On-Premises Disaster Site Recovery Strategy with Azure VM
Site Recovery is very critical now a days. In your own Data-center or Server disasters can happen and you must secure your site to recover from them. Use Microsoft Azure to secure you on-premises machine today. Learn the failover and failback stages in Site Recovery on Azure. Learn Business Continuity and Disaster Recovery (BCDR) strategy in Azure.
Setup On-Premises Replication to Azure VM
Before even failover to Azure VM from on-premises machine make sure you have setup your replication to Azure VM.
Stages for On-Premises Disaster Recovery
After replication is setup to Azure VM follow this workflow to accomplish Site Recovery in 4 steps.
On-Premises Failover and failback four stages
Let’s learn all the 4 steps required for site recovery.
Stage 1: Fail over from on-premises
After setting up replication to Azure for on-premises machines, when your on-premises site goes down, you fail those machines over to Azure. After failover, Azure VMs are created from replicated data.
🛎️ Important action checklist table below to be followed before & after failover. Read them carefully.
| Target Failover OS | Stage | Location to perform Actions | Actions |
|---|---|---|---|
 Windows Azure VM |
Before Failover | On the On-Premise Machine | For Internet Access: make sure RDP is allowed for All Profiles, For site-to-site VPN access: make sure RDP is allowed for Domain and Private network. Make sure SAN ( Storage Area Network) policy is set to Online and There is no windows update pending on the VM. |
| Windows Azure VM |
After Failover | On the Azure Virtual Machine | Add a public IP address, must allow incoming connections to the RDP port. |
 Linux Azure VM |
Before Failover | On the On-Premise Machine | Ensure that the Secure Shell Service on the VM is set to start automatically on system boot. Check that firewall rules allow an SSH connection to it. |
| Linux Azure VM |
After Failover | On the Azure Virtual Machine | Add a public IP address, Need to allow incoming connections to the SSH port. |
Stage 2: Reprotect Azure VMs
In Azure, you reprotect the Azure VMs so that they start replicating back to the on-premises site. The on-premises VM (if available) is turned off during reprotection, to help ensure data consistency.
Stage 3: Fail over from Azure
When your on-premises site is running as normal again, you run another failover, this time to fail back Azure VMs to your on-premises site. You can fail back to the original location from which you failed over, or to an alternate location.
Stage 4: Reprotect on-premises machines
After failing back, again enable replication of the on-premises machines to Azure.
Overall Replication Steps Model Diagram
Learn more about BCDR strategy in Azure here.
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