LambdaPermission | Praxis resources

Resource definition

What this resource looks like

This is the CUE shape a Praxis template uses to declare a LambdaPermission. The resource key is local to the template; metadata.name supplies its stable Praxis identity.

resources: {
  workerSnsPermission: {
  	apiVersion: "praxis.io/alpha"
  	kind:       "LambdaPermission"
  	metadata: name: "\(_naming.prefix)-worker-sns-perm"
  	spec: {
  		region:       _naming.region
  		functionName: "${resources.worker.outputs.functionName}"
  		action:       "lambda:InvokeFunction"
  		principal:    "sns.amazonaws.com"
  		sourceArn:    "${resources.alertTopic.outputs.topicArn}"
  	}
  }
}

Excerpted from examples/stacks/end-to-end.cue. Open the complete example for its variables and related resources.

Complete examples in the repository

stacks end to end

Desired state

Configuration

The spec block accepts 9 fields. 3 are required by the schema; fields with defaults can be omitted.

regionRequired

Region.

string

String

functionNameRequired

Function Name.

string

String

statementIdOptional

Statement ID.

string

String

actionOptional

Action.

string | *"lambda:InvokeFunction"

EnumDefault "lambda:InvokeFunction"

principalRequired

Principal.

string

String

sourceArnOptional

Source ARN.

string

String

sourceAccountOptional

Source Account.

string

String

eventSourceTokenOptional

Event Source Token.

string

String

qualifierOptional

Qualifier.

string

String

Observed values

Outputs

Praxis records these values after observation. A dependent resource can read one with ${resources.<name>.outputs.<field>}.

statementIdString

functionNameString

statementString

Read without ownership

Data-source lookup

A data block reads an existing LambdaPermission and exposes its outputs without storing lifecycle state. The generic filter surface accepts id, name, and tag; supported combinations depend on the AWS identity used by this resource.

data: existing: {
  kind: "LambdaPermission"
  region: "us-west-2"
  filter: {
    name: "replace-with-provider-name"
  }
}

Understand data sources and filters →

Adopt existing infrastructure

Import

Import persists Praxis state for an existing AWS resource. For this kind, supply: Provider identifier for the existing LambdaPermission. The example starts in observed mode so Praxis reports drift without correcting it.

praxis import LambdaPermission \
  --id <provider-identifier> \
  --region us-west-2 \
  --account production \
  --observe

Choose managed or observed ownership →

Canonical contract

Complete CUE schema

The field guide above is derived from this definition. The schema remains the source of truth for accepted values, defaults, validation constraints, and outputs in the current alpha revision.

Show the complete schema

package lambda

#LambdaPermission: {
	apiVersion: "praxis.io/alpha"
	kind:       "LambdaPermission"
	metadata: {
		name: =~"^[a-zA-Z0-9][a-zA-Z0-9_-]{0,99}$"
	}
	spec: {
		region:            string
		functionName:      string
		statementId?:      string
		action?:           string | *"lambda:InvokeFunction"
		principal:         string
		sourceArn?:        string
		sourceAccount?:    string
		eventSourceToken?: string
		qualifier?:        string
	}
	outputs?: {
		statementId:  string
		functionName: string
		statement:    string
	}
}

View this schema on GitHub →