Build scripts (and/or just a user guide) for demo of Ansible + Blinksticks

[geerlingguy]

From #112, I've broken out this issue:

• [x] Build a few scripts that allow easy remote control of LEDs (for use with demoing Ansible ad-hoc/playbook orchestration).

Basically, I want to be able to do some slick things in a demo like:

1. Stop the dramble-node-monitor service so the LEDs go off and the Pis are not monitoring node status anymore.
2. Turn the blinkstick blue, using serial=1
3. Turn the blinkstick green, using serial=2
4. Turn the blinkstick off, with no serial (so all at once)

It would also be sorta cool if I built a sidecar pod to the Drupal pod that would flash the blinkstick any time a request was made to that container (e.g. watch the Apache log?)... but that would probably be something to break out into a separate feature.

I would also like to document the setup and use of blinksticks (vs soldered LED boards) in the Dramble Wiki.

[geerlingguy]

See: https://github.com/geerlingguy/raspberry-pi-dramble/blob/master/testing/presentation/SCRIPT.md

1. ansible -i inventory all -m service -a "name=dramble-node-monitor state=stopped" -b
2. ansible -i inventory all -a "blinkstick blue" -b
3. ansible -i inventory all -a "blinkstick green" -b
4. ansible -i inventory all -a "blinkstick blue" -b --forks 1
5. ansible -i inventory all -a "blinkstick red" -b --forks 1
6. ansible -i inventory all -m service -a "name=dramble-node-monitor state=started" -b

[SamTheFishy]

Thanks very useful.