1Hi all. For doing anything,we have to first think of the need / reason behind it, unless you are doing that as a hobby. In
wikiocean1, when I was first asked to do remastering for openbravo and crm, I was a little bit doubtful since I am going to do it first time. But then I kept faith on open source community documentation (which is always there) and agreed.
Our company, wikiocean wants to make hundreds of installations of openbravo and crm at various location. There may not be internet connection. So company want all in one cd / dvd. So that even our hardware people can install it. In company we were using ubuntu / kubutu7.04. So the obvious choice is kubuntu7.04 for user friendly look and feel for end user.
There is plenty of help available on forums and other sources. Also my friend Amit Karpe also helped me whenever required.
For that I followed following common steps for sugarcrm and openbravo both . There are some changes also. For openbravo there should be tomcat and postgres which is crucial. For crm, there should be php and mysql. The final openbravo dvd is in ready to install state without requiring other resources. The final CRM disc is in all installed state.
Install or Server Install CD.
System Requirements1. At least 3-5 GB of free space
2.At least 512 MB RAM and 1 GB swap (recommended)
3.squashfs-tools
4.mkisofs
5.An Ubuntu kernel with squashfs support (present in Ubuntu 6.06 and later)
6.QEMU, VirtualBox or VMware for testing (l tried with qemu and vbox. But for my 512mb RAM which I later updated to 1 gb; they are too slow.)
Steps : To Load the squashfs module:
sudo modprobe squashfs
To copy image of 7.04 ubuntu:
mkdir ~/image
cp kubuntu-7.04-i386.iso ~/image/
cd ~/image
Mount the iso image:
sudo mount -o loop kubuntu-7.04-i386.iso /mnt
Extract .iso contents into dir 'extracted' (create it first):
rsync --exclude=/casper/filesystem.squashfs -a /mnt/ extracted
Mount the squashfs filesystem:
mkdir squash
sudo mount -t squashfs -o loop /mnt/casper/filesystem.squashfs squash
Extract squashfs contents into dir "remaster":
sudo cp -a squash/* remaster/
To have network connection within chroot
sudo cp /etc/resolv.conf remaster/etc/
sudo cp /etc/hosts edit/etc/
Change the root to extracted root:
sudo chroot remaster
mount -t proc none /proc
mount -t sysfs none /sys
mount -t devpts none /dev/pts
For locale issues and import GPG keys:
export HOME=/root
export LC_ALL=C
CustomizationsTo view installed packages by size
dpkg-query -W --showformat='${Installed-Size} ${Package}\n' | sort -nr | less
to remove packages:
apt-get remove --purge package-name
Then added some new packages:
apt-get install package-name
Can also execute other commands fr customization. But avoid playing with users and rights or ownerships.
To remove any temporary files :
apt-get clean
rm -rf /tmp/*
rm /etc/resolv.conf
To unmount special filesystems and exit
umount /proc
umount /sys
umount /dev/pts
exit
To create iso image:
chmod +w extracted/casper/filesystem.manifest
sudo chroot remaster dpkg-query -W --showformat='${Package} ${Version}\n' > extracted/casper/filesystem.manifest
sudo cp extracted/casper/filesystem.manifest
extracted/casper/filesystem.manifest-desktop
sudo sed -ie '/ubiquity/d' extracted/casper/filesystem.manifest-desktop
To Compress filesystem:
sudo rm extracted/casper/filesystem.squashfs (*missing)
sudo mksquashfs remaster extracted/casper/filesystem.squashfs
Then image name is changed to ERP in file extracted/README.diskdefines
To calculate and replace md5sum:
sudo -s
rm extracted/md5sum.txt
(cd extracted && find . -type f -print0 | xargs -0 md5sum > md5sum.txt)
exit
To Create Iso:
cd extracted
sudo mkisofs -r -V "$IMAGE_NAME" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ../ubunTRO0.2-i386-customERP.iso .
