How Galera Multi-Master works and what are the main elements involved?

Solution Verified - Updated -

Issue

  • I need a better understanding of how Galera Multi-Master cluster works.
  • What are the pro and cons of Galera Multi-Master?
  • What is the primary component?
  • Is it an expectation that one node is in primary state?

Environment

  • Red Hat Enterprise Linux OpenStack Platform 5
  • Red Hat Enterprise Linux OpenStack Platform 6
  • Red Hat Enterprise Linux OpenStack Platform 7
  • Red Hat OpenStack Platform 8.

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