Linux Cache

查看客户机列表
[ops@localhost ~]$ sudo virsh list --all
 Id   Name              State
----------------------------------
 39   windows04         running
 52   windows05         running
 53   fileserver01      running
 65   windows03         running
 79   windows-desktop   running
 80   windows02         running
 -    ubuntu            shut off
 -    windows01         shut off
 -    windows06         shut off

[ops@localhost ~]$


查看指定vm的块设备列表
[ops@localhost ~]$ sudo virsh domblklist ubuntu
 Target   Source
-------------------------------------------------
 vda      /var/lib/libvirt/images/ubuntu.qcow2
 sda      -

[ops@localhost ~]$


查看磁盘信息
[ops@localhost ~]$ sudo qemu-img info /var/lib/libvirt/images/ubuntu.qcow2
image: /var/lib/libvirt/images/ubuntu.qcow2
file format: qcow2
virtual size: 100 GiB (107374182400 bytes)
disk size: 68.5 GiB
cluster_size: 65536
Format specific information:
    compat: 1.1
    compression type: zlib
    lazy refcounts: true
    refcount bits: 16
    corrupt: false
    extended l2: false
Child node '/file':
    filename: /var/lib/libvirt/images/ubuntu.qcow2
    protocol type: file
    file length: 100 GiB (107390828544 bytes)
    disk size: 68.5 GiB
    Format specific information:
        extent size hint: 1048576
[ops@localhost ~]$


块设备容量调整命令参数
[ops@localhost ~]$ sudo virsh blockresize --help
  NAME
    blockresize - Resize block device of domain.

  SYNOPSIS
    blockresize <domain> <path> <size>

  DESCRIPTION
    Resize block device of domain.

  OPTIONS
    [--domain] <string>  domain name, id or uuid
    [--path] <string>  Fully-qualified path of block device
    [--size] <number>  New size of the block device, as scaled integer (default KiB)


[ops@localhost ~]$

必须在启动状态下执行命令
[ops@localhost ~]$ sudo virsh blockresize ubuntu /var/lib/libvirt/images/ubuntu.qcow2 200G
error: Failed to resize block device '/var/lib/libvirt/images/ubuntu.qcow2'
error: Requested operation is not valid: domain is not running

[ops@localhost ~]$


启动服务并执行命令
[ops@localhost ~]$ sudo virsh start ubuntu
Domain 'ubuntu' started

[ops@localhost ~]$ sudo virsh blockresize ubuntu /var/lib/libvirt/images/ubuntu.qcow2 200G
Block device '/var/lib/libvirt/images/ubuntu.qcow2' is resized
[ops@localhost ~]$ 

重新查看磁盘信息
[ops@localhost ~]$ sudo qemu-img info /var/lib/libvirt/images/ubuntu.qcow2
image: /var/lib/libvirt/images/ubuntu.qcow2
file format: qcow2
virtual size: 200 GiB (214748364800 bytes)
disk size: 68.5 GiB
cluster_size: 65536
cleanly shut down: no
Format specific information:
    compat: 1.1
    compression type: zlib
    lazy refcounts: true
    refcount bits: 16
    corrupt: false
    extended l2: false
Child node '/file':
    filename: /var/lib/libvirt/images/ubuntu.qcow2
    protocol type: file
    file length: 100 GiB (107390828544 bytes)
    disk size: 68.5 GiB
    Format specific information:
        extent size hint: 1048576
[ops@localhost ~]$