Dreamhost Certbot DNS hook example

certbot-auth-hook.py

import requests, uuid, json, os, time
DREAMHOST_KEY = '<dreamhost API key>';
   
#----------------------------------------------------------------------------------------
def dh_request( **kwargs ):
   params = kwargs
   params["key"]       = DREAMHOST_KEY
   params["unique_id"] = str(uuid.uuid4())
   params["format"]    = "json"
   return json.loads(
      requests.get("https://api.dreamhost.com/", params = params).text )

#----------------------------------------------------------------------------------------
def update_dreamhost_dns( name, dnstype, value ):
   print( "Querying records from dreamhost." )
   records = dh_request( cmd="dns-list_records" )
   for record in records["data"]:
      if record["record"] == name and record["type"] == dnstype:
         print( record )
         if record["value"] == value:
            print( f"{name} is already up to date." )
            return
         print( "Removing existing record." )
         result = dh_request(
            cmd    = "dns-remove_record",
            record = name,
            type   = dnstype,
            value  = record["value"] )
            
         print( result )
         break

   print( "Adding record." )
   result = dh_request(
      cmd    = "dns-add_record",
      record = name,
      type   = dnstype,
      value  = value )
   print( result )
   
certbot_domain = os.environ.get("CERTBOT_DOMAIN")
certbot_validation = os.environ.get("CERTBOT_VALIDATION")
print("Domain:", certbot_domain)
print("Validation string:", certbot_validation)

if certbot_domain == "mukunda.com":
   update_dreamhost_dns( "_acme-challenge.mukunda.com", "TXT", certbot_validation )
   print("Sleeping for 10 minutes to allow DNS to propagate.")
   time.sleep(600)
else:
   print("Unhandled domain:", certbot_domain);