491 lines
16 KiB
Python
491 lines
16 KiB
Python
#!/usr/bin/python
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#
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DOCUMENTATION = '''
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---
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module: nxos_evpn_vni
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version_added: "2.2"
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short_description: Manages Cisco EVPN VXLAN Network Identifier (VNI).
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description:
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- Manages Cisco Ethernet Virtual Private Network (EVPN) VXLAN Network
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Identifier (VNI) configurations of a Nexus device.
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author: Gabriele Gerbino (@GGabriele)
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extends_documentation_fragment: nxos
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notes:
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- default, where supported, restores params default value.
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- RD override is not permitted. You should set it to the defalt values
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first and then reconfigure it.
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- C(route_target_both), C(route_target_import) and
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C(route_target_export valid) values are a list of extended communities,
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(i.e. ['1.2.3.4:5', '33:55']) or the keywords 'auto' or 'default'.
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- The C(route_target_both) property is discouraged due to the inconsistent
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behavior of the property across Nexus platforms and image versions.
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For this reason it is recommended to use explicit C(route_target_export)
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and C(route_target_import) properties instead of C(route_target_both).
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- RD valid values are a string in one of the route-distinguisher formats,
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the keyword 'auto', or the keyword 'default'.
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options:
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vni:
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description:
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- The EVPN VXLAN Network Identifier.
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required: true
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default: null
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route_distinguisher:
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description:
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- The VPN Route Distinguisher (RD). The RD is combined with
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the IPv4 or IPv6 prefix learned by the PE router to create a
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globally unique address.
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required: true
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default: null
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route_target_both:
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description:
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- Enables/Disables route-target settings for both import and
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export target communities using a single property.
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required: false
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default: null
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route_target_import:
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description:
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- Sets the route-target 'import' extended communities.
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required: false
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default: null
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route_target_export:
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description:
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- Sets the route-target 'import' extended communities.
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required: false
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default: null
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state:
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description:
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- Determines whether the config should be present or not
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on the device.
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required: false
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default: present
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choices: ['present','absent']
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'''
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EXAMPLES = '''
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- nxos_evpn_vni:
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vni: 6000
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route_distinguisher: "60:10"
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route_target_import:
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- "5000:10"
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- "4100:100"
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route_target_export: auto
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route_target_both: default
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username: "{{ un }}"
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password: "{{ pwd }}"
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host: "{{ inventory_hostname }}"
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'''
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RETURN = '''
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proposed:
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description: k/v pairs of parameters passed into module
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returned: verbose mode
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type: dict
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sample: {"route_target_import": ["5000:10", "4100:100",
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"5001:10"],"vni": "6000"}
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existing:
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description: k/v pairs of existing EVPN VNI configuration
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returned: verbose mode
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type: dict
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sample: {"route_distinguisher": "70:10", "route_target_both": [],
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"route_target_export": [], "route_target_import": [
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"4100:100", "5000:10"], "vni": "6000"}
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end_state:
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description: k/v pairs of EVPN VNI configuration after module execution
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returned: verbose mode
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type: dict
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sample: {"route_distinguisher": "70:10", "route_target_both": [],
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"route_target_export": [], "route_target_import": [
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"4100:100", "5000:10", "5001:10"], "vni": "6000"}
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updates:
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description: commands sent to the device
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returned: always
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type: list
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sample: ["evpn", "vni 6000 l2", "route-target import 5001:10"]
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changed:
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description: check to see if a change was made on the device
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returned: always
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type: boolean
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sample: true
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'''
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# COMMON CODE FOR MIGRATION
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import re
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from ansible.module_utils.basic import get_exception
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from ansible.module_utils.netcfg import NetworkConfig, ConfigLine
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from ansible.module_utils.shell import ShellError
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try:
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from ansible.module_utils.nxos import get_module
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except ImportError:
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from ansible.module_utils.nxos import NetworkModule
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def to_list(val):
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if isinstance(val, (list, tuple)):
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return list(val)
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elif val is not None:
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return [val]
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else:
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return list()
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class CustomNetworkConfig(NetworkConfig):
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def expand_section(self, configobj, S=None):
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if S is None:
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S = list()
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S.append(configobj)
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for child in configobj.children:
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if child in S:
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continue
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self.expand_section(child, S)
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return S
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def get_object(self, path):
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for item in self.items:
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if item.text == path[-1]:
