7.0

18. source_machine_name: cbp_centos_63_x86
19. cost_center: sales
20. _cluster: 2
21. apache:
22. type: Software.Apache
23. data:
24. host: '${_resource~web}'
25. http_port: 8080
Each of these lines plays an important role in the blueprint structure.
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Lines 1 - 4 represent possible top level blueprint fields that provide identifying information. The only
other possible field is description. The semantics of these fields is straightforward, but you can
refer to java.classBlueprintDocument for more information.
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Line 4 represents the blueprint components. Each key under components is the ID of the component
that must be unique under the current blueprint.
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Lines 5 - 19 correspond to the Web component. The following appear under any component data:
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The key type is mandatory and must refer to the component type on which the current
component is based.
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The key dependsOn is optional and contains the list of component IDs current component
depends on. Component dependencies are extracted automatically based on property binding
expressions. In most cases, you do not need to explicitly specify component dependencies.
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The key data defines the component configuration and appears under all component data.
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Key is the name of the property or field of that component. This can be a property defined in
the corresponding component type.
Property or field option Example
A property defined in the corresponding component type
cpu
A reserved property
_cluster
Custom property
cost_center
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The value of the field can be directly defined as in cpu: 2, or you can defines its constraints,
as done for the memory field in the example.
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Line 16 shows how to specify and entity reference field. The available sub-keys are id and label.
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Line 24 depicts several things.
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${<field_path>} provides a way to express the value of a field to come from another field.
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_resource is a reserved field ID that captures the output of entire blueprint. Output from each
component is exposed under the same key as component ID. So in this case, host value is set to
the output of the web component thus saying the apache component needs to be hosted on
machine provisioned from the web component.
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Whenever a property binding refers to output of some other component, it creates an implicit
dependency between components.
Programming Guide
VMware, Inc. 391