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Fix os_router to accept internal interfaces

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Allow the 'interfaces' attribute to represent internal router
interfaces, composed of subnet names, and the 'external_fixed_ips'
attribute to represent external interface subnet/IP.
This commit is contained in:
David Shrewsbury 2015-10-19 15:53:15 -04:00
parent 84b1a1a2b7
commit 55e9dc73f5
1 changed files with 103 additions and 45 deletions
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148
cloud/openstack/os_router.py
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@ -58,12 +58,17 @@ options:
required: true when I(interfaces) or I(enable_snat) are provided, required: true when I(interfaces) or I(enable_snat) are provided,
false otherwise. false otherwise.
default: None default: None
external_fixed_ips:
description:
- The IP address parameters for the external gateway network. Each
is a dictionary with the subnet name or ID (subnet) and the IP
address to assign on the subnet (ip). If no IP is specified,
one is automatically assigned from that subnet.
required: false
default: None
interfaces: interfaces:
description: description:
- List of subnets to attach to the router. Each is a dictionary with - List of subnets to attach to the router internal interface.
the subnet name or ID (subnet) and the IP address to assign on that
subnet (ip). If no IP is specified, one is automatically assigned from
that subnet.
required: false required: false
default: None default: None
requirements: ["shade"] requirements: ["shade"]
@ -76,28 +81,32 @@ EXAMPLES = '''
state: present state: present
name: simple_router name: simple_router
# Creates a router attached to ext_network1 and one subnet interface. # Creates a router attached to ext_network1 on an IPv4 subnet and one
# An IP address from subnet1's IP range will automatically be assigned # internal subnet interface.
# to that interface.
- os_router: - os_router:
cloud: mycloud cloud: mycloud
state: present state: present
name: router1 name: router1
network: ext_network1 network: ext_network1
external_fixed_ips:
- subnet: public-subnet
ip: 172.24.4.2
interfaces: interfaces:
- subnet: subnet1 - private-subnet
# Update existing router1 to include subnet2 (10.5.5.0/24), specifying # Update existing router1 external gateway to include the IPv6 subnet.
# the IP address within subnet2's IP range we'd like for that interface. # Note that since 'interfaces' is not provided, any existing internal
# interfaces on an existing router will be left intact.
- os_router: - os_router:
cloud: mycloud cloud: mycloud
state: present state: present
name: router1 name: router1
network: ext_network1 network: ext_network1
interfaces: external_fixed_ips:
- subnet: subnet1 - subnet: public-subnet
- subnet: subnet2 ip: 172.24.4.2
ip: 10.5.5.1 - subnet: ipv6-public-subnet
ip: 2001:db8::3
# Delete router1 # Delete router1
- os_router: - os_router:
@ -150,44 +159,54 @@ router:
''' '''
def _needs_update(cloud, module, router, network): def _needs_update(cloud, module, router, network, internal_subnet_ids):
"""Decide if the given router needs an update. """Decide if the given router needs an update.
""" """
if router['admin_state_up'] != module.params['admin_state_up']: if router['admin_state_up'] != module.params['admin_state_up']:
return True return True
if router['external_gateway_info']['enable_snat'] != module.params['enable_snat']: if router['external_gateway_info'].get('enable_snat', True) != module.params['enable_snat']:
return True return True
if network: if network:
if router['external_gateway_info']['network_id'] != network['id']: if router['external_gateway_info']['network_id'] != network['id']:
return True return True
# check subnet interfaces # check external interfaces
for new_iface in module.params['interfaces']: if module.params['external_fixed_ips']:
subnet = cloud.get_subnet(new_iface['subnet']) for new_iface in module.params['external_fixed_ips']:
if not subnet: subnet = cloud.get_subnet(new_iface['subnet'])
module.fail_json(msg='subnet %s not found' % new_iface['subnet']) exists = False
exists = False
# compare the requested interface with existing, looking for an existing match # compare the requested interface with existing, looking for an existing match
for existing_iface in router['external_gateway_info']['external_fixed_ips']: for existing_iface in router['external_gateway_info']['external_fixed_ips']:
if existing_iface['subnet_id'] == subnet['id']: if existing_iface['subnet_id'] == subnet['id']:
if 'ip' in new_iface: if 'ip' in new_iface:
if existing_iface['ip_address'] == new_iface['ip']: if existing_iface['ip_address'] == new_iface['ip']:
# both subnet id and ip address match # both subnet id and ip address match
exists = True
break
else:
# only the subnet was given, so ip doesn't matter
exists = True exists = True
break break
else:
# only the subnet was given, so ip doesn't matter
exists = True
break
# this interface isn't present on the existing router # this interface isn't present on the existing router
if not exists: if not exists:
return True
# check internal interfaces
if module.params['interfaces']:
existing_subnet_ids = []
for port in cloud.list_router_interfaces(router, 'internal'):
if 'fixed_ips' in port:
for fixed_ip in port['fixed_ips']:
existing_subnet_ids.append(fixed_ip['subnet_id'])
if set(internal_subnet_ids) != set(existing_subnet_ids):
return True return True
return False return False
def _system_state_change(cloud, module, router, network): def _system_state_change(cloud, module, router, network, internal_ids):
"""Check if the system state would be changed.""" """Check if the system state would be changed."""
