CentOS 7 System Installation Configure KVM software steps

In the KVM installation section under CentOS 6, I wrote a summary of KVM virtualization (i) KVM environment installation. As the CentOS 7 compared to the previous version has changed a lot, the current test CentOS 7 Environment KVM installation and construction, as follows.

First, the installation of KVM software

Since you have previously done a more detailed KVM installation and summary, here are just a few steps:

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[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

Note: Centos7 on the service management mode replaced by SYSTEMCTL.

Two, configure the network card bridge to connect

Centos7 on the default is no longer eth0, eth1, my PC server installed the first network card into the ENP3S0, the modification steps and CentOS 6 no difference, as follows

The code is as follows

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[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 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 (90.0 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

Note: As the IP command belongs to the tools in the Iproute2 package, as a substitute for the old ifconfig command, it is customary to use new commands and tools to eliminate old software and tools.

Third, SELinux firewall shutdown

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# Setenforce   0 # sed-i ' s/=enforcing/=disabled/g '/etc/selinux/config