To provision a PostgreSQL HA instance from a software profile created from a VM with services like etcd, HAProxy, Patroni, and keepalived installed, the administrator must ensure the instance aligns with NDB’s HA framework. These services (e.g., Patroni for PostgreSQL HA management, HAProxy for load balancing) may conflict with NDB’s built-in HA mechanisms. Provisioning an HA instance with these services disabled allows NDB to manage HA using its native replication and failover capabilities (e.g., streaming replication), avoiding duplication or interference from the VM’s pre-installed services.
Option A (Provision an HA instance with the services enabled) is incorrect because enabling these services may cause conflicts with NDB’s HA management.
Option B (Disable the services, create a software profile version, and provision an HA instance) is incorrect because disabling services and recreating a profile is unnecessary; the provisioning step can handle service configuration.
Option C (Provision an HA instance with the services disabled) is correct as it ensures NDB’s HA features take precedence without interference.
Option D (Enable the services, create a software profile version, and provision an HA instance) is incorrect due to potential conflicts with NDB’s HA implementation.
Note: The typo "PostqreSQL" is assumed to mean "PostgreSQL."
References
Nutanix Database Service (NDB) User Guide, Chapter 4: Managing Database Engines, Section: Provisioning HA Instances
Nutanix Certified Professional - Database Automation (NCP-DB) v7.5Blueprint, Section 4: Manage Database Engines
