MySQL ClusterDB Ansible Script Addition

[myasas]

@nilesh93 , @kosalag, @sanjiva
The POC (poc-mysql_cluster_db.pdf) was concluded with x2 options and I selected option 2 as a GO, considering factors such as, timelines, ease of implementation and maintainability, etc.,

Note: Please note that poc-mysql_cluster_db.pdf in myasas/Deployment includes the POC conducted on configuring x3 node mysql clusted db with HA proxy.

1. option 1: MySQL InnoDB Cluster

• Uses Group Replication.
• It uses the innoDB engine (same as its used in single node instances, which developers use)
• The option which has the least amount of dependencies on third parties
• Don't have to rely on external tools, scripts or other components
• It leverages proven MySQL features including InnoDB, GTIDs, binary logs, multi-threaded slave execution, multi-source replication and Performance Schema.

2. option 2: Galera Cluster for MySQL

• Uses Master-Master replication with HA proxy.
• It uses the innoDB engine (same as its used in single node instances, which developers use)
• It has the least amount of configurations compared to option one, though it has dependencies on Galera.
• It has Automatic Node Provisioning feature where its not needed to manually back up the database and copy it to the new node.

Thank you !