[syslinux] PXE: Booting Diskless Node
Trilok Kumar
trilokumar at yahoo.co.uk
Thu Jul 17 04:58:50 PDT 2003
Hi,
I have refered to ur documents for creating a Diskless
node in linux ,but could not get through the
installation .
The exact problem that i am facing is mention below ,
also, there r few queries, which i would be greatfull
if u can answer
First let me explain u what i have done .
I am trying the configuration with one server machine
and one client.
server configuration
256mb ram
AMD Athlon XP
Processor speed 1.5 GHz
OS -Red Hat Linux
DHCP 3.0
tftp-server-0.32
Clients configuration
128mb ram
intel motherboard 810i
Processor speed 1.5 GHz
ethernet D-Link DFE 538TX Fast Ethernet
so my dhcpd.conf file looks like this
***************dhcpd.conf**********************
# Sample configuration file for ISCD dhcpd
#
# Make changes to this file and copy it to
/etc/dhcpd.conf
#
ddns-update-style none;
allow booting;
allow bootp;
default-lease-time 21600;
max-lease-time 21600;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.0.255;
option routers 192.168.0.254
,192.168.0.1;
#option domain-name-servers 192.168.0.254
,192.168.0.1;
option domain-name "mail.trilok";
#option root-path
"/tftpboot/192.168.0.14";
shared-network STATIONS {
subnet 192.168.0.0 netmask 255.255.255.0 {
}
}
#00:80:48:9c:4a:4b
group {
next-server 192.168.0.254;
use-host-decl-names on;
option log-servers 192.168.0.254;
filename "pxelinux.0";
host host1 {
#filename "pxelinux.0"; #Remote
BootLoader for Linux
hardware ethernet 00:05:5d:42:4d:d4;
fixed-address 192.168.0.14;
} #end of host
} #end of group
*******************************************************
The default file in /tftpboot/192.168.0.14 Directory
look like this
*******************default*********************
DEFAULT l
#serial 0,38400n80
LABEL l
KERNEL bzImage
APPEND initrd=rootfs.gz root=/dev/ram0 rw ip=dhcp
#nfsroot=192.168.0.254:/tftpboot/192.168.0.14
panic=10
ip dhcp
prompt 1
timeout 100
ipappend 1
*******************************************************
I feel the problem is with this file.
The rootfs.gz is the 128mb file system i have
created.I have tried using remote mounting nfs but it
did not work for nfs the
APPEND parameter was given was
root=/dev/nfsd
nfaddrs=192.168.0.14:192.168.0.254:192.168.0.254:prompt:eth0
nfsroot=192.168.0.254:/tftpboot/192.168.0.14
Ok fine......now when i boot after restarting the
deamon xinetd,nfs,portmap,dhcpd and taif -f
/var/log/messages i get the following error:
server side
tftp:client does not accept the options
client side
Net4:Linux TCP/IP 1.0 for NET4.0
IP Protocols : ICMP,UDF,TCP,IGMP
IP:routing cache hash table of 512 bucket,4kbytes
TCP:Hash tables configuration(establish 8192 bind
8192)
IP-config:No network device available
NET4:Linux domain socket 1.0/smp for linux NET 4.0
ds:no socket drivers loaded!
RAMDISK:Compressed image found at block 0
Freeing initrd memory:57370k freed
VFS:mounted root (ext2 filesystem)
Freeing unused kernel memory 148k freed
attemp to access beyond end of the device
01:00:rw=0,want=73771,limit=64096
EXT2-fs error(device ramdisk(1,0):ext2 _read_inode :
unable to read the node block-inode=18303 block=73770
kernel panic:No init found Trying passing init= option
to the kernel
The machine that i am using as a server is our mail
server ,sendmail is runing on it.The client hardware
supports linux.There was a firewall rule on the server
which i have removed it.
Any other detail which i have missed out u can please
let me know.
In this sample configuration below which i have taken
fron ur web page
1)what is code 1,code 2,code 3 ? the ip-address has to
given of tftp server,because i have tried giving ip
address dhcp showed error.
2)how do i get option vendor-class-identifier
PXEClient" vendor-option-space PXE and option
vendor-class-identifier?
******************Sample***************************
# DHCP configuration file for DHCP ISC 3.0
ddns-update-style none;
# Definition of PXE-specific options
# Code 1: Multicast IP address of boot file server
# 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 PXE.discovery-control code 6 = unsigned
integer 8;
option PXE.discovery-mcast-addr code 7 = ip-address;
subnet 192.168.1.0 netmask 255.255.255.0 {
class "pxeclients" {
match if substring (option
vendor-class-identifier, 0, 9) = "PXEClient";
option vendor-class-identifier "PXEClient";
vendor-option-space PXE;
# At least one of the vendor-specific PXE options
must be set in
# order for the client boot ROMs to realize that
we are a PXE-compliant
# server. We set the MCAST IP address to 0.0.0.0
to tell the boot ROM
# that we can't provide multicast TFTP (address
0.0.0.0 means no
# address).
option PXE.mtftp-ip 0.0.0.0;
# This is the name of the file the boot ROMs
should download.
filename "pxelinux.0";
# This is the name of the server they should get
it from.
next-server 192.168.1.1;
}
pool {
max-lease-time 86400;
default-lease-time 86400;
range 192.168.1.2 192.168.1.254;
deny unknown clients;
}
host node1 {
hardware ethernet fe:ed:fa:ce:de:ad;
fixed-address 192.168.1.2;
}
host node2 {
hardware ethernet be:ef:fe:ed:fa:ce;
fixed-address 192.168.1.3;
}
********************************************************
Regards
Ttrilok
________________________________________________________________________
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