CentOS-7 安装KVM
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yum install qemu-kvm qemu-kvm-tools virt-manager libvirt virt-install -y
[[email protected] ~]# grep -E ‘(vmx|svm)‘ /proc/cpuinfo flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm arat epb pln pts dtherm tpr_shadow vnmi ept vpid fsgsbase smep #如果没有内容则不支持
[[email protected] ~]# qemu-img create -f raw /opt/Centos-7.3-x86_64.raw 10G Formatting ‘/opt/Centos-7.3-x86_64.raw‘, fmt=raw size=10737418240
systemctl enable libvirtd.service service libvirtd start
[[email protected] ~]# service libvirtd status Redirecting to /bin/systemctl status libvirtd.service ● libvirtd.service - Virtualization daemon Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled) Active: active (running) since 五 2017-05-26 14:41:33 CST; 7min ago Docs: man:libvirtd(8) http://libvirt.org Main PID: 912 (libvirtd) CGroup: /system.slice/libvirtd.service ├─ 912 /usr/sbin/libvirtd ├─2441 /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr... └─2449 /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr... 5月 26 14:41:24 localhost.localdomain systemd[1]: Starting Virtualization daemon... 5月 26 14:41:33 localhost.localdomain systemd[1]: Started Virtualization daemon. 5月 26 14:41:38 localhost.localdomain dnsmasq[2441]: started, version 2.66 cachesize 150 5月 26 14:41:38 localhost.localdomain dnsmasq[2441]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN DH...auth 5月 26 14:41:38 localhost.localdomain dnsmasq-dhcp[2441]: DHCP, IP range 192.168.122.2 -- 192.168.122.254, leas... 1h 5月 26 14:41:38 localhost.localdomain dnsmasq[2441]: reading /etc/resolv.conf 5月 26 14:41:38 localhost.localdomain dnsmasq[2441]: using nameserver 192.168.106.2#53 5月 26 14:41:38 localhost.localdomain dnsmasq[2441]: read /etc/hosts - 2 addresses 5月 26 14:41:38 localhost.localdomain dnsmasq[2441]: read /var/lib/libvirt/dnsmasq/default.addnhosts - 0 addresses 5月 26 14:41:38 localhost.localdomain dnsmasq-dhcp[2441]: read /var/lib/libvirt/dnsmasq/default.hostsfile Hint: Some lines were ellipsized, use -l to show in full.
[[email protected] ~]# dd if=/dev/cdrom of=/opt/CentOs-7.3.iso 记录了8554496+0 的读入 记录了8554496+0 的写出 4379901952字节(4.4 GB)已复制，137.034 秒，32.0 MB/秒
[[email protected] ~]# virt-install --name CentOS-7.3-x86_64 --virt-type kvm --ram 1024 --cdrom=/opt/CentOs-7.3.iso --disk path=/opt/Centos-7.3-x86_64.raw --network network=default --graphics vnc,listen=0.0.0.0 --noautoconsole 开始安装...... 创建域...... | 0 B 00:00:01 域安装仍在进行。您可以重新连接 到控制台以便完成安装进程。 [[email protected] ~]#
VNC连接：
CentOS-7安装的时候让网卡名称默认变成eth0的方法：
按TAB键，后面加入：
net.ifnames=0 biosdevname=0
[[email protected] qemu]# virsh list --all Id 名称 状态 ---------------------------------------------------- - CentOS-7.3-x86_64 关闭 - CentOS-7.3-x86_64_1 关闭
[[email protected] qemu]# virsh start CentOS-7.3-x86_64_1 域 CentOS-7.3-x86_64_1 已开始
改CPU： [[email protected] qemu]# pwd /etc/libvirt/qemu [[email protected] qemu]# virsh edit CentOS-7.3-x86_64_1 <vcpu placement=‘auto‘ current="1">4</vcpu> 重启： [[email protected] qemu]# virsh shutdown CentOS-7.3-x86_64_1 [[email protected] qemu]# virsh start CentOS-7.3-x86_64_1 [[email protected] qemu]# virsh setvcpus CentOS-7.3-x86_64_1 2 --live #热添加或热减少
改内存： virsh edit CentOS-7.3-x86_64_1 <memory unit=‘KiB‘>4048576</memory> 重启： [[email protected] qemu]# virsh shutdown CentOS-7.3-x86_64_1 [[email protected] qemu]# virsh start CentOS-7.3-x86_64_1 virsh qemu-monitor-command CentOS-7.3-x86_64_1 --hmp --cmd balloon 500 #热添加或热减少
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