jonpulsifer / go-check-dns

Google Cloud DNS domain expiration checker thingy

go-check-dns

This is a little whois thingy I made to track my domain name expirations in datadog.

My domains are hosted with Google Cloud DNS so it expects GOOGLE_APPLICATION_CREDENTIALS to be /path/to/service-account.json to fetch the managed domains.

It also expects DATADOG_URL to be set in ENV

Ref: https://cloud.google.com/compute/docs/access/service-accounts to learn about service accounts

WARNING 🔥

Cron support will be dropped as soon as kubernetes cronjobs leave alpha on GKE. See kubernetes/enhancements#19 for details

Configuration

Edit crontab with the GCP or script you want to run

Kubernetes

@kelseyhightower has a great tutorial for service accounts: https://github.com/kelseyhightower/gke-service-accounts-tutorial

Usage:

# exported variable
export DATADOG_URL=datadog.kube-public.svc.cluster.local:8125
./go-check-dns -project kubesec

# runtime variable
DATADOG_URL=127.0.0.1:8125 ./go-check-dns -project kubesec

# or use make for 127.0.0.1:8125 and specify a runtime gcp project
PROJECT=kubesec make run

Credits:

Thanks to https://github.com/muchlearning/kubernetes-cron for cronspiration

go-check-dns's Issues

whois.nic.sucks query errors

Too many queries.

I wasn't running into this limitation during development but deployed on GKE this errors out with too many queries. I adjusted the cron to be weekly so I hope this works? I can't seem to find any reliable documentation around the query quotas so /shrug

http://whois.nic.sucks/

Incorrect error type in main.go

If a metric failed to submit this would kill the entire run. This should probably be a log.Errorf

https://github.com/JonPulsifer/go-check-dns/blob/master/main.go#L87