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parents = [p.text for p in item.parents]
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if parents == path[:-1]:
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return item
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def to_block(self, section):
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return '\n'.join([item.raw for item in section])
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def get_section(self, path):
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try:
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section = self.get_section_objects(path)
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return self.to_block(section)
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except ValueError:
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return list()
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def get_section_objects(self, path):
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if not isinstance(path, list):
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path = [path]
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obj = self.get_object(path)
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if not obj:
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raise ValueError('path does not exist in config')
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return self.expand_section(obj)
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def add(self, lines, parents=None):
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"""Adds one or lines of configuration
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"""
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ancestors = list()
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offset = 0
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obj = None
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## global config command
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if not parents:
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for line in to_list(lines):
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item = ConfigLine(line)
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item.raw = line
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if item not in self.items:
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self.items.append(item)
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else:
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for index, p in enumerate(parents):
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try:
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i = index + 1
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obj = self.get_section_objects(parents[:i])[0]
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ancestors.append(obj)
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except ValueError:
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# add parent to config
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offset = index * self.indent
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obj = ConfigLine(p)
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obj.raw = p.rjust(len(p) + offset)
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if ancestors:
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obj.parents = list(ancestors)
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ancestors[-1].children.append(obj)
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self.items.append(obj)
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ancestors.append(obj)
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# add child objects
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for line in to_list(lines):
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# check if child already exists
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for child in ancestors[-1].children:
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if child.text == line:
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break
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else:
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offset = len(parents) * self.indent
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item = ConfigLine(line)
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item.raw = line.rjust(len(line) + offset)
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item.parents = ancestors
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ancestors[-1].children.append(item)
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self.items.append(item)
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def get_network_module(**kwargs):
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try:
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return get_module(**kwargs)
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except NameError:
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return NetworkModule(**kwargs)
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def get_config(module, include_defaults=False):
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config = module.params['config']
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if not config:
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try:
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config = module.get_config()
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except AttributeError:
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defaults = module.params['include_defaults']
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config = module.config.get_config(include_defaults=defaults)
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return CustomNetworkConfig(indent=2, contents=config)
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def load_config(module, candidate):
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config = get_config(module)
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commands = candidate.difference(config)
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commands = [str(c).strip() for c in commands]
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save_config = module.params['save']
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result = dict(changed=False)
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if commands:
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if not module.check_mode:
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try:
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module.configure(commands)
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except AttributeError:
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module.config(commands)
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if save_config:
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try:
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module.config.save_config()
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except AttributeError:
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module.execute(['copy running-config startup-config'])
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result['changed'] = True
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result['updates'] = commands
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return result
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# END OF COMMON CODE
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PARAM_TO_COMMAND_KEYMAP = {
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'vni': 'vni',
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'route_target_both': 'route-target both',
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'route_target_import': 'route-target import',
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'route_target_export': 'route-target export',
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'route_distinguisher': 'rd'
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}
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WARNINGS = []
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import time
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def invoke(name, *args, **kwargs):
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func = globals().get(name)
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if func:
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return func(*args, **kwargs)
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def get_value(arg, config, module):
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REGEX = re.compile(r'(?:{0}\s)(?P<value>.*)$'.format(PARAM_TO_COMMAND_KEYMAP[arg]), re.M)
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value = ''
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if PARAM_TO_COMMAND_KEYMAP[arg] in config:
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value = REGEX.search(config).group('value')
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return value
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def get_route_target_value(arg, config, module):
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splitted_config = config.splitlines()
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value_list = []
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REGEX = re.compile(r'(?:{0}\s)(?P<value>.*)$'.format(PARAM_TO_COMMAND_KEYMAP[arg]), re.M)
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for line in splitted_config:
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value = ''
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if PARAM_TO_COMMAND_KEYMAP[arg] in line.strip():
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value = REGEX.search(line).group('value')
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value_list.append(value)
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return value_list
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def get_existing(module, args):
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existing = {}
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netcfg = get_config(module)
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parents = ['evpn', 'vni {0} l2'.format(module.params['vni'])]
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config = netcfg.get_section(parents)
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if config:
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for arg in args:
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if arg != 'vni':
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if arg == 'route_distinguisher':
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existing[arg] = get_value(arg, config, module)
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else:
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existing[arg] = get_route_target_value(arg, config, module)
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existing_fix = dict((k, v) for k, v in existing.iteritems() if v)
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if existing_fix:
