Custom ISO (centos 6/7 ) installation issues.

[Quazz]

@csa You replaced APPEND with imgargs vmlinuz ?

[george1421]

Ok I see a red flag here.

What version of FOG are you running? What do you have set for dhcp option 67 {boot file}.

And to refer to your OP. Why does the top one work WITH imgargs and the bottom one does not if you replace append with imgargs? The only thing I see in the top one is you are calling out the kernel with linux then adding in the args.

[csa]

Team,
I tried all the following options but didn’t have any success. This is happening with any centos or RHEL distribution. With ubuntu “kernel, initrd and imgargs” are working like champ.
The issue seems to be unable to pass the following option through ipxe.
ramdisk_size=100000 ksdevice=eth0 root=/dev/rd/0 ip=dhcp
using imgargs or moving to initrd.

Option 1.

Error --> boots and complains on “ks=… No such file or directory”
Moved “ramdisk” before ks=. Errors out saying "ramdisk=100000… no such file or directory

:fog.centos
set path /fog/OS_IMAGES/CENTOS-6.8-DVD
set nfs_path /images/OS_IMAGES/CENTOS-6.8-DVD
kernel http://fogsrv/fog/OS_IMAGES/CENTOS-6.8-DVD/images/pxeboot/vmlinuz || read void
initrd http://fogsrv/fog/OS_IMAGES/CENTOS-6.8-DVD/images/pxeboot/initrd.img || read void
imgargs ks=http://fogsrv/fog/kickstarts/centos6.cfg ramdisk_size=100000 ksdevice=eth0 root=/dev/rd/0 ip=dhcp url --url http://10.0.28.24/fog/OS_IMAGES/CENTOS-6.8-DVD  || read void
boot || read void
goto start

Option II
Removed imgargs section and moved everything to “initrd” section. Boots further but errors out saying " Cannot open root device "(null) … Please append a correct “root=” boot option ". Which means its the options in initrd section are getting ignored.

:fog.centos
set path /fog/OS_IMAGES/CENTOS-6.8-DVD
set nfs_path /images/OS_IMAGES/CENTOS-6.8-DVD
kernel http://fogsrv/fog/OS_IMAGES/CENTOS-6.8-DVD/images/pxeboot/vmlinuz || read void
initrd http://fogsrv/fog/OS_IMAGES/CENTOS-6.8-DVD/images/pxeboot/initrd.img ks=http://fogsrv/fog/kickstarts/centos6.cfg ramdisk_size=100000 ksdevice=eth0 root=/dev/rd/0 ip=dhcp || read void
boot || read void
goto start

Thank you
Chakri

[Tom Elliott]

@csa I believe you need to move it to the “kernel” section, not the initrd

[csa]

@Tom-Elliott said in Custom ISO (centos 6/7 ) installation issues.:

@csa I believe you need to move it to the “kernel” section, not the initrd

Tom,
You are simply awesome. Yes moving all the options to kernel worked like a champ. So for RHEL / Centos the following ipxe configuration menu works

:fog.centos
set path /fog/OS_IMAGES/CENTOS-6.8-DVD
set nfs_path /images/OS_IMAGES/CENTOS-6.8-DVD
kernel http://fogsrv/fog/OS_IMAGES/CENTOS-6.8-DVD/images/pxeboot/vmlinuz ks=http://fogsrv/fog/kickstarts/centos6.cfg  ramdisk_size=100000 ksdevice=eth0 root=/dev/rd/0 ip=dhcp splash quiet – || read void
initrd http://fogsrv/fog/OS_IMAGES/CENTOS-6.8-DVD/images/pxeboot/initrd.img || read void
goto start

Thank you so much
Chakri

[csa]

With my special thanks to Tom Elliott and team. Please resolve this ticket.

Thank you
Chakri

[Tom Elliott]

@csa I think you could still use imgargs just call it before initrd. Glad it’s working though.

[Quazz]

@Tom-Elliott I think he simply forgot to put vmlinuz after imgargs.

[Tom Elliott]

@Quazz I don’t think the kernel has to be specified as its the args but I could be wrong

[Quazz]

@Tom-Elliott iPXE seems to claim it’s mandatory from what I can tell

http://ipxe.org/cmd/imgargs

But it does basically the same thing as what you said, so it doesn’t really matter.

[Tom Elliott]

@Tom-Elliott that said I think it does need the mode arg aka linux