AWS Internal Healthcheck

Perform healthchecks on private IP or private FQDN (Private Route53). Healthchecks status are pushed to Cloudwatch custom metrics.

Parachute Health modified from original source.

Setup

AWS Route53 healthchecks cannot target private endpoint within a private VPC. This lambda function will try to perform an healthcheck and send metrics to Cloudwatch. Metric value will be:

• 1 for Healthcheck OK
• 0 for Healthcheck Not OK
• none if no healthcheck has been performed (if this lambda failed to run)

Once this healthcheck metrics are in Cloudwatch, it's up to you to:

• Schedule it (using Cloudwatch Events)
• Configure an Alert (using Cloudwatch Alerts)

Configuration

Env Variable	Default	Description
PROTOCOL	http	http or https
HOSTNAME	localhost	Hostname or IP address
PORT	80	Port to test
URL_PATH	/	Path to test
CA_CERT_PATH	internal.crt	Filesystem path to CA root cert
METRIC_NAME	MyService	Name of the Cloudwatch metrics
METRIC_ENVIRONMENT	production	Environment name to separate Cloudwatch metrics
METRIC_NAMESPACE	HealthCheck	Namespace of the Cloudwatch Metric