REVISED: Add Node-RED and Mosquitto (MQTT) IIAB playbooks for IoT

[m-anish]

This is the updated and fixed PR for #854

[holta]

@tim-moody asked us to change the way default_vars.yml works: #1352

So now default_vars.yml is equivalent to MIN-sized, with most all apps/services set not to install or be enabled.

Can you revise this PR's default_vars.yml as such?

[m-anish]

@tim-moody asked us to change the way default_vars.ymk works: #1352

So now default_vars.yml is equivalent to MIN-sized, with most all apps/services set not to install or be enabled.

Can you revise this PR's default_vars.yml as such?

Done! Thanks for pointing it out.

[m-anish]

PLEASE READ THIS BEFORE MERGING

Test on the following environments:

• Debian
• Raspberry pi
• Test first with all flags nodered_install, nodered_enabled, mosquitto_install, mosquitto_enabled set to False
• Then test by enabling them all and rerunning the install

Thanks!

[m-anish]

Alert! NOTE! node-red fails on 9.6!!

1. the install proceeds smoothly
2. but node red install in a directory other than where the systemd service is expecting it to
3. i will make a fix
4. so, the testing must involve actually opening <box_ip>:1880
5. and enter the following creds Admin:g0adm1n

[m-anish]

This now works on Debian 9.6(VM), and Ubuntu 18.04(VM)

[m-anish]

This works on Debian 10(VM) as well, after applying the fixes described in #1387

[holta]

Successfully tested http://box:1880 (Node-RED's console) with both http://LAN-ip:1880 & http://WAN-ip:1880 on these 3 OS's:

• Raspbian Lite on RPi 3 B+
• Ubuntu Desktop 16.04 on NUC
• Ubuntu Server 18.04 on NUC

PS the key was adding daemon-reload: True to Ansible's systemd calls, and making sure ./iiab-network has indeed run.