dns_forwarding_statistics.py
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dns_forwarding_statistics.py
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	#!/usr/bin/env python3

	import jinja2
	from sys import exit

	from vyos.config import Config
	from vyos.utils.process import cmd

	PDNS_CMD='/usr/bin/rec_control --socket-dir=/run/powerdns'

	OUT_TMPL_SRC = """
	DNS forwarding statistics:

	Cache entries: {{ cache_entries }}
	Cache size: {{ cache_size }} kbytes

	"""

	if __name__ == '__main__':
	# Do nothing if service is not configured
	c = Config()
	if not c.exists_effective('service dns forwarding'):
	print("DNS forwarding is not configured")
	exit(0)

	data = {}

	data['cache_entries'] = cmd(f'{PDNS_CMD} get cache-entries')
	data['cache_size'] = "{0:.2f}".format( int(cmd(f'{PDNS_CMD} get cache-bytes')) / 1024 )

	tmpl = jinja2.Template(OUT_TMPL_SRC)
	print(tmpl.render(data))