Daily backup of OpenSearch domains with AWS Lambda

This repo contains a simple Terraform program for provisioning a Lambda function which takes daily snapshots of a previously created managed OpenSearch database on AWS.

In order to run this code, you need to have a pre-existing VPC and OpenSearch domain in your AWS infrastructure and then create a terraform.tfvars file containing the following mandatory variables:

# The ID of the VPC where the Lambda function will be provisioned
vpc_id = "<my_vpc_id>

# A list of subnets IDs within a VPC where the Lambda function will be provisioned
vpc_subnets = <my_vpc_subnets>

# The ARN of the OpenSearch domain to backup
es_domain_arn = <my_domain_arn>

# The hostname of the OpenSearch domain to backup
# without neither the `https://` in front nor the trailing `/`
es_domain_host = <my_domain_host_url>

After that, you can provision the Lambda using the standard Terraform workflow:

terraform init
terraform apply -auto-approve

More information can be found in this blogpost.