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General BalanceNG upgrade procedure for a dual node HA setup

The upgrade procedure consists of the following steps:

  • Shutdown of the current VRRP backup (“bng stop”)
  • Upgrade of the VRRP backup node with the new BalanceNG release (either by replacement of binary or package reinstall)
  • Restart of BalanceNG on the VRRP backup node (“bng start”)
  • Shutdown of the current VRRP master (“bng stop”), the already upgraded backup takes over and becomes the new master
  • Upgrade BalanceNG on the former master (either by replacement of binary or package reinstall)
  • Restart of BalanceNG on the former VRRP master (“bng start”), the node becomes the new backup (if VRRP priority != 255)
  • … done !