First of all, read official handbook chapter
Diskless Operation with PXE.
In short, your server(s) must be:
1. NFS server serving root FS for you diskless clients.
2. TFTP server which will serve
pxeboot file.
3. DHCP server which will provide clients with IP address, boot file name and location.
If i understand you correctly, all three parts is working, and when booted you have read-only root. I have used bsdinstall to fetch and extract clean system root to
/mnt/diskless dir. Server's IP is 10.101.0.1, client gets fixed IP from DHCP server using per-MAC config in
dhcpd.conf. Here's files from my diskless server with which diskless clients boots and mounts read-only root and make memory FS
/var and
/tmp.
I'm using 11.3-RELEASE for server and clients.
/etc/rc.conf:
Code:
hostname="virt"
ifconfig_em1="inet 10.101.0.1/24"
sshd_enable="YES"
ntpd_enable="YES"
inetd_enable="YES"
nfs_server_enable="YES"
nfs_server_flags="-u -t -n 4 -h 10.101.0.1"
rpcbind_enable="YES"
mountd_enable="YES"
mountd_flags="-l -r"
rpc_lockd_enable="YES"
rpc_statd_enable="YES"
nfsuserd_enable="YES"
nfsuserd_flags="-verbose -domain local"
nfsv4_server_enable="YES"
dhcpd_enable="YES"
dhcpd_ifaces="em1"
/etc/exports:
Code:
/mnt/diskless -maproot=root -network 10.101.0 -mask 255.255.255.0
/mnt/diskless/etc/fstab:
Code:
10.101.0.1:/mnt/diskless / nfs ro 0 0
conf dir in diskless root
Code:
# ls /mnt/diskless/conf
total 8
drwxr-xr-x 3 root wheel 512 14 авг. 15:33 10.101.0.20
drwxr-xr-x 2 root wheel 512 14 авг. 15:40 base
default
/etc and
/var for all clients (done as said in Handbook chapter, see link)
Code:
# ls /mnt/diskless/conf/base
total 960
-rw-r--r-- 1 root wheel 356664 14 авг. 15:40 etc.cpio.gz
-rw-r--r-- 1 root wheel 582993 14 авг. 14:43 var.cpio.gz
particular diskless client's
/etc dir
Code:
# ls /mnt/diskless/conf/10.101.0.20/etc/
total 112
-rw-r--r-- 1 root wheel 360 14 авг. 15:39 fstab
-rw-r--r-- 1 root wheel 476 5 июля 08:47 group
-rw-r--r-- 1 root wheel 1162 15 авг. 00:18 hosts
-rw------- 1 root wheel 1720 5 июля 08:47 master.passwd
-rw-r--r-- 1 root wheel 6 14 авг. 15:31 md_size
-rw-r--r-- 1 root wheel 47 15 авг. 00:21 motd
-rw-r--r-- 1 root wheel 1596 5 июля 08:47 passwd
-rw-r--r-- 1 root wheel 40960 5 июля 08:47 pwd.db
-rw-r--r-- 1 root wheel 250 15 авг. 03:35 rc.conf
-rw------- 1 root wheel 40960 5 июля 08:47 spwd.db
I need different
fstab for this client to mount some other share,
md_size contains string "20000" to make size of
/etc dir 10Mb instead of default 5Mb.
TFTP server:
Code:
# cat /etc/inetd.conf | grep tftpboot
tftp dgram udp wait root /usr/libexec/tftpd tftpd -l -s /mnt/tftpboot
Code:
# ls -l /mnt/tftpboot
total 252
-r--r--r-- 1 root wheel 256000 14 авг. 10:38 pxeboot
DHCP server (i'm using pkg
isc-dhcp44-server)
Code:
# cat /usr/local/etc/dhcpd.conf
subnet 10.101.0.0 netmask 255.255.255.0 {
range 10.101.0.50 10.101.0.99;
filename "pxeboot";
option root-path "10.101.0.1:/mnt/diskless";
next-server 10.101.0.1;
}
host fixed_netboot {
hardware ethernet 00:50:56:30:fe:f6;
fixed-address 10.101.0.20;
}
And here's what i have on diskless client when booted:
Code:
# mount
10.101.0.1:/mnt/diskless on / (nfs, read-only)
devfs on /dev (devfs, local, multilabel)
tmpfs on /etc (tmpfs, local)
tmpfs on /var (tmpfs, local)
procfs on /proc (procfs, local)
tmpfs on /var (tmpfs, local)
tmpfs on /tmp (tmpfs, local)
# df -h
Filesystem Size Used Avail Capacity Mounted on
10.101.0.1:/mnt/diskless 9.7G 952M 8.0G 10% /
devfs 1.0K 1.0K 0B 100% /dev
tmpfs 9.8M 3.0M 6.7M 31% /etc
tmpfs 5.0M 5.0M 0B 100% /var
procfs 4.0K 4.0K 0B 100% /proc
tmpfs 32M 124K 32M 0% /var
tmpfs 20M 8.0K 20M 0% /tmp
/etc,
/var and
/tmp are writeble, and for some reason mounted twice.
