Package itamae-1.9.6-1.el7.x86_64.rpm is not signed

[sue445]

I want to install omnibus-itamae to CentOS, but error is error is occurred

[vagrant@localhost tmp]$ sudo yum install -y itamae

Package itamae-1.9.6-1.el7.x86_64.rpm is not signed
[vagrant@localhost tmp]$ echo $?
1

Detail error log

https://gist.github.com/sue445/a63fa9bde3dfa6ce2e1b7b0c796a739e

Environment

• OS: CentOS Linux release 7.2.1511
• VirtualBox, AWS, IDCF

Workaround

I add --nogpgcheck, install successful

[centos@ip-10-130-123-162 tmp]$ sudo yum install -y itamae --nogpgcheck


Installed:
  itamae.x86_64 0:1.9.6-1.el7

Complete!
[centos@ip-10-130-123-162 tmp]$