centos 7系統安裝配置kvm軟體步驟

在centos 6 環境下KVM的安裝部分，我寫過kvm虛擬化小結（一）kvm環境安裝 。由於centos 7較之前的版本有了很大的變化，目前測試了centos 7 環境下kvm的安裝與搭建，具體如下。

一、安裝kvm 軟體

由於之前已做過較詳細的 kvm 的安裝與總結，這裡只大致列下步驟：

代碼如下	複製代碼
[root@361way ~]# yum -y install qemu-kvm libvirt virt-install bridge-utils [root@361way ~]# lsmod | grep kvm  # make sure modules are loaded kvm                   441119  0 [root@361way ~]# systemctl start libvirtd [root@361way ~]# systemctl enable libvirtd

註：centos7上服務的管理方式換成了systemctl 。

二、配置網卡橋接

centos7上預設已不再是eth0、eth1 ，我的pc server上安裝好的第一塊網卡變成了enp3s0 ，修改步驟和centos 6上沒有區別，如下
 

代碼如下

複製代碼

[root@361way ~]# cd /etc/sysconfig/network-scripts/ [root@361way network-scripts]# cat ifcfg-br0 TYPE=Bridge BOOTPROTO=none DEVICE=br0 ONBOOT=yes IPADDR0=192.168.0.102 PREFIX0=24 GATEWAY0=192.168.0.1 [root@361way network-scripts]# cat ifcfg-enp3s0 DEVICE=enp3s0 TYPE=Ethernet ONBOOT=yes BRIDGE=br0 [root@361way ~]reboot [root@361way network-scripts]# ifconfig br0: flags=4163  mtu 1500         inet 192.168.0.102  netmask 255.255.255.0  broadcast 192.168.0.255         inet6 fe80::7a24:afff:fe46:ca60  prefixlen 64  scopeid 0x20         ether 78:24:af:46:ca:60  txqueuelen 0  (Ethernet)         RX packets 129  bytes 14676 (14.3 KiB)         RX errors 0  dropped 0  overruns 0  frame 0         TX packets 148  bytes 21994 (21.4 KiB)         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0 enp3s0: flags=4163  mtu 1500         ether 78:24:af:46:ca:60  txqueuelen 1000  (Ethernet)         RX packets 129  bytes 16482 (16.0 KiB)         RX errors 0  dropped 0  overruns 0  frame 0         TX packets 148  bytes 21994 (21.4 KiB)         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0 lo: flags=73  mtu 65536         inet 127.0.0.1  netmask 255.0.0.0         inet6 ::1  prefixlen 128  scopeid 0x10         loop  txqueuelen 0  (Local Loopback)         RX packets 9  bytes 728 (728.0 B)         RX errors 0  dropped 0  overruns 0  frame 0         TX packets 9  bytes 728 (728.0 B)         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0 virbr0: flags=4099  mtu 1500         inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255         ether a6:88:9f:14:b2:66  txqueuelen 0  (Ethernet)         RX packets 0  bytes 0 (0.0 B)         RX errors 0  dropped 0  overruns 0  frame 0         TX packets 1  bytes 90 (90.0 B)         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0 [root@361way network-scripts]# ip add show 1: lo:  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: enp3s0:  mtu 1500 qdisc pfifo_fast master br0 state UP qlen 1000     link/ether 78:24:af:46:ca:60 brd ff:ff:ff:ff:ff:ff 3: br0:  mtu 1500 qdisc noqueue state UP     link/ether 78:24:af:46:ca:60 brd ff:ff:ff:ff:ff:ff     inet 192.168.0.102/24 brd 192.168.0.255 scope global br0        valid_lft forever preferred_lft forever     inet6 fe80::7a24:afff:fe46:ca60/64 scope link        valid_lft forever preferred_lft forever 4: virbr0:  mtu 1500 qdisc noqueue state DOWN     link/ether a6:88:9f:14:b2:66 brd ff:ff:ff:ff:ff:ff     inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0        valid_lft forever preferred_lft forever

註：由於ip 命令屬於iproute2軟體包中的工具，由於代替舊的ifconfig命令，儘可能的習慣使用新的命令和工具包來淘汰老的軟體和工具。

三、selinux防火牆關閉

代碼如下	複製代碼
# setenforce  0 # sed -i 's/=enforcing/=disabled/g' /etc/selinux/config