Cant PXE Boot = PXE-T01: File not Found

[Wayne Workman]

Figured it out. In Debian 9, you have to put the interface name into this file:
/etc/default/isc-dhcp-server

When I looked at mine, it looked like this:

INTERFACESv4=""
INTERFACESv6=""

So I changed it to read like this:

INTERFACESv4="ens3"
INTERFACESv6=""

Then I had to remove the pid file:
rm -f /var/run/dhcpd.pid

Then, I could finally start the dhcp service:
systemctl start isc-dhcp-server

[404]

@wayne-workman ok perfect, thanks for your fast reaction. I will give it a try…
So this way it should only start the DHCPv4 and ignore the v6 stuff, right?

I will try to install the isc-dhcp-server first and set this up. Then i will run the installfog.sh an see what happens

Thanks

[Wayne Workman]

@404 Well, what I’d suggest for now is to run the fog installer as normal. After it fails, go edit that one file, delete the pid file, then re-run the installer again. It should succeed the second time. FOG has to carefully configure the dhcp server so that multiple architectures are supported. We’re going to write a patch here shortly to fix this in working branch.

[Sebastian Roth]

@wayne-workman Thanks heaps for looking into this! Reading through a couple of old posts on the internet I kind of came to the same conclusion that it’s an issue with a missing/wrong /etc/default/isc-dhcp-server parameter.

Hmmmm, I am wondering how we are going to fix this. Why is it working in debian 8? I’d actually expect debian (dpkg) to generate /etc/default/isc-dhcp-server properly!

[Wayne Workman]

@sebastian-roth said in Cant PXE Boot = PXE-T01: File not Found:

Hmmmm, I am wondering how we are going to fix this.

Maybe a sed command that uses a variable. This would only match if it’s empty:

interface="ens3"
sed -i "s/INTERFACESv4=\"\"/INTERFACESv4=\"$interface\"/g" /etc/default/isc-dhcp-server

[Sebastian Roth]

@Wayne-Workman Yeah sure we can just force it. But I am wondering why this is the case. Searching more I found this: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=815319

So the issue has been around for a fair bit of time. But I still haven’t figured out if this is just an issue with the debian specific start scripts or if it’s actually a newer isc-dhcp-server version doing the env variable check… then fails if it’s not set - very poor I find.

[Sebastian Roth]

Interesting… the bug report just posted ends with stating that this is fixed in version 4.3.5-1. In the logs posted I see version 4.3.5-3 being installed. Possibly a regression?

Edit: Here we go I think: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=862680

Although I really like debian I am still not sure if this is something we should fix. Maybe we do and next time debian is doing something different again…?!

[Wayne Workman]

This is a pretty simple fix, so I don’t see why not. If the debian team fixes it later, great. When they fix it, the sed command will stop matching. just my opinion. I think we should make the installer work on the mainstream distributions - even with their problems to an extent.

[Sebastian Roth]

Seems like the newer isc-dhcp-server version does start as IPv4 and IPv6 DHCP server if no interface is given in /etc/defaults/isc-dhcp-server. As we don’t have any IPv6 definition in our config it fails to start. One way to fix this would be to add IPv6 defintion but as I don’t think this will be of much use to any of our FOG users I’d better follow Wayne’s idea on fixing /etc/defaults/isc-dhcp-server.

Fix is pushed in working branch. So here is another reason to push for the next release.

[Wayne Workman]

@sebastian-roth said in Cant PXE Boot = PXE-T01: File not Found:

So here is another reason to push for the next release.

I think we are ready for another RC.