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existing['vni'] = module.params['vni']
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else:
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existing = existing_fix
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return existing
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def apply_key_map(key_map, table):
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new_dict = {}
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for key, value in table.items():
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new_key = key_map.get(key)
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if new_key:
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value = table.get(key)
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if value:
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new_dict[new_key] = value
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else:
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new_dict[new_key] = value
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return new_dict
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def state_present(module, existing, proposed):
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commands = list()
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parents = list()
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proposed_commands = apply_key_map(PARAM_TO_COMMAND_KEYMAP, proposed)
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existing_commands = apply_key_map(PARAM_TO_COMMAND_KEYMAP, existing)
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for key, value in proposed_commands.iteritems():
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if key.startswith('route-target'):
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if value == ['default']:
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existing_value = existing_commands.get(key)
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if existing_value:
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for target in existing_value:
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commands.append('no {0} {1}'.format(key, target))
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else:
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if not isinstance(value, list):
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value = [value]
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for target in value:
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if existing:
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if target not in existing.get(key.replace('-', '_').replace(' ', '_')):
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commands.append('{0} {1}'.format(key, target))
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else:
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commands.append('{0} {1}'.format(key, target))
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else:
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if value == 'default':
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existing_value = existing_commands.get(key)
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if existing_value:
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commands.append('no {0} {1}'.format(key, existing_value))
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else:
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command = '{0} {1}'.format(key, value)
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commands.append(command)
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if commands:
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parents = ['evpn', 'vni {0} l2'.format(module.params['vni'])]
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return commands, parents
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def state_absent(module, existing, proposed):
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commands = ['no vni {0} l2'.format(module.params['vni'])]
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parents = ['evpn']
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return commands, parents
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def execute_config(module, candidate):
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result = {}
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try:
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response = load_config(module, candidate)
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result.update(response)
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except ShellError:
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exc = get_exception()
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module.fail_json(msg=str(exc))
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return result
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def main():
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argument_spec = dict(
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vni=dict(required=True, type='str'),
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route_distinguisher=dict(required=False, type='str'),
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route_target_both=dict(required=False, type='list'),
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route_target_import=dict(required=False, type='list'),
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route_target_export=dict(required=False, type='list'),
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state=dict(choices=['present', 'absent'], default='present',
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required=False),
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include_defaults=dict(default=True),
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config=dict(),
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save=dict(type='bool', default=False)
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)
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module = get_network_module(argument_spec=argument_spec,
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supports_check_mode=True)
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state = module.params['state']
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args = [
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'vni',
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'route_distinguisher',
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'route_target_both',
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'route_target_import',
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'route_target_export'
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]
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existing = invoke('get_existing', module, args)
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end_state = existing
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proposed_args = dict((k, v) for k, v in module.params.iteritems()
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if v is not None and k in args)
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proposed = {}
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for key, value in proposed_args.iteritems():
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if key != 'vni':
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if value == 'true':
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value = True
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elif value == 'false':
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value = False
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if existing.get(key) or (not existing.get(key) and value):
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proposed[key] = value
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result = {}
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if state == 'present' or (state == 'absent' and existing):
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candidate = CustomNetworkConfig(indent=3)
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commands, parents = invoke('state_%s' % state, module, existing,
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proposed)
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if commands:
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if (existing.get('route_distinguisher') and
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proposed.get('route_distinguisher')):
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if (existing['route_distinguisher'] != proposed[
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'route_distinguisher'] and
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proposed['route_distinguisher'] != 'default'):
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WARNINGS.append('EVPN RD {0} was automatically removed. '
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'It is highly recommended to use a task '
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'(with default as value) to explicitly '
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'unconfigure it.'.format(
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existing['route_distinguisher']))
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remove_commands = ['no rd {0}'.format(
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existing['route_distinguisher'])]
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candidate.add(remove_commands, parents=parents)
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result = execute_config(module, candidate)
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time.sleep(30)
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candidate = CustomNetworkConfig(indent=3)
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candidate.add(commands, parents=parents)
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result = execute_config(module, candidate)
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else:
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result['updates'] = []
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result['connected'] = module.connected
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if module._verbosity > 0:
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end_state = invoke('get_existing', module, args)
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result['end_state'] = end_state
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result['existing'] = existing
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result['proposed'] = proposed_args
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if WARNINGS:
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result['warnings'] = WARNINGS
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module.exit_json(**result)
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if __name__ == '__main__':
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main()
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