KVM Installation and deployment

One 、 Create a new virtual machine first , Good configuration ip Address , Close the firewall and selinux

# close selinux
[root@tools ~]# getenforce 
Permissive

# Turn off firewall 
[root@tools ~]# systemctl stop firewalld && systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.

# To configure ip Address 
[root@tools ~]# tail -4 /etc/sysconfig/network-scripts/ifcfg-ens33 
IPADDR=192.168.2.13
PREFIX=24
GATEWAY=192.168.2.2
DNS1=114.114.114.114

Two 、 To configure yum

# Move yum.repos.d All the documents under to media in 
[root@tools ~]# mv /etc/yum.repos.d/* /media/ | ll /etc/yum.repos.d/
total 0

# Required for transmission yum Mount and make documents repo Source 
[root@tools ~]# mv kvm_yum /opt/
[root@tools ~]# ll /opt/
total 0
drwxr-xr-x. 5 root root 53 Apr  6 12:44 kvm_yum

# Make yum Source 
[root@tools ~]# vim /etc/yum.repos.d/kvm.repo
[root@tools ~]# head -n 6 /etc/yum.repos.d/kvm.repo 
[kvm]
name=kvm
baseurl=file:///opt/kvm_yum
gpgcheck=0
enabled=1

# Verification source 
[root@tools ~]# yum repolist
Loaded plugins: fastestmirror
Determining fastest mirrors
kvm                                                                   | 3.6 kB  00:00:00     
(1/2): kvm/group_gz                                                   | 166 kB  00:00:00     
(2/2): kvm/primary_db                                                 | 3.1 MB  00:00:00     
repo id                                      repo name                                 status
kvm                                          kvm                                       4,021
repolist: 4,021

3、 ... and 、 install kvm Software and tools and start the virtual machine

usage: qemu-kvm [options] [disk_image]
'disk_image' is a raw hard disk image for IDE hard disk 0

# Software to install  
[root@tools ~]# yum -y install qemu-kvm openssl libvirt

# start-up libvirt service 
[root@tools ~]# systemctl start libvirtd

# Give the file executable rights 
[root@tools ~]# chmod +x qemu-ifup-NAT.txt 
[root@tools ~]# ll
-rw-r--r--. 1 root root   13287936 Apr  6 12:43 cirros-0.3.3-x86_64-disk.img
-rwxr-xr-x. 1 root root       2094 Apr  6 12:43 qemu-ifup-NAT.txt

# Establish a soft connection , Connect kvm The source file 
[root@tools ~]# ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-kvm
[root@tools ~]# ll -d /usr/bin/qemu-kvm 
lrwxrwxrwx. 1 root root 21 Apr  6 13:14 /usr/bin/qemu-kvm -> /usr/libexec/qemu-kvm

# start-up kvm Program , Start virtual machine 
[root@tools ~]# qemu-kvm -m 1024 -drive file=/root/cirros-0.3.3-x86_64.img,if=virtio -net nic,model=virtio -net tap,script=/root/qemu-ifup-NAT.txt -nographic -vnc :1


 ____               ____  ____
 / __/ __ ____ ____ / __ \/ __/
/ /__ / // __// __// /_/ /\ \ 
\___//_//_/  /_/   \____/___/ 
   http://cirros-cloud.net


login as 'cirros' user. default password: 'cubswin:)'. use 'sudo' for root.
cirros login: cirros 
Password: 
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.76/24 brd 192.168.122.255 scope global eth0
    inet6 fe80::5054:ff:fe12:3456/64 scope link 
       valid_lft forever preferred_lft forever