%TOC% ---+ Cloning the sample image The way to go would be like this: * Create the root & swap partitions <verbatim>lvcreate -L 12G -n arc02_root vg_root lvcreate -L 4G -n arc02_swap vg_root mkswap /dev/vg_root/lrms02_swap -L SWAP-hdb1</verbatim> * from xen11:<verbatim>cat /scratch/sample_root.img | ssh xen14 'cat > /dev/vg_root/lrms01_root_REPLACE_THIS_DEVICE'</verbatim> * Create the xen config file <verbatim>cp /etc/xen/sample /etc/xen/arc02</verbatim> * Mount the new image <verbatim>kpartx -a /dev/vg_root/arc02_root mount /dev/mapper/arc02_root1 /mnt</verbatim> * run =./finalize_xen_guest.sh HOSTNAME MAC= * Umount the image <verbatim>cd / umount /mnt kpartx -d /dev/vg_root/arc02_root</verbatim> NOTE-NOTE-NOTE: Avoid using the dash (-) in the name of the images, because it triggers a bug (added by FG, 20100825) ---+ Creation of a Xen Sample image We begin from a working virtual machine *already shut down*, that we cloned somewhere with dd like this: <verbatim>lvcreate -L 12G -n sample_root vg_root dd if=/dev/vg_root/ui64_root of=/dev/vg_root/sample_root</verbatim> Then, we need to create a /etc/xen/sample file with this content: <verbatim>name = "@@SIMPLENAME@@" vcpus = 2 memory = 4096 disk = ['phy:/dev/vg_root/@@SIMPLENAME@@_root,xvda,w', 'phy:/dev/vg_root/@@SIMPLENAME@@_swap,xvdb,w'] vif = ['mac=@@MAC@@,bridge=xenbr0'] bootloader = "/usr/bin/pygrub" on_reboot = 'restart' on_crash = 'destroy'</verbatim> Afterward we need to mount the sample image from the xen host, but we need to map it first (it's a partitioned block device): <verbatim>kpartx -a /dev/vg_root/sample_root mount /dev/mapper/sample_root1 /mnt/</verbatim> To find the files to change, running a =grep test54 /mnt/etc/* -R= will help, but see below. Then go file by file and change to fit this variables (examples, they need to match the finalize_xen script): * @@NAME@@ * @@IP_LAST@@ (last two digits of the IP, to be able to match 148.187 and 10.10 interfaces with the same field) You may want also to do some tweaking to the ifcfg-eth*: * Delete the line HWADDR if you are setting up static IP addresses (so that you don't need a Mac adddress specified, it works with any) And this is the list of the files that were changed<verbatim>/mnt/etc/dhclient-eth0.conf /mnt/etc/hosts /mnt/etc/sysconfig/network /mnt/etc/sysconfig/networking/profiles/default/ifcfg-eth0 /mnt/etc/sysconfig/networking/profiles/default/ifcfg-eth1 /mnt/etc/sysconfig/networking/profiles/default/network</verbatim> Furthermore, you want to delete the local host ssh keys that are generated the first time sshd starts, to be unique in the next boot. =rm /mnt/etc/ssh/ssh_host_*= Also, you would like to enable access to the xen console: * edit /etc/inittab and add the line =co:2345:respawn:/sbin/agetty xvc0 9600 vt100-nav= to the console lists. You can comment the rest out. * edit /etc/securetty and add the line =xvc0= At the end we need to umount the sample image and unmap it: <verbatim>cd / umount /mnt kpartx -d /dev/vg_root/sample_root</verbatim> -- Main.PabloFernandez - 2010-02-18
This topic: LCGTier2
>
WebHome
>
HardwareInformation
>
XenSampleImageReplication
Topic revision: r19 - 2011-09-02 - PabloFernandez
Copyright © 2008-2024 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki?
Send feedback