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Domain-Independent Availability Groups without DNS Server

  • November 3, 2022 at 11:47 am

    #4108153

    Hi there,

    Just wondering if anyone knows whether it's possible to create Domain-Independent Availability Groups on a WSFC without having a DNS server?

    Every guide I've found seems to require a separate DNS server, whereas I'm wondering if simply adding all the required IP addresses for each resource into the hosts file on each node would be sufficient?

    Obviously having a Listener would no longer be possible, and clients would need to connect to each node via IP, but I'm unsure whether it's even possible/advisable to get a WSFC to work reliably in this way?

    Thanks

  • November 4, 2022 at 7:40 am

    #4108566

    Hi,

    if you use a listener, I think you need a DNS server, because the IP from the listener will change to the active node if a failover occurs.

    But we do not know how you will use your AOAG.

    Kind regards,

    Andreas

  • November 8, 2022 at 9:22 am

    #4109955

    Hi Andreas,

    No we wouldn't be able to use a listener as you say - we would need to refer to each node separately by IP address and handle the failover between these elsewhere.

    I believe the configuration using only host files should technically work, but I'm not sure whether there may be problems in terms of cluster stability/reliability/anything else?

    We're using an AWS environment with no domain or DNS server, so I'm looking for a way to get around it. I've also read that clusterless AGs are not recommended for DR, so thought I'd stick with Domain-Independent AGs.

    Thanks

    • This reply was modified 2 years ago by  mg_dba.

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