Current status: Not fisnished yet. We suceeded to start run level 5 with fixed IP address 192.168.1.30

Current problem: The client can not connect to 172.17.4.0 network.

Current known problem: We do not know how to set the Gateway.

http://docs.fedoraproject.org/install-guide/f10/

We want to make a diskless computing system so that we need a PXE Server. PXE stands for "Pre-boot eXecution Environment". PXE is a special extension of services provided by the Dynamic Host Configuration Protocol (DHCP). It uses a Trivial File Transfer Protocol (TFTP) server to provide minimal boot to a network client. Let's try to configure it!

Set a small subnet for testing PXE

What we need

Checking

Network setting

SSH check

Setting for the original Linux machine from which we copy the system

172.17.4.178:# yum install busybox-anaconda

Setting for the PXE server machine

SElinux shoule be permissive mode.

Install DHCP and TFTP Server etc

TFTP Configuration

# default: off
# description: The tftp server serves files using the trivial file transfer \
#       protocol.  The tftp protocol is often used to boot diskless \
#       workstations, download configuration files to network-aware printers, \
#       and to start the installation process for some operating systems.
service tftp
{
       disable                 = no
       socket_type             = dgram
       protocol                = udp
       wait                    = yes
       user                    = root
       server                  = /usr/sbin/in.tftpd
       server_args             = -s /tftpboot
       per_source              = 11
       cps                     = 100 2
       flags                   = IPv4
}
# service xinetd restart

Copy system data for booting

# mkdir /nfsboot
# rsync -v -a 
--exclude='/proc/*' --exclude='/sys/*' --exclude='/dev/*'\
--exclude='/media/*'   --exclude='/tmp/*' --exclude='/misc/*'\
/ nfsboot
# rsync -v -a -e ssh \
--exclude='/proc/*' --exclude='/sys/*' --exclude='/dev/*'\
--exclude='/media/*'   --exclude='/tmp/*' --exclude='/misc/*'\
172.17.4.178:/ /nfsboot

DHCP Configuration

# /sbin/service dhcpd restart
# chkconfig dhcpd on
(the last line is for activating dhcp on booting process)

NFS configuration

# Port rpc.mountd should listen on.
  1. MOUNTD_PORT=892

http://d.hatena.ne.jp/setq/20090312/1236853536

[root@rsaito-necPC rsaito]# cat /etc/exports

PXE server configuration

#system-config-netboot
Name fedora_10_32bit
Explanation fedora_10_32bit
server 192.168.1.10
directory /nfsboot
IP address/subnet 255.255.255.0  <- we use subnet information
operating system fedora_10_32bit
Other part should be as it is.
# cd /tftpboot/linux-install/pxelinux.cfg
# mv default default.org
# ln -s FFFFFF00 01-00-21-70-c9-eb-60
[root@rsaito-necPC pxelinux.cfg]# cat 01-00-21-70-c9-eb-60

label fedora_10_32bit
   kernel fedora_10_32bit/vmlinuz
   append  initrd=fedora_10_32bit/initrd.img root=/dev/ram0 init=disklessrc
 NFSROOT=192.168.1.10:/nfsboot ramdisk_size=24753 ETHERNET=eth0  
 SNAPSHOT=255.255.255.0

Set /nfsboot/root/etc

[root@rsaito-necPC sysconfig]# cat network
NETWORKING=yes
HOSTNAME=pxe-fefoda10-dell
[root@rsaito-necPC network-scripts]# cat ifcfg-eth0
# Broadcom Corporation NetXtreme BCM5705_2 Gigabit Ethernet
TYPE=Ethernet
DEVICE=eth0
HWADDR=00:21:70:c9:eb:60  <---- set PXE client Mac address
BOOTPROTO=none            <---- change dhcp to none
NETMASK=255.255.255.0     <---- set subnet mask
IPADDR=192.168.1.30       <---- set fixed IP address
GATEWAY=192.168.1.10      <---- now PXE server is gateway 172.17.4.0
ONBOOT=yes
USERCTL=yes
PEERDNS=yes
USERCTL=no
PEERDNS=yes
IPV6INIT=no
NM_CONTROLLED=no

Set PXE client


Problems and Solutions

P: init is not found. /disklessrc is not found.

S: use system-config-netboot

S: init should be in /tftpboot/linux-install/32bit_fedora_10/initrd.omg

S: the name of "32bit_fedora_10" is specified by system-config-netboot.

P: I can find initrd.img but not init itself.

S: If you can expand initrd.img as above, you will find init.

S: disklessrc is not generated by system-config-netboot

P: nfs is not mountd

S: setting fire wall is important as above.

S: you can check the mount the /nfsboot from the other Linux machine.

P: dhcpd does not work

S: dhcpd is not running. /etc/rc5.d/S65dpcpd restart.

S: after dhcpd restarts, /etc/rc5.d/S56xined restart.

S: check dhcp function by Windows machine.

P: /etc/resolve.conf is not correct.

S: resolve.conf is generated the host computor which is copied by rsync.

P: some file can not be downloaded by Selinux

S: stop SeLinux for a moment and check it again.

S: we should change the file type. checked by ls -Z.

P: How to know the contents initrd.img which is generated by system-config-netboot?

S: The solution is given by using cpio command

P: X window is not running and the OS can not be used.

S: edit /nfsboot/root/etc/inittab then change ranlevel to 1,

P: X window should be adjusted to new computor

S: The following seems to work.

  1. Run X -configure which makes /root/xorg.conf.new
  2. cp /root/xorg.conf.new /etc/X11/xorg.conf
  3. xorgcfg  -texmode
  4. startx
  5  if it does not work, edit /etc/X11/xorg.conf (Change driver from ati to vesa?
  6. startx again 

Directrories and files

PXE server

/tftpboot

/nfsboot

PXE client

When we try to find "disklessrc fedora", we found the following Web site.

http://d.hatena.ne.jp/adsaria/20080131/1201792574 http://wikiwiki.jp/disklessfun/?FrontPage


The following is the statements which are evetually not used.

Edit initrd.img for NFS mount

http://www.atmarkit.co.jp/flinux/rensai/linuxtips/a021pxediskless.html

http://www.devdrv.co.jp/linux/cpio-initrd-format.htm

http://blogs.yahoo.co.jp/natto_heaven/11513467.html

# cp /tftpboot/linux-install/f9-diskless/initrd.img /tmp
# cd /tmp
# mkdir initrd.test
# cd initrd.test
# cp ../initrd.img .
# mkdir initrd
# cd initrd
# zcat ../initrd.img | cpio -i -c
# cd /sbin
# cp /sbin/mount.nfs .
# cp /sbin/umount.nfs .
# cp /sbin/mount.nfs4 .
# cp /sbin/umount.nfs4 .
# cd ..
# find . | cpio --quiet -c -o | gzip -c > ../initrd-new.img
# cd /tftpboot/linux-install/F9-diskless/
# mv initrd.img initrd.img.org
# cp /tmp/initrd-test/initrd-new.img ./initrd.img

PXE server configuration (old)

[root@rsaito-necPC rc5.d]# cd /tftpboot/f9/snapshot/
[root@rsaito-necPC snapshot]# ls -l
total 12
drwxrwxr-x 8 root root 4096 2009-05-09 08:57 255
-rw-r--r-- 1 root root 1070 2008-08-26 19:09 files
-rw-r--r-- 1 root root    7 2009-05-09 08:52 files.custom
[root@rsaito-necPC snapshot]# cat files.custom
/home/

If Selinux complains something, chcon command can be used.

# cd /tftpboot
# chcon -R -t type .
# ls -Z .

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