mirror of
https://github.com/Luzifer/dns.git
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109 lines
2.2 KiB
Python
109 lines
2.2 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import difflib
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import hashlib
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import os
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import os.path
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import subprocess
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import sys
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import time
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# Custom modules
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import consul
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# Third-party imports
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import jinja2
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import requests
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import yaml
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rndc_queue = []
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def call_rndc(params):
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command = ["rndc"]
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command.extend(params)
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if 'DEBUG' in os.environ and os.environ['DEBUG'] == 'true':
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print('DBG: Call "{}"'.format(" ".join(command)))
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else:
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subprocess.check_call(command, stdout=sys.stdout, stderr=sys.stderr)
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def diff_files(file1, file2):
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fromlines = []
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tolines = []
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if os.path.isfile(file1):
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with open(file1) as ff:
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fromlines = ff.readlines()
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if os.path.isfile(file2):
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with open(file2) as tf:
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tolines = tf.readlines()
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print(''.join(difflib.unified_diff(
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fromlines, tolines, file1, file2)))
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def exec_rndc_queue():
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global rndc_queue
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for params in rndc_queue:
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call_rndc(params)
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rndc_queue = []
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def hash_file(filename):
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if not os.path.isfile(filename):
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return ""
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hasher = hashlib.sha1()
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with open(filename, 'r') as afile:
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lines = afile.readlines()
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hasher.update(''.join(lines).encode('utf-8'))
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return hasher.hexdigest()
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def queue_rndc_call(params):
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global rndc_queue
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rndc_queue.append(params)
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def write_named_conf(zones):
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tpl = jinja2.Template(open("named.conf").read())
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zone_content = tpl.render({
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"zones": zones,
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})
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with open("zones/named.conf.new", "w") as f:
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f.write(zone_content)
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if hash_file("zones/named.conf.new") != hash_file("zones/named.conf"):
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print("Generated and replaced named.conf")
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diff_files("zones/named.conf", "zones/named.conf.new")
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os.rename("zones/named.conf.new", "zones/named.conf")
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queue_rndc_call(['reconfig'])
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else:
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os.unlink("zones/named.conf.new")
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def healthcheck():
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if os.getenv('HC_PING') is not None:
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requests.get(os.getenv('HC_PING'))
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def main():
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consul_zones = consul.get_zones()
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write_named_conf(consul_zones)
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exec_rndc_queue()
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healthcheck()
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if __name__ == "__main__":
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main()
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