Cannot get DHCP to work to see if PXE will work on FOG v1.54/Ubuntu Server 18.04 LTS

[dbrilliant]

@Sebastian-Roth -I chose No for DHCP & DNS during the FOG install. Just doing the default install of FOG on both Ubuntu Server 18.04 & 16.04 w/o changing anything will not work at all.

[dbrilliant]

@Sebastian-Roth Also, one more question, since I told FOG no to DHCP, do I see your sample doesn’t have “authoritative;” not added to it, do I leave that part out, or uncommented?

[dbrilliant]

@Sebastian-Roth I tried copying your code to the bottom of the /etc/dhcp/dhcpd.conf file, and commented out all but what you had and left “authoritative;” enabled/uncommented and also changed the “next-server” to the FOG Server 192.168.2.1. DHCP no longer work, it’s failed at handing out IP addresses, and PXE doesn’t work. Any ideas?

[Sebastian Roth]

@dbrilliant Please post the full config you have at the moment. Otherwise we can’t tell you what’s wrong.

[dbrilliant]

@Sebastian-Roth

# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#
# Attention: If /etc/ltsp/dhcpd.conf exists, that will be used as
# configuration file instead of this file.
#

# option definitions common to all supported networks...
#option domain-name "example.org";
#option domain-name-servers ns1.example.org, ns2.example.org;

#default-lease-time 600;
#max-lease-time 7200;

# The ddns-updates-style parameter controls whether or not the server will
# attempt to do a DNS update when a lease is confirmed. We default to the
# behavior of the version 2 packages ('none', since DHCP v2 didn't
# have support for DDNS.)
#ddns-update-style none;

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
authoritative;

# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
#log-facility local7;

# No service will be given on this subnet, but declaring it helps the 
# DHCP server to understand the network topology.

#subnet 10.152.187.0 netmask 255.255.255.0 {
#}

# This is a very basic subnet declaration.

#subnet 192.168.2.0 netmask 255.255.255.0 {
#   range 192.168.2.5 192.168.2.15;
#   option routers 192.168.2.1;
 #}

# This declaration allows BOOTP clients to get dynamic addresses,
# which we don't really recommend.

#subnet 10.254.239.32 netmask 255.255.255.224 {
#  range dynamic-bootp 10.254.239.40 10.254.239.60;
#  option broadcast-address 10.254.239.31;
#  option routers rtr-239-32-1.example.org;
#}

# A slightly different configuration for an internal subnet.
#subnet 192.168.2.1 netmask 255.255.255.0 {
#  range 192.168.2.5 192.168.2.15;
#  option domain-name-servers ns1.internal.example.org;
#  option domain-name "internal.example.org";
#  option subnet-mask 255.255.255.0;
#  option broadcast-address 192.168.2.255;
#  default-lease-time 600;
#  max-lease-time 7200;
  GNU nano 2.9.3                               dhcpd.conf                                Modified  

#   option routers 192.168.2.1;
#}

# This declaration allows BOOTP clients to get dynamic addresses,
# which we don't really recommend.

#subnet 10.254.239.32 netmask 255.255.255.224 {
#  range dynamic-bootp 10.254.239.40 10.254.239.60;
#  option broadcast-address 10.254.239.31;
#  option routers rtr-239-32-1.example.org;
#}

# A slightly different configuration for an internal subnet.
#subnet 192.168.2.1 netmask 255.255.255.0 {
#  range 192.168.2.5 192.168.2.15;
#  option domain-name-servers ns1.internal.example.org;
#  option domain-name "internal.example.org";
#  option subnet-mask 255.255.255.0;
#  option broadcast-address 192.168.2.255;
#  default-lease-time 600;
#  max-lease-time 7200;
#}

# Hosts which require special configuration options can be listed in
# host statements.   If no address is specified, the address will be
# allocated dynamically (if possible), but the host-specific information
# will still come from the host declaration.

