Live Linux P2V
Here's how to clone a live, powered-on machine to a VMWare VM.
The test case scenario is a conversion from an HP BL460 to a Version 4 ESX VM, with LSI Logic parallel virtual SCSI controller and one e1000 vnic.
Linux version is Red Hat 5.5 x64
UPDATE: I've made some encouraging experiments with 6.2 also
Important: this method does not guarantee data consistency, as the disk will be copied while active, but it's usually good enought to bring up a bootable copy of the source machine where you can later restore a consistent backup.
On the other hand, this procedure gives way less downtime than a cold clone, and you can test the cloning process without halting the source machine.
Onward I will call the source machine "P" and the destination machine "V".
Take note of the P disk configuration
# fdisk -l /dev/cciss/c0d0
Disk /dev/cciss/c0d0: 146.7 GB, 146778685440 bytes
255 heads, 32 sectors/track, 35132 cylinders
Units = cylinders of 8160 * 512 = 4177920 bytes
Device Boot Start End Blocks Id System
/dev/cciss/c0d0p1 1 25 101984 83 Linux
/dev/cciss/c0d0p2 26 23961 97658880 8e Linux LVM
This is an HP machine with a SmartArray controller.
Create a new VM, called V, with a disk at least as big a the P one: in this case I've created a 147GB vmdk.
Boot the V VM into rescue mode.
boot: linux rescue
Start the network interface and assign an IP enabled for SSH with the P machine.
Skip searching for existing installations.
All the following commands are to be executed on the V machine.
Now dump the P hard drive to the V vmdk:
# ssh root@P "cat /dev/cciss/c0d0 | gzip -1 | cat" | gzip -d >/dev/sda
note that this compresses the data over the wire, as this usually leads to faster transfers, even more if the disk has many empty sectors.
After completion, an fdisk should display the same partition table of the P machine on the V machine
# fdisk -l /dev/sda
Disk /dev/sda: 157.8 GB, 157840048128 bytes
255 heads, 32 sectors/track, 37779 cylinders
Units = cylinders of 8160 * 512 = 4177920 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 25 101984 83 Linux
/dev/sda2 26 23961 97658880 8e Linux LVM
Reboot V into rescue mode again
boot: linux rescue
This time choose to search for existing installations, as it should find the new disk content.
# chroot /mnt/sysimage
Make sure the LVM has seen the new disk
# pvscan
PV /dev/sda2 VG VolGroup00 lvm2 [93.13 GB / 59.13 GB free]
If you don't see the PV, check /etc/lvm/lvm.conf for any filter other than the default one.
Modify the boot modules list taking as an example those of another identically configured VM.
This is the modprobe.conf of a tipical ESX VM.
# vi /etc/modprobe.conf
alias eth0 e1000
alias scsi_hostadapter mptbase
alias scsi_hostadapter1 mptspi
alias scsi_hostadapter2 ata_piix
Rebuild the initial ram disk, as referenced in the grub.conf
# mkinitrd -v -f /boot/initrd-2.6.18-194.el5.img 2.6.18-194.el5
Reinstall grub, just to be safe (it should be already there from the disk cloning process).
# grub-install /dev/sda
Now note that, after reboot, the V machine will start with the same IP address of the original P one.
If it doesn't suit your need, change the IP address in /etc/sysconfig/network-scripts/ifcfg-eth0
Now you can reboot the V machine.
If the M machine was at runlevel 5, the V machine may start with corrupted graphics because of the different video driver of the VM.
Switch to runlevel 3 and reconfigure X with
# system-config-display --reconfig
Now you can proceed with vmware-tools installation as usual on VMs.
Thursday, September 12, 2013
live linux p2v
so. vmware sometimes hates me. sometimes i have to do this to p2v a live system.
boot from knoppix and off you go.
from: http://pleasedonttouchthescreen.blogspot.com/2011/12/live-linux-p2v.html
is it or is it not x64?
yes.
root@here:/root# getconf LONG_BIT 64 root@here:/root# uname -m x86_64no.
root@here:/root# getconf LONG_BIT 32 root@here:/root# uname -m i686
Wednesday, September 4, 2013
openstack cloud in the cloud
from: http://devstack.org/guides/single-vm.html
works fine with ubuntu 12 lts on vmware esx 5.1
Running a Cloud in a VM Use the cloud to build the cloud! Use your cloud to launch new versions of OpenStack in about 5 minutes. When you break it, start over! The VMs launched in the cloud will be slow as they are running in QEMU (emulation), but their primary use is testing OpenStack development and operation. Speed not required. Prerequisites Cloud & Image Virtual Machine DevStack should run in any virtual machine running a supported Linux release. It will perform best with 2Gb or more of RAM. OpenStack Deployment & cloud-init If the cloud service has an image with cloud-init pre-installed, use it. You can get one from Ubuntu's Daily Build site if necessary. This will enable you to launch VMs with userdata that installs everything at boot time. If you are directly using a hypervisor like Xen, kvm or VirtualBox you can manually kick off the script below in a bare-bones server installation. Installation shake and bake Launching with using Userdata The userdata script grabs the latest version of DevStack via git, creates a minimal localrc file and kicks off stack.sh. #!/bin/sh apt-get update || yum update -y apt-get install -qqy git || yum install -y git git clone https://github.com/openstack-dev/devstack.git cd devstack echo ADMIN_PASSWORD=password > localrc echo MYSQL_PASSWORD=password >> localrc echo RABBIT_PASSWORD=password >> localrc echo SERVICE_PASSWORD=password >> localrc echo SERVICE_TOKEN=tokentoken >> localrc ./stack.sh Launching By Hand Using a hypervisor directly, launch the VM and either manually perform the steps in the script above or copy it into the VM. Using OpenStack At this point you should be able to access the dashboard. Launch VMs and if you give them floating IPs access those VMs from other machines on your network. One interesting use case is for developers working on a VM on their laptop. Once stack.sh has completed once, all of the pre-requisite packages are installed in the VM and the source trees checked out. Setting OFFLINE=True in localrc enables stack.sh to run multiple times without an Internet connection. DevStack, making hacking at the lake possible since 2012!
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