[LINUX] NBD socket setting failed when mounting image

Event

A message is output stating that the NBD socket setting failed when mounting the image.

[root@XXXX ~]# sudo qemu-nbd -c /dev/sda2 CentOS-7-XXXXXXX.qcow2
qemu-nbd: Failed to set NBD socket
qemu-nbd: Disconnect client, due to: Failed to read request: Unexpected end-of-file before all bytes were read
[root@XXXX ~]# 

Cause

Kernel module needs to be loaded before mounting the image.

• Reference URL ↓ https://docs.openstack.org/ja/image-guide/modify-images.html

solution

Load the module with the following command

[root@XXXX ~]# modprobe nbd max_part=16