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ansible-collections-openstack
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ansible-collections-openstack/plugins/modules/router.py

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
DOCUMENTATION = '''
---
module: router
short_description: Create or delete routers from OpenStack
author: OpenStack Ansible SIG
description:
- Create or Delete routers from OpenStack. Although Neutron allows
routers to share the same name, this module enforces name uniqueness
to be more user friendly.
options:
enable_snat:
description:
- Enable Source NAT (SNAT) attribute.
type: bool
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_address). If no IP is specified,
one is automatically assigned from that subnet.
type: list
elements: dict
suboptions:
ip_address:
description: The fixed IP address to attempt to allocate.
type: str
aliases: ['ip']
subnet_id:
description: The subnet to attach the IP address to.
required: true
type: str
aliases: ['subnet']
external_gateway_info:
description:
- Information about the router's external gateway
type: dict
suboptions:
network:
description:
- Unique name or ID of the external gateway network.
- required I(interfaces) or I(enable_snat) are provided.
type: str
enable_snat:
description:
- Unique name or ID of the external gateway network.
- required I(interfaces) or I(enable_snat) are provided.
type: bool
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_address). If no IP is
specified, one is automatically assigned from that subnet.
type: list
elements: dict
suboptions:
ip_address:
description: The fixed IP address to attempt to allocate.
type: str
aliases: ['ip']
subnet_id:
description: The subnet to attach the IP address to.
required: true
type: str
aliases: ['subnet']
interfaces:
description:
- List of subnets to attach to the router internal interface. Default
gateway associated with the subnet will be automatically attached
with the router's internal interface.
In order to provide an ip address different from the default
gateway,parameters are passed as dictionary with keys as network
name or ID (I(net)), subnet name or ID (I(subnet)) and the IP of
port (I(portip)) from the network.
User defined portip is often required when a multiple router need
to be connected to a single subnet for which the default gateway has
been already used.
type: list
elements: raw
is_admin_state_up:
description:
- Desired admin state of the created or existing router.
type: bool
default: 'true'
aliases: ['admin_state_up']
name:
description:
- Name to be give to the router.
- This router attribute cannot be updated.
required: true
type: str
network:
description:
- Unique name or ID of the external gateway network.
- Required if I(external_fixed_ips) or I(enable_snat) are provided.
- This router attribute cannot be updated.
type: str
project:
description:
- Unique name or ID of the project.
- This router attribute cannot be updated.
type: str
state:
description:
- Indicate desired state of the resource
choices: ['present', 'absent']
default: present
type: str
extends_documentation_fragment:
- openstack.cloud.openstack
'''
EXAMPLES = '''
# Create a simple router, not attached to a gateway or subnets.
- openstack.cloud.router:
cloud: mycloud
state: present
name: simple_router
# Create a router, not attached to a gateway or subnets for a given project.
- openstack.cloud.router:
cloud: mycloud
state: present
name: simple_router
project: myproj
# Creates a router attached to ext_network1 on an IPv4 subnet and with one
# internal subnet interface.
- openstack.cloud.router:
cloud: mycloud
state: present
name: router1
network: ext_network1
external_fixed_ips:
- subnet: public-subnet
ip_address: 172.24.4.2
interfaces:
- private-subnet
# Create a router with two internal subnet interfaces and a user defined port
# ip and another with default gateway.
- openstack.cloud.router:
cloud: mycloud
state: present
name: router2
network: ext_network1
interfaces:
- net: private-net
subnet: private-subnet
portip: 10.1.1.10
- project-subnet
# Create a router with two internal subnet interface. One with user defined
# port ip and and another with default gateway.
- openstack.cloud.router:
cloud: mycloud
state: present
name: router2
network: ext_network1
interfaces:
- net: private-net
subnet: private-subnet
portip: 10.1.1.10
- project-subnet
# Create a router with two internal subnet interface. One with user defined
# port ip and and another with default gateway.
- openstack.cloud.router:
cloud: mycloud
state: present
name: router2
network: ext_network1
interfaces:
- net: private-net
subnet: private-subnet
portip: 10.1.1.10
- project-subnet
# Update existing router1 external gateway to include the IPv6 subnet.
# Note that since 'interfaces' is not provided, any existing internal
# interfaces on an existing router will be left intact.
- openstack.cloud.router:
cloud: mycloud
state: present
name: router1
network: ext_network1
external_fixed_ips:
- subnet: public-subnet
ip_address: 172.24.4.2
- subnet: ipv6-public-subnet
ip_address: 2001:db8::3
# Delete router1
- openstack.cloud.router:
cloud: mycloud
state: absent
name: router1
'''
RETURN = '''
router:
description: Dictionary describing the router.
