New Data Source: aws_lambda_invocation

aws/data_source_aws_lambda_invocation.go

@@ -0,0 +1,94 @@
+package aws
+
+import (
+	"crypto/md5"
+	"encoding/json"
+	"fmt"
+	"log"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/service/lambda"
+	"github.com/hashicorp/terraform/helper/schema"
+)
+
+func dataSourceAwsLambdaInvocation() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceAwsLambdaInvocationRead,
+
+		Schema: map[string]*schema.Schema{
+			"function_name": {
+				Type:     schema.TypeString,
+				Required: true,
+				ForceNew: true,
+			},
+
+			"qualifier": {
+				Type:     schema.TypeString,
+				Optional: true,
+				ForceNew: true,
+				Default:  "$LATEST",
+			},
+
+			"input": {
+				Type:         schema.TypeString,
+				Required:     true,
+				ForceNew:     true,
+				ValidateFunc: validateJsonString,
+			},
+
+			"result": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+
+			"result_map": {
+				Type:     schema.TypeMap,
+				Computed: true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
+		},
+	}
+}
+
+func dataSourceAwsLambdaInvocationRead(d *schema.ResourceData, meta interface{}) error {
+	conn := meta.(*AWSClient).lambdaconn
+
+	functionName := d.Get("function_name").(string)
+	qualifier := d.Get("qualifier").(string)
+	input := []byte(d.Get("input").(string))
+
+	res, err := conn.Invoke(&lambda.InvokeInput{
+		FunctionName:   aws.String(functionName),
+		InvocationType: aws.String(lambda.InvocationTypeRequestResponse),
+		Payload:        input,
+		Qualifier:      aws.String(qualifier),
+	})
+
+	if err != nil {
+		return err
+	}
+
+	if res.FunctionError != nil {
+		return fmt.Errorf("Lambda function (%s) returned error: (%s)", functionName, string(res.Payload))
+	}
+
+	if err = d.Set("result", string(res.Payload)); err != nil {
+		return err
+	}
+
+	var result map[string]interface{}
+
+	if err = json.Unmarshal(res.Payload, &result); err != nil {
+		return err
+	}
+
+	if err = d.Set("result_map", result); err != nil {
+		log.Printf("[WARN] Cannot use the result invocation as a string map: %s", err)
+	}
+
+	d.SetId(fmt.Sprintf("%s_%s_%x", functionName, qualifier, md5.Sum(input)))
+
+	return nil
+}

