/terraform-aws-lambda

Terraform module to create Lambda resource on AWS for create lambda function.

Primary LanguageHCLMIT LicenseMIT

Terraform AWS Lambda

Terraform module to create Lambda resource on AWS for create lambda function.

Terraform Licence


We eat, drink, sleep and most importantly love DevOps. We are working towards stratergies for standardizing architecture while ensuring security for the infrastructure. We are strong believer of the philosophy Bigger problems are always solved by breaking them into smaller manageable problems. Resonating with microservices architecture, it is considered best-practice to run database, cluster, storage in smaller connected yet manageable pieces within the infrastructure.

This module is basically combination of Terraform open source and includes automatation tests and examples. It also helps to create and improve your infrastructure with minimalistic code instead of maintaining the whole infrastructure code yourself.

We have fifty plus terraform modules. A few of them are comepleted and are available for open source usage while a few others are in progress.

Prerequisites

This module has a few dependencies:

Examples

IMPORTANT: Since the master branch used in source varies based on new modifications, we suggest that you use the release versions here.

Here are some examples of how you can use this module in your inventory structure:

Basic Function

  module "lambda" {
    source         = "git::https://github.com/clouddrove/terraform-aws-lambda.git?ref=tags/0.12.2"
    name           = "lambda"
    application    = "clouddrove"
    environment    = "test"
    label_order    = ["environment", "name", "application"]
    enabled        = true
    filename       = "./../../../lambda_function_payload"
    handler        = "index.handler"
    runtime        = "nodejs8.10"
    variables      = {
                       foo = "bar"
                     }
  }

Basic S3 Function

  module "lambda" {
    source        = "git::https://github.com/clouddrove/terraform-aws-lambda.git?ref=tags/0.12.2"
    name          = "lambda"
    application   = "clouddrove"
    environment   = "test"
    label_order   = ["environment", "name", "application"]
    enabled       = true
    s3_bucket     = "test-mysql-backups"
    s3_key        = "lambda_function_payload.zip"
    handler       = "index.handler"
    runtime       = "nodejs8.10"
    variables     = {
                      foo = "bar"
                    }
  }

Complete Function

  module "lambda" {
    source               = "git::https://github.com/clouddrove/terraform-aws-lambda.git?ref=tags/0.12.2"
    name                 = "lambda"
    application          = "clouddrove"
    environment          = "test"
    label_order          = ["environment", "name", "application"]
    enabled              = true
    filename             = "./../../../lambda_function_payload"
    handler              = "index.handler"
    runtime              = "nodejs8.10"
    subnet_ids           = ["subnet-xxxxxxxxxxxxxx", "subnet-xxxxxxxxxxxxxx"]
    security_group_ids   = ["sg-xxxxxxxxxxxxxx", "sg-xxxxxxxxxxxxxx"]
    iam_actions          = [
                            "logs:CreateLogStream",
                            "logs:CreateLogGroup",
                            "logs:PutLogEvents",
                            "ec2:CreateNetworkInterface",
                            "ec2:DescribeNetworkInterfaces",
                            "ec2:DeleteNetworkInterface",
                            "ec2:DescribeSecurityGroups",
                           ]
    names                = [
                            "lambda_layer_name"
                           ]
    filenames            = [
                            {
                              "input"="./../../../lambda_function_payload",
                              "output"="lambda_function_payload.zip",
                            }
                           ]
    compatible_runtimes  = [
                            ["nodejs8.10"]
                           ]

    statement_ids        = [
                            "AllowExecutionFromSNS"
                           ]
    actions              = [
                            "lambda:InvokeFunction"
                           ]
    principals           = [
                            "sns.amazonaws.com"
                           ]
    source_arns          = [
                            "arn:aws:sns:eu-west-1:xxxxxxxxxxxxxx:test-sns-clouddrove"
                           ]
    variables            = {
                             foo = "bar"
                           }
  }

