1、安裝guestfish

yum install libguestfs-tools

註意，如果要修改windows鏡像需要安裝

yum install libguestfs-winsupport

2、修改配置文件：/etc/libvirt/qemu.conf

user = "root"

# The group for QEMU processes run by the system instance. It can be
# specified in a similar way to user.
group = "root"

將user和group前面的#號放開

然後重啟：

systemctl start libvirtd

3、修改文件內容

以下示例是將鏡像裏面的/opt/scalarizr/embedded/lib/python2.7/site-packages/scalarizr-3.3.4-py2.7.egg/scalarizr/storage2/volumes/cinder.py

的233行裏面的display_description改成description

guestfish -a redhat6.7-kvm-oracle11g-22disk-pulsar2.2.qcow2 -i sh "sed -i ‘233s/display_description/description/‘ /opt/scalarizr/embedded/lib/python2.7/site-packages/scalarizr-3.3.4-py2.7.egg/scalarizr/storage2/volumes/cinder.py
 
"

註意，不使用-i參數的話，需要在交互shell中運行

更多guestfish用法可以參考：http://xiaoli110.blog.51cto.com/1724/1568307/

guestfish修改鏡像內容