make tags configurable for aws lambda

Cloees elastic#13080

x-pack/functionbeat/_meta/beat.reference.yml

@@ -47,6 +47,10 @@ functionbeat.provider.aws.functions:
     # Dead letter queue configuration, this must be set to an ARN pointing to a SQS queue.
     #dead_letter_config.target_arn:
 
+    # Tags are key-value pairs attached to the function.
+    #tags:
+    #  department: ops
+
     # Optional fields that you can specify to add additional information to the
     # output. Fields can be scalar values, arrays, dictionaries, or any nested
     # combination of these.
@@ -92,6 +96,10 @@ functionbeat.provider.aws.functions:
     # Dead letter queue configuration, this must be set to an ARN pointing to a SQS queue.
     #dead_letter_config.target_arn:
 
+    # Tags are key-value pairs attached to the function.
+    #tags:
+    #  department: ops
+
     # Optional fields that you can specify to add additional information to the
     # output. Fields can be scalar values, arrays, dictionaries, or any nested
     # combination of these.
@@ -142,6 +150,10 @@ functionbeat.provider.aws.functions:
     # Dead letter queue configuration, this must be set to an ARN pointing to a SQS queue.
     #dead_letter_config.target_arn:
 
+    # Tags are key-value pairs attached to the function.
+    #tags:
+    #  department: ops
+
     # Optional fields that you can specify to add additional information to the
     # output. Fields can be scalar values, arrays, dictionaries, or any nested
     # combination of these.

x-pack/functionbeat/functionbeat.reference.yml

@@ -47,6 +47,10 @@ functionbeat.provider.aws.functions:
     # Dead letter queue configuration, this must be set to an ARN pointing to a SQS queue.
     #dead_letter_config.target_arn:
 
+    # Tags are key-value pairs attached to the function.
+    #tags:
+    #  department: ops
+
     # Optional fields that you can specify to add additional information to the
     # output. Fields can be scalar values, arrays, dictionaries, or any nested
     # combination of these.
@@ -92,6 +96,10 @@ functionbeat.provider.aws.functions:
     # Dead letter queue configuration, this must be set to an ARN pointing to a SQS queue.
     #dead_letter_config.target_arn:
 
+    # Tags are key-value pairs attached to the function.
+    #tags:
+    #  department: ops
+
     # Optional fields that you can specify to add additional information to the
     # output. Fields can be scalar values, arrays, dictionaries, or any nested
     # combination of these.
@@ -142,6 +150,10 @@ functionbeat.provider.aws.functions:
     # Dead letter queue configuration, this must be set to an ARN pointing to a SQS queue.
     #dead_letter_config.target_arn:
 
+    # Tags are key-value pairs attached to the function.
+    #tags:
+    #  department: ops
+
     # Optional fields that you can specify to add additional information to the
     # output. Fields can be scalar values, arrays, dictionaries, or any nested
     # combination of these.

x-pack/functionbeat/manager/aws/template_builder.go

@@ -165,6 +165,15 @@ func (d *defaultTemplateBuilder) template(function installer, name, codeLoc stri
 		}
 	}
 
+	var tags []cloudformation.Tag
+	for name, val := range lambdaConfig.Tags {
+		tag := cloudformation.Tag{
+			Key:   name,
+			Value: val,
+		}
+		tags = append(tags, tag)
+	}
+
 	// Create the lambda
 	// Doc: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-lambda-function.html
 	template.Resources[prefix("")] = &AWSLambdaFunction{
@@ -190,6 +199,7 @@ func (d *defaultTemplateBuilder) template(function installer, name, codeLoc stri
 			MemorySize:                   lambdaConfig.MemorySize.Megabytes(),
 			ReservedConcurrentExecutions: lambdaConfig.Concurrency,
 			Timeout:                      int(lambdaConfig.Timeout.Seconds()),
+			Tags:                         tags,
 		},
 		DependsOn: dependsOn,
 	}

x-pack/functionbeat/provider/aws/aws/config.go

@@ -49,6 +49,7 @@ type LambdaConfig struct {
 	Timeout          time.Duration     `config:"timeout" validate:"nonzero,positive"`
 	Role             string            `config:"role"`
 	VPCConfig        *vpcConfig        `config:"virtual_private_cloud"`
+	Tags             map[string]string `config:"tags"`
 }
 
 // Validate checks a LambdaConfig