#host fogserver {
#  hardware ethernet 78:2b:cb:55:ee:0c;
#  filename "vmunix.passacaglia";
#  server-name "toccata.example.com";
#}

# Fixed IP addresses can also be specified for hosts.   These addresses
# should not also be listed as being available for dynamic assignment.
# Hosts for which fixed IP addresses have been specified can boot using
# BOOTP or DHCP.   Hosts for which no fixed address is specified can only
# be booted with DHCP, unless there is an address range on the subnet
# to which a BOOTP client is connected which has the dynamic-bootp flag
# to which a BOOTP client is connected which has the dynamic-bootp flag
# set.
host fogserver {
  hardware ethernet 78:2b:cb:55:ee:0c;
  fixed-address 192.168.2.1;
}

# You can declare a class of clients and then do address allocation
# based on that.   The example below shows a case where all clients
# in a certain class get addresses on the 10.17.224/24 subnet, and all
# other clients get addresses on the 10.0.29/24 subnet.

#class "foo" {
#  match if substring (option vendor-class-identifier, 0, 4) = "SUNW";
#}

#shared-network 224-29 {
#  subnet 10.17.224.0 netmask 255.255.255.0 {
#    option routers rtr-224.example.org;
#  }
#  subnet 10.0.29.0 netmask 255.255.255.0 {
    option routers rtr-29.example.org;
#  }
#  pool {
#    allow members of "foo";
#    range 10.17.224.10 10.17.224.250;
#  }
#  pool {
#    deny members of "foo";
#    range 10.0.29.10 10.0.29.230;
#  }
#}
# DHCP Server Configuration file\n#see /usr/share/doc/dhcp*/dhcpd.conf.sample
# This file was created by FOG
#Definition of PXE-specific options
# Code 1: Multicast IP Address of bootfile
# Code 2: UDP Port that client should monitor for MTFTP Responses
# Code 3: UDP Port that MTFTP servers are using to listen for MTFTP requests
# Code 4: Number of seconds a client must listen for activity before trying
#         to start a new MTFTP transfer
# Code 5: Number of seconds a client must listen before trying to restart
#         a MTFTP transfer
option space PXE;
option PXE.mtftp-ip code 1 = ip-address;
option PXE.mtftp-cport code 2 = unsigned integer 16;
option PXE.mtftp-sport code 3 = unsigned integer 16;
option PXE.mtftp-tmout code 4 = unsigned integer 8;
option PXE.mtftp-delay code 5 = unsigned integer 8;
option arch code 93 = unsigned integer 16;
use-host-decl-names on;
ddns-update-style interim;
ignore client-updates;
# Specify subnet of ether device you do NOT want service.
# For systems with two or more ethernet devices.
# subnet 136.165.0.0 netmask 255.255.0.0 {}
subnet 192.168.2.0 netmask 255.255.255.0{
    option subnet-mask 255.255.255.0;
    range dynamic-bootp 192.168.2.10 192.168.2.254;
    default-lease-time 21600;
    max-lease-time 43200;
    option routers 192.168.2.1;
   option domain-name-servers 192.168.1.1;
    next-server 192.168.2.1;
    class "Legacy" {
        match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00000";
        filename "undionly.kkpxe";
    }
    class "UEFI-32-2" {
        match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00002";
        filename "i386-efi/ipxe.efi";
    }
    class "UEFI-32-1" {
        match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00006";
        filename "i386-efi/ipxe.efi";
    }
    class "UEFI-64-1" {
        match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00007";
        filename "ipxe.efi";
    }
    class "UEFI-64-2" {
        match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00008";
        filename "ipxe.efi";
    }
    class "UEFI-64-3" {
        match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00009";
        filename "ipxe.efi";
    }
    class "SURFACE-PRO-4" {
        match if substring(option vendor-class-identifier, 0, 32) = "PXEClient:Arch:00007:UNDI:003$
        filename "ipxe.efi";
    }
    class "Apple-Intel-Netboot" {
        match if substring(option vendor-class-identifier, 0, 14) = "AAPLBSDPC/i386";
        option dhcp-parameter-request-list 1,3,17,43,60;
        if (option dhcp-message-type = 8) {
            option vendor-class-identifier "AAPLBSDPC";
            if (substring(option vendor-encapsulated-options, 0, 3) = 01:01:01) {
                # BSDP List
                option vendor-encapsulated-options 01:01:01:04:02:80:00:07:04:81:00:05:2a:09:0D:81$
                filename "ipxe.efi";
            }
        }
    }
}

[dbrilliant]

this reply is missing a lot of"#" symbols, where I commented lines out.