aws/data_source_aws_lambda_invocation_test.go

@@ -0,0 +1,215 @@
+package aws
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform/helper/resource"
+	"github.com/hashicorp/terraform/terraform"
+)
+
+func testAccCheckLambdaInvocationResult(name, expectedResult string) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		rs, ok := s.RootModule().Resources[name]
+		if !ok {
+			return fmt.Errorf("Not found: %s", name)
+		}
+
+		if rs.Primary.ID == "" {
+			return fmt.Errorf("No ID is set")
+		}
+
+		result, ok := rs.Primary.Attributes["result"]
+
+		if !ok {
+			return fmt.Errorf("No result is set")
+		}
+
+		if !suppressEquivalentJsonDiffs("", result, expectedResult, nil) {
+			return fmt.Errorf("%s: Attribute 'result' expected %s, got %s", name, expectedResult, result)
+		}
+
+		return nil
+	}
+}
+
+func TestAccDataSourceAwsLambdaInvocation_basic(t *testing.T) {
+	testData := "value3"
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourceAwsLambdaInvocation_basic_config("tf-test-lambda-role", "tf-test-lambda-invocation", testData),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map.%", "3"),
+					resource.TestCheckResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map.key1", "value1"),
+					resource.TestCheckResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map.key2", "value2"),
+					resource.TestCheckResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map.key3", testData),
+					testAccCheckLambdaInvocationResult("data.aws_lambda_invocation.invocation_test", `{"key1":"value1","key2":"value2","key3":"`+testData+`"}`),
+				),
+			},
+		},
+	})
+}
+
+func TestAccDataSourceAwsLambdaInvocation_qualifier(t *testing.T) {
+	testData := "value3"
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourceAwsLambdaInvocation_qualifier_config("tf-test-lambda-role-qualifier", "tf-test-lambda-invocation-qualifier", testData),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map.%", "3"),
+					resource.TestCheckResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map.key1", "value1"),
+					resource.TestCheckResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map.key2", "value2"),
+					resource.TestCheckResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map.key3", testData),
+				),
+			},
+		},
+	})
+}
+
+func TestAccDataSourceAwsLambdaInvocation_complex(t *testing.T) {
+	testData := "value3"
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourceAwsLambdaInvocation_complex_config("tf-test-lambda-role-complex", "tf-test-lambda-invocation-complex", testData),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckNoResourceAttr("data.aws_lambda_invocation.invocation_test", "result_map"),
+					testAccCheckLambdaInvocationResult("data.aws_lambda_invocation.invocation_test", `{"key1":{"subkey1":"subvalue1"},"key2":{"subkey2":"subvalue2","subkey3":{"a": "b"}},"key3":"`+testData+`"}`),
+				),
+			},
+		},
+	})
+}
+
+func testAccDataSourceAwsLambdaInvocation_base_config(roleName string) string {
+	return fmt.Sprintf(`
+data "aws_iam_policy_document" "lambda_assume_role_policy" {
+  statement {
+    effect  = "Allow"
+    actions = ["sts:AssumeRole"]
+
+    principals {
+      type        = "Service"
+      identifiers = ["lambda.amazonaws.com"]
+    }
+  }
+}
+
+resource "aws_iam_role" "lambda_role" {
+  name               = "%s"
+  assume_role_policy = "${data.aws_iam_policy_document.lambda_assume_role_policy.json}"
+}
+
+resource "aws_iam_role_policy_attachment" "lambda_role_policy" {
+  policy_arn = "arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
+  role       = "${aws_iam_role.lambda_role.name}"
+}
+`, roleName)
+}
+
+func testAccDataSourceAwsLambdaInvocation_basic_config(roleName, lambdaName, testData string) string {
+	return fmt.Sprintf(testAccDataSourceAwsLambdaInvocation_base_config(roleName)+`
+resource "aws_lambda_function" "lambda" {
+  depends_on = ["aws_iam_role_policy_attachment.lambda_role_policy"]
+
+  filename      = "test-fixtures/lambda_invocation.zip"
+  function_name = "%s"
+  role          = "${aws_iam_role.lambda_role.arn}"
+  handler       = "lambda_invocation.handler"
+  runtime       = "nodejs8.10"
+
+  environment {
+    variables = {
+      TEST_DATA = "%s"
+    }
+  }
+}
+
+data "aws_lambda_invocation" "invocation_test" {
+  function_name = "${aws_lambda_function.lambda.function_name}"
+
+  input = <<JSON
+{
+  "key1": "value1",
+  "key2": "value2"
+}
+JSON
+}
+`, lambdaName, testData)
+}
+
+func testAccDataSourceAwsLambdaInvocation_qualifier_config(roleName, lambdaName, testData string) string {
+	return fmt.Sprintf(testAccDataSourceAwsLambdaInvocation_base_config(roleName)+`
+resource "aws_lambda_function" "lambda" {
+  depends_on = ["aws_iam_role_policy_attachment.lambda_role_policy"]
+
+  filename      = "test-fixtures/lambda_invocation.zip"
+  function_name = "%s"
+  role          = "${aws_iam_role.lambda_role.arn}"
+  handler       = "lambda_invocation.handler"
+  runtime       = "nodejs8.10"
+  publish       = true
+
+  environment {
+    variables = {
+      TEST_DATA = "%s"
+    }
+  }
+}
+
+data "aws_lambda_invocation" "invocation_test" {
+  function_name = "${aws_lambda_function.lambda.function_name}"
+  qualifier     = "${aws_lambda_function.lambda.version}"
+
+  input = <<JSON
+{
+  "key1": "value1",
+  "key2": "value2"
+}
+JSON
+}
+`, lambdaName, testData)
+}
+
+func testAccDataSourceAwsLambdaInvocation_complex_config(roleName, lambdaName, testData string) string {
+	return fmt.Sprintf(testAccDataSourceAwsLambdaInvocation_base_config(roleName)+`
+resource "aws_lambda_function" "lambda" {
+  depends_on = ["aws_iam_role_policy_attachment.lambda_role_policy"]
+
+  filename      = "test-fixtures/lambda_invocation.zip"
+  function_name = "%s"
+  role          = "${aws_iam_role.lambda_role.arn}"
+  handler       = "lambda_invocation.handler"
+  runtime       = "nodejs8.10"
+  publish       = true
+
+  environment {
+    variables = {
+      TEST_DATA = "%s"
+    }
+  }
+}
+
+data "aws_lambda_invocation" "invocation_test" {
+  function_name = "${aws_lambda_function.lambda.function_name}"
+
+  input = <<JSON
+{
+  "key1": {"subkey1": "subvalue1"},
+  "key2": {"subkey2": "subvalue2", "subkey3": {"a": "b"}}
+}
+JSON
+}
+`, lambdaName, testData)
+}

