07-13-周一_11-01-36
This commit is contained in:
AaronXu
@@ -132,7 +132,7 @@ kvm有良好的图形化支持，所以我们可以先装一下桌面组件
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```bash
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[root@localhost ~]# yum grouplist
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[root@localhost ~]# yum groupinstall -y "GNOME 桌面"
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[root@localhost ~]# yum groupinstall -y "Server with GUI"
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```
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3. 启动图形化
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@@ -502,11 +502,11 @@ Formatting 'vm1-1.qcow2', fmt=qcow2 size=10737418240 encryption=off cluster_size
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```bash
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[root@localhost ~]# vim /etc/libvirt/qemu/vm1.xml
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<disk type='file' device='disk'>
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<driver name='qemu' type='qcow2'/>
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<source file='/var/lib/libvirt/images/vm1-1.qcow2'/>
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<disk type='volume' device='disk'>
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<driver name='qemu' type='qcow2' discard='unmap'/>
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<source pool='default' volume='ubuntu-22.04-1-1.qcow2'/>
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<target dev='vdb' bus='virtio'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x17' function='0x0'/>
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<address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
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</disk>
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```
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@@ -529,6 +529,12 @@ Formatting 'vm1-1.qcow2', fmt=qcow2 size=10737418240 encryption=off cluster_size
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连接到域 vm1
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换码符为 ^]
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# 如果没有输出的话，检查是否控制台输出到串口
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# vim /etc/default/grub
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# GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200n8"
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# update-grub
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# systemctl enable serial-getty@ttyS0.service
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# reboot
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CentOS Linux 7 (Core)
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Kernel 3.10.0-957.el7.x86_64 on an x86_64
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@@ -547,6 +553,12 @@ vda 252:0 0 10G 0 disk
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vdb 252:16 0 10G 0 disk
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```
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- **在线热插盘**
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```bash
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virsh attach-disk ubuntu-22.04-1 /var/lib/libvirt/images/ubuntu-22.04-1-1.qcow2 vdb --subdriver qcow2 --persistent
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```
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## CPU添加
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- 热添加的意思就是可以在虚拟机不重启的情况下，完成CPU的升级
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@@ -561,6 +573,10 @@ vdb 252:16 0 10G 0 disk
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<memory unit='KiB'>1048576</memory>
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<currentMemory unit='KiB'>1048576</currentMemory>
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<vcpu placement='auto' current='1'>4</vcpu> # 最大cpu使用4个，默认是1个
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# 改完这个配置后，必须要shutdown一下才可以生效
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# 查看是否生效
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[root@localhost ~]# virsh dumpxml ubuntu-22.04-1 | grep vcpu
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<vcpu placement='auto' current='1'>4</vcpu>
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[root@localhost ~]# virsh vcpucount vm1
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最大值 配置 4
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当前 配置 1
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@@ -826,43 +842,39 @@ virbr1 8000.525400a15e56 yes virbr1-nic
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<img src="KVM%E8%99%9A%E6%8B%9F%E5%8C%96%E6%8A%80%E6%9C%AF/%E6%A1%A5%E6%8E%A5%E7%BD%91%E7%BB%9C%E6%8B%93%E6%89%91.png" style="zoom:80%;" />
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可以为网卡添加网络接口
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```bash
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[root@localhost ~]# brctl delif virbr0 vnet0
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[root@localhost ~]# brctl addif virbr0 vnet0
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```
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## 配置桥接网络
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在宿主机上
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在宿主机上，桥接自动获取IP地址
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- 新建桥接网卡配置文件
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- 注意，物理网卡在这样操作后，ens160就会被挂到br0桥下，原本ens160的IP地址会丢失，br0桥的虚拟接口会获得原本的IP。
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```bash
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[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-br0
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TYPE=Bridge
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NAME=br0
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DEVICE=br0
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ONBOOT="yes"
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BOOTPROTO=dhcp
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nmcli connection add type bridge ifname br0 con-name br0
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nmcli connection modify br0 ipv4.method auto ipv6.method ignore
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nmcli connection add type ethernet ifname ens160 con-name br0-slave-ens160 master br0
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nmcli connection modify ens160 connection.autoconnect no
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nmcli connection modify br0-slave-ens160 no
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nmcli connection down ens160
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nmcli connection up br0
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nmcli connection up br0-slave-ens160
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```
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- 修改宿主机网卡配置文件
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- 检查配置，如果虚拟机网卡没有挂到br0下，可以手动操作
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- 删除原本virbr0桥上的vnet0网卡`brctl delif virbr0 vnet0` , 加到br0的网桥上`brctl addif virbr0 vnet0`
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```bash
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[root@localhost ~]# cp /etc/sysconfig/network-scripts/ifcfg-ens33{,.old}
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[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
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DEVICE="ens33"
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ONBOOT="yes"
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BRIDGE=br0
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[root@localhost ~]# brctl show
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bridge name bridge id STP enabled interfaces
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br0 8000.000c292e48c6 yes ens160
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vnet3
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docker0 8000.22698a118ebc no
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virbr0 8000.525400b17117 yes vnet2
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```
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- 重启`libvirtd`和`network`服务
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```bash
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[root@localhost ~]# systemctl restart network libvirtd
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```
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- 修改虚拟机配置，然后启动虚拟机检查网络是否生效
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@@ -882,13 +894,14 @@ BRIDGE=br0
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- 修改正常网卡的配置文件
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```
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cd /etc/sysconfig/network-scripts/
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rm -rf ifcfg-br0
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rm -rf ifcfg-ens33
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mv ifcfg-ens33.old ifcfg-ens33
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```
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nmcli connection down br0-slave-ens160
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nmcli connection down br0
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nmcli connection delete br0-slave-ens160
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nmcli connection delete br0
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- 重启系统
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nmcli connection modify ens160 connection.autoconnect yes
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nmcli connection up ens160
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```
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## 配置NAT网络
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