Add lambda example

.gitignore

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+*.zip
 *.dll
 *.exe
 .DS_Store

examples/lambda/README.md

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+# Lambda Example
+
+This examples shows how to deploy an AWS Lambda function. 
+
+To run, configure your AWS provider as described in https://www.terraform.io/docs/providers/aws/index.html
+
+Running the example
+
+run `terraform apply` to see it work.

examples/lambda/hello_lambda.py

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+import os
+
+def lambda_handler(event, context):
+    # This will show up in CloudWatch
+    print("Value of 'foo': " + os.environ['foo'])
+    return 'Hello from Lambda!'

examples/lambda/main.tf

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+# Specify the provider and access details
+provider "aws" {
+  region = "${var.aws_region}"
+}
+
+provider "archive" {}
+
+data "archive_file" "zip" {
+  type        = "zip"
+  source_file = "hello_lambda.py"
+  output_path = "hello_lambda.zip"
+}
+
+data "aws_iam_policy_document" "policy" {
+  statement {
+    sid    = ""
+    effect = "Allow"
+
+    principals {
+      identifiers = ["lambda.amazonaws.com"]
+      type        = "Service"
+    }
+
+    actions = ["sts:AssumeRole"]
+  }
+}
+
+resource "aws_iam_role" "iam_for_lambda" {
+  name               = "iam_for_lambda"
+  assume_role_policy = "${data.aws_iam_policy_document.policy.json}"
+}
+
+resource "aws_lambda_function" "lambda" {
+  function_name = "hello_lambda"
+
+  filename         = "${data.archive_file.zip.output_path}"
+  source_code_hash = "${data.archive_file.zip.output_sha}"
+
+  role    = "${aws_iam_role.iam_for_lambda.arn}"
+  handler = "hello_lambda.lambda_handler"
+  runtime = "python3.6"
+
+  environment {
+    variables = {
+      foo = "bar"
+    }
+  }
+}

examples/lambda/outputs.tf

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+output "lambda" {
+  value = "${aws_lambda_function.lambda.qualified_arn}"
+}

examples/lambda/variables.tf

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+variable "aws_region" {
+  description = "The AWS region to create things in."
+  default     = "us-east-1"
+}