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How can i get a notification that a deployment has completed on greengrass device

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I'd like to be able to get a notification in a greengrass component that a deployment version has been updated or revised - how might this be possible ?

Topics
Internet of Things (IoT)
Tags
AWS IoT Greengrass
Language
English
majh
asked 12 days ago63 views
2 Answers
0
Accepted Answer

Hi majh. I'm not clear what event you want to capture, but individual components can use this API to be notified about changes coming in a deployment: https://docs.aws.amazon.com/greengrass/v2/developerguide/ipc-component-lifecycle.html#ipc-operation-subscribetocomponentupdates

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EXPERT
Greg_B
answered 12 days ago
  • majh
    12 days ago

    Hi Greg - basically what I want to do is:

    • Query on the device what greengrass deployment (or deployments) are currently running.
    • So ideally I would be able to query some type of deployment status - rather than individual component status. Is something like this possible ?
    • Also would be good to be able to subscribe to some sort of status event, to get updates about deployments changing etc, so polling isn't necessary.
  • Greg_B EXPERT
    11 days ago

    These are all the available event streams: https://docs.aws.amazon.com/greengrass/v2/developerguide/interprocess-communication.html#ipc-subscribe-operations. The events from SubscribeToComponentUpdates gives you the deployment ID. You could use HARD dependencies to make one of your components always be the last to be processed in a deployment. So it could be a proxy for the whole deployment.

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Hi,

Here is the documentation explaining how you can configure notifications using AWS event bridge and Amazon SNS: https://docs.aws.amazon.com/greengrass/v2/developerguide/deployment-health-notifications.html

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Sivaraman Selvam
answered 12 days ago
  • majh
    12 days ago

    Thanks for your response - but isn't this calling a backend API ? Isn't there any device side mechanism to get such notifications ?

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