This chapter describes the configuration steps necessary for
the server machine to hand-off your JavaStation
boot image.
It is now time to setup your server to deliver the OS
and filesystem to the JavaStation.
In our examples here, we configure a Linux/SPARC server "lnxserv
" at private IP 192.168.128.100 to deliver a boot image to
JavaStation "java01" at
private IP 192.168.128.1. Both are on private network 192.168.128/24.
When using an "NFS-Root" Filesystem, the location on
the server of the filesystem in our sample is at "/path/to/nfsroot
".
We first need to set up RARP service on our server,
so the JavaStation can auto-configure its
IP.
First, populate the "/etc/ethers" file with the mapping of
the mac address of the JavaStation to its
hostname:
### /etc/ethers
8:0:20:82:7a:21 lnxserv # 192.168.128.100 (server is not necessary,)
# # (just for completeness)
#
#
08:00:20:81:C2:ae java01 # 192.168.128.1 (JavaStation)
#
###
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Next, populate the "/etc/hosts" file with the IP
to hostname maps:
### /etc/hosts
192.168.128.100 lnxserv
192.168.128.1 java01
###
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Lastly, configure the RARP cache to fill.
On 2.2.x based systems, you do this with the /sbin/rarp command, so
fill the cache at startup:
### Part of rc.local
#
# If necessary, first load the rarp module to be able to fill the cache.
# /sbin/insmod rarp
#
# Now we fill the rarp cache. You better have the rarp command available.
if [ -f /sbin/rarp ]; then
/sbin/rarp -f
fi
###
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On 2.4.x based systems, you must use the userland RARP daemon to answer
RARP requests instead.
You now need to configure your server to deliver DHCP
service. This will help identify the JavaStation,
the network it is on, and where to get its boot image from.
The following is a sample "dhcpd.conf" file for the
ISC DHCP server software which ships
with most Linux/SPARC distributions.
### Sample /etc/dhcpd.conf file for ISC DHCPD
#
deny unknown-clients;
#
subnet 192.168.128.0 netmask 255.255.255.0
{
range 192.168.128.1 192.168.128.150;
}
group
{
host java01
{
hardware ethernet 08:00:20:81:C2:ae;
filename "C0A88003"; # "/tftpboot/xxx"
fixed-address java01; # 192.168.128.1
}
}
#
### End dhcpd.conf file
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A longer
dhcpd.conf from the ZLS is mirrored here for demonstration purposes.
Note: Some early versions of ISC DHCPD are
reported to not work well. It is recommended you use ISC
DHCPD Version 2.0 and above. If you still find youself
having problems, there is a patch to the ISC DHCP server on the ZLS website.
When you are serving up an "NFS-Root" filesystem, you need
to share the filesystem you created to the JavaStation
client. You do this with the "/etc/exports"
file.
###/etc/exports
/path/to/nfsroot java01(rw,no_root_squash)
###
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Be sure your NFS server gets properly started
up at boot-time.
Now we need to set up the last step on our server: the TFTP
configuration. For this step, you will need the kernel
you created (using the "NFS-Root" option) or the
piggybacked kernel/fs boot image (using the "Embedded-Root"
option), the appropriate PROLL, and some
knowledge of hexadecimal numbering.
The first thing you need to do is verify that "TFTPd" is
enabled in your "/etc/inetd.conf" file:
tftp dgram udp wait root /usr/sbin/tcpd in.tftpd
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Now, you move your copy of proll for your JavaStation
architecture, along your kernel or piggybacked kernel
image to /tftpboot.
Now, you create of symbolic link from the hexidecimal version of your
IP to your PROLL image,
and a map from "HEXIP.PROL" to your real kernel image. If
you are using "Embedded-Root" option, you point to your
"Embedded-Root" Filesystem plus Kernel image. If you are
using the "NFS-Root" option, you need to point to the
normal "vmlinux.aout" image, plus have a separate map of
IP->nfsroot location. For sake of completeness,
you might also want a "HEXIP.SUN4M" -> "HEXIP
" map, as that is the custom way of dealing with net boot
situations with the Sun.
Example for java01 booting from "NFS-Root":
$ ls -ld /tftpboot
-rw-r--r-- 1 root root 89608 Mar 20 10:15 proll.aout.krups.11
-rw-r--r-- 1 root root 52732 Mar 17 11:52 proll.aout.mrcoffee.11
lrwxrwxrwx 1 root root 19 Mar 20 10:16 proll.krups -> proll.aout.krups.11
lrwxrwxrwx 1 root root 22 Mar 17 11:54 proll.mrcoffee -> proll.aout.mrcoffee.11
lrwxrwxrwx 1 root root 10 Apr 1 13:00 C0A88001.SUN4M -> COA88001
lrwxrwxrwx 1 root root 10 Apr 1 13:00 C0A88001 -> proll.mrcoffee
lrwxrwxrwx 1 root root 12 Apr 1 13:00 C0A88001.PROL -> vmlinux.aout
-rw-r--r-- 1 root root 1456189 May 21 12:53 vmlinux.aout
-rw-r--r-- 1 root root 6743821 Apr 1 12:53 vmlinux_embed.aout
lrwxrwxrwx 1 root root 18 Apr 1 12:53 192.168.128.1 -> /path/to/nfsroot
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Example for java01 booting from "Embedded-Root" boot image:
$ ls -ld /tftpboot
-rw-r--r-- 1 root root 89608 Mar 20 10:15 proll.aout.krups.11
-rw-r--r-- 1 root root 52732 Mar 17 11:52 proll.aout.mrcoffee.11
lrwxrwxrwx 1 root root 19 Mar 20 10:16 proll.krups -> proll.aout.krups.11
lrwxrwxrwx 1 root root 22 Mar 17 11:54 proll.mrcoffee -> proll.aout.mrcoffee.11
lrwxrwxrwx 1 root root 10 Apr 1 13:00 C0A88001.SUN4M -> COA88001
lrwxrwxrwx 1 root root 10 Apr 1 13:00 C0A88001 -> proll.mrcoffee
lrwxrwxrwx 1 root root 12 Apr 1 13:00 C0A88001.PROL -> vmlinux_embed.aout
-rw-r--r-- 1 root root 1456189 May 21 12:53 vmlinux.aout
-rw-r--r-- 1 root root 6743821 Apr 1 12:53 vmlinux_embed.aout
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