Clustering with Confluence Data Center

[Shivashankar Gopal]

Hello Community,

I am currently looking at implementing Clustering with Confluence Data Center for my organisation.  My company uses Jira, Confluence products on Data Center and have single application node (Linux VM) connected to the database server (PostgreSQL). There are articles to recommend cluster architecture through multiple applications nodes, however, I am unable to find solution for multiple application nodes connected to multiple database servers. 

Could anyone please help me with this resiliency requirement and I am unable to use any of Amazon products - (RDS Multi-AZ and Amazon PostgreSQL-Compatible Aurora) setup for Database setup.