ipxe/boot.php hanging on capture

[Tom Elliott]

For the restart issue this is probably because the init is failing to get DHCP, as if this failed we can’t do anything with the system anyway. What happens if you place a dummy switch between the system and the main switch?

[ftgjason]

@Tom-Elliott I will try to use a different switch, but I currently have the switch in my office directly connected to the machine I am trying to upload and the FOG server. My DHCP box is in another building.

[Tom Elliott]

@ftgjason is it a dumb switch or managed?

[ftgjason]

@Tom-Elliott managed

[Tom Elliott]

@ftgjason and that managed switch is setup for spanning tree? If so is port fast, or rapid STP also enabled?

[ftgjason]

@Tom-Elliott no clue

[ftgjason]

@ftgjason is this something that has changed from the earlier versions? The switches all worked perfectly before the svn up

[Tom Elliott]

@ftgjason there’s been one change to the inits which was to help with xp and vista older style images and one change to the kernels to add support for the bnx2 firmware on some server boxes. No changes have been made to the inits in regards to network load up.

[ftgjason]

@Tom-Elliott so my switches are set to RSTP by default. Is there something else I should be seeing?

[ftgjason]

@ftgjason I added a dumb switch which is connected to the fog client machine that I wish to upload/capture. Nothing is different with the addition of the dumb switch.

[Tom Elliott]

Can you get a screen shot or video of the issue?

[ftgjason]

@Tom-Elliott

[Tom Elliott]

@ftgjason what’s in the Apache error logs?

[ftgjason]

This post is deleted!

[ftgjason]

@Tom-Elliott here is the latest couple of entries…

[Mon Sep 19 15:46:48.827081 2016] [:error] [pid 2156] [client 192.168.0.66:8904]                                                                              PHP Fatal error:  Uncaught exception 'Exception' with message 'Type: 8, File: /                                                                             var/www/html/fog/lib/fog/fogbase.class.php, Line: 791, Message: Undefined index:                                                                              value, Host: 192.168.20.49, Username: fog' in /var/www/html/fog/lib/fog/fogftp.                                                                             class.php:74\nStack trace:\n#0 /var/www/html/fog/lib/fog/storagenode.class.php(1                                                                             13): FOGFTP->connect()\n#1 /var/www/html/fog/lib/fog/fogcontroller.class.php(831                                                                             ): StorageNode->loadImages()\n#2 /var/www/html/fog/lib/fog/fogcontroller.class.p                                                                             hp(212): FOGController->loadItem('images')\n#3 /var/www/html/fog/lib/fog/storage                                                                             node.class.php(45): FOGController->get('images')\n#4 /var/www/html/fog/lib/fog/s                                                                             toragegroup.class.php(73): StorageNode->get('images')\n#5 [internal function]: S                                                                             torageGroup->{closure}(Object(StorageNode), 1)\n#6 /var/www/html/fog/lib/fog/sto                                                                             ragegroup.class.php(87): array_walk(Array, Object(Closure))\n#7 /var/www/html/fo                                                                             g/lib/fog/bootmenu.class.php(1381): StorageGroup->getOptimalStorageNode('8')\n#8                                                                              /var/www/html/fog/lib/fog/bootmenu.class.php(424): BootMenu->getTasking()\n#9 [                                                                             internal funct in /var/www/html/fog/lib/fog/fogftp.class.php on line 74
[Tue Sep 20 09:06:32.035780 2016] [:error] [pid 2113] [client 192.168.0.64:3636]                                                                              PHP Fatal error:  Uncaught exception 'Exception' with message 'Type: 8, File: /                                                                             var/www/html/fog/lib/fog/fogbase.class.php, Line: 791, Message: Undefined index:                                                                              value, Host: 192.168.20.49, Username: fog' in /var/www/html/fog/lib/fog/fogftp.                                                                             class.php:74\nStack trace:\n#0 /var/www/html/fog/lib/fog/storagenode.class.php(1                                                                             13): FOGFTP->connect()\n#1 /var/www/html/fog/lib/fog/fogcontroller.class.php(831                                                                             ): StorageNode->loadImages()\n#2 /var/www/html/fog/lib/fog/fogcontroller.class.p                                                                             hp(212): FOGController->loadItem('images')\n#3 /var/www/html/fog/lib/fog/storage                                                                             node.class.php(45): FOGController->get('images')\n#4 /var/www/html/fog/lib/fog/s                                                                             toragegroup.class.php(73): StorageNode->get('images')\n#5 [internal function]: S                                                                             torageGroup->{closure}(Object(StorageNode), 1)\n#6 /var/www/html/fog/lib/fog/sto                                                                             ragegroup.class.php(87): array_walk(Array, Object(Closure))\n#7 /var/www/html/fo                                                                             g/lib/fog/bootmenu.class.php(1381): StorageGroup->getOptimalStorageNode('8')\n#8                                                                              /var/www/html/fog/lib/fog/bootmenu.class.php(424): BootMenu->getTasking()\n#9 [                                                                             internal funct in /var/www/html/fog/lib/fog/fogftp.class.php on line 74
[Tue Sep 20 09:26:50.788079 2016] [:error] [pid 2152] [client 192.168.0.64:43304                                                                             ] PHP Fatal error:  Uncaught exception 'Exception' with message 'Type: 8, File:                                                                              /var/www/html/fog/lib/fog/fogbase.class.php, Line: 791, Message: Undefined index                                                                             : value, Host: 192.168.20.49, Username: fog' in /var/www/html/fog/lib/fog/fogftp                                                                             .class.php:74\nStack trace:\n#0 /var/www/html/fog/lib/fog/storagenode.class.php(                                                                             113): FOGFTP->connect()\n#1 /var/www/html/fog/lib/fog/fogcontroller.class.php(83                                                                             1): StorageNode->loadImages()\n#2 /var/www/html/fog/lib/fog/fogcontroller.class.                                                                             php(212): FOGController->loadItem('images')\n#3 /var/www/html/fog/lib/fog/storag                                                                             enode.class.php(45): FOGController->get('images')\n#4 /var/www/html/fog/lib/fog/                                                                             storagegroup.class.php(73): StorageNode->get('images')\n#5 [internal function]:                                                                              StorageGroup->{closure}(Object(StorageNode), 1)\n#6 /var/www/html/fog/lib/fog/st                                                                             oragegroup.class.php(87): array_walk(Array, Object(Closure))\n#7 /var/www/html/f                                                                             og/lib/fog/bootmenu.class.php(1381): StorageGroup->getOptimalStorageNode('8')\n#                                                                             8 /var/www/html/fog/lib/fog/bootmenu.class.php(424): BootMenu->getTasking()\n#9                                                                              [internal funct in /var/www/html/fog/lib/fog/fogftp.class.php on line 74
[root@localhost ~]#

