KVM 维护常用命令
创建虚拟机
# 创建目录
cd /data/vm/
# 创建虚机文件夹 155 表示IP为x.x.x.155的 主机目录
mkdir /data/vm/CentOS7-155
# 复制出是镜像
cp ../images/centos7.qcow2 /data/vm/CentOS7-155
opt_ip=155
# 内存大小MB
opt_memory=4096
# cpu 4核
opt_cpu=4
mac=55
virt-install --os-variant centos7.0 --arch=x86_64 --name CentOS7-$opt_ip --memory $opt_memory --vcpus $opt_cpu --disk path=/data/vm/CentOS7-$opt_ip/centos7.qcow2,format=qcow2,device=disk,bus=virtio --network bridge=br0 --mac=52:54:00:82:9e:$mac --boot hd --graphics none --accelerate --force --autostart --import --noautoconsole虚拟机维护
# 查看虚机
virsh list
# 关闭虚机
virsh destory CentOS7-155
# 删除配置
virsh undefine CentOS7-155
# 删除数据
rm -rf /opt/data/vm/CentOS7-155
# 创建快照，快照期间虚机是paused状态，无法使用
virsh snapshot-create-as CentOS7-155 2021-09-08
# 查看快照
virsh snapshot-list CentOS7-155
# 还原快照
virsh snapshot-revert CentOS7-155 2021-09-08
# 删除快照
virsh snapshot-delete CentOS7-155 2021-09-08
# 磁盘扩容，要先停机
qemu-img resize /data/vm/CentOS7-$opt_ip/centos7.qcow2 +50G
qemu-img check /data/vm/CentOS7-$opt_ip/centos7.qcow2virsh快照相关命令汇总
Domain Management (help keyword 'domain'):
restore restore a domain from a saved state in a file
save save a domain state to a file
save-image-define redefine the XML for a domain's saved state file
save-image-dumpxml saved state domain information in XML
save-image-edit edit XML for a domain's saved state file
managedsave managed save of a domain state
managedsave-remove Remove managed save of a domain
managedsave-edit edit XML for a domain's managed save state file
managedsave-dumpxml Domain information of managed save state file in XML
managedsave-define redefine the XML for a domain's managed save state file
Snapshot (help keyword 'snapshot'):
snapshot-create Create a snapshot from XML
snapshot-create-as Create a snapshot from a set of args
snapshot-current Get or set the current snapshot
snapshot-delete Delete a domain snapshot
snapshot-dumpxml Dump XML for a domain snapshot
snapshot-edit edit XML for a snapshot
snapshot-info snapshot information
snapshot-list List snapshots for a domain
snapshot-parent Get the name of the parent of a snapshot
snapshot-revert Revert a domain to a snapshot