How to install libguestfs on Ubuntu 11.04 64bit ver.

[ What’s libguestfs ? ]

http://libguestfs.org/

libguestfs enables you to modify/edit/view files form VM disk images.

There are many useful commands such as , guestfish , virt-cat , virt-copy-in , vrit-win-reg etc.

What an interesting tool xD

[ How to install libguestfs on Ubuntu11.04 ]

RHEL6 ( CentOS6 , SL6 , Fedora15 ) provides you with libguestfs rpm packages , so you can install libguestfs easily through yum command. On Ubuntu , however , you can’t install it via apt-get. Here’s an explanation of how to install libguestfs on Ubuntu 11.04 64bit ver.

# tail -2 /etc/lsb-release DISTRIB_CODENAME=natty DISTRIB_DESCRIPTION="Ubuntu 11.04" # uname -r 2.6.38-8-server

1.

add the following URLs to /etc/apt/sources.list and install packages which are needed for libguestfs.

# tail -3 /etc/apt/sources.list # Add for libguestfs deb http://gb.archive.ubuntu.com/ubuntu/ natty main deb http://gb.archive.ubuntu.com/ubuntu/ natty universe # apt-get install libhivex0 btrfs-tools cryptsetup diff libaugeas0 reiserfsprogs zfs-fuse jfsutils lvm2 scrub xfsprogs zerofree

2.

download insmod.static from http://libguestfs.org/download/binaries/ubuntu-packages/

# wget http://libguestfs.org/download/binaries/ubuntu-packages/insmod.static # cp insmod.static /sbin # chmod +x /sbin/insmod.static

3.

download deb packages from http://libguestfs.org/download/binaries/ubuntu-packages/

# ls febootstrap_3.6-1_amd64.deb        libguestfs-perl_1.11.8-1_amd64.deb guestfish_1.11.8-1_amd64.deb       libguestfs-tools_1.11.8-1_amd64.deb guestmount_1.11.8-1_amd64.deb      libguestfs0-dbg_1.11.8-1_amd64.deb libguestfs-dev_1.11.8-1_amd64.deb  libguestfs0_1.11.8-1_amd64.deb libguestfs-doc_1.11.8-1_all.deb    python-guestfs_1.11.8-1_amd64.deb

install all deb pakages

# dpkg -i *.deb

get things done :)

# guestfish --version guestfish 1.11.8 # guestfish Welcome to guestfish, the libguestfs filesystem interactive shell for editing virtual machine filesystems. Type: 'help' for help on commands      'man' to read the manual      'quit' to quit the shell ><fs>

[ How to use ]

- guestfish

mount VM disk image and view/edit files.

mount SL6-vm1’s virtual disk which is off-line VM.

# LANG=C virsh list --all Id Name                 State ----------------------------------  - BT5                  shut off  - SL6-vm1              shut off  - SL6-vm2              shut off # guestfish -i -d SL6-vm1 Welcome to guestfish, the libguestfs filesystem interactive shell for editing virtual machine filesystems. Type: 'help' for help on commands      'man' to read the manual      'quit' to quit the shell Operating system: Scientific Linux release 6.0 (Carbon) /dev/vda1 mounted on / ><fs>

You can check/edit all files in SL6-vm1’s virtual disk

><fs> cat /etc/sysconfig/network ><fs> edit /etc/sysconfig/network ><fs> exit #

- virt-cat

see a file (/var/log/messages) form a VM which is off-line

# LANG=C virsh list --all Id Name                 State ----------------------------------  - BT5                  shut off  - SL6-vm1              shut off  - SL6-vm2              shut off # virt-cat -d SL6-vm1 /var/log/messages | tail -1 Jul  7 17:06:31 SL6-vm1 rsyslogd: [origin software="rsyslogd" swVersion="4.6.2" x-pid="1030" x-info="http://www.rsyslog.com"] exiting on signal 15.

- virt-ls

list /root directory

# virt-ls -d ubuntu-vm1 /root .bash_history .bashrc .cache .lesshst .profile .rnd .selected_editor .ssh bind-9.8.0-P2.tar.gz

[ clone a Linux VM and change hostname and IP addresses before fly clone VM ]

make a clone VM ( original : SL6-vm1 , clone VM : SL6-vm3 )

# virt-clone --original SL6-vm1 --name SL6-vm3 --file /var/disk1/SL6-vm3.img 'SL6-vm3.img' を確保中                               | 9.8 GB     01:46 Clone 'SL6-vm3' created successfully.

change hostname and IPaddress setting of SL6-vm3 with guestfish

mount

# guestfish -i -d SL6-vm3 Welcome to guestfish, the libguestfs filesystem interactive shell for editing virtual machine filesystems. Type: 'help' for help on commands      'man' to read the manual      'quit' to quit the shell Operating system: Scientific Linux release 6.0 (Carbon) /dev/vda1 mounted on /

change hostname

><fs> edit /etc/sysconfig/network ><fs> cat /etc/sysconfig/network NETWORKING=yes HOSTNAME=SL6-vm3.localdomain

change MAC address from SL6-vm1’s (original VM )to SL6-vm3’s ( clone VM ).

You can check SL6-vm3’s MAC ( clone VM ) through vrish command

# virsh dumpxml SL6-vm3 | egrep "mac address"      <mac address='00:16:36:13:56:28'/>

SL6-vm1’s MAC ( original VM )

# virsh dumpxml SL6-vm1 | egrep "mac address"      <mac address='52:54:00:11:18:f1'/>

change red line (52:54:00:11:18:f1 -> 00:16:36:13:56:28 )

><fs> cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE="eth0" HWADDR="00:16:36:13:56:28"   NM_CONTROLLED="yes" ONBOOT="yes" BOOTPROTO="dhcp" ><fs> cat /etc/udev/rules.d/70-persistent-net.rules # This file was automatically generated by the /lib/udev/write_net_rules # program, run by the persistent-net-generator.rules rules file. # # You can modify it, as long as you keep each rule on a single # line, and change only the value of the NAME= key. # net device () (custom name provided by external tool) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:16:36:13:56:28", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" ><fs> quit

fly SL6-vm3

hostname and MAC address were changed.

# virsh start SL6-vm3 –console Scientific Linux release 6.0 (Carbon) Kernel 2.6.32-131.2.1.el6.x86_64 on an x86_64 SL6-vm3.localdomain login: root Password: Last login: Thu Jul  7 17:03:13 on ttyS0 [root@SL6-vm3 ~]# hostname SL6-vm3.localdomain # ifconfig eth0 | head -1 eth0      Link encap:Ethernet  HWaddr 00:16:36:13:56:28