install KVM on CentOS 6.3 , use SPICE

[ install KVM on CentOS 6.3 ]

# cat /etc/centos-release CentOS release 6.3 (Final) # uname -rn centos6-1.localdomain 2.6.32-279.2.1.el6.x86_64

# yum groupinstall Virtulization "Virtualization Platform" "Virtualization Client" "Virtualization Tools"

# /usr/libexec/qemu-kvm --version QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2), Copyright (c) 2003-2008 Fabrice Bellard # virt-manager --version 0.9.0 # libvirtd --version libvirtd (libvirt) 0.9.10

start libvirtd

# /etc/init.d/libvirtd start Starting libvirtd daemon:                                  [  OK  ]

connect to hypervisor with virsh to confirm whether or not libvirtd and virsh work.

# virsh --connect qemu:///system Welcome to virsh, the virtualization interactive terminal. Type:  'help' for help with commands       'quit' to quit virsh # quit

connect to the hypervisor with root user.
If you try this with regular users , you will see the following error

$ LANG=C virsh --connect qemu:///system error: authentication failed: Authorization requires authentication but no agent is available. error: failed to connect to the hypervisor

Same issue will occur with virt-manager.

root user

# virt-manager

connect to the hypervisor

non root user

$ virt-manager

can’t connect

error messages are like this:

File "/usr/lib64/python2.6/site-packages/libvirt.py", line 102, in openAuth    if ret is None:raise libvirtError('virConnectOpenAuth() failed') libvirtError: authentication failed: Authorization requires authentication but no agent is available.

add a bridge interface ( not mandatory )
trun on network and turn off NetworkManager.

# chkconfig NetworkManager off # chkconfig network on # chkconfig --list | grep -i network NetworkManager  0:off   1:off   2:off   3:off   4:off   5:off   6:off network         0:off   1:off   2:on    3:on    4:on    5:on    6:off

I’ll associate eth0 with br0.

# pwd /etc/sysconfig/network-scripts # cp ifcfg-eth0 ifcfg-br0

edit ifcfg-eth0 like this:

# egrep -v ^# ifcfg-eth0 TYPE=Ethernet DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="Auto eth0" DEVICE="eth0" UUID=zzz ONBOOT=yes HWADDR=zz BRIDGE="br0"

edit ifcfg-br0 like this:

# egrep -v ^# ifcfg-br0 TYPE=Bridge BOOTPROTO=none DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="br0" DEVICE="br0" UUID=zz ONBOOT=yes HWADDR=zz IPADDR=x.x.x.x PREFIX=24 GATEWAY=z.z.z.z DNS1=y.y.y.y

stop NetworkManager and start network.

# /etc/init.d/NetworkManager stop;/etc/init.d/network restart

Okay , I could create bridge interface which is associated with eth0.

# brctl show bridge name     bridge id               STP enabled     interfaces br0             8000.002655e1aefa       no              eth0 virbr0          8000.525400fd7ade       yes             virbr0-nic

[ build a CentOS 6 VM with virt-manager and SPICE ]

install spice packages

# yum install spice-server spice-client spice-protocol –y

change display settings to Spice from VNC

# virsh list --all Id    Name                           State ---------------------------------------------------- 1     centos6-64-1                   running # virsh dumpxml 1 | grep -i spice    <channel type='spicevmc'>      <target type='virtio' name='com.redhat.spice.0'/>    <graphics type='spice' port='5900' autoport='yes' keymap='ja'/>

connect to the VM with spice client

# spicec -h 127.0.0.1 -p 5900

virsh # list --all Id    Name                           State ---------------------------------------------------- 3     centos6-64-1                   running virsh # qemu-monitor-command 3 --hmp 'info spice' Server:     address: 127.0.0.1:5900        auth: none Channel:     address: 127.0.0.1:50420     session: 1714636915     channel: 1:0 Channel:     address: 127.0.0.1:50421     session: 1714636915     channel: 6:0 Channel:     address: 127.0.0.1:50422     session: 1714636915     channel: 5:0 Channel:     address: 127.0.0.1:50423     session: 1714636915     channel: 4:0 Channel:     address: 127.0.0.1:50424     session: 1714636915     channel: 2:0 Channel:     address: 127.0.0.1:50425     session: 1714636915     channel: 3:0 virsh #