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Glossary
- API server
-
HTTP REST API service for heat.
- CFN
-
An abbreviated form of "AWS CloudFormation".
- constraint
-
Defines valid input
parameters
for atemplate
. - dependency
-
When a
resource
must wait for another resource to finish creation before being created itself. Heat adds an implicit dependency when a resource references another resource or one of itsattributes <resource attribute>
. An explicit dependency can also be created by the user in the template definition. - environment
-
Used to affect the run-time behavior of the template. Provides a way to override the default resource implementation and parameters passed to Heat. See
Environments
. - Heat Orchestration Template
-
A particular
template
format that is native to Heat. Heat Orchestration Templates are expressed in YAML and are not backwards-compatible with CloudFormation templates. - HOT
-
An acronym for "
Heat Orchestration Template
". - input parameters
-
See
parameters
. - Metadata
-
May refer to
Resource Metadata
,Nova Instance metadata
, or theMetadata service
. - Metadata service
-
A Compute service that enables virtual machine instances to retrieve instance-specific data. See
Nova Metadata service documentation <user/metadata.html#metadata-service>
. - multi-region
-
A feature of Heat that supports deployment to multiple regions.
- nested resource
-
A
resource
instantiated as part of anested stack
. - nested stack
-
A
template
referenced by URL inside of another template. Used to reduce redundant resource definitions and group complex architectures into logical groups. - Nova Instance metadata
-
User-provided key:value pairs associated with a Compute Instance. See Instance-specific data (OpenStack Operations Guide).
- OpenStack
-
Open source software for building private and public clouds.
- orchestrate
-
Arrange or direct the elements of a situation to produce a desired effect.
- outputs
-
A top-level block in a
template
that defines what data will be returned by a stack after instantiation. - parameters
-
A top-level block in a
template
that defines what data can be passed to customise a template when it is used to create or update astack
. - provider resource
-
A
resource
implemented by aprovider template
. The parent resource's properties become thenested stack's <nested stack>
parameters. - provider template
-
Allows user-definable
resource providers <resource provider>
to be specified vianested stacks <nested stack>
. The nested stack'soutputs
become the parent stack'sattributes <resource attribute>
. - resource
-
An element of OpenStack infrastructure instantiated from a particular
resource provider
. See alsonested resource
. - resource attribute
-
Data that can be obtained from a
resource
, e.g. a server's public IP or name. Usually passed to another resource'sproperties <resource property>
or added to the stack'soutputs
. - resource group
-
A
resource provider
that creates one or more identically configuredresources <resource>
ornested resources <nested resource>
. - Resource Metadata
-
A
resource property
that contains CFN-style template metadata. See AWS::CloudFormation::Init (AWS CloudFormation User Guide) - resource plugin
-
Python code that understands how to instantiate and manage a
resource
. See Heat Resource Plugins (OpenStack wiki). - resource property
-
Data utilized for the instantiation of a
resource
. Can be defined statically in atemplate
or passed in asinput parameters <parameters>
. - resource provider
-
The implementation of a particular resource type. May be a
resource plugin
or aprovider template
. - stack
-
A collection of instantiated
resources <resource>
that are defined in a singletemplate
. - stack resource
-
A
resource provider
that allows the management of anested stack
as aresource
in a parent stack. - template
-
An orchestration document that details everything needed to carry out an
orchestration <orchestrate>
. - template resource
-
See
provider resource
. - user data
-
A
resource property
that contains a user-provided data blob. User data gets passed to cloud-init to automatically configure instances at boot time. See alsoNova User data documentation <user/metadata.html#user-provided-data>
. - wait condition
-
A
resource provider
that provides a way to communicate data or events from servers back to the orchestration engine. Most commonly used to pause the creation of thestack
while the server is being configured.