This project demonstrates a way to sync a Redis Enterprise Cache between 2 locations. The code included is meant to illustrate the process for demo purposes, but the concepts could be extended to a production use case.

• Bicep : A tool used to create infrastructure templates for standarized deployments
• Azure Functions : A serverless runtime environment for on-demand code, supporting multiple languages and environment
• PowerShell Fn : We chose PowerShell because there's existing commandlets for exporting and importing from Azure Redis

1. Define an infrastructure for our code to run, this includes the following, see main.bicep and substitute your appName value. For purposes of illustration I used bnkredispoc

   • SRC Cluster : Source Cluster
   • DR Cluster : Disaster Recovery cluster
   • SRC Azure Storage : Storage in the source region
   • DR Azure Storage : Storage in DR region
   • App Svc Hosting Plan : Hosting plan for function
   • Function App : Container for the functions to do the sync
   • App Insights : Monitoring of the function

   

2. Add function App fnAppRedisSyncPS to perform extract, copy the data, and import the data

   • fnHttpRedisExportPS : Exports the cache when triggered by HTTP call
   • fnBlobCopySrcToDest : Uses blob trigger and bindings to copy blob from source to dest
   • fnBlobRedisImport : Imports the blob into the cache when it arrives

3. Deploy Infrastructure from ./deploy folder

   • az deployment group create --name [name] --resource-group [rg-redis-poc] --template-file main.bicep

4. Deploy Code from ./fnAppRedisSyncPS folder

   • func azure functionapp publish [bnkredispoc-fn]

5. In the Azure portal enable system managed identity by going to the app settings and turning on the setting. Also add an RBAC role assignment to the service to grant access at the Resource Group scope. then click on Azure Role Assignments and add role

• DOCS: Import-AzRedisEnterpriseCache
• DOCS: New-AzStorageContainerSASToken
• DOCS: Azure Blob storage trigger for Azure Functions
• DOCS: Quickstart - Create Az Fn from ARM
• SO: Https Call from Az Fn
• DOCS: Managed Service Identities for Fn