another init.xz issue

[george1421]

@bmaster001 When you enter in debug mode none of the fog scripts have run. So the $web won’t be set until . /usr/share/fog/lib/funcs.sh has been called. I know it is confusing, but I ran into the same issue when developing the code snippet you posted.

$web should point to your fog server when its set. Actually <fog_server_ip>/fog (this comes from the kernel parameter in the GRUB config file). The funcs.sh script extracts the kernel parameters and then sets the bash variables to match the kernel parameters. Then my code calls the fog server to pick up the other dynamic kernel parameters than can’t be supplied by the static grub.cfg file. That is where the hostinfo.php comes in. The type variable is set by the hostinfo.php script, fwiw.

[bmaster001]

It’s a difficult mechanism to understand. A lot of unfamiliar technologies, scripts and boot-arguments working together. It’ll take a while for me to better understand it. But it’s a very interesting subject!

The very first line in the fog script is the call to funcs.sh. when I run that on the command line, and do set, I see no web variable:

_=/usr/share/fog/lib/funcs.sh
acpi=off
boottype=usb
consoleblank=0
has_usb_nic=1
init=/sbin/init
isdebug=yes
ismajordebug=0
loglevel=7
name=has_usb_nic
oIFS='
'
ramdisk_size=127000
root=/dev/ram0
rootfstype=ext4
value=1
var=has_usb_nic=1

[george1421]

@bmaster001 hey that’s cool (not).

Lets confirm that your grub.cfg has this line.

menuentry "1. FOG Image Deploy/Capture" {
 echo loading the kernel
 linux  $myimage loglevel=$myloglevel initrd=init.xz root=/dev/ram0 rw ramdisk_size=127000 keymap= web=$myfogip/fog/ boottype=usb consoleblank=0 rootfstype=ext4 isdebug=yes
 echo loading the virtual hard drive
 initrd $myinits
 echo booting kernel...
}

Note the kerenel parameter web=$myfogip/fog/

[edit] note web will only be there when you are in capture/deploy menu mode not in the debug mode from the menu entry.

[george1421]

@bmaster001 said in another init.xz issue:

It’s a difficult mechanism to understand. A lot of unfamiliar technologies, scripts and boot-arguments working together. It’ll take a while for me to better understand it. But it’s a very interesting subject!

I understand this (linux) is a alien world to most windows folks. But you see there IS a lot of magic that goes into make FOG functional and universal.

You have the unfortunate situation of having very strange hardware (maybe one of a kind) that make imaging difficult to manage. FOG has a lot of instruments in the band, its takes a bit of cohering to get them to all play the same tune.

[Sebastian Roth]

@bmaster001 said:

In that source you can see that the driver tries to get a MAC address from the EEPROM but if that fails, it generates a random one. I thought that it might help to know that it’s the driver who does this, and not some weird config option somewhere…

Great find! This is really unusual. Have never seen this before! Why would if not be able to read the MAC I wonder?!? Random MAC is kind of breaking the whole FOG logic of identifying hosts via MAC address.

[bmaster001]

@george1421 said in another init.xz issue:

[edit] note web will only be there when you are in capture/deploy menu mode not in the debug mode from the menu entry.

Ok, that explains why the $web variable doesn’t exist in debug-mode, and why the fog script doesn’t work then.

I understand this (linux) is a alien world to most windows folks. But you see there IS a lot of magic that goes into make FOG functional and universal.

You have the unfortunate situation of having very strange hardware (maybe one of a kind) that make imaging difficult to manage. FOG has a lot of instruments in the band, its takes a bit of cohering to get them to all play the same tune.

I do have some linux knowledge, and understanding some scripts would not cause too many problems. But it’s the (network)boot-process that I don’t know anything about. Like you say, trying to understand that, together with the fog scripts, and some weird hardware, makes the step too big. If I really want to learn how fog works, I’d better start with some normal hardware

[bmaster001]

@Sebastian-Roth said in another init.xz issue:

@bmaster001 said:

In that source you can see that the driver tries to get a MAC address from the EEPROM but if that fails, it generates a random one. I thought that it might help to know that it’s the driver who does this, and not some weird config option somewhere…

Great find! This is really unusual. Have never seen this before! Why would if not be able to read the MAC I wonder?!? Random MAC is kind of breaking the whole FOG logic of identifying hosts via MAC address.

Exactly. And I’m pretty sure there IS a mac address in the nic: when I enable uefi and let it network boot, I see always the same mac address. Would it be possible that it uses a different nic with uefi disabled?

[Sebastian Roth]

@bmaster001 said:

Would it be possible that it uses a different nic with uefi disabled?

Can’t imagine that being the case. Well on the other hand I’ve never seen a driver generating a random MAC for a real hardware NIC… So what do I know!

lol, just found this. Seems like the driver used to generate a new random MAC even on ifup/ifdown. Along that I found something interesting in the kernel code. See here (line 771):

/* maybe the boot loader passed the MAC address in devicetree */

Here you find a description of what that of_get_mac_address function does. I wasn’t able to find out if you can actually set this via iPXE or as a kernel parameter. Anyone an idea?

[bmaster001]

We’ve decided for now to just boot to Windows, and set the thing up so that we can test it “on the floor”. If it behaves like it should, we’re gonna buy some other ones to replace older devices currently in use. When we do that, I’ll have more time to play with capturing/deploying it so make our life easier So you guys have plenty of time to think about this weird piece of hardware, and I’ll get back to this thread when we have more devices to play with!

Thanks all for the help so far!!

[Sebastian Roth]

@bmaster001 said:

So you guys have plenty of time to think about this weird piece of hardware, and I’ll get back to this thread when we have more devices to play with!

I don’t think we are able to push this anywhere without having the hardware around or someone like you who are willing to test things out.