Added DNSmasq ability for RA

This commit is contained in:
Dominique Roux 2020-01-23 18:43:41 +01:00
parent 8888f5d9f7
commit 0982927c1b
2 changed files with 40 additions and 6 deletions

View file

@ -54,8 +54,10 @@ def main(arguments):
vb._route_network() vb._route_network()
if arguments['run_dns_ra']: if arguments['run_dns_ra']:
if not arguments['network']: if not arguments['network'] or not arguments['vni']:
raise UncloudException("Providing DNS/RAs requires a /64 IPv6 network. You can use fd00::/64 for testing (non production!)") 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!)")
dnsra = DNSRA(arguments['network']) dnsra = DNSRA(route=arguments['network'],
dnsra.setup() vni=arguments['vni'],
use_sudo=arguments['use_sudo'])
dnsra._setup_dnsmasq()

View file

@ -77,9 +77,41 @@ class ManagementBridge(VXLANBridge):
class DNSRA(object): class DNSRA(object):
def __init__(self): # VXLAN ids are at maximum 24 bit
pass max_vni = (2**24)-1
# Command to start dnsmasq
cmd_start_dnsmasq="{sudo}dnsmasq --interface={bridgedev} --bind-interfaces --dhcp-range={route},ra-only,infinite --enable-ra"
def __init__(self,
vni,
route=None,
use_sudo=False):
self.config = {}
if vni > self.max_vni:
raise UncloudException("VNI must be in the range of 0 .. {}".format(self.max_vni))
if use_sudo:
self.config['sudo'] = 'sudo '
#TODO: remove if not needed
#self.config['vni_dec'] = vni
self.config['vni_hex'] = "{:x}".format(vni)
# dnsmasq only wants the network without the prefix, therefore, cut it off
self.config['route'] = ipaddress.IPv6Network(route).network_address
self.config['bridgedev'] = "br{}".format(self.config['vni_hex'])
def _setup_dnsmasq(self):
self._execute_cmd(self.cmd_start_dnsmasq)
def _execute_cmd(self, cmd_string, **kwargs):
cmd = cmd_string.format(**self.config, **kwargs)
log.info("Executing: {}".format(cmd))
print("Executing: {}".format(cmd))
subprocess.run(cmd.split())
class Firewall(object): class Firewall(object):
pass pass