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How to keep IP address and hostname/FQDN during server migration.

  • 1.  How to keep IP address and hostname/FQDN during server migration.

    Posted Thu February 01, 2024 02:29 AM
    Edited by Ondřej Žižka Thu February 01, 2024 02:30 AM
    Hello,
     
    I would like to know your opinion. We are migrating a single Informix server (no HA, just one server instance with 2 databases on one operating system/server). The customer asked us to keep the server's IP address and hostname (FQDN) because they are not sure who (users or other services) is using IP and who uses hostname/FQDN to access the database. 
     
    They want to keep the IP address of the database server "same forever". This brings me an idea to separate the IP address from the server machine, but because the migration is done once in a blue moon (this one is done after 14 years) it also means, that the change of IP address of the server after data has been moved is not bad idea.
     
    I see here 3 options:
     
    1. Migrate data and change the IP address and hostname of the server (should need just update the OS hostname, OS IP and Informix sqlhosts file).
    2. Deploy proxy between clients and server with static IP (e.g. HA Proxy).
    3. Use Connection Manager as a proxy on a separate server (is this use case for CM, can CM be installed separately?)
     
    What are your experiences with this kind of migration/architectural change?
    Thank you for your opinions and ideas.



    ------------------------------
    Ondrej
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  • 2.  RE: How to keep IP address and hostname/FQDN during server migration.

    IBM Champion
    Posted Thu February 01, 2024 03:03 AM