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wannabe_f5admin's avatar
wannabe_f5admin
Icon for Cirrus rankCirrus
Jun 28, 2021

New GTM addition to existing mesh

Hi Folks,   I am intending to add couple of GTMs to our existing topology.. I did some research and seems the easiest way to do so is by using the gtm_add command.. Is there any video available o...
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AlexBCT's avatar
AlexBCT
Icon for Cumulonimbus rankCumulonimbus
Jun 29, 2021

Hi,

 

gtm_add is indeed the way to do this. (It's a bit strange that this has to be done via CLI - not sure why there's still not a GUI button for this ;)

 

Some things to look out for;

  • Backups of both sides... you never know! ;)
  • Check that both systems are running the same software version and NTP.
  • Add the system that you are about to add to the existing GTM infrastructure. (Under DNS - GSLB - Servers) This will ensure that the GTM's know where they are logically located.
  • Run gtm_add from the NEW system - it pulls in the configuration from the existing member you connect to. If you run this from an existing GTM, you will end up with a nice empty config...
  • Once the services are finished restarting, check that the new GTM now contains the same GSLB config and that it's showing as green in the old GTM system
  • Note that some elements are NOT synced (such as DNS listeners)

 

You can also find more details here: https://support.f5.com/csp/article/K45907236

 

Hope this helps.