CentOS7系统kvm安装

   PRE-INSTALL（准备安装环境） 
 

   ============================================================= 
 

   kvm相关安装包及其作用 
 

   qemu-kvm 主要的KVM程序包 
 

   python-virtinst 创建虚拟机所需要的命令行工具和程序库 
 

   virt-manager GUI虚拟机管理工具 
 

   virt-top 虚拟机统计命令 
 

   virt-viewer GUI连接程序，连接到已配置好的虚拟机 
 

   libvirt C语言工具包，提供libvirt服务 
 

   libvirt-client 为虚拟客户机提供的C语言工具包 
 

   virt-install 基于libvirt服务的虚拟机创建命令 
 

   bridge-utils 创建和管理桥接设备的工具 
 

   INSTALL安装 
 

   1.查看是否加载kvm模块 
 

   [root@localhost ~]#  yum install qemu-kvm libvirt virt-install bridge-utils 
 

   [root@localhost ~]# lsmod|grep kvm 
 

   如果没有（kvm_intel 138567 0kvm 441119 1 kvm_intel）这两条，可以用"modprobe kvm"加载；#相关命令"insmod;rmmod;modinfo" 
 

   [root@localhost ~]# modprobe kvm 
 

   [root@localhost ~]# lsmod|grep kvm 
 

   kvm                   554609  0  
 

   irqbypass              13503  1 kvm 
 

   2启动libvirtd 
 

   [root@localhost ~]# systemctl start libvirtd;systemctl enable libvirtd 
 

   [root@localhost ~]# systemctl list-unit-files|grep libvirtd 
 

   libvirtd.service                            enabled  
 

   NETWORK CONFIGURATION（修改网卡配置文件） 
 

   1.修改网卡文件ens33 
 

   [root@localhost ~]# cd /etc/sysconfig/network-scripts/ 
 

   #在ifcfg-e**原网卡文件中增加"BRIDGE=br0" 
 

   [root@localhost network-scripts]# vim ifcfg-ens33 
 

 
  HWADDR=00:26:B9:36:54:FB 
 

 
  TYPE=Ethernet 
 

 
  BOOTPROTO=none 
 

 
  BRIDGE=br0 
 

 
  DEFROUTE=yes 
 

 
  PEERDNS=yes 
 

 
  PEERROUTES=yes 
 

 
  IPV4_FAILURE_FATAL=no 
 

 
  NAME=ens33 
 

 
  ONBOOT=yes 
 

   #新建网桥文件ifcfg-br0(网桥名称),增加内容如下 
 

   [root@localhost network-scripts]# vim ifcfg-br0 
 

 
  DEVICE=br0 
 

 
  STP=yes 
 

 
  TYPE=Bridge 
 

 
  BOOTPROTO=static 
 

 
  DEFROUTE=yes 
 

 
  IPV4_FAILURE_FATAL=no 
 

 
  NAME=br0 
 

 
  ONBOOT=yes 
 

 
  IPADDR=172.16.10.3 
 

 
  NETMASK=255.255.0.0 
 

 
  GATEMASTE=172.16.10.1 
 

￼

   #重启NetworkManager及network服务：  
 

   [root@localhost network-scripts]# systemctl restart NetworkManager 
 

   #当你手动修改了网卡文件后，需要重启NetworkManager服务来重新接管网络配置 
 

   #网卡配置文件和NetworkManager配置冲突时，解决方案:｛1、重启NetworkManager;2、关闭NetworkManager｝ 
 

   [root@localhost network-scripts]# systemctl stop NetworkManager 
 

   [root@localhost network-scripts]# systemctl restart network 
 

    #ip命令用来查看和管理ip信息 
 

   [root@localhost ~]# ip a 
 

   1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 
 

       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 qlen 1000 
 

       link/ether 00:0c:29:0e:d9:77 brd ff:ff:ff:ff:ff:ff 
 

   3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000 
 

       link/ether 52:54:00:f0:93:9c 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 
 

   4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000 
 

       link/ether 52:54:00:f0:93:9c brd ff:ff:ff:ff:ff:ff 
 

   5: br0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000 
 

       link/ether da:14:f5:b0:23:c3 brd ff:ff:ff:ff:ff:ff 
 

   #查看网桥连接 
 

   [root@localhost ~]# brctl show   #brctl是一个网桥连接管理命令 
 

   bridge name bridge id STP enabled interfaces  #如果上面不设置STP=yes，这里就会显示no 
 

   br0 8000.000000000000 yes 
 

   virbr0 8000.525400f0939c yes virbr0-nic 
 

   CLOSE SELINUX(关闭SELINUX) 
 

   [root@localhost ~]# setenforce 0 
 

   [root@localhost ~]# getenforce  
 

   Permissive 
 

   [root@localhost ~]# vim /etc/selinux/config（修改配置文件使其永久生效） 
 

   [root@localhost network-scripts]# yum -y install kvm python-virtinst libvirt virt-manager qemu-kvm-tools virt-viewer virt-v2v 
 

   [root@localhost network-scripts]# systemctl enable libvirtd && systemctl start libvirtd 
 

   [root@localhost network-scripts]# virsh list --all 
 

   Id    名称                         状态 
 

   ---------------------------------------------------- 
 

   CREATE A VM（创建一个kvm） 
 

   创建磁盘 
 

   [root@localhost ~]#  
  qemu-img create -f qcow2 testilanni02.img 10G 
 

   [root@localhost ~]# mkdir -p /var/kvm/images 
 

   [root@localhost ~]# virt-install \ 
 

   --networkbridge:br0 \ 
 

   --namevm1 \ 
 

   --ram=1024\ 
 

   --vcpus=1\ 
 

   --diskpath=/var/kvm/images/vm1.img,size=10 \ 
 

   --graphicsnone \ 
 

   --location'http://ftp.iij.ad.jp/pub/linux/centos/7/os/x86_64/'\ 
 

   --extra-args="console=tty0console=ttyS0,115200" 
 

   #详细每个参数的意义可以查看扩展资料 
 

   #安装过程会让你选择textmode 还是vnc,选择textmode继续安装吧 
 

   #如果网络会有问题的话，尽量选择用--cdrom /path/to/centos7.iso 
 

   # 
  virt-install --name Centos --virt-type kvm --ram  
  1024 
   --cdrom=/opt/CentOS- 
  7.1 
  .iso --disk path=/kvmdir/test.img  --network=bridge:br0 
   --graphics vnc,listen= 
  0.0 
  . 
  0.0 
   -- 
  noautoconsole 
  
 
 

   PS:图形化下安装虚拟机需要X-WINDOW和virt-manager，安装虚拟机之前的操作都一样，图形下操作很简单 
 

猜你喜欢