Linux/centos system under the KVM installation configuration

1. KVM Related Software Installation

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sudo apt-get install QEMU-KVM libvirt-bin virt-manager bridge-utils

2, Bridge Network configuration

sudo vim/etc/network/interfaces edit the configuration file and modify the IP network information as follows:

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Auto Lo Iface Lo inet Loopback Auto Eth0 Iface eth0 inet Manual Auto Br0 Iface br0 inet Static Address 192.168.10.130 Network 192.168.10.0 Netmask 255.255.255.0 Broadcast 192.168.10.255 Gateway 192.168.10.1 Dns-nameservers 8.8.8.8 Bridge_ports eth0 BRIDGE_STP off BRIDGE_FD 0 Bridge_maxwait 0

The above IP according to their actual need to modify, if the network environment is DHCP access (in the production environment is rarely used, this also mentioned), you can modify the code as follows:

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Auto Lo Iface Lo inet Loopback Auto Eth0 Iface eth0 inet Manual Auto Br0 Iface br0 inet DHCP Bridge_ports eth0 BRIDGE_STP off BRIDGE_FD 0

Finally: sudo/etc/init.d/networking Restart restart the network service.

3. Route forwarding

Routing forwarding is used in NAT network, but I find that the KVM is installed in Ubuntu, and the default is to turn on the routing forwarding function, if it is not modified by the SYSCTL command.

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yang@yang-acer:/opt$ sudo sysctl-a|grep ' net.ipv4.ip_forward ' Net.ipv4.ip_forward = 1

4, qemu.conf and iptables

Edit/etc/libvirt/qemu.conf file, cancel Vnc_listen = "0.0.0.0" annotation, turn on VNC function, and sudo/etc/init.d/libvirt-bin Restart load new configuration, If the firewall is turned on, you also need to open the port through the following instructions:

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sudo iptables-a input-m tcp-p tcp--dport 5910-j ACCEPT

Note: On Ubuntu iptables Unlike CentOS, you can also use the UFW firewall configuration policy.

5, the guest host installation

To create a mirrored file and view file information:

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sudo qemu-img create-f qcow2-o preallocation=metadata centos.img 20G QEMU-IMG Info centos.img

Install guest host system with VNC:

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sudo virt-install--name centos--ram=1024--arch=x86_64--vcpus=1--os-variant=rhel6--disk path=/opt/centos.img,bus= Virtio,cache=none,format=qcow2--network bridge=br0,model=virtio--graphics vnc,password=361way,port=5913--cdrom=/ Opt/centos-6.5-x86_64-livecd.iso

Note: Here directly specify the QCOW2 format, and not the same as before, mirror file creation must also specify the Preallocation (pre-allocation) environment, or you can not directly format=qcow2 format installation.