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Rewrite DNSAggregatorInstance to handle DNS well

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Trying to directly AXFR from dnsmasq is a mess, since their zone is
barely compliant with spec, it doesn't support notifies, and it is
generally really messy.

This implements an advanced "AXFR parser" system, which looks at the
results of an AXFR from the local dnsmasq instances per-network, and
updates the real replicated MariaDB pdns backend cluster with the
changed data. This allows a sensible, transferable zone with its own
SOA that is dynamically reconfigured as hosts come and go from the
dnsmasq zone.
This commit is contained in:
Joshua Boniface
2018-11-18 15:36:54 -05:00
parent b1d0b6e62f
commit 1f58d61cb0
5 changed files with 387 additions and 146 deletions
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16
node-daemon/pvcd/NodeInstance.py
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@ -245,30 +245,22 @@ class NodeInstance(object):
self.logger.out('Setting router {} to secondary state'.format(self.name), state='i')
self.logger.out('Network list: {}'.format(', '.join(self.network_list)))
time.sleep(1)
self.dns_aggregator.stop_aggregator()
for network in self.d_network:
self.d_network[network].stopDHCPServer()
self.d_network[network].removeGateway4Address()
self.d_network[network].removeGateway6Address()
self.dns_aggregator.remove_client_network(network)
self.dns_aggregator.stop_aggregator()
self.d_network[network].removeGateways()
self.removeFloatingAddresses()
def become_primary(self):
self.logger.out('Setting router {} to primary state.'.format(self.name), state='i')
self.logger.out('Network list: {}'.format(', '.join(self.network_list)))
self.createFloatingAddresses()
self.dns_aggregator.start_aggregator()
time.sleep(0.5)
# Start up the gateways and DHCP servers
for network in self.d_network:
self.dns_aggregator.add_client_network(network)
self.d_network[network].createGateway4Address()
self.d_network[network].createGateway6Address()
self.d_network[network].createGateways()
self.d_network[network].startDHCPServer()
time.sleep(0.5)
# Handle AXFRs after to avoid slowdowns
for network in self.d_network:
self.dns_aggregator.get_axfr(network)
self.dns_aggregator.start_aggregator()
def createFloatingAddresses(self):
# VNI floating IP