Libvirt-1.0.4 and qemu-1.4 compilation installation under ubuntu12.04

The reason for compilation and installation is mainly to test its new features by using the latest libvirt and qemu versions.

1. libvirt-1.0.4 compilation Installation
(1) install GCC and dependent Software

1. Sudo apt-Get install libxml2-dev libgnutls-Dev
   Libdevmapper-dev Python-dev libnl-dev libpciaccess-Dev
   Build-essential

(2) Configure Configuration

1. ./Configure -- prefix =/usr -- localstatedir =/var -- sysconfdir =/etc

(3) Compile and install

1. Make & sudo make install

2. qemu-1.4 compilation Installation
(1) install the dependent software, where UML-utilities
Bridge-utils is used for KVM bridges. If no bridge is used, you do not need to install

1. Sudo apt-Get install libzip-dev libsdl1.2-Dev
   UML-utilities DH-autoreconf bridge-utils

(2) Configure Configuration

1. ./Configure -- target-list = x86_64-softmmu -- prefix =/usr -- localstatedir =/var -- sysconfdir =/etc

(3) Compile and install: Make & sudo make install

3. Problems encountered and Solutions
Question 1:
Error: failed to connect to the hypervisor
Error: no valid connection
Error: failed to connect socket to '/var/run/libvirt-Sock': no such file or directory
Libmongod is not started. Just start it.

1. Sudo libmongod-d

Question 2:
Dylan @ LAPTOP :~ $ Virsh net-start default
Error: failed to get network 'default'
Error: network not found: No network with matching name 'default'

This is because libvirt does not create the default network. You can create it manually:

1. Virsh net-Define/etc/libvirt/qemu/networks/Default. xml
   
2. Vrsh net-start default