Cross-Cloud Services Demo

This demo leverages services of two clouds (Azure and AWS) and leverages Dispatch as the glue between them.

Goal

Azure Blob Storage -> Eventgrid -> Dispatch -> AWS Rekognition -> Slack

Install the Azure Event Driver

dispatch create -f eventdriver.yaml

Create Azure Storage Bucket

Links:

• https://docs.microsoft.com/en-us/azure/event-grid/manage-event-delivery
• https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-event-quickstart?toc=%2fazure%2fevent-grid%2ftoc.json

1. Create a container in Azure Blob Storage
2. Create an event subscription forwarding the event to the event driver URL
   • ensure cloudevent schema

Add secrets

1. Add Azure storage credentials:

   {
       "azure_account_name": "...",
       "azure_account_key": "...",
       "azure_public_container": "..."
   }

   dispatch create secret azure-storage azure-secrets.json
2. Add Slack webhook url:

   {
       "webhook-url": "https://hooks.slack.com/services/..."
   }

   dispatch create secret slack slack-secrets.json

Create the rekognition service

1. Create the recognition service instance: dispatch create -f rekognition.yaml

Run the demo

1. Create the eventgrid driver type and driver: dispatch create -f eventdriver.yaml
2. Create the eventgrid subcription pushing to Dispatch:
   • Open Azure portal
   • Create the subscription emitting cloudevents
3. Show contents of label.py function highlighting dependencies, secret injection and service injection.
4. Create the image with required dependencies: dispatch create -f image.yaml
5. Create the label function: dispatch create -f function.yaml
6. Subscribe the label function to the azure event: dispatch create -f subscription.yaml
7. Upload pic to label: az storage blob upload --file hotdog.png --container-name dispatchcontainer --name hotdog.png