Modifying Boot Menu

george1421

@mbarker dude, I said not to use pxelinux.0

Is this what you created the sym links to?

I have some paperwork (sorry real job) to take care of but I’ll be back soon to dig a bit deeper.

george1421

I wrote a tutorial a while ago about my experience with dnsmasq. I did not follow the one from the official fog wiki page but arrived at a working solution. In my case I did this with my home kit using my home firewall as the dhcp server and the fog server running dnsmasq. https://forums.fogproject.org/topic/6376/install-dnsmasq-on-centos-7
The efi section of my dnsmasq config file will only work if you are running the lastest dnsmasq.

Since then the dnsmasq group (not FOG) made upgrades to dnsmasq so that dnsmasq will deliver the proper boot file (undionly/ipxe.efi) depending on the computer asking for dhcp proxy info. This version of dnsmasq hasn’t made it into the linux distribution chains just yet. But right now you need to walk before you run.

mbarker

LOL oops that was after I saved it to try something…the symlink is to:

lrwxrwxrwx   1 root root     13 Sep 15 11:31 undionly.kpxe.0 -> undionly.kpxe

from dnsmasq conf (proper):

# Don't function as a DNS server:
port=0

# Log lots of extra information about DHCP transactions.
log-dhcp

# Dnsmasq can also function as a TFTP server. You may uninstall
# tftpd-hpa if you like, and uncomment the next line:
# enable-tftp

# Set the root directory for files available via FTP.
tftp-root=/tftpboot
# The boot filename.
dhcp-boot=undionly.kpxe.0


# rootpath option, for NFS
dhcp-option=17,/images

# kill multicast
dhcp-option=vendor:PXEClient,6,2b

# Disable re-use of the DHCP servername and filename fields as extra
# option space. That's to avoid confusing some old or broken DHCP clients.
dhcp-no-override

# PXE menu.  The first part is the text displayed to the user.  The second is the timeout, in seconds.
pxe-prompt="Press F8 for boot menu", 0

# The known types are x86PC, PC98, IA64_EFI, Alpha, Arc_x86,
# Intel_Lean_Client, IA32_EFI, BC_EFI, Xscale_EFI and X86-64_EFI
# This option is first and will be the default if there is no input from the user.
pxe-service=X86PC, "Boot from network", pxelinux

# A boot service type of 0 is special, and will abort the
# net boot procedure and continue booting from local media.
pxe-service=X86PC, "Boot from local hard disk", 0

dhcp-range=10.84.52.180,proxy

Sorry I saved the pxelinux line to test something out…and it failed, I wonder if it’s these particular versions of the init and bzimage files? perhaps it doesn’t jive with an older system - I’m gonna try another machine hang on

edit: I get the real job stuff too, I’m stick handling this and trying to sort out some Microsoft Licensing at the same time as I’m trying to fix a Wordpress install LOL

george1421

@mbarker Yeah, I would review my config file when you have a chance, but this line jumped out at me right way.

dhcp-boot=undionly.kpxe,,<fog_server_IP>

The fog server IP address should appear twice in your config file, you missed this one.

mbarker

I was literally just adding that into my config right now hold tight (it probably will solve the TFTP server IP prompt too :))

mbarker

@george1421

Still Kernel panic but no more prompt for a TFTP Server IP so one thing fixed lol

When the system loads past the menu I get
bzImage…ok
init.xz…ok

and then this is where the Kernel Panic happens…it just makes no sense to me

I have my dnsmasq almost identical to your .conf file (I’m on CentOS 6.8…)

Think I should try copying the known working bzimage and xint.xz files and see if that helps?

george1421

@mbarker Ok the next step is to ensure that we have the proper boot kernels.

https://fogproject.org/inits/init.xz
https://fogproject.org/inits/init_32.xz
https://fogproject.org/kernels/bzImage
https://fogproject.org/kernels/bzImage32

These links will download the latest (current) kernel and inits. They go in /var/www/html/fog/service/ipxe

Also when ipxe loads there is a version number and a hex number in parentheses, what is that hex number.

Just for clarity what device are you trying to pxe boot into fog? Is it configured for uefi or bios (legacy) mode?

I feel you have the dnsmasq part setup right now so we can rule that out as long as you have your links correct as I have defined them in the tutorial.

mbarker

@george1421
Hey I didn’t run away, just had a conference call to do…the device is a Lenovo T420 laptop with an Intel Series Ethernet Controller (I can’t recall the exact info on it).

When i re-loaded the images that you linked now I’m getting a kernel panic before the menu loads…same panic, earlier in the boot sequence.

Since I didn’t change anything for the “mode” I’m assuming it’s Legacy mode…

The TFTP service serves out the boot.php file but then it hangs, tries to get init.xz and bzImage, then throws a Kernel Panic at me -_-

Tom Elliott

@mbarker where is it loading the init from?

Where is it loading the kernel from? Is something passing pxelimux instead of the ipxe files?

mbarker

@Tom-Elliott
It’s loading them from /var/www/html/fog/service/ipxe/

Now what’s weird is unregistered hosts get to the menu OK but a registered host doesn’t …however still have the same Kernel Panic I did before…so frustrating lol

edit: figured this out by renaming init.xz, now when I try to get to anything from the menu it fails chainloading that file instead of the Kernel Panic (init.xz IS in my /tftpboot/ folder, but isn’t referenced in any config files to boot from there

Tom Elliott

That’s the issue.

The init’s and kernels should NOT be loading from tftpboot at all.

george1421

@mbarker Even before Tom posted, my intuition is telling me your FOG install is botched/been tweaked a little too much. I can’t explain why I feel this, but I can’t escape the thought you shouldn’t be having this level of difficulty getting this to work.

My recommendation would be to rename /var/www/html/fog to fog.old and /tftpboot to /tftpboot.old and then go back to the files you downloaded for FOG in the /bin directory and rerun the fog installer. That will put everything back to a known configuration. Once the installer is done then create the two links as I mentioned in my tutorial. Then reboot your fog server. Dnsmasq will still be setup so that part (that works) should be OK.

mbarker

@george1421

Here’s the process I did with Fog 1.3:

Installed FRESH Centos, updated, installed git, wget, nano, and disabled selinux

Downloaded and installed Fog 1.3

Upgraded PHP from 5.3.3 to PHP 5.5

Created 2 Usernames

Installed and configured dnsmasq

hid a couple of menu items

created an image for the host to image to

booted into the menu, and then ran into kernel panic problems

@Tom-Elliott

It is NOT loading from tftpboot at all, as I mentioned it’s loading from /var/www/html/fog/service/ipxe/

Something just tells me this isn’t worth the effort at this point. I really don’t know what to say, I don’t have another full day to waste messing about with this, re-installing Fog just isn’t an option since this will be the 4th time in the last week I’ve done and always ran into problems, so sounds as though I’m looking for another solution

george1421

@mbarker I understand your logic and decision to look elsewhere. If you decide to circle back to the FOG Project we will be here to help.

Just for my knowledge what hardware are you running the FOG server on. It has no bearing on your results other than I’m interested in the hardware setup.

Thiago

@mbarker
in a normal fog install, there is no init.xz in /tftpboot.
I think that maybe your install is very modified and this is causing some issues…
I know that it would be your thousandth installation, but when you got fog up and running, your effort will have been worthwhile.

I was looking for other tools, they exist but are not as productive as this.

Modifying Boot Menu

200

12.0k

17.3k

155.2k