--- Brian Elliott Finley <[EMAIL PROTECTED]> wrote:
Hi Brian, Dann, list
Thanks very much for the patches, I eventually got everything done! I have
included a full list of every step taken at the end of this email, I'm
convinced I've done this the hard way but it does all work ;) If there's an
easier way, I would just rather not know!
> I'm fine with the idea, but have modified the message a bit, and have
> reduced the number of ping attempts to seven. I figure, if we're not
> actually going to fail, but are going to proceed anyway, it's just an
> informative thing to give someone a "happy it's working" feeling, so if
> it hasn't succeeded in 7 pings, let's not delay the install any longer.
>
>
> Here's the fresh code snippet:
>
> while [ "$PING_EXIT_STATUS" != "0" ]
> do
> echo "PING ATTEMPT $PING_COUNT: "
> ping -c 1 $IMAGESERVER; PING_EXIT_STATUS=$?; PING_COUNT=$((
> $PING_COUNT + 1 ))
> if [ "$PING_COUNT" = "7" ]; then
> echo
> echo " WARNING: Cannot ping the image server \"$IMAGESERVER\""
> echo " Despite this seemingly depressing result, I
> will attempt"
> echo " to proceed with the install. Your imageserver
> may be"
> echo " configured to not respond to pings, but it
> wouldn't hurt"
> echo " to double check that your networking equipment
> is"
> echo " working properly!"
> echo
> sleep 5
^^^^^^^^ You need to set: PING_EXIT_STATUS=0 here or the pings
just go on and on...
> fi
> done
>
> if [ "$PING_EXIT_STATUS" = "0" ]; then
> echo
> echo " We have connectivity to the Image Server!"
> fi
OK so here are full instructions for taking apart a Systemimager boot cd -
making an initrd change and recreating a bootable ISO:
All this done on RH9 as root, in /root
1) Mount a systemimager CD : mount /mnt/cdrom
2) Make a directory to work in : mkdir systemimager
3) cd systemimager
4) cp /mnt/cdrom/boot/siboot.img ./
5) Make a loopback mountpoint for siboot.img : mkdir ./siboot_mnt
6) Mount the siboot.img file : mount -o loop siboot.img ./siboot_mnt
7) Copy out the initrd.img to CWD : cp siboot_mnt/initrd.img ./initrd.gz
8) Uncompress the initrd file : gunzip initrd.gz
9) Make a loopback mountpoint for initrd : mkdir ./initrd_mnt
10) Mount the initrd : mount -o loop initrd initrd_mnt/
11) Make a directory you can copy the loopback device files to:
mkdir initrd_copy
12) Copy the files to this directory : cp -a initrd_mnt/* initrd_copy/
13) mkdir initrd_copy/lib initrd_copy/proc initrd_copy/tmp
14) mount --bind initrd_copy/lib initrd_copy/dev
15) mount --bind initrd_copy/proc initrd_copy/new_root
16) mount --bind initrd_copy/tmp initrd_copy/root
17) Apply your patch! In this case its a :
vim initrd_copy/etc/init.d/rcS to fix PING_EXIT_STATUS
18) Reset permissions on all changed files : chown -R 20800:64 initrd_copy/
19) Make a cramfs filesystem of your changes : mkcramfs initrd_copy/ initrd
20) Make a temporary mountpoint, mount the initrd and check your changes!!!
mkdir tmp_mount;mount -o loop initrd tmp_mount
cat tmp_mount/etc/init.d/rcS | grep <changes>
21) umount tmp_mount/
22) You now have a working cramfs initrd. gzip and rename it and chmod it:
gzip initrd; mv initrd.gz initrd.img;chmod 755 initrd.img
23) Now we need to make a bootable filesystem from this:
24) mkdir iso
25) dd if=/dev/zero of=iso/siboot.img bs=1k count=2880
26) /sbin/mkdosfs iso/siboot.img
27) syslinux -s iso/siboot.img
28) mkdir iso/siboot_mount
29) mount -t msdos -o loop iso/siboot.img iso/siboot_mount/
30) cp initrd.img iso/siboot_mount/
31) cp -a siboot_mnt/* iso/siboot_mount/
Answer "No" to overwriting initrd.img and ldlinux.sys
32) If you want to modify the default systemimager message text:
vim iso/siboot_mount/message.txt
33) mkdir -p iso/iso_build_dir/boot; umount iso/siboot_mount/
34) cp iso/siboot.img iso/iso_build_dir/boot/
35) cd iso/iso_build_dir
36) mkisofs -b boot/siboot.img -c boot/boot.catalog -o image.iso .
37) cd ../../;umount siboot_mnt; umount initrd_mnt; umount /mnt/cdrom
38) cd
39) umount systemimager/initrd_copy/dev/
40) umount systemimager/initrd_copy/new_root/
41) umount systemimager/initrd_copy/root/
42) burn ISO!
I hope this saves someone else some hassle one day ;)
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