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BUDHADITYABANERJEE-3541 asked BUDHADITYABANERJEE-3541 commented

Load Balancing On Premises VMs into Azure

We do have a Site to site VPN configured from Azure to On Premises and we do have around 20 applications hosted in 20VMs. We now want to create Azure as the secondary passive site and host 20VMs which will be the replica of the On Prem VMs so that Azure VMs can take over the load if the on prem is down. Can we achieve the same via Azure load Balancer or Azure Traffic manager and if somebody can inform how can we securely and cost effectively achieve this.

azure-vpn-gatewayazure-load-balancer
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ManuPhilip answered BUDHADITYABANERJEE-3541 commented
  • Azure Load Balancer can be only used for load balancing Azure VMs in same availability set (Same azure region) within Azure and can't be used to server on premises servers

  • DNS based load balancer like Traffic Manager can be used as an alternative. Traffic Manager endpoint can be any internet facing service hosted inside or outside of Azure. Reference: traffic-manager-faqs

  • Another option is Azure Application Gateway solution that can be served regardless of the region/on-premises. As long as you have IP connectivity, Application Gateway can communicate with instances outside of the virtual network that it's in. Application Gateway can also communicate with instances outside of the subscription it's in. Reference: application-gateway-faq




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Hello Manu,

Thanks a lot for the detailed explanation. Application gateway as far as i know works with the configured Region and can get extended to another Azure regional vnet if both the VNETs are added to vNet peering.

As we will have an on prem to Azure Application Load-balancing 7strategy, will we be able to user Application Gateway or Traffic Manager is the only solution. Also

Frontdoor can be another option but as my on prem VM is private in nature hence i guess we will not be able to integrate FD as a solution.

Please suggest.

Thanks
Aditya.

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