324 lines
11 KiB
Python
324 lines
11 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2013, Arista Networks <netdevops@aristanetworks.com>
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#
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# This program 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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# This program 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 this program. 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: arista_lag
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version_added: "1.3"
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author: Peter Sprygada
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short_description: Manage port channel (lag) interfaces
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requirements:
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- Arista EOS 4.10
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- Netdev extension for EOS
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description:
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- Manage port channel interface resources on Arista EOS network devices
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options:
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interface_id:
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description:
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- the full name of the interface
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required: true
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state:
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description:
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- describe the desired state of the interface related to the config
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required: false
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default: 'present'
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choices: [ 'present', 'absent' ]
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logging:
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description:
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- enables or disables the syslog facility for this module
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required: false
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default: false
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choices: [ 'true', 'false', 'yes', 'no' ]
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links:
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description:
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- array of physical interface links to include in this lag
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required: false
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minimum_links:
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description:
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- the minimum number of physical interaces that must be operationally up to consider the lag operationally up
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required: false
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lacp:
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description:
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- enables the use of the LACP protocol for managing link bundles
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required: false
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default: 'active'
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choices: [ 'active', 'passive', 'off' ]
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notes:
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- Requires EOS 4.10 or later
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- The Netdev extension for EOS must be installed and active in the
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available extensions (show extensions from the EOS CLI)
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- See http://eos.aristanetworks.com for details
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'''
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EXAMPLES = '''
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Example playbook entries using the arista_lag module to manage resource
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state. Note that interface names must be the full interface name not shortcut
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names (ie Ethernet, not Et1)
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tasks:
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- name: create lag interface
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action: arista_lag interface_id=Port-Channel1 links=Ethernet1,Ethernet2 logging=true
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- name: add member links
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action: arista_lag interface_id=Port-Channel1 links=Ethernet1,Ethernet2,Ethernet3 logging=true
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- name: remove member links
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action: arista_lag interface_id=Port-Channel1 links=Ethernet2,Ethernet3 logging=true
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- name: remove lag interface
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action: arista_lag interface_id=Port-Channel1 state=absent logging=true
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'''
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import syslog
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import json
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class AristaLag(object):
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""" This is the base class managing port-channel (lag) interfaces
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resources in Arista EOS network devices. This class provides an
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implementation for creating, updating and deleting port-channel
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interfaces.
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Note: The netdev extension for EOS must be installed in order of this
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module to work properly.
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The following commands are implemented in this module:
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* netdev lag list
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* netdev lag show
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* netdev lag edit
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* netdev lag delete
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"""
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attributes = ['links', 'minimum_links', 'lacp']
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def __init__(self, module):
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self.module = module
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self.interface_id = module.params['interface_id']
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self.state = module.params['state']
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self.links = module.params['links']
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self.minimum_links = module.params['minimum_links']
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self.lacp = module.params['lacp']
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self.logging = module.params['logging']
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@property
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def changed(self):
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""" The changed property provides a boolean response if the currently
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loaded resouces has changed from the resource running in EOS.
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Returns True if the object is not in sync
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Returns False if the object is in sync.
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"""
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return len(self.updates()) > 0
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def log(self, entry):
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""" This method is responsible for sending log messages to the local
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syslog.
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"""
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if self.logging:
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syslog.openlog('ansible-%s' % os.path.basename(__file__))
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syslog.syslog(syslog.LOG_NOTICE, entry)
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def run_command(self, cmd):
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""" Calls the Ansible module run_command method. This method will
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directly return the results of the run_command method
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"""
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self.log("Command: %s" % cmd)
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return self.module.run_command(cmd.split())
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def get(self):
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""" This method will return a dictionary with the attributes of the
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lag interface resource specified in interface_id. The lag
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interface resource has the following structure:
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{
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"interface_id": <interface_id>,
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"links": <array of member interfaces>,
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"minimum_links": <minimum_links>,
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"lacp": [active* | passive | off]
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}
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If the lag interface specified by interface_id does not
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exist in the system, this method will return None.
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"""
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cmd = "netdev lag show %s" % self.interface_id
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(rc, out, err) = self.run_command(cmd)
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obj = json.loads(out)
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if obj.get('status') != 200:
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return None
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return obj['result']
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def create(self):
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""" Creates a lag interface resource in the current running
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configuration. If the lag interface already exists, the
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function will return successfully.
