vm 复制虚拟机，KVM虚拟机复制实战攻略，轻松实现虚拟机迁移与备份

本文详细介绍了VM复制虚拟机，特别是KVM虚拟机的复制实战攻略，帮助读者轻松实现虚拟机迁移与备份，提高系统稳定性和数据安全性。

随着云计算技术的不断发展，虚拟化技术在企业中的应用越来越广泛，KVM作为Linux下的一种开源虚拟化技术，因其高效、稳定、免费等优势，备受用户青睐，在实际应用中，我们常常需要将虚拟机从一个物理服务器迁移到另一个物理服务器，或者进行虚拟机的备份，本文将详细讲解如何使用kvm虚拟机复制功能，实现虚拟机的迁移与备份。

KVM虚拟机复制原理

KVM虚拟机复制主要分为两种方式：快照复制和迁移复制。

1、快照复制：在源虚拟机上创建快照，然后将快照复制到目标虚拟机，实现虚拟机的备份，这种方式不会对源虚拟机产生任何影响，但复制过程中源虚拟机无法运行。

2、迁移复制：将源虚拟机的运行状态实时复制到目标虚拟机，实现虚拟机的迁移，这种方式需要源虚拟机在迁移过程中暂停运行，对业务有一定影响。

KVM虚拟机复制步骤

以下以快照复制为例，讲解KVM虚拟机复制的具体步骤：

1、确保源虚拟机和目标虚拟机的KVM版本一致。

2、在源虚拟机上创建快照：

qemu-img snapshot-create myvm myvm-snapshot

3、将快照复制到目标虚拟机：

qemu-img snapshot-create myvm myvm-snapshot
qemu-img convert -f qcow2 -O qcow2 myvm-snapshot myvm-snapshot-copy
scp myvm-snapshot-copy root@target-server:/path/to/myvm-snapshot-copy

4、在目标虚拟机上导入快照：

qemu-img snapshot-load myvm myvm-snapshot

5、启动目标虚拟机：

virsh start myvm

6、检查目标虚拟机状态，确保虚拟机已成功复制。

KVM虚拟机迁移复制

以下以迁移复制为例，讲解KVM虚拟机迁移的具体步骤：

1、在源虚拟机上创建迁移文件：

virt-install --name myvm --ram 2048 --vcpus 1 --disk path=/var/lib/libvirt/images/myvm.qcow2,size=20 --os-type linux --os-variant fedora26 --graphics none --console pty,target_type=serial --console pty,target_type=serial --noautoconsole --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial --console pty,target_type=serial 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