Azure App Service : Automate VNET Re-sync in case of failure
Use Case
Azure App Service is associated with a Virtual Network using the point-to-site connection and accessing resources which are present inside that Virtual Network. Sometimes due to x reason, the Virtual Network connection is getting disconnected and causing downtime in the application. However, the issue can be resolved by re-syncing the VNET.
Now, you want an automated way which can detect this situation and automatically perform a re-sync operation on VNET.
PowerShell to re-sync VNET
Re-sync VNET using WebJobs
To perform Sync operation on Virtual Network using WebJobs, you need a way to silently authenticate (Without any login prompt). Please follow the link below for information about silent authentication:
Once we have the Service Principal Id, Tenant Id, Subscription Id and Password values using the output of the previous step. Create a scheduled web job and Add PowerShell script which will ping the application URL and will perform VNET re-sync if there is a failure:
Note: Azure Automation Runbooks can also be used to automate this process.