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AWS Green Grass Moquette broker for inter process communication

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Hi, Is it possible to use, Green Grass Moquette broker (pubic green grass component) for interaction over MQTT between custom components running in the same core device ? ie. Moquette broker and the custom gg components all run in the same core device.

If yes, how to properly configure it with SSL certificates?

Currently I'm using IPC pub/sub for interaction between custom components within core device, but seeing limitations, not able to "retain" messages like standard MQTT. Plus there's no "QoS" in IPC Pub/Sub - does it matter ?

Thanks,

Topics
Internet of Things (IoT)
Tags
AWS IoT CoreAWS IoT Greengrass
Language
English

asked 2 years ago167 views

1 Answer
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Hello, if you wish to use the Moquette broker to communicate between components, then each component would need a certificate in order to communicate with the broker. Although this is possible, it is recommended to use local pub/sub through Greengrass IPC to communicate between components. Since IPC does not support sending retained MQTT messages, I recommend taking a look at using local shadows.

AWS

answered 2 years ago

AWS
EXPERT

reviewed 2 years ago

  • Chan
    2 years ago

    Thanks for the response, may I know why is IPC Pub/Sub preferred/recommended over Moquette broker for internal communication ?

  • Greg EXPERT
    2 years ago

    Greengrass components are already authenticated, and hence can use IPC without any SSL certificate stuff. QoS isn't needed because IPC messages between components don't leave the device. It's not wrong to use an MQTT broker though, it's just more work. You can use the client devices feature to authenticate the MQTT clients. It's even possible to deploy an MQTT broker without TLS.

  • Chan
    2 years ago

    @Greg_B Thanks for the explanation, also from performance stand point, is IPC better than Moquette - are there any bench mark stats to show it?

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