Deploying a Highly Available Web App in Microsoft Azure

After confirming both my Production and DR apps were running, I provisioned and deployed a Traffic Manager resource in South Central US and housed it in my Tertiary Resource Group.  During provisioning, I configured my WebAppProd and WebAppDR apps as endpoints.  WebAppProd was given a priority of 100 and WebAppDR a priority of 200.

I named the Traffic Manager Resource and configured it for "Priority Mode" so it would always send traffic to my production app unless the production app went down.  I also set the DNS TTL value to 2 minutes so if there was a failure, it would only take two minutes or so for the DNS name to be re-requested and updated to reflect the DR app.

To test basic functionality, I connected to my production database with SQL Server Management Studio and created a small table.  After creating the table, I wrote a small .php script to read from the table that I created and uploaded the script to my production web app via FTP.  I created a similar script for my DR app but configured it to read from my DR database.  Once both scripts were uploaded, I simply browsed to them with Google Chrome to ensure the read was successful in both production and DR.

NOTE:  I had to add my laptop's public IP address to the firewall rules for both database servers before I could connect to them with SQL Server Management Studio.

With everything in place as far as functionality and DR went, I registered, assigned it to my Traffic Manager, and updated my DNS so my users could access the website using my custome domain name.

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Thomas Mitchell

Tom is a 20+ year veteran of the IT industry and carries numerous Microsoft certifications, including the MCSE: Cloud Platform and Infrastructure certification. A Subject Matter Expert in Active Directory and Microsoft Exchange, Tom also possesses expert-level knowledge in several other IT disciplines, including Azure, Storage, and O365/Exchange Online. You can find Tom at his website, on LinkedIn, or on Facebook. Need to reach him by phone? Call 484-334-2790.