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Date: Thu, 14 Sep 2000 23:27:41 +1100 (EST)
From: =?iso-8859-1?q?Paul=20Jansen?= <vlaero@yahoo.com.au>
Subject: nfs swap for diskless boot?
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I'm having some problems booting a diskless kernel. 
I've used the kernel options below in my custom
compiled kernel:

options         BOOTP           # Use BOOTP to obtain
IP address/hostname
  options         BOOTP_NFSROOT   # NFS mount root
filesystem using BOOTP info
  options         BOOTP_NFSV3     # Use NFS v3 to NFS
mount root
  options         BOOTP_COMPAT    # Workaround for
broken bootp daemons.

I'm using the ISC v2 DHCP server.  THis is my
dhcpd.conf file:

# dhcpd.conf

# option definitions common to all supported
networks...
option domain-name "jansen.org";
option domain-name-servers 202.167.41.130;
option subnet-mask 255.255.255.0;
default-lease-time 600;
max-lease-time 7200;

subnet 192.168.0.0 netmask 255.255.255.0 {
  range dynamic-bootp 192.168.0.10 192.168.0.20;
  option routers 192.168.0.8;
  option broadcast-address 192.168.0.255;
  filename "/tftpboot/kernel.XWORKSTATION";
  option root-path
"192.168.0.1:/usr/diskless/rootfs/xworkstation";
  option option-176 5;
  option option-160 "timeout=8:default=193:";
  option option-192 "IJ2:::/tftpboot/kernel.ij2:";
  option option-193
"XWORKSTATION:::/tftpboot/kernel.XWORKSTATION:";

host host11 {
  hardware ethernet 0:aa:0:c1:74:47;
  server-name "edessa.jansen.org";
  option option-128
"192.168.0.1:/usr/diskless/swap/swap.192.168.0.11";
}

host host12 {
  hardware ethernet 0:0:1:17:37:6;
  server-name "edessa.jansen.org";
  option option-128
"192.168.0.1:/usr/diskless/swap/swap.192.168.0.12";
}
 

Here's my /etc/exports file:

/usr -alldirs -maproot=0:0   edessa pico host10 host11
host12 host13


I have mountd running as 'mountd -r' so as to enable
NFS mounting of files.


I have created the swapfile referenced above
(/usr/diskless/swap/swap.192.168.0.11) by doing:

dd if=/dev/zero
of=/usr/diskless/swap/swap.192.168.0.11 bs=1M count=32

This is the series of messages that come up on the
console (after some kernel information has already
come up:

bootpc testing starting
bootpc hw address is 0:99:0:C1:74:47
my ip address is 192.168.0.11
server ip address is 192.168.0.1
gateway ip address is 0.0.0.0
server name is edessa.jansen.org
bootfile is /tftpboot/kernel.XWORKSTATION
subnetmask is 255.255.255.0
router is 192.168.0.8
ignoring field type 15
rootfs is
192.168.0.1:/usr/diskless/rootfs/xworkstation
Ignoring field type 28
swapfs is
192.168.0.1:/usr/diskless/swap/swap.192.168.0.11
ignoring fieldtype 160
ignoring fieldtype 176
ignoring fieldtype 192
ignoring fieldtype 193
panic: nfs_boot: lookup swap, error=2

synching disks...
done.
Uptime: 1s

Automatic reboot in 15 seconds
press a key on the console to abort





Where can I find info on this stuff?  I've searched
the man pages, mailing lsits, done a seach on
daemonnews.  The informatino in the freebsd handbook
on diskless booting is badly out of date.
Can anyone help me with what might be wrong?


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