aws-monitoring-splunk-terraform

Terraform module to implement best-practise monitoring for AWS instances using following AWS Services:

• AWS CloudWatch Basic Monitoring
• VPC Flow Logs via AWS CloudWatch
• AWS CloudTrail
• AWS Config
• AWS Config Rules (in progress)

AWS monitoring services pushe notifications to SNS service and then to SQS queues, where those could be fetched by third party monitoring system, like Splunk.

Pre-requisites

• Terraform v0.12
• Splunk Enteprise/Cloud environment with installed Splunk App for AWS and Splunk Add-on for Amazon Web Services / or different monitoring solution
• AWS instance with API credentials

Input variables

See main.tf to set input variables for every module. Optionally, have a look at variables.tf of every module for details and customisations.

Example of use

See test directory for test examples or use the snipet below

main.tf

provider "aws" {
	profile = "default"
	region = "eu-west-2"
}

module "vpc_flow_logs" {
	source = "../cloudwatch"
	vpcflowlog-name = "VPCFlowLog"
	vpc-id = "vpc-xxxxx"
}

module "splunk-iam" {
	source = "../helpers/splunk"
	iam_user_name = "splunk"
}

module "config_service" {
	source = "../config"
	config-name = "aws-config-terraform"
	config-snapshot-freq = "Six_Hours"
	s3-bucket-name = "config-service"
	splunk-config-sqs-queue = "splunk-config-sqs-queue"
}

module "cloudtrail" {
	source = "../cloudtrail"
	s3-bucket-name-cloutrail = "cloudtrail-logs"
	s3-bucket-prefix-cloutrail = "ct"
	splunk-cloudtrail-sqs-queue = "splunk-cloudtrail-sqs-queue"
	trail-name = "splunk_trail"
}

Run

terraform init
terraform plan
terraform apply

Outputs

AWS credentials (key_id and key_secret) to be configured within Splunk Add-on for AWS:

• module.splunk_iam.splunk_iam_access_key_id
• value = module.splunk_iam.splunk_iam_access_key_secret

Splunk configuration

• In Splunk Add-on for AWS, on the Configration tab, add AWS account with Key ID and Key secret returned by the aws-monitoring-splunk-terraform script
• In Splunk Add-on for AWS, on the Inputs tab, configure Inputs:
  • AWS CloudWatch
  • AWS Config (Data type: Config)
  • AWS CloudTrail (Data type: CloudTrail)
  • AWS Desription