state = module.params['state'] state = module.params['state']
if state == 'absent' and router: if state == 'absent' and router:
@ -195,7 +214,7 @@ def _system_state_change(cloud, module, router, network):
if state == 'present': if state == 'present':
if not router: if not router:
return True return True
return _needs_update(cloud, module, router, network) return _needs_update(cloud, module, router, network, internal_ids)
return False return False
def _build_kwargs(cloud, module, router, network): def _build_kwargs(cloud, module, router, network):
@ -213,12 +232,10 @@ def _build_kwargs(cloud, module, router, network):
# can't send enable_snat unless we have a network # can't send enable_snat unless we have a network
kwargs['enable_snat'] = module.params['enable_snat'] kwargs['enable_snat'] = module.params['enable_snat']
if module.params['interfaces']: if module.params['external_fixed_ips']:
kwargs['ext_fixed_ips'] = [] kwargs['ext_fixed_ips'] = []
for iface in module.params['interfaces']: for iface in module.params['external_fixed_ips']:
subnet = cloud.get_subnet(iface['subnet']) subnet = cloud.get_subnet(iface['subnet'])
if not subnet:
module.fail_json(msg='subnet %s not found' % iface['subnet'])
d = {'subnet_id': subnet['id']} d = {'subnet_id': subnet['id']}
if 'ip' in iface: if 'ip' in iface:
d['ip_address'] = iface['ip'] d['ip_address'] = iface['ip']
@ -226,6 +243,25 @@ def _build_kwargs(cloud, module, router, network):
return kwargs return kwargs
def _validate_subnets(module, cloud):
external_subnet_ids = []
internal_subnet_ids = []
if module.params['external_fixed_ips']:
for iface in module.params['external_fixed_ips']:
subnet = cloud.get_subnet(iface['subnet'])
if not subnet:
module.fail_json(msg='subnet %s not found' % iface['subnet'])
external_subnet_ids.append(subnet['id'])
if module.params['interfaces']:
for iface in module.params['interfaces']:
subnet = cloud.get_subnet(iface)
if not subnet:
module.fail_json(msg='subnet %s not found' % iface)
internal_subnet_ids.append(subnet['id'])
return (external_subnet_ids, internal_subnet_ids)
def main(): def main():
argument_spec = openstack_full_argument_spec( argument_spec = openstack_full_argument_spec(
state=dict(default='present', choices=['absent', 'present']), state=dict(default='present', choices=['absent', 'present']),
@ -233,7 +269,8 @@ def main():
admin_state_up=dict(type='bool', default=True), admin_state_up=dict(type='bool', default=True),
enable_snat=dict(type='bool', default=True), enable_snat=dict(type='bool', default=True),
network=dict(default=None), network=dict(default=None),
interfaces=dict(type='list', default=None) interfaces=dict(type='list', default=None),
external_fixed_ips=dict(type='list', default=None),
) )
module_kwargs = openstack_module_kwargs() module_kwargs = openstack_module_kwargs()
@ -248,8 +285,8 @@ def main():
name = module.params['name'] name = module.params['name']
network = module.params['network'] network = module.params['network']
if module.params['interfaces'] and not network: if module.params['external_fixed_ips'] and not network:
module.fail_json(msg='network is required when supplying interfaces') module.fail_json(msg='network is required when supplying external_fixed_ips')
try: try:
cloud = shade.openstack_cloud(**module.params) cloud = shade.openstack_cloud(**module.params)
@ -261,9 +298,13 @@ def main():
if not net: if not net:
module.fail_json(msg='network %s not found' % network) module.fail_json(msg='network %s not found' % network)
# Validate and cache the subnet IDs so we can avoid duplicate checks
# and expensive API calls.
external_ids, internal_ids = _validate_subnets(module, cloud)
if module.check_mode: if module.check_mode:
module.exit_json( module.exit_json(
changed=_system_state_change(cloud, module, router, net) changed=_system_state_change(cloud, module, router, net, internal_ids)
) )
if state == 'present': if state == 'present':
@ -272,11 +313,23 @@ def main():
if not router: if not router:
kwargs = _build_kwargs(cloud, module, router, net) kwargs = _build_kwargs(cloud, module, router, net)
router = cloud.create_router(**kwargs) router = cloud.create_router(**kwargs)
for internal_subnet_id in internal_ids:
cloud.add_router_interface(router, subnet_id=internal_subnet_id)
changed = True changed = True
else: else:
if _needs_update(cloud, module, router, net): if _needs_update(cloud, module, router, net, internal_ids):
kwargs = _build_kwargs(cloud, module, router, net) kwargs = _build_kwargs(cloud, module, router, net)
router = cloud.update_router(**kwargs) router = cloud.update_router(**kwargs)
# On a router update, if any internal interfaces were supplied,
# just detach all existing internal interfaces and attach the new.
if internal_ids:
ports = cloud.list_router_interfaces(router, 'internal')
for port in ports:
cloud.remove_router_interface(router, port_id=port['id'])
for internal_subnet_id in internal_ids:
cloud.add_router_interface(router, subnet_id=internal_subnet_id)
changed = True changed = True
module.exit_json(changed=changed, router=router) module.exit_json(changed=changed, router=router)
@ -285,6 +338,11 @@ def main():
if not router: if not router:
module.exit_json(changed=False) module.exit_json(changed=False)
else: else:
# We need to detach all internal interfaces on a router before
# we will be allowed to delete it.
ports = cloud.list_router_interfaces(router, 'internal')
for port in ports:
cloud.remove_router_interface(router, port_id=port['id'])
cloud.delete_router(name) cloud.delete_router(name)
module.exit_json(changed=True) module.exit_json(changed=True)