aws/provider.go

@@ -217,6 +217,7 @@ func Provider() terraform.ResourceProvider {
 			"aws_kms_key":                          dataSourceAwsKmsKey(),
 			"aws_kms_secret":                       dataSourceAwsKmsSecret(),
 			"aws_lambda_function":                  dataSourceAwsLambdaFunction(),
+			"aws_lambda_invocation":                dataSourceAwsLambdaInvocation(),
 			"aws_mq_broker":                        dataSourceAwsMqBroker(),
 			"aws_nat_gateway":                      dataSourceAwsNatGateway(),
 			"aws_network_interface":                dataSourceAwsNetworkInterface(),

aws/test-fixtures/lambda_invocation.js

@@ -0,0 +1,6 @@
+exports.handler = async (event) => {
+    if (process.env.TEST_DATA) {
+        event.key3 = process.env.TEST_DATA;
+    }
+    return event;
+}

website/aws.erb

@@ -202,6 +202,9 @@
                         <li<%= sidebar_current("docs-aws-datasource-kms-secret") %>>
                             <a href="/docs/providers/aws/d/kms_secret.html">aws_kms_secret</a>
                         </li>
+                        <li<%= sidebar_current("docs-aws-datasource-lambda-invocation") %>>
+                            <a href="/docs/providers/aws/d/lambda_invocation.html">aws_lambda_invocation</a>
+                        </li>
                         <li<%= sidebar_current("docs-aws-datasource-nat-gateway") %>>
                            <a href="/docs/providers/aws/d/nat_gateway.html">aws_nat_gateway</a>
                         </li>

website/docs/d/lambda_invocation.html.markdown

@@ -0,0 +1,49 @@
+---
+layout: "aws"
+page_title: "AWS: aws_lambda_invocation"
+sidebar_current: "docs-aws-datasource-lambda-invocation"
+description: |-
+  Invoke AWS Lambda Function as data source
+---
+
+# Data Source: aws_lambda_invocation
+
+Use this data source to invoke custom lambda functions as data source.
+The lambda function is invoked with [RequestResponse](https://docs.aws.amazon.com/lambda/latest/dg/API_Invoke.html#API_Invoke_RequestSyntax)
+invocation type.
+
+## Example Usage
+
+```hcl
+data "aws_lambda_invocation" "example" {
+  function_name = "${aws_lambda_function.lambda_function_test.function_name}"
+
+  input = <<JSON
+{
+  "key1": "value1",
+  "key2": "value2"
+}
+JSON
+
+}
+
+output "result_entry" {
+  value = "${data.aws_lambda_invocation.result_map["key1"]}"
+}
+
+output "result" {
+  value = "${data.aws_lambda_invocation.result}"
+}
+```
+
+## Argument Reference
+
+ * `function_name` - (Required) The name of the lambda function.
+ * `input` - (Required) A string in JSON format that is passed as payload to the lambda function.
+ * `qualifier` - (Optional) The qualifier (a.k.a version) of the lambda function. Defaults
+ to `$LATEST`.
+
+## Attributes Reference
+
+ * `result` - A result of the lambda function invocation.
+ * `result_map` - This field is set only if result is a map of primitive types.