• kvm快照


    Kvm快照:

    1、基于lvm的快照

    2、kvm自带的快照功能(需要qcow2 磁盘文件才支持快照)

    关闭kvm虚拟机:

    查看磁盘文件信息:

    [root@super67 ~]# qemu-img info /var/lib/libvirt/images/ubuntu16-1.img

    image: /var/lib/libvirt/images/ubuntu16-1.img

    file format: raw

    virtual size: 0 (0 bytes)

    disk size: 0

    磁盘格式转换:

    [root@super67 ~]# qemu-img convert -f raw -O qcow2 /var/lib/libvirt/images/ubuntu16-1.img /var/lib/libvirt/images/ubuntu16-1.qcow2

    查看:

    [root@super67 ~]# ll /var/lib/libvirt/images

    -rw-r--r-- 1 qemu qemu 1485881344 Sep  4 12:47 ubuntu-16.04-desktop-amd64.iso

    -rwxr-xr-x 1 root root        107 Sep  4 13:58 ubuntu16-1.img

    -rw-r--r-- 1 root root     196608 Sep  4 14:11 ubuntu16-1.qcow2

    -rw------- 1 root root 8589934592 Sep  4 10:50 www.linux1.cn.img

    [root@super67 ~]#  qemu-img info /var/lib/libvirt/images/ubuntu16-1.qcow2

    image: /var/lib/libvirt/images/ubuntu16-1.qcow2

    file format: qcow2

    virtual size: 0 (0 bytes)

    disk size: 132K

    cluster_size: 65536

    编辑ubuntu16-1配置文件:

    [root@super67 ~]# virsh edit ubuntu16-1

    现在ubuntu16-1虚拟机已经是支持快照的虚拟机了。

    接下来进行快照:

    [root@super67 ~]# cd /var/lib/libvirt/images

    创建快照(名字为ubuntu16-1-copy)

    [root@super67 images]# virsh snapshot-create ubuntu16-1

    Domain snapshot 1472969993 created

    [root@super67 images]# virsh snapshot-create-as ubuntu16-1 ubuntu16-1-copy

    Domain snapshot ubuntu16-1-copy created

    查看快照版本:

    [root@super67 images]# virsh snapshot-list ubuntu16-1

     Name                 Creation Time             State

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

     1472969993           2016-09-04 14:19:53 +0800 shutoff

     ubuntu16-1-copy      2016-09-04 14:20:53 +0800 shutoff

    查看当前快照版本:

    [root@super67 images]# virsh snapshot-current ubuntu16-1 |grep "<name>"

      <name>ubuntu16-1-copy</name>

        <name>1472969993</name>

        <name>ubuntu16-1</name>

    再次创建快照:

    [root@super67 images]# virsh snapshot-create-as ubuntu16-1 ubuntu16-1-copy1

    Domain snapshot ubuntu16-1-copy1 created

    查看当前版本:

    [root@super67 images]# virsh snapshot-current ubuntu16-1 |grep "<name>"

      <name>ubuntu16-1-copy1</name>

        <name>ubuntu16-1-copy</name>

        <name>ubuntu16-1</name>

    恢复快照(kvm虚拟机要先关机)

    [root@super67 images]# virsh snapshot-revert ubuntu16-1 ubuntu16-1-copy

    查看版本:

    [root@super67 images]# virsh snapshot-current ubuntu16-1 |grep "<name>"

      <name>ubuntu16-1-copy</name>

        <name>1472969993</name>

        <name>ubuntu16-1</name>

    查看快照:

    [root@super67 ~]# qemu-img info /var/lib/libvirt/images/ubuntu16-1.qcow2

    image: /var/lib/libvirt/images/ubuntu16-1.qcow2

    file format: qcow2

    virtual size: 0 (0 bytes)

    disk size: 144K

    cluster_size: 65536

    Snapshot list:

    ID        TAG                 VM SIZE                DATE       VM CLOCK

    1         1472969993                0 2016-09-04 14:19:53   00:00:00.000

    2         ubuntu16-1-copy           0 2016-09-04 14:20:53   00:00:00.000

    3         ubuntu16-1-copy1          0 2016-09-04 14:25:28   00:00:00.000

    删除快照:(用TAG号删)

    [root@super67 ~]# virsh snapshot-delete ubuntu16-1 ubuntu16-1-copy1

    Domain snapshot ubuntu16-1-copy1 deleted

    查看快照:

    [root@super67 ~]# qemu-img info /var/lib/libvirt/images/ubuntu16-1.qcow2

    image: /var/lib/libvirt/images/ubuntu16-1.qcow2

    file format: qcow2

    virtual size: 0 (0 bytes)

    disk size: 144K

    cluster_size: 65536

    Snapshot list:

    ID        TAG                 VM SIZE                DATE       VM CLOCK

    1         1472969993                0 2016-09-04 14:19:53   00:00:00.000

    2         ubuntu16-1-copy           0 2016-09-04 14:20:53   00:00:00.000

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  • 原文地址:https://www.cnblogs.com/fanxuanhui-linux/p/5839263.html
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