The first thing you need to do is install the KVM Packages
sudo yum install @Virt* sudo yum install kvm* sudo yum install libvirt*
Next you will want to restart the libvertd
sudo service libvertd restart
Now check to make sure its set to start on boot
sudo chkconfig --list | grep libvirtd
if it is not run the following
sudo chkconfig libvrtd on
At this point the KVM should be installed and working.
To run the GUI manager type:
If you are having trouble with connecting to the qemu then run the following:
lsmod | grep kvm
If this doesn't return a value there is an issue. Double check that your bios has VT enabled.
Now if you want each VM to act as if they are their own entity on the network with their own IP we need to change some things. I will say this.... I was on a machine with NIS configured and was doing all these changes while my user and once the network is broken, you as the user become unknown when the NIS server can't be reached. Do all the following as root.
Locate your ethernet config file in /etc/sysconfig/network-scripts/
Lets back it up first
cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0.bak
Open up the ifcfg file and this is all I have in mine.
DEVICE="eth0" HWADDR=XX:XX:XX:XX:XX:XX ONBOOT=yes BRIDGE=br0 NM_CONTROLLED=no
The hwaddr is probably already there so don't change the value. Also the bridge name is what I called the next file so it can be whatever as long as the two match.
Lets create a new file
DEVICE="br0" TYPE=Bridge DELAY=0 ONBOOT="yes" BOOTPROTO=static IPADDR=X.X.X.X NETWMASK=X.X.X.X GATEWAY=X.X.X.X DNS1=X.X.X.X DNS2=X.X.X.X DOMAIN=test.local PEERNDS="yes" NM_CONTROLLED="no"
Like I mentioned the DEVICE name must match the BRIDGE name above.
service network restart
To show if the bridge is up and working run
If you are running iptables we need to add some new rules to it
iptables -I FORWARD -m physdev --physdev-is-bridged -j ACCEPT service iptables save service iptables restart
Next we need to add some kernel settings. Open /etc/sysctl.conf
Add the following:
net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0
Close and save. Run the following to verify they were added.
sysctl -p /etc/sysctl.conf service libvirtd reload
I had issues with NetworkManager so I turned it off
chkconfig NetworkManager off
Now reboot and run virt-manager to start building your VM.
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