Differences between version 6 and predecessor to the previous major change of NFSRoot.
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| Newer page: | version 6 | Last edited on Saturday, July 12, 2003 4:27:39 pm | by DanielLawson | Revert |
| Older page: | version 4 | Last edited on Monday, May 12, 2003 12:30:17 am | by DanielLawson | Revert |
@@ -42,9 +42,9 @@
diskless-createbasetgz /tmp/nfsroot/ woody http://ftp.nz.debian.org/debian /tmp/base.tgz
This creates a new system under /tmp/nfsroot, from the specified mirror. It then tars this up into /tmp/base.tgz
-If you are using diskless, you'll also need to download a copy of diskless-image-simple. NOTE: do NOT install this on your server. Just download
it, and stop any debconf
from installing it too
. Copy the deb to /tmp (or to the same dir your base.tgz is in)
+If you are using diskless, you'll also need to download a copy of diskless-image-simple. NOTE: do NOT install this on your server. Download
it manually
from packages.debian.org
. Copy the deb to /tmp (or to the same dir your base.tgz is in)
Now, if you run diskless-newimage it will create a new diskless group image in the directory you specify. You must run this program from a directory containing base.tgz and diskless-image-simple
# cd /tmp
@@ -58,39 +58,28 @@
# diskless-newimage
Follow the instructions - the defaults are probably good enough
-
-This has created the basic nfsroot filesystem for you. Now you must create a newhost using this image (this allows you ot have per-host settings for hostname etc). Use diskless-newhost /path/to/deskless/root <ip address of host>
NOTE: if you want to add things to your diskless image first, this is a good time to do it
chroot /var/lib/diskless/default/root
This puts you in a chroot jail inside the diskless image. You can use apt-get update and apt-get install to add new packages. EG, I added devfsd support here.
+
+As this is effectivly a debian install which has only done the first reboot, you may wish to finish the install. Inside the chroot run /usr/sbin/base-config and run as usual.
Also, if you want to change the template files for /etc on your diskless machines, you can do that here. Edit /usr/lib/diskless-image/template/etc/<file> inside the chroot appropriately, before you run diskless-newhost
Note: the templates reside in the above path *inside* the chroot, or else look in /var/lib/diskless/default/root/usr/lib/diskless-image/template/etc/<file>
+You now have a basic nfsroot filesystem. Now you must create a newhost using this image (this allows you to have per-host settings for hostname etc). Use:
-
-
-
-
+ # diskless-newhost /path/to/deskless/root <ip address of host>
! Set up the kernel for your nfsroot
If you made a debian kernel-package, copy it to /var/lib/diskless/default/root/root (or wherever you put your default image), then chroot to /var/lib/diskless/default/root, and run dpkg -i root/kernel-image.....
You'll also need to copy the kernel image to /tftpboot/. Name it something useful. I called it 'nfsroot-kernel'
-
-As we are going to boot via nfsroot, we need to set up a special device to use for this.
- mknod /dev/boot255 c 0 255
-
-Will create a /dev/boot255 device we can boot from. This will also need to exist within your diskless image:
- mkdod /var/lib/diskless/default/root/dev/boot255 c 0 255
-
-Now, use rdev to tell the nfsroot-kernel to boot from that device:
- rdev /tftpboot/nfsroot-kernel /dev/boot255
! Set up TFTP
Make a directory for the tftp root dir. I usually use /tftpboot
Under debian, make sure you have the following entries in /etc/inetd.conf:
@@ -98,9 +87,9 @@
This tells tftp to use /tftproot as its root - all paths are now relative to this.
! Set up DHCP
-Make sure your dhcpd config file contains something like:
+Make sure your dhcpd config file contains something like (for dhcp 2.x, default in Debian Woody)
:
allow bootp;
allow booting;
@@ -127,25 +116,28 @@
default nfs
label nfs
kernel netboot-kernel
- append root=/dev/boot255
\
+ append root=/dev/nfs
\
nfsroot=10.66.1.1:/var/lib/diskless/default/root/ \
- ip=:10.66.1.1:10.66.1.1:255.255.255.:::
+ ip=dhcp
+
+** IMPORTANT
: concatenate the 'append' line, and remove the \ characters
Note, that the default file is the the default configuration file for the client. PXE actually searches first of all for its IP address printed in hexadecimal, then drops a byte off, and continues looking for this until it has to give up and use the default file. This lets you add a config file for each host you boot via PXE.
This pxe config file sets the default boot option to nfs. It tells it to boot the kernel 'netboot-kernel' which it gets via tftp. It appends the specified kernel options to the kernel. These options are all, as far as I can tell, ABSOLUTELY required.
! Set up NFS
You'll need to add something like the following lines to /etc/exports
+
+ # per-host diskless exports
/var/lib/diskless/default/10.66.1.104 10.66.1.104(rw,no_root_squash)
- /home 10.66.1.0/255.255.255.0(rw,no_root_squash)
-
+ # global diskless exports
+ /home 10.66.1.0/255.255.255.0(rw,no_root_squash)
/var/lib/diskless/default/root 10.66.1.0/255.255.255.0(rw,no_root_squash)
- /usr 10.66.1.0/255.255.255.0(ro,no_root_squash)
Note that these are different from the suggested options in the diskless package. I found mounting NFS root ro caused a lot problems.
Restart your nfs server (/etc/init.d/nfs-kernel-server restart in debian) and you are away
