使用 KVM 时，系统盘竟然做小了，无奈！扩容一下吧。

查看原qcow2大小

[root@xiexianbin_cn ~]# ll
total 204
-rw-r--r--. 1 root root 197120 Nov  4 22:02 centos.qcow2
[root@xiexianbin_cn ~]# qemu-img info centos.qcow2 
image: centos.qcow2
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: 196K
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false

扩展磁盘

[root@xiexianbin_cn ~]# qemu-img resize centos.qcow2 +9G
Image resized.

查看扩容后的qcow2文件

[root@xiexianbin_cn ~]# qemu-img info centos.qcow2 
image: centos.qcow2
file format: qcow2
virtual size: 10G (10737418240 bytes)
disk size: 260K
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
[root@xiexianbin_cn ~]#