redundant IIS

AJF 1 Reputation point
2022-02-28T08:29:54.37+00:00

About IIS, lets say i got several websites at one IIS server. But this means, when the server goes down, the sites aint available.
So i think i should make them for instance redundant. But how?
Many thanks for a reply.

Internet Information Services
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  1. Sreeju Nair 11,606 Reputation points
    2022-02-28T08:51:28.633+00:00

    You can have two servers, both running IIS, and deploy your web applications in both servers. Use load balancers to route traffice between servers. Some reference articles below.

    https://learn.microsoft.com/en-us/iis/extensions/configuring-application-request-routing-arr/achieving-high-availability-and-scalability-arr-and-nlb
    https://devblogs.microsoft.com/azuregov/configuring-high-availability-for-iaas-virtual-machines/

    Hope this helps

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  2. Bruce Zhang-MSFT 3,736 Reputation points
    2022-03-01T03:27:15.467+00:00

    Hi @AJF ,

    To prevent server goes down and make IIS highly available, I would recommend you to use load balancing and create an IIS farm.

    IIS ARR will automatically detect if a server in the server farm is available and proxy the request to a healthy server if it is unavailable.
    Configure health check monitoring

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