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Module - GitHub App web hook

This module is treated as internal module, breaking changes will not trigger a major release bump.

This module creates an API gateway endpoint and lambda function to handle GitHub App webhook events.

Lambda Function

The Lambda function is written in TypeScript and requires Node 12.x and yarn. Sources are located in [./lambdas/webhook].

Install

cd lambdas/webhook
yarn install

Test

Test are implemented with Jest, calls to AWS and GitHub are mocked.

yarn run test

Package

To compile all TypeScript/JavaScript sources in a single file ncc is used.

yarn run dist

Requirements

Name Version
terraform >= 1.3.0
aws ~> 5.27
null ~> 3.2

Providers

Name Version
aws ~> 5.27
null ~> 3.2

Modules

No modules.

Resources

Name Type
aws_apigatewayv2_api.webhook resource
aws_apigatewayv2_integration.webhook resource
aws_apigatewayv2_route.webhook resource
aws_apigatewayv2_stage.webhook resource
aws_cloudwatch_log_group.webhook resource
aws_iam_role.webhook_lambda resource
aws_iam_role_policy.webhook_logging resource
aws_iam_role_policy.webhook_sqs resource
aws_iam_role_policy.webhook_ssm resource
aws_iam_role_policy.webhook_workflow_job_sqs resource
aws_iam_role_policy.xray resource
aws_iam_role_policy_attachment.webhook_vpc_execution_role resource
aws_lambda_function.webhook resource
aws_lambda_permission.webhook resource
aws_ssm_parameter.runner_matcher_config resource
null_resource.github_app_parameters resource
aws_iam_policy_document.lambda_assume_role_policy data source
aws_iam_policy_document.lambda_xray data source

Inputs

Name Description Type Default Required
aws_partition (optional) partition for the base arn if not 'aws' string "aws" no
github_app_parameters Parameter Store for GitHub App Parameters. 
object({
    webhook_secret = map(string)
  })
 n/a yes
kms_key_arn Optional CMK Key ARN to be used for Parameter Store. string null no
lambda_architecture AWS Lambda architecture. Lambda functions using Graviton processors ('arm64') tend to have better price/performance than 'x86_64' functions. string "arm64" no
lambda_memory_size Memory size limit in MB for lambda. number 256 no
lambda_runtime AWS Lambda runtime. string "nodejs20.x" no
lambda_s3_bucket S3 bucket from which to specify lambda functions. This is an alternative to providing local files directly. string null no
lambda_security_group_ids List of security group IDs associated with the Lambda function. list(string) [] no
lambda_subnet_ids List of subnets in which the action runners will be launched, the subnets needs to be subnets in the vpc_id. list(string) [] no
lambda_timeout Time out of the lambda in seconds. number 10 no
lambda_zip File location of the lambda zip file. string null no
log_level Logging level for lambda logging. Valid values are 'silly', 'trace', 'debug', 'info', 'warn', 'error', 'fatal'. string "info" no
logging_kms_key_id Specifies the kms key id to encrypt the logs with string null no
logging_retention_in_days Specifies the number of days you want to retain log events for the lambda log group. Possible values are: 0, 1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1827, and 3653. number 180 no
prefix The prefix used for naming resources string "github-actions" no
repository_white_list List of github repository full names (owner/repo_name) that will be allowed to use the github app. Leave empty for no filtering. list(string) [] no
role_path The path that will be added to the role; if not set, the environment name will be used. string null no
role_permissions_boundary Permissions boundary that will be added to the created role for the lambda. string null no
runner_matcher_config SQS queue to publish accepted build events based on the runner type. When exact match is disabled the webhook accepts the event if one of the workflow job labels is part of the matcher. The priority defines the order the matchers are applied. 
map(object({
    arn  = string
    id   = string
    fifo = bool
    matcherConfig = object({
      labelMatchers = list(list(string))
      exactMatch    = bool
      priority      = optional(number, 999)
    })
  }))
 n/a yes
sqs_workflow_job_queue SQS queue to monitor github events. 
object({
    id  = string
    arn = string
  })
 null no
ssm_paths The root path used in SSM to store configuration and secrets. 
object({
    root    = string
    webhook = string
  })
 n/a yes
tags Map of tags that will be added to created resources. By default resources will be tagged with name and environment. map(string) {} no
tracing_config Configuration for lambda tracing. 
object({
    mode                  = optional(string, null)
    capture_http_requests = optional(bool, false)
    capture_error         = optional(bool, false)
  })
 {} no
webhook_lambda_apigateway_access_log_settings Access log settings for webhook API gateway. 
object({
    destination_arn = string
    format          = string
  })
 null no
webhook_lambda_s3_key S3 key for webhook lambda function. Required if using S3 bucket to specify lambdas. string null no
webhook_lambda_s3_object_version S3 object version for webhook lambda function. Useful if S3 versioning is enabled on source bucket. string null no

Outputs

Name Description
endpoint_relative_path n/a
gateway n/a
lambda n/a
lambda_log_group n/a
role n/a