I had suspected that the fastest way to build this was to use node red, at least I know that shutdown and reboot are easily implemented. The issue is Mac and Ubuntu computers. I don't think that I will need to consider PCs (except for the Atom HA-IOT Server which runs Ubuntu). I got the initial sequence done in node red, however I have not set it up yet to do an actual shutdown/restart - still figuring out the MQTT messages to use. I decided on the following messages
- relay/strikedown along with relay/strikedown_answer
- reboot: 0/1, name: IP1, ping: 0/1
- if reboot is 0 then does a shutdown
- if reboot is 1 then does a restart
- if ping is 1 then starts ping message sequence (5 times with 2 sec in between)
- note when ping is 1, upon restart the ping sequence will start up
- relay/myping
- name: IP1, ping: 0/1
- if ping is 1 then starts ping message sequence (5 times with 2 sec in between)
- if ping is 0 then stops ping
- note when ping is 1, upon restart the ping sequence will start up
- relay/ping
- name: IP1
strikedown, the Docker container in node red, will always use port 1885 on each host. That way, I will be able to get to the node red invocation to make changes. For strikedown on Raspberry Pi, theer is a node red contrib library that does both functions. For the one on Ubuntu servers it will have to be made specific to the server. I am thinking of using Python since there is a Python function node in the contrib library.
The strikedown node red sequence is in two parts, the startup and the strikedown sequence. The startup sequence is:
Update: I have since discovered that the Shutdown and Restart Nodes in this sequence do not work under a Docker Container running on RPi. So I will have to figure out how to accomplish the task in another way.
