The Nagios light-bar David Stern

What is it?

Why do we need it? DoD work requires air-gapped networks How would you know if a service is down if you’re not on the network?

The Hardware

An unobstructed View

Backside of base unit: connection to light-bar

Equipment network discovery program Initial connection requires crossover cable

Base unit generates a webpage

The Settings tab allows you to configure the device

You need to identify the type of device

Security settings

Optional settings

The network MUST be active before you power-on the unit It might be a smart idea to set the light-bar for DHCP address It would be a smart idea to monitor that the light-bar is available

If I can control the light-bar from the web, why not use WGET

The Secret Sauce; undocumented makes the light-bar go beep turns off the noise makes the green light go on turns off the green light Substitute OR for GR to affect the orange(yellow) light Substitute RE for GR to affect the red light

Getting nagios status We can get the nagios status from the Service page: Just search it for “serviceTotalsPROBLEMS” N.B. You may need to insert authentication information in URL bin/status\?host=all You can use the same format for the light-bar authentication

Mission Creep How about if we get the light-bar to beep the first time a new alert occurs? And since we don’t use nagios WARNING conditions, let’s use the yellow light to indicate unacknowledged alerts Let’s put it all together…

This is NOT a plugin

Other cool things you can do with WGET Hierarchical Nagios: A core nagios aware of other installs

What’s different on this nagios page?

Configuring “hierarchical” nagios Backup nagios before and after these changes Install a Nagios server in each lab/sub-site Edit side.{html,php}, Add stanza for each sub- site and set refresh=300, Tag each nagios sub-site: Main.{html,php} and status.c  status.cgi Modify light-bar cron job to check each sub- site, swap red,green dots as needed

One way to present the pages

Another way to present the data

The Results Faster response time/higher uptime Better awareness of our networks

Questions?