Install kvm in centos 7.0

Install kvm in centos 7.0

PRE-INSTALL

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Kvm-related installation packages and their functions

Major kvm packages of qemu-KVM

Command Line tools and libraries required for creating virtual machines using python-javasinst

Virt-manager GUI Virtual Machine Management Tool

Virt-top VM statistics command

Virt-viewer GUI Connection Program, connected to the configured Virtual Machine

Libvirt C language toolkit, provides libvirt Service

C language Toolkit provided by libvirt-client for virtual clients

Virt-install Virtual Machine creation Command Based on libvirt Service

Bridge-utils tools for creating and managing bridge Devices

INSTALL

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[Root @ localhost ~] # Yum install qemu-kvm libvirt virt-install bridge-utils

# Check whether the kvm module is loaded

[Root @ kvm ~] # Lsmod | grep kvm

Kvm_intel 138567 0

Kvm 441119 1 kvm_intel

# If the two are not available, you can use "modprobe kvm" to load them;

# Related commands "insmod; rmmod; modinfo"

# Start libmongod

[Root @ localhost ~] # Systemctl start libcmdd; systemctl enable libcmdd

[Root @ localhost ~] # Systemctl list-unit-files | grep lib1_d

Libmongod. service enabled

NETWORK CONFIGURATION

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# Modifying the NIC file eno16777736

[Root @ kvm ~] # Cd/etc/sysconfig/network-scripts/

[Root @ kvm network-scripts] # echo "BRIDGE = br0"> ifcfg-eno16777736 # Add "BRIDGE = br0" to the ifcfg-e ** original Nic File"

# Create a bridge file ifcfg-br0 (Bridge name), add the following content

[Root @ kvm network-scripts] # vi ifcfg-br0

**************************************** *********

DEVICE = br0

TYPE = "Bridge" # case sensitive, so it must be Bridge

BOOTPROTO = "dhcp"

ONBOOT = "yes"

DELAY = "0"

STP = "yes" # This line is used to start STP, which is related to the result of brctl command line.

**************************************** *********

# Restart NetworkManager and network services:

[Root @ kvm network-scripts] # systemctl restart NetworkManager

# After you manually modify the NIC file, restart the NetworkManager service to take over the network configuration again.

# Solution when the NIC configuration file conflicts with the NetworkManager configuration: {1. Restart NetworkManager; 2. Disable NetworkManager}

[Root @ kvm network-scripts] # systemctl restart network

[Root @ kvm network-scripts] # ip a # ip command used to view and manage ip information

1: lo: <LOOPBACK, UP, LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

Link/loopback 00: 00: 00: 00: 00: 00 brd 00: 00: 00: 00: 00: 00

Inet 127.0.0.1/8 scope host lo

Valid_lft forever preferred_lft forever

Inet6: 1/128 scope host

Valid_lft forever preferred_lft forever

2: eno16777736: <BROADCAST, MULTICAST, UP, LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP qlen 1000

Link/ether 00: 0c: 29: 61: 5c: 1d brd ff: ff

3: virbr0: <NO-CARRIER, BROADCAST, MULTICAST, UP> mtu 1500 qdisc noqueue state DOWN

Link/ether 52: 54: 00: b6: 45: 5b brd ff: ff

Inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

Valid_lft forever preferred_lft forever

4: virbr0-nic: <BROADCAST, MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 500

Link/ether 52: 54: 00: b6: 45: 5b brd ff: ff

6: br0: <BROADCAST, MULTICAST, UP, LOWER_UP> mtu 1500 qdisc noqueue state UP

Link/ether 00: 0c: 29: 61: 5c: 1d brd ff: ff

Inet 192.168.0.32/24 brd 192.168.0.255 scope global dynamic br0

Valid_lft 11979sec preferred_lft 11979sec

Inet6 fe80: 20c: 29ff: fe61: 5c1d/64 scope link

Valid_lft forever preferred_lft forever

7: vnet0: <BROADCAST, MULTICAST, UP, LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN qlen 500

Link/ether fe: 54: 00: cb: 63: b2 brd ff: ff

Inet6 fe80: fc54: ff: fecb: 63b2/64 scope link

Valid_lft forever preferred_lft forever

# Viewing bridge connections

[Root @ kvm network-scripts] # brctl show # brctl is a bridge connection management command

Bridge name bridge id STP enabled interfaces # If no STP = yes is set above, no is displayed here

Br0 8000.000c29615c1d yes eno16777736

Vnet0

Virbr0 8000.525400b6455b yes virbr0-nic

CLOSE SELINUX

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[Root @ kvm network-scripts] # setenforce 0

[Root @ kvm network-scripts] # getenforce

Permissive

[Root @ kvm network-scripts] # vi/etc/selinux/config

**************************************** **

SELINUX = permissive # modify the configuration file to make it permanently effective

**************************************** **

CREATE A VM

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[Root @ kvm ~] # Mkdir-p/var/kvm/images

[Root @ kvm ~] # Virt-install \

-- Network bridge: br0 \

-- Name vm1 \

-- Ram = 1024 \

-- Vcpus = 1 \

-- Disk path =/var/kvm/images/vm1.img, size = 10 \

-- Graphics none \

-- Location 'HTTP: // ftp.iij.ad.jp/pub/linux/centos/7/ OS /x86_64 /'\

-- Extra-args = "console = tty0 console = ttys0. 115200"

# For details about the meaning of each parameter, you can view the extended information.

# The installation process will allow you to choose textmode or vnc. Select textmode to continue installation.

# If the network is faulty, try to use -- cdrom/path/to/centos7.iso

# Virt-install -- name vm1 -- ram = 1024 -- vcpus = 1 -- network bridge: br0 -- disk path =/var/kvm/images/centos7.img, size = 10 -- graphics none -- location = http://ftp.iij.ad.jp/pub/linux/centos/7/ OS /x86_64/ -- extra-args = "console = tty0 console = ttyS0, 115200"

PS: Graphical Virtual Machine installation requires X-WINDOW and virt-manager, the operation before the installation of virtual machine is the same, the operation is very simple under the graphics

Extended Materials

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Http://wiki.centos.org/zh/HowTos/KVM

Http://techlinux.net/2014/09/kvm-centos-7/

Http://www.server-world.info/en/note? OS = CentOS_7 & p = kvm & f = 2

This article from the "Three 0 demon" blog, please be sure to keep this source http://301ren.blog.51cto.com/8887653/1631133