When trying to diagnose network issues it can be nice to have some graphs to show latency over time. Originally I wanted to use Cacti, but that turned out to be a bit overkill for my needs, and the guides I could find had a pretty steep learning curve.
Deploy Centos7 template
Install packages from repo and enable
yum install smokeping sendmail perl perl-CGI -y systemctl enable httpd ; systemctl enable httpd systemctl enable smokeping ; systemctl enable smokeping
Append to /etc/httpd/conf/httpd.conf (99% sure this is needed)
LoadModule cgi_module modules/mod_cgi.so
Edit /etc/smokeping/config and set the following in the General section:
owner = YOUR NAME contact = YOUR EMAIL mailhost = localhost sendmail = /sbin/sendmail
In the Alterts section, set the "to" address to where you want warnings sent to, and "from" to the sender address you want to use.
In the Database section, adjust the steps/pings to how many pings per how many seconds. I've set 60/60 which may be way overkill.
Open http firewall port:
firewall-cmd --zone=public --add-port=80/tcp --permanent firewall-cmd --reload
Configure smokeping to allow access from other hosts by editing /etc/httpd/conf.d/smokeping.conf
Comment out "Require local" in both places and replace with "Require all granted" or a more narrow restriction if you prefer.
systemctl restart httpd
Test if webinterface works - open http://hostname/smokeping/sm.cgi . It should look something like this:
Basically just edit /etc/smokeping/config and go to the Targets section and copy the syntax.
Restart the smokeping service after changes, and wait a few minutes for some data to be generated.
systemctl restart smokeping