Mod edited to use code box.

[Wayne Workman]

@ftgjason on the fog server at CLI, what is the output of these two commands?
ip addr show
and
cat /tftpboot/default.ipxe

[ftgjason]

@Wayne-Workman

[root@localhost ~]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 18:03:73:df:0d:93 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.49/23 brd 192.168.1.255 scope global eno1
       valid_lft forever preferred_lft forever
    inet6 fe80::1a03:73ff:fedf:d93/64 scope link
       valid_lft forever preferred_lft forever
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# cat /tftpboot/default.ipxe
#!ipxe
cpuid --ext 29 && set arch x86_64 || set arch i386
params
param mac0 ${net0/mac}
param arch ${arch}
param platform ${platform}
param product ${product}
param manufacturer ${product}
param ipxever ${version}
param filename ${filename}
isset ${net1/mac} && param mac1 ${net1/mac} || goto bootme
isset ${net2/mac} && param mac2 ${net2/mac} || goto bootme
:bootme
chain http://192.168.0.49/fog/service/ipxe/boot.php##params
[root@localhost ~]#

[Wayne Workman]

This could be another issue with IPv6 and Apache. Try disabling IPv6 completely. If you can tell me what OS & version your fog server is running, I can get you some specific instructions to try.

[ftgjason]

@Wayne-Workman Fedora 22 with FOG Running Version 1.3.0-RC-10
SVN Revision: 5955

that is the latest SVN correct?

[Wayne Workman]

@ftgjason I don’t know if that’s the latest version, I’ve been a little under the weather lately.

