Added DNSmasq ability for RA
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parent
8888f5d9f7
commit
0982927c1b
2 changed files with 40 additions and 6 deletions
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@ -54,8 +54,10 @@ def main(arguments):
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vb._route_network()
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if arguments['run_dns_ra']:
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if not arguments['network']:
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raise UncloudException("Providing DNS/RAs requires a /64 IPv6 network. You can use fd00::/64 for testing (non production!)")
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if not arguments['network'] or not arguments['vni']:
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raise UncloudException("Providing DNS/RAs requires a /64 IPv6 network and a VNI. You can use fd00::/64 and vni=1 for testing (non production!)")
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dnsra = DNSRA(arguments['network'])
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dnsra.setup()
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dnsra = DNSRA(route=arguments['network'],
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vni=arguments['vni'],
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use_sudo=arguments['use_sudo'])
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dnsra._setup_dnsmasq()
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@ -77,9 +77,41 @@ class ManagementBridge(VXLANBridge):
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class DNSRA(object):
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def __init__(self):
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pass
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# VXLAN ids are at maximum 24 bit
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max_vni = (2**24)-1
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# Command to start dnsmasq
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cmd_start_dnsmasq="{sudo}dnsmasq --interface={bridgedev} --bind-interfaces --dhcp-range={route},ra-only,infinite --enable-ra"
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def __init__(self,
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vni,
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route=None,
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use_sudo=False):
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self.config = {}
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if vni > self.max_vni:
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raise UncloudException("VNI must be in the range of 0 .. {}".format(self.max_vni))
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if use_sudo:
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self.config['sudo'] = 'sudo '
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#TODO: remove if not needed
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#self.config['vni_dec'] = vni
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self.config['vni_hex'] = "{:x}".format(vni)
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# dnsmasq only wants the network without the prefix, therefore, cut it off
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self.config['route'] = ipaddress.IPv6Network(route).network_address
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self.config['bridgedev'] = "br{}".format(self.config['vni_hex'])
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def _setup_dnsmasq(self):
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self._execute_cmd(self.cmd_start_dnsmasq)
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def _execute_cmd(self, cmd_string, **kwargs):
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cmd = cmd_string.format(**self.config, **kwargs)
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log.info("Executing: {}".format(cmd))
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print("Executing: {}".format(cmd))
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subprocess.run(cmd.split())
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class Firewall(object):
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pass
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