returned: On success when I(state) is 'present'
type: dict
contains:
availability_zones:
description: Availability zones
returned: success
type: list
availability_zone_hints:
description: Availability zone hints
returned: success
type: list
created_at:
description: Date and time when the router was created
returned: success
type: str
description:
description: Description notes of the router
returned: success
type: str
external_gateway_info:
description: The external gateway information of the router.
returned: success
type: dict
sample: |
{
"enable_snat": true,
"external_fixed_ips": [
{
"ip_address": "10.6.6.99",
"subnet_id": "4272cb52-a456-4c20-8f3c-c26024ecfa81"
}
]
}
flavor_id:
description: ID of the flavor of the router
returned: success
type: str
id:
description: Unique UUID.
returned: success
type: str
sample: "474acfe5-be34-494c-b339-50f06aa143e4"
is_admin_state_up:
description: Network administrative state
returned: success
type: bool
is_distributed:
description: Indicates a distributed router.
returned: success
type: bool
is_ha:
description: Indicates a highly-available router.
returned: success
type: bool
name:
description: Name given to the router.
returned: success
type: str
sample: "router1"
project_id:
description: Project id associated with this router.
returned: success
type: str
revision_number:
description: Revision number
returned: success
type: int
routes:
description: The extra routes configuration for L3 router.
returned: success
type: list
status:
description: Router status.
returned: success
type: str
sample: "ACTIVE"
tags:
description: List of tags
returned: success
type: list
tenant_id:
description: Owner tenant ID
returned: success
type: str
updated_at:
description: Date of last update on the router
returned: success
type: str
'''
from ansible_collections.openstack.cloud.plugins.module_utils.openstack import OpenStackModule
from collections import defaultdict
class RouterModule(OpenStackModule):
external_fixed_ips_spec = dict(
type='list',
elements='dict',
options=dict(
ip_address=dict(aliases=["ip"]),
subnet_id=dict(required=True, aliases=["subnet"]),
))
argument_spec = dict(
enable_snat=dict(type='bool'),
external_fixed_ips=external_fixed_ips_spec,
external_gateway_info=dict(type='dict', options=dict(
network=dict(),
enable_snat=dict(type='bool'),
external_fixed_ips=external_fixed_ips_spec,
)),
interfaces=dict(type='list', elements='raw'),
is_admin_state_up=dict(type='bool',
default=True,
aliases=['admin_state_up']),
name=dict(required=True),
network=dict(),
project=dict(),
state=dict(default='present', choices=['absent', 'present']),
)
module_kwargs = dict(
mutually_exclusive=[
('external_gateway_info', 'network'),
('external_gateway_info', 'external_fixed_ips'),
('external_gateway_info', 'enable_snat'),
],
required_by={
'external_fixed_ips': 'network',
'enable_snat': 'network',
},
)
def _needs_update(self, router, kwargs, external_fixed_ips, to_add,
to_remove, missing_port_ids):
"""Decide if the given router needs an update."""
if router['is_admin_state_up'] != self.params['is_admin_state_up']:
return True
cur_ext_gw_info = router['external_gateway_info']
if 'external_gateway_info' in kwargs:
if cur_ext_gw_info is None:
# added external gateway info
return True
update = kwargs['external_gateway_info']
for attr in ('enable_snat', 'network_id'):
if attr in update and cur_ext_gw_info[attr] != update[attr]:
return True
cur_ext_gw_info = router['external_gateway_info']
cur_ext_fips = (cur_ext_gw_info or {}) \
.get('external_fixed_ips', [])
# map of external fixed ip subnets to addresses
cur_fip_map = defaultdict(set)
for p in cur_ext_fips:
if 'ip_address' in p:
cur_fip_map[p['subnet_id']].add(p['ip_address'])
req_fip_map = defaultdict(set)
if external_fixed_ips is not None:
# User passed expected external_fixed_ips configuration.
# Build map of requested ips/subnets.
for p in external_fixed_ips:
if 'ip_address' in p:
req_fip_map[p['subnet_id']].add(p['ip_address'])
# Check if external ip addresses need to be added
for fip in external_fixed_ips:
subnet = fip['subnet_id']
ip = fip.get('ip_address', None)
if subnet in cur_fip_map:
if ip is not None and ip not in cur_fip_map[subnet]:
# mismatching ip for subnet
return True
else:
# adding ext ip with subnet 'subnet'
return True
# Check if external ip addresses need to be removed.
for fip in cur_ext_fips:
subnet = fip['subnet_id']
ip = fip['ip_address']
if subnet in req_fip_map:
if ip not in req_fip_map[subnet]:
# removing ext ip with subnet (ip clash)
return True
else:
# removing ext ip with subnet
return True
# Check if internal interfaces need update
if to_add or to_remove or missing_port_ids:
# need to change interfaces
return True
return False
def _build_kwargs(self, router, network, ext_fixed_ips):
kwargs = {
'is_admin_state_up': self.params['is_admin_state_up'],
}
if not router:
kwargs['name'] = self.params['name']
# We cannot update a router name because name is used to find routers
# by name so only any router with an already matching name will be
# considered for updates
external_gateway_info = {}
if network:
external_gateway_info['network_id'] = network.id
# can't send enable_snat unless we have a network
if self.params['enable_snat'] is not None:
external_gateway_info['enable_snat'] = \
self.params['enable_snat']
if ext_fixed_ips:
external_gateway_info['external_fixed_ips'] = ext_fixed_ips
if external_gateway_info:
kwargs['external_gateway_info'] = external_gateway_info
if 'external_fixed_ips' not in external_gateway_info:
# no external fixed ips requested
# get current external fixed ips
curr_ext_gw_info = \
router['external_gateway_info'] if router else None
curr_ext_fixed_ips = \
curr_ext_gw_info.get('external_fixed_ips', []) \
if curr_ext_gw_info else []
if len(curr_ext_fixed_ips) > 1:
# but router has several external fixed ips
# keep first external fixed ip only
external_gateway_info['external_fixed_ips'] = [
curr_ext_fixed_ips[0]]
return kwargs
def _build_router_interface_config(self, filters):
# Undefine external_fixed_ips to have possibility to unset them
external_fixed_ips = None
internal_ports_missing = []
internal_ifaces = []
# Build external interface configuration
ext_fixed_ips = None
if self.params['external_gateway_info']:
ext_fixed_ips = self.params['external_gateway_info'] \
.get('external_fixed_ips')
ext_fixed_ips = ext_fixed_ips or self.params['external_fixed_ips']
if ext_fixed_ips:
# User passed external_fixed_ips configuration. Initialize ips list
external_fixed_ips = []
for iface in ext_fixed_ips:
subnet = self.conn.network.find_subnet(
iface['subnet_id'], ignore_missing=False, **filters)
fip = dict(subnet_id=subnet.id)
if 'ip_address' in iface:
fip['ip_address'] = iface['ip_address']
external_fixed_ips.append(fip)
# Build internal interface configuration
if self.params['interfaces']:
internal_ips = []
for iface in self.params['interfaces']:
if isinstance(iface, str):
subnet = self.conn.network.find_subnet(
iface, ignore_missing=False, **filters)
internal_ifaces.append(dict(subnet_id=subnet.id))
elif isinstance(iface, dict):
subnet = self.conn.network.find_subnet(
iface['subnet'], ignore_missing=False, **filters)
# TODO: We allow passing a subnet without specifing a
# network in case iface is a string, hence we
# should allow to omit the network here as well.
if 'net' not in iface:
self.fail(
"Network name missing from interface definition")
net = self.conn.network.find_network(iface['net'],
ignore_missing=False)
if 'portip' not in iface:
# portip not set, add any ip from subnet
internal_ifaces.append(dict(subnet_id=subnet.id))
elif not iface['portip']:
# portip is set but has invalid value
self.fail(msg='put an ip in portip or remove it'
'from list to assign default port to router')
else:
# portip has valid value
# look for ports whose fixed_ips.ip_address matchs
# portip
portip = iface['portip']
port_kwargs = ({'network_id': net.id}
if net is not None else {})
existing_ports = self.conn.network.ports(**port_kwargs)
for port in existing_ports:
for fip in port['fixed_ips']:
if (fip['subnet_id'] != subnet.id
or fip['ip_address'] != portip):
continue
# portip exists in net already
internal_ips.append(fip['ip_address'])
internal_ifaces.append(
dict(port_id=port.id,
subnet_id=subnet.id,
ip_address=portip))
if portip not in internal_ips:
# No port with portip exists
# hence create a new port
internal_ports_missing.append({
'network_id': subnet.network_id,
'fixed_ips': [{'ip_address': portip,
'subnet_id': subnet.id}]
})
return {
'external_fixed_ips': external_fixed_ips,
'internal_ports_missing': internal_ports_missing,
'internal_ifaces': internal_ifaces,
}
def _update_ifaces(self, router, to_add, to_remove, missing_ports):
for port in to_remove:
self.conn.network.remove_interface_from_router(
router, port_id=port.id)
# create ports that are missing
for port in missing_ports:
p = self.conn.network.create_port(**port)
if p:
to_add.append(dict(port_id=p.id))
for iface in to_add:
