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Migrate DNS & Cluster to new server(s) - How to best achieve?

Discussion in 'Bind / DNS / Nameserver Issues' started by Sovjohn, Feb 22, 2017.

  1. Sovjohn

    Sovjohn Member

    Jun 29, 2003
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    Piraeus, Attica, Greece
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    So, I've got a slightly weird scenario and would like to know what you think of it:

    Right now, a CPanel server (let's call it Server A) has a given IP address as main address and is in a cluster. Server B and Server C is in the cluster.

    The IP addresses of server A & server B are also declared in GLUE records for domain names ( of the type - server C is not, it's just part of the cluster.

    What's the issue here - I want to make DNS independent of server A, because I plan to stop using server A soon.

    How would this be most effectively achieved, I wonder?

    Here's what I thought:

    Have server A "take server C's place" i.e. belong in the cluster, but being removed from GLUE records in domain names.

    Then, from the current status where it's:

    ns1 in GLUE - Server A
    ns2 in GLUE - Server B
    (server C in cluster but not in GLUE)
    We'd have:

    ns1 in GLUE - Server B
    ns2 in GLUE - Server C
    (server A in cluster but not in GLUE)

    But is this the right way to do this? Or should I, perhaps, disable DNS on server A entirely and have DNS served only by servers B and C?

    Furthermore, if what I'm describing can work, should I delete the current cluster and re-make a new one at Server B? I've noticed that the primary server performs better (?) sync with other cluster members, i.e. if I say, add a new account at Server B at the moment (which is secondary in the cluster) it may not necessarily sync to Server A until I run "Syncronize DNS to all servers".

    Any advise on the best practices to follow re: the above will be most welcome!

  2. cPanelMichael

    cPanelMichael Forums Analyst
    Staff Member

    Apr 11, 2011
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