[Sebastian Roth]

@dbrilliant First off, you can use the buttons above the input text box to format configs as code blocks (symbol </>). This way the # are and other texts are shown as is.

I have not tested the config myself but there are three things that jump at me.

• In the first third of the config there is a line not commented but that might be just a copy & paste thing from the nano editor you use. Possibly this is not in your text file but please check to make sure:

...
#  default-lease-time 600;
#  max-lease-time 7200;
  GNU nano 2.9.3                               dhcpd.conf                                Modified  

#   option routers 192.168.2.1;
#}
...

• Second you have an uncommented block for your FOG server host. This is ok in general although I myself prefer to configure servers with a static address in the server’s network config. This way you don’t have to use the fixed address section here. Quick note: I am not exactly sure if you can have a host declaration outside of any class or group defintion. From reading the man page quickly I think it is possible but I am not exactly sure and have not tested it yet.

host fogserver {
  hardware ethernet 78:2b:cb:55:ee:0c;
  fixed-address 192.168.2.1;
}

• Third there seems to be another uncommented piece about half way down the config file. Although option routers ... should be possible to use in a global scope I am not exactly sure. Possibly this is causing the error:

#  }
#  subnet 10.0.29.0 netmask 255.255.255.0 {
    option routers rtr-29.example.org;
#  }
#  pool {

If you still can’t start dhcp server run systemctl status isc-dhcp-server and journalctl -l -u isc-dhcp-server to figure out what is wrong in the config file.

[dbrilliant]

It still won’t start, and the “journal” command doesn’t tell me exactly what the problem lies, but states that it errors with 0 and gives no leases. DHCP status gives configuration error,
topic 1- was from the copy & paste and are no part of the dump.
topic 2: I commented the host fogserver and fixed-address out just in case as well as the bracket on the line below.
topic3: subnet 10.0.29.0… all these are commented out, as I just quintuple checked.

Since none of these are working, I’m leaning a complete format of Ubuntu 18.04 LTS with all universal repositories, NO DHCP download, and statically assign 192.168.2.1/24 as my eno1 (ethernet) adapter IP, and install updates ubuntu-desktop, and any basic updates, then install FOG. In FOG yes for DHCP on eno1 w/ no DNS, and let it do the rest and see if I can get lucky. The first runs w/ FOG on 16.04 & 18.04 failed miserably. Hopefully, I won’t need to edit files.

[Sebastian Roth]

@dbrilliant For Ubuntu 18.04 you ought to use FOG working branch as I have fixed a couple of things there - either use git or if you don’t know how to handle that you can find a ZIP for download.

It still won’t start, and the “journal” command doesn’t tell me exactly what the problem lies, but states that it errors with 0 and gives no leases.

You might need to scroll down in that view (arrow/page down) to see the very latest messages. Do a systemctl restart isc-dhcp-server before so you have the latest error messages in the output.

DHCP status gives configuration error,

Please post the full output or a picture of it here and we might be able to help.

[dbrilliant]

I rebuilt 18.04 from scratch, and got way farther. updated both 32 bit & 64 bit kernels in FOG. The fog install I allowed it to dictate DHCP, and I can register hosts. I have a Dell 790 Windows 7 64 bit image I’m testing now. Seems to be hung up on the image upload for the 790, where it says “Saving original disk/parts” for about 5-7 minutes, and finally progressed. I will test Windows 10 afterwards.

Thanks for your help.

[dbrilliant]

@dbrilliant -It’s all good. Working fantastic!