describes technical aspects. I want to note, that technical aspects depend a biton certain version of kernel, aufs and cloop you're using. For example some smallchanges in code (functions argument type change and alike) are necessary. I usedaufs-20061113 and cloop-2.05-1 because these versions were used on in KNOPPIX 5.1.1.2.6.18-8.el5-028stab027 OpenVZ kernel was used.

# Create Somehow obtain OpenVZ Debian package packages: kernel, vzctl, vzquota and some other kernel-related packagestemplate# Uninstall old previous Linux kernel and related packages from extracted tree and# install Install OpenVZ kernel Debian packages there# Uninstall some packages from extracted tree in order to free some space for# the next step# Install vzctl/vzquota/templates in the tree

# Build aufs and cloop kernel modules against OpenVZ kernel# Copy required kernel these modules in appropriate places on the disc# Modify initrd image of KNOPPIX

 Let's copy contents of this iso to to the hard drive:

rm -f r mnt

variouse various applications. On CD all this information is stored in one a single file:

 KNOPPIX.img file can be mounted using usual '-o loop' option. Next our step is to create a copy of KNOPPIX file system tree on the hard drivedisk.Note, that we can't use 'cp' tool here, because of hardlinks and special files. We need to should use rsynс:

 Now we should set up OpenVZ environment in obtained tree: kernel, vzctl, vzquota, template. For vzctl and vzquota we can use precompiled packages from http://debian.systs.org. But at the moment we have to create kernel Debian package by self, because at the moment we need additional patches in order all to work smoothly (but this it will be unnecessary soon, when patches will be included in main OpenVZ patch). This is important to use KNOPPIX default kernel config! The creators of LiveCD take a lot of care about customizing config file in such manner, that CD will suite as many users as possible. We shouldn't throw away such great job. We do `make oldconfig` and press enter all the time. Additionally some config options should be turn off at the moment. (http://bugzilla.openvz.org/show_bug.cgi?id=433): CONFIG_MATH_EMULATION, CONFIG_SJCD, CONFIG_OPTCD, CONFIG_AZTCD, CONFIG_BLK_DEV_XD, CONFIG_AUTOFS_FS, CONFIG_SND_WAVEFRONT.I created a Debian VE on my machine and install there kernel-package package, that allows to create Debian kernel packages easily. After that the creation of package is something like that:

vim linux-2.6.18-8.el5-028test027/Makefile # here we add right releaseextraversion: -8.el5-028test027cp kernellinux-2.6.19 linux-2.6.18-i686/.config.ovz cd linux-2.6.18/-8.el5-028test027make oldconfig # pressing enter herevim .config # switching off some config options

 Don't delete sources and compilation of this kernel. A bit later we'll need to build aufs and cloop kernel modules against this kernel.Now I download vzctl and vzquota Debian packages from http://debian.systs.org and on a template:

Now copy Copying packages to KNOPPIX tree and chroot there:

 In chrooted environment we need to remove all kernel related packages. In KNOPPIX 5.1.1 2.6.19 vanilla kernel is used, so we can easilyidentifyidentify all kernel-related packages and eliminate them using this knowledge:

apt-get remove linuxtlinux-image-2.6.19

And now install new Installing OpenVZ tools (don't be afraid about warnings: they are ok)

[TODO: remove other Here I want to note one thing. We added some data to the KNOPPIX image,so its size increased. If you want to burn iso on CD/DVD later you shouldthink of removing some packages to free disk space]. I miss this point, but you're aware.Cleaning After all we need to clean upchrooted environment:

 That's greategreat, now we have all the tree ready, let's compress it in the new image using create_compressed_fs tooland copy to the right place:

Now we need The next our step is to compile aufs and cloop kernel modules for our new against OpenVZ kernel. Let's start from cloop module.We uncomment one A definition in sourcemust be commented, because we're using RHEL-based kernel. The patch below shows what to do:

OKGetting the sources, let's compile cloopbuilding:

vim compressed_loop.c # uncommenting define here

 After that you should have cloop.ko file in current directory. Later we will copy it to appropriate place.What about aufs? Get this module the sources from cvs. I use this used 20061113 version (20061113), because this version is used in KNOPPIX 5.1.1.The following changes are required in AUFSaufs, because we use 're using rhel5-based kernel:

TODOBuilding aufs: (FOR NEWER AUFS ONE MORE PATCH with "(deleted)"<pre></pre>

Now you have aufs.ko file in current directory. Next we need to add these modules to the disc:<pre>cp aufs.ko cloop.ko cd-contents/KNOPPIX/modules/</pre>  When booting KNOOPIX uses initrd image,where it stores some kernel modules required to get access to the CD-drive.We need to remove old modules and add new one to initrd image. Extracting andmounting initrd:<pre>mkdir initrdcd initrdcp cd-contents/boot/isolinux/minirt.gz ./gunzip minirt.gzmkdir mntmount -o loop minirt mnt</pre> The modules directory on initrd contents kernel modules. Now we should replace these modules byequivalents from OpenVZ kernel. Note, that some modules can missing, because we use other kernel.Just remove modules, that are missing. After this operation is done copy new minirt.gz to the appropriate place:<pre>umount mntgzip minirtcp minirt.gz ../cd-contents/boot/isolinux/cd ..</pre> The last major step is to copy vmlinuz to isolinux directory:<pre>cp vmlinuz-2.6.18-8.el5-028stab027 cd-contents/boot/isolinux/linux</pre> Actually, now we're ready to create iso image with KNOPPIX OpenVZ LiveCD.But I describe a bit cosmetic changes now. First, we want to add OpenVZ logo and sloganto the startup screen of KNOPPIX. This picture is stored in boot/isolinux/logo.16 file in lss16 format.To convert this image to gif format we should install syslinux and netpbm-progs packages.After that the following actions should be done:<pre>mkdir boot-picturecp cd-contents/boot/isolinux/logo.16 boot-picture/cd boot-picturelss16toppm < logo.16 > logo.ppmppmtogif < logo.ppm > logo.gif</pre> Then I edit OpenVZ logo using gimp and save the image in bmp format.Converting and copying logo to the appropriate place:<pre>bmptoppm < logo.bmp > logo.ppmppmtolss16 < logo.ppm > logo.16cd ..cp boot-picture/logo.16 cd-contents/boot/isolinux/logo.16</pre> Knoppix uses KDE as Window Manager and after KDE is loaded you can see the web pagewith information about using KNOPPIX. Of course, we want you to see the informationabout basics of using OpenVZ. So we write a page: [TODO[Basic operations in OpenVZ]] CREATE GOOD CONTENTS TABLE OF THIS PARTand saved itin cd-contents/KNOPPIX/ directory. Then we just edited etc/X11/Xsession.d/45xsession file so,that Basic_operations_in_OpenVZ.html.html file is opened on KDE start. Great, let's write it all on CD:<pre>chmod -R u+w cd-contentsrm cd-contents/boot/isolinux/boot.catmkisofs -b boot/isolinux/isolinux.bin -o KNOPPIX_V5.1.1-OPENVZ-CD-2007-01-04-EN.iso -no-emul-boot \ -l -J -r -boot-load-size 4 -boot-info-table KNOPPIX_V5.1.1CD-2007-01-04-EN.iso-content</pre>