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) # ### Next, populate the /etc/hosts file with the IP to hostname maps: ### /etc/hosts 192.168.128.100 lnxserv 192.168.128.1 java01 ### 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 ### 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 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) ### 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 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 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