kvm虚拟化

kvm部署

环境说明：

系统类型	IP
RHEL7	192.168.218.134

kvm安装

• 关闭防火墙和selinux

[root@192 ~]# systemctl disable --now firewalld 
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@192 ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
[root@kvm ~]# systemctl disable --now firewalld 
[root@kvm ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
[root@kvm ~]# reboot

• kvm安装

//安装依赖包
[root@kvm ~]# yum -y install epel-release vim wget net-tools unzip zip gcc gcc-c++

//kvm安装
[root@kvm ~]# yum -y install qemu-kvm qemu-kvm-tools qemu-img virt-manager libvirt libvirt-python libvirt-client virt-install virt-viewer bridge-utils libguestfs-tools

//因为虚拟机中网络，我们一般都是和公司的其他服务器是同一个网段，所以我们需要把 \
KVM服务器的网卡配置成桥接模式。这样的话KVM的虚拟机就可以通过该桥接网卡和公司内部 \
其他服务器处于同一网段
//查看网卡信息
[root@kvm ~]# ip a 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:df:75:4c brd ff:ff:ff:ff:ff:ff
    inet 192.168.218.139/24 brd 192.168.218.255 scope global noprefixroute dynamic ens33
       valid_lft 1455sec preferred_lft 1455sec
    inet6 fe80::85bb:54ea:c3cb:5d54/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

//此处我的网卡是ens33，所以用br0来桥接ens33网卡
[root@kvm ~]# cd /etc/sysconfig/network-scripts/
[root@kvm network-scripts]# ls 
ifcfg-ens33     //其他文件不展示了
[root@kvm network-scripts]# cp ifcfg-ens33 ifcfg-br0
[root@kvm network-scripts]# vi ifcfg-br0 
TYPE=Bridge
DEVICE=br0
NM_CONTROLLED=no
BOOTPROTO=static
NAME=br0
ONBOOT=yes
IPADDR=192.168.218.139
NETMASK=255.255.255.0
GATEWAY=192.168.218.2
DNS1=114.114.114.114
DNS2=8.8.8.8

[root@kvm network-scripts]# vi ifcfg-ens33 
TYPE=Ethernet
BOOTPROTO=static
NAME=ens33
DEVICE=ens33
ONBOOT=yes
BRIDGE=br0
NM_CONTROLLED=no

//重启网络
[root@kvm ~]# systemctl restart network
[root@kvm network-scripts]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP group default qlen 1000
    link/ether 00:0c:29:df:75:4c brd ff:ff:ff:ff:ff: