cloud image root password 설정

1. CentOS7 qcow2 다운로드

# wget https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-2009.qcow2

2. libguestfs-tools 패키지 설치

# yum install libguestfs-tools -y

3. root 패스워드 변경

# virt-customize -a CentOS-7-x86_64-GenericCloud-2009.qcow2 --root-password password:1234
[   0.0] Examining the guest ...
[  28.4] Setting a random seed
[  28.5] Setting passwords
[  30.0] Finishing off