self.conn.network.add_interface_to_router(router, **iface)
def _get_external_gateway_network_name(self):
network_name_or_id = self.params['network']
if self.params['external_gateway_info']:
network_name_or_id = \
self.params['external_gateway_info']['network']
return network_name_or_id
def _get_port_changes(self, router, ifs_cfg):
requested_subnet_ids = [iface['subnet_id'] for iface
in ifs_cfg['internal_ifaces']]
router_ifs_internal = []
if router:
router_ifs_internal = self.conn.list_router_interfaces(
router, 'internal')
existing_subnet_ips = {}
for iface in router_ifs_internal:
if 'fixed_ips' not in iface:
continue
for fip in iface['fixed_ips']:
existing_subnet_ips[fip['subnet_id']] = (fip['ip_address'],
iface)
obsolete_subnet_ids = (set(existing_subnet_ips.keys())
- set(requested_subnet_ids))
internal_ifaces = ifs_cfg['internal_ifaces']
to_add = []
to_remove = []
for iface in internal_ifaces:
subnet_id = iface['subnet_id']
if subnet_id not in existing_subnet_ips:
iface.pop('ip_address', None)
to_add.append(iface)
continue
ip, existing_port = existing_subnet_ips[subnet_id]
if 'ip_address' in iface and ip != iface['ip_address']:
# Port exists for subnet but has the wrong ip. Schedule it for
# deletion
to_remove.append(existing_port)
for port in router_ifs_internal:
if 'fixed_ips' not in port:
continue
if any(fip['subnet_id'] in obsolete_subnet_ids
for fip in port['fixed_ips']):
to_remove.append(port)
return dict(to_add=to_add, to_remove=to_remove,
router_ifs_internal=router_ifs_internal)
def run(self):
state = self.params['state']
name = self.params['name']
network_name_or_id = self._get_external_gateway_network_name()
project_name_or_id = self.params['project']
if self.params['external_fixed_ips'] and not network_name_or_id:
self.fail(
msg='network is required when supplying external_fixed_ips')
query_filters = {}
project = None
project_id = None
if project_name_or_id is not None:
project = self.conn.identity.find_project(project_name_or_id,
ignore_missing=False)
project_id = project['id']
query_filters['project_id'] = project_id
router = self.conn.network.find_router(name, **query_filters)
network = None
if network_name_or_id:
# First try to find a network in the specified project.
network = self.conn.network.find_network(network_name_or_id,
**query_filters)
if not network:
# Fall back to a global search for the network.
network = self.conn.network.find_network(network_name_or_id,
ignore_missing=False)
# Validate and cache the subnet IDs so we can avoid duplicate checks
# and expensive API calls.
router_ifs_cfg = self._build_router_interface_config(query_filters)
missing_internal_ports = router_ifs_cfg['internal_ports_missing']
port_changes = self._get_port_changes(router, router_ifs_cfg)
to_add = port_changes['to_add']
to_remove = port_changes['to_remove']
router_ifs_internal = port_changes['router_ifs_internal']
external_fixed_ips = router_ifs_cfg['external_fixed_ips']
if self.ansible.check_mode:
# Check if the system state would be changed
if state == 'absent' and router:
changed = True
elif state == 'absent' and not router:
changed = False
elif state == 'present' and not router:
changed = True
else: # if state == 'present' and router
kwargs = self._build_kwargs(router, network,
external_fixed_ips)
changed = self._needs_update(
router, kwargs, external_fixed_ips, to_add, to_remove,
missing_internal_ports)
self.exit_json(changed=changed)
if state == 'present':
changed = False
external_fixed_ips = router_ifs_cfg['external_fixed_ips']
internal_ifaces = router_ifs_cfg['internal_ifaces']
kwargs = self._build_kwargs(router, network,
external_fixed_ips)
if not router:
changed = True
if project_id:
kwargs['project_id'] = project_id
router = self.conn.network.create_router(**kwargs)
self._update_ifaces(router, internal_ifaces, [],
missing_internal_ports)
else:
if self._needs_update(router, kwargs, external_fixed_ips,
to_add, to_remove,
missing_internal_ports):
changed = True
router = self.conn.network.update_router(router, **kwargs)
if to_add or to_remove or missing_internal_ports:
self._update_ifaces(router, to_add, to_remove,
missing_internal_ports)
self.exit_json(changed=changed,
router=router.to_dict(computed=False))
elif state == 'absent':
if not router:
self.exit_json(changed=False)
else:
# We need to detach all internal interfaces on a router
# before we will be allowed to delete it. Deletion can
# still fail if e.g. floating ips are attached to the
# router.
for port in router_ifs_internal:
self.conn.network.remove_interface_from_router(
router, port_id=port['id'])
self.conn.network.delete_router(router)
self.exit_json(changed=True)
def main():
module = RouterModule()
module()
if __name__ == '__main__':
main()
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