>> losetup: /dev/: detach failed: Inappropriate ioctl for device
>> 2019-12-26 11:49:47,293: Disk Image install successful
>> 2019-12-26 11:49:47,293: working dir is /var/tmp/tmpKwqC77
>> mount: /dev/loop0 is write-protected, mounting read-only
>> mount: unknown filesystem type '(null)'
>> 2019-12-26 11:49:52,301: Command '['mount', '-o', 'loop', '/var/tmp/diskJVpsJd.img', '/var/tmp/lorax.imgutils.OtV8Yh']' returned non-zero exit status 32
>>
>> I then tried it on CentOS 8 and had the same problem until I installed the dracut-live package but that package doesn't exist on CentOS 7.
>>
>> I will point out that it seems to work fine with make-iso, just not make-pxe-live. So there is probably a package it needs that I don't know about. Has anyone gotten this to work at all?
>>
>> Since it is a disk/image issue this is the part of the ks relevant to disks:
>>
>> # Disk partitioning information
>> reqpart
>> part / --fstype="ext4" --size=4000
>> part swap --size=1000
>> zerombr
>> clearpart --all
>> bootloader --location=mbr
>>
>> Below is my packages part of my kickstart:
>>
>> %packages
>> # Packages needed by anaconda, but not directly required.
>> # Includes all of the grub2 and shim packages needed, except
>> # for the grub2-efi-*-cdboot package
>> @anaconda-tools --optional
>> @core
>> anaconda
>> isomd5sum
>> kernel
>> memtest86+
>> syslinux
>> -dracut-config-rescue
>> dell-system-update
>> # This package is needed to boot the iso on UEFI
>> grub2-efi-*-cdboot
>> grub2-efi-ia32
>> %end
>>
>> Thanks,
>> -Drew
>>
>> _______________________________________________
>> CentOS mailing list
>> CentOS at centos.org
>> https://lists.centos.org/mailman/listinfo/centos
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