MySQL failover: how application can be switched to a new master in master-slave configuration?












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In my case I have two MySQL servers. One is master and second one is slave.



When slave is not available, my application can read and write from/to master.



When master is not available, assume there is a tool mysqlfailover which successfully nominates a new master (from slave).



It sounds good, but application has master hostname inside the configuration. So it fails to find it.



What are available options to solve this problem? How application can be switched to a new master?



I know that I can switch hostname to point to the new IP, use Kubernetes (StatefulSet) + DB in a container, but anything else as free option on bare metal?



If speaking broadly, how this problem is solved using HA/failover tools?



Thank you









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    In my case I have two MySQL servers. One is master and second one is slave.



    When slave is not available, my application can read and write from/to master.



    When master is not available, assume there is a tool mysqlfailover which successfully nominates a new master (from slave).



    It sounds good, but application has master hostname inside the configuration. So it fails to find it.



    What are available options to solve this problem? How application can be switched to a new master?



    I know that I can switch hostname to point to the new IP, use Kubernetes (StatefulSet) + DB in a container, but anything else as free option on bare metal?



    If speaking broadly, how this problem is solved using HA/failover tools?



    Thank you









    share







    New contributor




    Laimis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























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      In my case I have two MySQL servers. One is master and second one is slave.



      When slave is not available, my application can read and write from/to master.



      When master is not available, assume there is a tool mysqlfailover which successfully nominates a new master (from slave).



      It sounds good, but application has master hostname inside the configuration. So it fails to find it.



      What are available options to solve this problem? How application can be switched to a new master?



      I know that I can switch hostname to point to the new IP, use Kubernetes (StatefulSet) + DB in a container, but anything else as free option on bare metal?



      If speaking broadly, how this problem is solved using HA/failover tools?



      Thank you









      share







      New contributor




      Laimis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      In my case I have two MySQL servers. One is master and second one is slave.



      When slave is not available, my application can read and write from/to master.



      When master is not available, assume there is a tool mysqlfailover which successfully nominates a new master (from slave).



      It sounds good, but application has master hostname inside the configuration. So it fails to find it.



      What are available options to solve this problem? How application can be switched to a new master?



      I know that I can switch hostname to point to the new IP, use Kubernetes (StatefulSet) + DB in a container, but anything else as free option on bare metal?



      If speaking broadly, how this problem is solved using HA/failover tools?



      Thank you







      mysql high-availability failover rails





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