I found this reference, looks professional and is detailed:
https://www.g-loaded.eu/2008/05/12/how-to-disable-ipv6-in-fedora-and-centos/

Copy/pasting it so that it’s here still in case the link/site disappears in the future:

---

They say that by disabling IPv6 things get a bit smoother and faster regarding networking. I don’t really know if this is true, but I guess, if you’ve decided to disable this feature, you probably care to do it the Right Way. As far as I know, trying to disable IPv6 through anaconda during the installation of Fedora or CentOS does not turn off the IPv6 functionality completely, but it just disables it for the configured network interface. This is not actually a problem, but, why should this network layer be enabled system-wide, if you do not use it at all? This small article assists you in disabling IPv6 in the latest Fedora and CentOS releases in an aggressive and unforgiving way.
Check if the module is loaded

IPv6 functionality is being made available to the system by the ipv6 kernel module. To check if this module is currently loaded in your system, issue the following command as root:

lsmod | grep ipv6

If you see ipv6 in its output, then the module is loaded.

Performing this check is absolutely not necessary. It is included in this article for completeness.
Disable IPv6

You can prevent a module from being inserted into the kernel by either blacklisting it or by completely disabling it.

In this case, since you will most probably turn off the IPv6 firewall (ip6tables) as well, it is highly recommended to completely disable the ipv6 module, to avoid any accidental loading of the IPv6 stack without any firewall protection at the same time.
How the module blacklist works

This information about blacklisting a kernel module exists here for educational purposes. It has been mentioned above that for ipv6 it is important to completely disable it.

From the modprobe.conf man page:

Modules can contain their own aliases: usually these are aliases describing the devices they support, such as “pci:123…”. These “internal” aliases can be overridden by normal “alias” keywords, but there are cases where two or more modules both support the same devices, or a module invalidly claims to support a device: the blacklist keyword indicates that all of that particular module’s internal aliases are to be ignored. 

So, blacklist indicates that a module’s aliases should be ignored. But, what happens if an application requires to load that specific module or if root uses modprobe to load it on demand? Let’s test it…

To blacklist the module, simply save the following line in a file inside /etc/modprobe.d:

blacklist ipv6

Next, disable any services that use IPv6, eg ip6tables or any IPv6-enabled network interfaces and reboot (mandatory).

After you’ve logged-in again, try, for example, to load the ipv6 module with the modprobe command (as root):

[root@centos]# modprobe -v ipv6
insmod /lib/modules/2.6.18-53.1.14.el5/kernel/net/ipv6/ipv6.ko
[root@centos]# lsmod | grep v6
ipv6                  251393  8

The blacklisted module has been loaded. This is what happens if it is needed by a system service, regardless of the fact that it has been blacklisted. In the case of ipv6 this could be a security risk, provided that the ipv6 firewall has been turned off but some network interfaces still use IPv6. So, frankly, it is suggested to read on how to disable the module more aggressively…
Completely disable the ipv6 module

To completely disable IPv6 in your system, all you have to do is save the following line in a file inside /etc/modprobe.d/.

install ipv6 /bin/true

The above line means: whenever the system needs to load the ipv6 kernel module, it is forced to execute the command true instead of actually loading the module. Since /bin/true, does absolutely nothing, the module never gets loaded.

Again, it is required to reboot for the changes to take effect.

It is obvious that this is an aggressive method to disable kernel modules, but it guarantees that the module never gets loaded.

This is the recommended way to disable IPv6.
Other Configuration Tasks

Since the IPv6 functionality has been disabled, you can disable the ip6tables service (IPv6 Firewall). Issue the following command as root:

chkconfig ip6tables off

It is also a good idea, since the ip6tables service has been turned off, to disable any IPv6-related functionality in the network interface configuration. Even if you do not do this, the IPv6 stack will not be initialized because the ipv6 module cannot be loaded. But, generally, you could set the following options to “no” inside your network interface scripts, for example: /etc/sysconfig/network-scripts/ifcfg-eth0

IPV6INIT=no
IPV6_AUTOCONF=no

Finally, In fedora 8 or newer you can safely remove the following option from the /etc/sysconfig/network file, if it exists:

NETWORKING_IPV6=no

Final Thoughts

Using the instructions above, you can completely disable IPv6 in your system. On the other hand, you should understand that IPv6 is not an evil thing… It exists in order to address certain issues. If you ever think about actually trying to configure and use it instead of just disabling it every time you install your Linux operating system, here is a good place to start…

How to Disable IPv6 in Fedora and CentOS by George Notaras is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Permissions beyond the scope of this license may be available at Licensing Information.
Copyright 2008 - Some Rights Reserved