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This function implements the following commands:
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* netdev lag create {interface_id} [attributes]
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Returns the lag interface resource if the create method was
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successful
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Returns an error message if there as a problem creating the lag
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interface
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"""
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attribs = []
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for attrib in self.attributes:
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if getattr(self, attrib):
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attribs.append("--%s" % attrib)
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attribs.append(getattr(self, attrib))
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cmd = "netdev lag create %s " % self.interface_id
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cmd += " ".join(attribs)
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(rc, out, err) = self.run_command(cmd)
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resp = json.loads(out)
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if resp.get('status') != 201:
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rc = int(resp['status'])
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err = resp['message']
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out = None
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else:
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out = self.get()
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return (rc, out, err)
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def update(self):
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""" Updates an existing lag resource in the current running
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configuration. If the lag resource does not exist, this method
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will return an error.
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This method implements the following commands:
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* netdev lag edit {interface_id} [attributes]
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Returns an updated lag interafce resoure if the update method
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was successful
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"""
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attribs = list()
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for attrib in self.updates():
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attribs.append("--%s" % attrib)
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attribs.append(getattr(self, attrib))
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cmd = "netdev lag edit %s " % self.interface_id
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cmd += " ".join(attribs)
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(rc, out, err) = self.run_command(cmd)
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resp = json.loads(out)
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if resp.get('status') != 200:
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rc = int(resp['status'])
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err = resp['message']
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out = None
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else:
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out = resp['result']
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return (rc, out, err)
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return (2, None, "No attributes have been modified")
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def delete(self):
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""" Deletes an existing lag interface resource from the current
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running configuration. A nonexistent lag interface will
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return successful for this operation.
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This method implements the following commands:
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* netdev lag delete {interface_id}
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Returns nothing if the delete was successful
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Returns error message if there was a problem deleting the resource
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"""
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cmd = "netdev lag delete %s" % self.interface_id
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(rc, out, err) = self.run_command(cmd)
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resp = json.loads(out)
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if resp.get('status') != 200:
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rc = resp['status']
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err = resp['message']
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out = None
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return (rc, out, err)
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def updates(self):
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""" This method will check the current lag interface resource in the
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running configuration and return a list of attributes that are
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not in sync with the current resource.
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"""
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obj = self.get()
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update = lambda a, z: a != z
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updates = list()
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for attrib in self.attributes:
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if update(obj[attrib], getattr(self, attrib)):
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updates.append(attrib)
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return updates
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def exists(self):
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""" Returns True if the current lag interface resource exists and
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returns False if it does not. This method only checks for the
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existence of the interface as specified in interface_id.
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"""
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(rc, out, err) = self.run_command("netdev lag list")
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collection = json.loads(out)
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return self.interface_id in collection.get('result')
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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interface_id=dict(default=None, type='str'),
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state=dict(default='present', choices=['present', 'absent'], type='str'),
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links=dict(default=None, type='str'),
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lacp=dict(default=None, choices=['active', 'passive', 'off'], type='str'),
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minimum_links=dict(default=None, type='int'),
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logging=dict(default=False, type='bool')
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),
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supports_check_mode = True
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)
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obj = AristaLag(module)
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rc = None
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result = dict()
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if obj.state == 'absent':
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if obj.exists():
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if module.check_mode:
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module.exit_json(changed=True)
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(rc, out, err) = obj.delete()
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if rc !=0:
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module.fail_json(msg=err, rc=rc)
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elif obj.state == 'present':
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if not obj.exists():
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if module.check_mode:
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module.exit_json(changed=True)
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(rc, out, err) = obj.create()
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result['results'] = out
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else:
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if module.check_mode:
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module.exit_json(changed=obj.changed)
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(rc, out, err) = obj.update()
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result['results'] = out
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if rc is not None and rc != 0:
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module.fail_json(msg=err, rc=rc)
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if rc is None:
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result['changed'] = False
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else:
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result['changed'] = True
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module.exit_json(**result)
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# import module snippets
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from ansible.module_utils.basic import *
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main()
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