FYI One liner sed to fix any CentOS7 VPS yum updates

[hecatae]

The below line updates CentOS7 Repos to Vault:

sed -i -e '/^mirrorlist/d;/^#baseurl=/{s,^#,,;s,/mirror,/vault,;}' /etc/yum.repos.d/CentOS*.repo

Not that I'm suggesting you should still be using CentOS7 but it's worth having around.
Found over here: https://jms1.info/linux/centos7-vault.html

 

[hecatae]

backups of repos

The below is needed for the fusionpbx centos 7 install

yum-config-manager --add-repo http://repos.ecs.tuwien.ac.at/public/el7/x86_64/cert-forensics/
yum-config-manager --add-repo https://mirrors.vcea.wsu.edu/centos-vault/epel-7/x86_64/
yum-config-manager --add-repo http://repos.ecs.tuwien.ac.at/public/el7/x86_64/postgresql/

wander into resources/fusionpbx.sh and postgresql.sh and remove the forensic repo and the postgresql repo