Inputs

Name Description Type Default Required
actions The AWS Lambda action you want to allow in this statement. (e.g. lambda:InvokeFunction). list <list> no
application Application (e.g. cd or clouddrove). string `` no
attributes Additional attributes (e.g. 1). list <list> no
compatible_runtimes A list of Runtimes this layer is compatible with. Up to 5 runtimes can be specified. list <list> no
delimiter Delimiter to be used between organization, environment, name and attributes. string - no
description Description of what your Lambda Function does. string `` no
descriptions Description of what your Lambda Layer does. list <list> no
enabled Whether to create lambda function. bool false no
environment Environment (e.g. prod, dev, staging). string `` no
event_source_tokens The Event Source Token to validate. Used with Alexa Skills. list <list> no
filename The path to the function's deployment package within the local filesystem. If defined, The s3_-prefixed options cannot be used. string `` no
filenames The path to the function's deployment package within the local filesystem. If defined, The s3_-prefixed options cannot be used. list <list> no
handler The function entrypoint in your code. string - yes
iam_actions The actions for Iam Role Policy. list <list> no
kms_key_arn The ARN for the KMS encryption key. string `` no
label_order Label order, e.g. name,application. list <list> no
layers List of Lambda Layer Version ARNs (maximum of 5) to attach to your Lambda Function. string `` no
license_infos License info for your Lambda Layer. See License Info. list <list> no
memory_size Amount of memory in MB your Lambda Function can use at runtime. Defaults to 128. number 128 no
name Name (e.g. app or cluster). string `` no
names A unique name for your Lambda Layer. list <list> no
principals The principal who is getting this permission. e.g. s3.amazonaws.com, an AWS account ID, or any valid AWS service principal such as events.amazonaws.com or sns.amazonaws.com. list <list> no
publish Whether to publish creation/change as new Lambda Function Version. Defaults to false. bool false no
qualifiers Query parameter to specify function version or alias name. The permission will then apply to the specific qualified ARN. e.g. arn:aws:lambda:aws-region:acct-id:function:function-name:2 list <list> no
reserved_concurrent_executions The amount of reserved concurrent executions for this lambda function. A value of 0 disables lambda from being triggered and -1 removes any concurrency limitations. Defaults to Unreserved Concurrency Limits -1. number -1 no
runtime Runtimes. string - yes
s3_bucket The S3 bucket location containing the function's deployment package. Conflicts with filename. This bucket must reside in the same AWS region where you are creating the Lambda function. string `` no
s3_buckets The S3 bucket location containing the function's deployment package. Conflicts with filename. This bucket must reside in the same AWS region where you are creating the Lambda function. list <list> no
s3_keies The S3 key of an object containing the function's deployment package. Conflicts with filename. list <list> no
s3_key The S3 key of an object containing the function's deployment package. Conflicts with filename. string `` no
s3_object_version The object version containing the function's deployment package. Conflicts with filename. string `` no
s3_object_versions The object version containing the function's deployment package. Conflicts with filename. list <list> no
security_group_ids Security group ids for vpc config. list <list> no
source_accounts This parameter is used for S3 and SES. The AWS account ID (without a hyphen) of the source owner. list <list> no
source_arns When granting Amazon S3 or CloudWatch Events permission to invoke your function, you should specify this field with the Amazon Resource Name (ARN) for the S3 Bucket or CloudWatch Events Rule as its value. This ensures that only events generated from the specified bucket or rule can invoke the function. list <list> no
statement_ids A unique statement identifier. By default generated by Terraform. list <list> no
subnet_ids Subnet ids for vpc config. list <list> no
tags Additional tags (e.g. map(BusinessUnit,XYZ). map <map> no
timeout The amount of time your Lambda Function has to run in seconds. Defaults to 3. number 3 no
variables A map that defines environment variables for the Lambda function. map <map> no

Outputs

Name Description
arn The Amazon Resource Name (ARN) identifying your Lambda Function.
tags A mapping of tags to assign to the resource.

Testing

In this module testing is performed with terratest and it creates a small piece of infrastructure, matches the output like ARN, ID and Tags name etc and destroy infrastructure in your AWS account. This testing is written in GO, so you need a GO environment in your system.

You need to run the following command in the testing folder:

  go test -run Test

Feedback

If you come accross a bug or have any feedback, please log it in our issue tracker, or feel free to drop us an email at hello@clouddrove.com.

If you have found it worth your time, go ahead and give us a ★ on our GitHub!

About us

At CloudDrove, we offer expert guidance, implementation support and services to help organisations accelerate their journey to the cloud. Our services include docker and container orchestration, cloud migration and adoption, infrastructure automation, application modernisation and remediation, and performance engineering.

We are The Cloud Experts!


We ❤️ Open Source and you can check out our other modules to get help with your new Cloud ideas.