What is the building block of a Blueprint?

In Nutanix Calm, every blueprint is composed of one or more Services. A Service represents a logical application component (usually a VM or container) and contains the runtime, configuration, dependencies and lifecycle actions for that component. Calm assembles these Services to form Single-VM or Multi-VM blueprints, but the atomic, reusable object—the “building block”—is the Service itself.

B. Single-VM Blueprint – A blueprint that happens to contain only one service; it is a type of blueprint, not the unit used to construct one.
C. Runbook – Automates sequential tasks independently of blueprints; it is not embedded inside a blueprint.
D. Multi-VM Blueprint – Describes a blueprint with multiple services; again, it is the finished artifact, not the elemental building block.

1. Nutanix Calm Administration & Operations Guide v3.7, “Services: The fundamental building blocks of a blueprint” (Section 4.2, p. 46).

2. Nutanix University Courseware – Calm Design & Deploy (Lesson 2, Slide 11): “Service objects are the core building blocks from which a blueprint is assembled.”

3. Nutanix Calm 3.7 API/CLI Guide, Section “Blueprint Model > Service Object” (p. 15).