Initial NanoMQ/EMQX configuration

[jr1221]

Changes

Adds basic EMQX and NanoMQ conf files. Includes sqlite backup on TPU, bridging with the IP addresses of TPU and base station, etc. Does not include acl. Also does not include way for one to subscribe to # on EMQX, that can be added later as part of emqx acl.

Nanomq remains masked at startup.

Notes

Below summary of nanomq issues and possible resolutions:

• Sqlite persistence failure (workaround applied in PR: optimziations disabled)
• [NanoMQ] - NanoMQ dies when detached #78 (workaround applied in prev. PR: assign nanomq PID with start-stop-daemon)
• [NanoMQ] - NanoMQ dies on boot when hostapd is present #79 (caused by hostapd, more investigation needed)**
• Nanomq dies when bridge not up (no workaround, fixed upstream and awaiting release)
• EMQX soft crashes when MQTTX is used to susbcribe to the same topic from both sides of the bridge (no workaround, issue not a big deal)

Test Cases

• Send any topic from nanomq to emqx
• Observe messages sent over bridge
• Observe sqlite db logging all messages

Checklist

It can be helpful to check the Checks and Files changed tabs.
Please reach out to your Project Lead if anything is unclear.
Please request reviewers and ping on slack only after you've gone through this whole checklist.

• All commits are tagged with the ticket number
• No merge conflicts
• [n/a] All checks passing
• Remove any non-applicable sections of this template
• Assign the PR to yourself
• Request reviewers & ping on Slack
• PR is linked to the ticket (fill in the closes line below)

Closes #76

[nwdepatie]

I think I'm gonna trust you on this config lol, seems to pass the sniff test for what we want. We might want to play around with things like the number of threads and such potentially but we can get to that later during testing.

[nwdepatie]

What is this for? Aren't we just going to deploy using the web deployment interface?

[jr1221]

I didn't use the web interface simply bc then I knew exactly what command line parameters were being included. I can try this out with the web interface it is just a matter of copying the various settings over. However we still need to clone the repo.