ddns

DDNS

Implements an equivalent of DynDNS using AWS API Gateway and Lambda to update DNS managed in AWS Route53

Building & Deploying

Prerequisites

• Go https://golang.org/dl/
• Hashicorp terraform https://www.terraform.io/
• AWS Account which is authoritative for the zone(s) that contain the DNS records to be updated

There are two Lambda functions to build and then apply terraform to deploy the functions and create the API gateway configuration

Run the following commands. You will be prompted for your AWS access keys and secret keys, and a username and password that will be used to secure requests to the API.

cd deploy && \
GOARCH=arm64 GOOS=linux go build -tags lambda.norpc -o bootstrap ../authorizer/basicauth.go && \
zip ./auth.zip bootstrap && \
GOARCH=arm64 GOOS=linux go build -tags lambda.norpc -o bootstrap ../update/update.go && \
zip ./ddns.zip bootstrap && \
terraform apply

Destroying Everything Manually

• API Gateway:
  • ddns
• Lambda Functions:
  • ddns
  • api_basic_auth
• SSM
  • Parameter: /ddns/password
• CloudWatch
  • Log Groups:
    • /aws/lambda/ddns
    • /aws/lambda/api_basic_auth
• IAM
  • IAM Roles:
    • ddns_lambda
    • api_basic_auth_lambda
    • api_gateway_auth_invocation
  • IAM Policies:
    • ddns_lambda_policy
    • api_basic_auth_lambda_policy
    • api_gateway_auth_invocation