“Centos7 使用kvm创建虚拟机”的版本间的差异
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（→1. KVM环境配置） |
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==1. KVM环境配置== | ==1. KVM环境配置== | ||
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| + | ===关闭Selinux=== | ||
| + | 修改SELINUX=disabled | ||
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| + | [root@ localhost ~]#vim /etc/sysconfig/selinux | ||
<nowiki> | <nowiki> | ||
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# 修改SELINUX=disabled | # 修改SELINUX=disabled | ||
# This file controls the state of SELinux on the system. | # This file controls the state of SELinux on the system. | ||
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# mls - Multi Level Security protection. | # mls - Multi Level Security protection. | ||
SELINUXTYPE=targeted | SELINUXTYPE=targeted | ||
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[root@ localhost ~]#setenforce 0 #当次生效，getenforce 查看当前selinux状态 | [root@ localhost ~]#setenforce 0 #当次生效，getenforce 查看当前selinux状态 | ||
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| + | ===关闭防火墙=== | ||
[root@ localhost ~]#systemctl stop firewalld | [root@ localhost ~]#systemctl stop firewalld | ||
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[root@ localhost ~]#systemctl disable firewalld | [root@ localhost ~]#systemctl disable firewalld | ||
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| + | ===查看是否支持虚拟机=== | ||
[root@localhost ~]# egrep -c '(vmx|svm)' /proc/cpuinfo | [root@localhost ~]# egrep -c '(vmx|svm)' /proc/cpuinfo | ||
2 | 2 | ||
2019年11月18日 (一) 12:41的版本
1. KVM环境配置
关闭Selinux
修改SELINUX=disabled
[root@ localhost ~]#vim /etc/sysconfig/selinux
# 修改SELINUX=disabled # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of these two values: # targeted - Targeted processes are protected, # mls - Multi Level Security protection. SELINUXTYPE=targeted [root@ localhost ~]#setenforce 0 #当次生效，getenforce 查看当前selinux状态 ===关闭防火墙=== [root@ localhost ~]#systemctl stop firewalld [root@ localhost ~]#systemctl disable firewalld ===查看是否支持虚拟机=== [root@localhost ~]# egrep -c '(vmx|svm)' /proc/cpuinfo 2 #如果执行这条命令的返回结果为0则表示CPU不支持虚拟化，如果返回结果为1或者大于1到数字则表示CPU支持虚拟。其中vmx为Intel的CPU指令集，svm为AMD的CPU指令集。
2. 安装KVM
（1）安装KVM软件包 [root@localhost ~]# yum install -y qemu-kvm libvirt virt-* bridge-utils （最后会报错，忽略就好，直接进行下一步） [root@localhost ~]# yum -y install libguestfs-tools （2）查看虚拟机环境 [root@localhost ~]#systemctl start libvirtd 启动libvirt服务 [root@localhost ~]#systemctl enable libvirtd [root@localhost ~]# ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-kvm 虚拟机执行kvm模块命令必做
3. 创建NAT模式KVM虚拟机
将cirros-0.3.3-x86_64-disk.img镜像与qemu-ifup-NAT脚本文件上传到系统/root目录下。
[root@localhost ~]# ls
cirros-0.3.3-x86_64-disk.img qemu-ifup-NAT
给脚本赋予执行权限。示例代码如下：
[root@localhost ~]# chmod +x /root/qemu-ifup-NAT
通过qemu-kvm命令启动KVM虚拟机。示例代码如下：
[root@localhost ~]# qemu-kvm -m 1024 -drive file=/root/cirros-0.3.3-x86_64-disk.img,if=virtio -net nic,model=virtio -net tap,script=/root/qemu-ifup-NAT -nographic -vnc :1
创建虚拟机完成后，cirros用户登录虚拟机，输入用户名为cirros，密码为cubswin:)。然后输入ip addr list命令查询IP地址，最后输入route -n命令查询路由表。示例代码如下：
$ ip addr list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.89/24 brd 192.168.122.255 scope global eth0
inet6 fe80::5054:ff:fe12:3456/64 scope link
valid_lft forever preferred_lft forever
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.122.1 0.0.0.0 UG 0 0 0 eth0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
