Using OctoDNS To Update DNS

Install OctoDNS

sudo apt install python3-venv  && \
mkdir -p /home/sympl/dns && \
python3 -m venv /home/sympl/dns/ && \
/home/sympl/dns/bin/pip3 install pip octodns

Create config file

Sample configuration file

---

providers:
 config_example.com:
   class: octodns.source.tinydns.TinyDnsFileSource
   directory: /srv/example.com/config/dns
   default_ttl: 3600

 config_subdomain1.example.com:
   class: octodns.source.tinydns.TinyDnsFileSource
   directory: /srv/subdomain1.example.com/config/dns
   default_ttl: 3600

 config_subdomain2.example.com:
   class: octodns.source.tinydns.TinyDnsFileSource
   directory: /srv/subdomain2.example.com/config/dns
   default_ttl: 3600

 mythicbeasts:
   class: octodns.provider.mythicbeasts.MythicBeastsProvider
   passwords:
     example.com.: 'mythicdnsapipasswordgoeshere'

zones:
 example.com.:
   sources:
     - config_example.com
     - config_subdomain1.example.com
     - config_subdomain2.example.com

   targets:
     - mythicbeasts

Cleanup published changes to remove DNS entries

Add the following cleanup script /home/sympl/dns-cleanup.py

#!/usr/bin/python3

import requests
from pprint import pprint

from yaml import load, dump
try:
   from yaml import load, CLoader as Loader, CDumper as Dumper
except ImportError:
   from yaml import Loader, Dumper

def doRequest(values):
   response = requests.post(url, data = values)
   responseContents = response.text
   return responseContents

with open('/home/sympl/dns.yaml', 'r') as yamlfile:
   yamldoc = load(yamlfile)

#pprint(yamldoc)

url = 'https://dnsapi.mythic-beasts.com/'

for domain in yamldoc['providers']['mythicbeasts']['passwords'].keys():

   yourDomain = domain.strip("'").rstrip(".")
   yourDomainAPIPass = yamldoc['providers']['mythicbeasts']['passwords'][domain].strip("'")

   print("Cleaning up '" + yourDomain + "'")

   values = {
       'domain'   : yourDomain,
       'password' : yourDomainAPIPass,
       'command'  : 'LIST'
   }

   responseContents=doRequest(values)

   toDelete = False
   values['command']=[]

   for line in responseContents.splitlines():
       elements = line.split()
       if elements[2]=="NS" and "ns.bytemark.co.uk." in elements[3]:
           toDelete=True
           values['command'].append("DELETE " + line)

   if toDelete:
       responseContents=doRequest(values)
       print(responseContents)
   else:
       print("Nothing to delete")

Update Bytemark upload file

Add the following to /root/BytemarkDNS/upload immediately before the exit 0 line at the end.

# BEGIN Run OctoDNS and clean up
. /home/sympl/dns/bin/activate
PATH=$PATH:/home/sympl/dns/bin
octodns-sync --config-file=/home/sympl/dns.yaml --doit --force
/home/sympl/dns-cleanup.py
# END Run OctoDNS and clean up

Now, whenever sympl-dns-generate is run, it will upload changes using the Mythic Beasts API. When creating new domains, update the configuration file and then manually run sympl-dns-generate.