Option 1: Install pmtr from repo (quick way)

This site (packagecloud.io) has a script that you can run to install the pmtr repository.

INSTALLER=https://packagecloud.io/install/repositories/troydhanson/pmtr/script.rpm.sh

Install using:

curl -s  $INSTALLER | sudo bash

The new repo now appears in /etc/yum.repos.d, and in sudo yum repolist. Finally, install pmtr, set it up to run at boot and start it:

sudo yum install pmtr
sudo systemctl daemon-reload
sudo systemctl enable pmtr
sudo systemctl start pmtr

You are done. You can verify it's running by:

sudo systemctl status pmtr

You can go on to edit its configuration file /etc/pmtr.conf from here.

Option 2: Install pmtr from rpm (manual way)

Import packager's public key:

wget https://troydhanson.github.io/RPM-GPG-KEY-troydhanson
sudo rpm --import RPM-GPG-KEY-troydhanson

Download RPM:

VERSION=17.11.2-1
RPM=pmtr-$VERSION.el7.x86_64.rpm
URL=https://packagecloud.io/troydhanson/pmtr/packages/el/7/$RPM/download.rpm
wget --content-disposition $URL

Verify signature:

rpm -K pmtr-$VERSION.el7.x86_64.rpm

Install and start service:

sudo yum -y install pmtr-$VERSION.el7.x86_64.rpm
sudo systemctl daemon-reload
sudo systemctl enable pmtr
sudo systemctl start pmtr