slve / cloud-function-custom-domain

This is a simple example to demonstrate how to create cloud function and more importantly to reach it out through a custom domain.

Goal

This is a simple example to demonstrate how to create cloud function and more importantly to reach it out through a custom domain.

Once https://issuetracker.google.com/issues/36155827?pli=1 is resolved the need to create all the wiring, like reserved ip, network endpoint group, backend service, url-map and forwarding rule would be obsolete; but up until then we are left with the solution described in https://cloud.google.com/load-balancing/docs/https/setting-up-https-serverless, whereas this example serves as a proof of concept.

Quick start

PROJECT_ID=... DNSZONE=... DNSNAME=... ./setup.sh

Note: Once the setup ran fine, you need to wait till the SSL certificate becomes active, which may easily take up to 15 minutes; plus maybe a minute or two before you will be able to successfully reach out your function.

curl your.custom.domain -iv

Custom function

rm -rf functions/
firebase init functions

Cleanup

./teardown.sh

References

• https://firebase.google.com/docs/functions/get-started
• https://cloud.google.com/load-balancing/docs/https/setting-up-https-serverless#gcloud_1

Further readings

• https://cloud.google.com/load-balancing/docs/negs/serverless-neg-concepts
• https://cloud.google.com/load-balancing/docs/negs/
• https://cloud.google.com/run/docs/mapping-custom-domains
• https://cloud.google.com/load-balancing/docs/https/ext-http-lb-tf-module-examples#cloud-run
• https://stackoverflow.com/questions/45850375/use-custom-domain-for-google-cloud-function