diff options
Diffstat (limited to 'nova')
| -rw-r--r-- | nova/network/linux_net.py | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/nova/network/linux_net.py b/nova/network/linux_net.py index 535ce87bc..0bcc36081 100644 --- a/nova/network/linux_net.py +++ b/nova/network/linux_net.py @@ -18,6 +18,7 @@ Implements vlans, bridges, and iptables rules using linux utilities. """ import os +import time from nova import db from nova import exception @@ -56,6 +57,8 @@ flags.DEFINE_bool('use_nova_chains', False, 'use the nova_ routing chains instead of default') flags.DEFINE_string('input_chain', 'INPUT', 'chain to add nova_input to') +flags.DEFINE_integer('dhcp_lease_time', 120, + 'Lifetime of a DHCP lease') flags.DEFINE_string('dns_server', None, 'if set, uses specific dns server for dnsmasq') @@ -273,8 +276,17 @@ def ensure_bridge(bridge, interface, net_attrs=None): _confirm_rule("FORWARD", "-j nova-local") +def get_dhcp_leases(context, network_id): + """Return a network's hosts config in dnsmasq leasefile format""" + hosts = [] + for fixed_ip_ref in db.network_get_associated_fixed_ips(context, + network_id): + hosts.append(_host_lease(fixed_ip_ref)) + return '\n'.join(hosts) + + def get_dhcp_hosts(context, network_id): - """Get a string containing a network's hosts config in dnsmasq format""" + """Get a string containing a network's hosts config in dhcp-host format""" hosts = [] for fixed_ip_ref in db.network_get_associated_fixed_ips(context, network_id): @@ -365,8 +377,19 @@ interface %s utils.get_my_linklocal(network_ref['bridge'])}) +def _host_lease(fixed_ip_ref): + """Return a host string for an address in leasefile format""" + instance_ref = fixed_ip_ref['instance'] + timestamp = time.mktime(instance_ref['updated_at'].timetuple()) + + return "%d %s %s %s" % (timestamp + FLAGS.dhcp_lease_time, + instance_ref['mac_address'], + instance_ref['hostname'], + fixed_ip_ref['address']) + + def _host_dhcp(fixed_ip_ref): - """Return a host string for an address""" + """Return a host string for an address in dhcp-host format""" instance_ref = fixed_ip_ref['instance'] return "%s,%s.%s,%s" % (instance_ref['mac_address'], instance_ref['hostname'], @@ -420,7 +443,8 @@ def _dnsmasq_cmd(net): ' --pid-file=%s' % _dhcp_file(net['bridge'], 'pid'), ' --listen-address=%s' % net['gateway'], ' --except-interface=lo', - ' --dhcp-range=%s,static,120s' % net['dhcp_start'], + ' --dhcp-range=%s,static,%ds' % (net['dhcp_start'], + FLAGS.dhcp_lease_time), ' --dhcp-hostsfile=%s' % _dhcp_file(net['bridge'], 'conf'), ' --dhcp-script=%s' % FLAGS.dhcpbridge, ' --leasefile-ro'] |