ansible/library/net_infrastructure/arista_vlan

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#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2013, Arista Networks <netdevops@aristanetworks.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
DOCUMENTATION = '''
---
module: arista_vlan
author: Peter Sprygada
short_description: Manage VLAN resources
requirements:
- Arista EOS 4.10
- Netdev extension for EOS
description:
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- Manage VLAN resources on Arista EOS network devices. This module
requires the Netdev EOS extension to be installed in EOS. For detailed
instructions for installing and using the Netdev module please see
[link]
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options:
vlan_id:
description:
- the vlan id
required: true
state:
description:
- describe the desired state of the vlan related to the config
required: false
default: 'present'
choices: [ 'present', 'absent' ]
logging:
description:
- enables or disables the syslog facility for this module
required: false
choices: [ 'true', 'false', 'yes', 'no' ]
name:
description:
- a descriptive name for the vlan
required: false
notes:
- Requires EOS 4.10 or later
- The Netdev extension for EOS must be installed and active in the
available extensions (show extensions from the EOS CLI)
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- See http://eos.aristanetworks.com for details
'''
EXAMPLES = '''
Example playbook entries using the arista_vlan module to manage resource
state.
tasks:
- name: create vlan 999
action: arista_vlan vlan_id=999 logging=true
- name: create / edit vlan 999
action: arista_vlan vlan_id=999 name=test logging=true
- name: remove vlan 999
action: arista_vlan vlan_id=999 state=absent logging=true
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'''
import syslog
import json
class AristaVlan(object):
""" This is the base class for managing VLAN resources in EOS network
devices. This class provides basic CRUD functions for VLAN
resources. This class acts as a wrapper around the netdev extension
in EOS. You must have the netdev extension installed in order for
this module to work properly.
The following commands are implemented in this module:
* netdev vlan create
* netdev vlan list
* netdev vlan show
* netdev vlan edit
* netdev vlan delete
"""
attributes = ['name']
def __init__(self, module):
self.module = module
self.vlan_id = module.params['vlan_id']
self.name = module.params['name']
self.state = module.params['state']
self.logging = module.boolean(module.params['logging'])
@property
def changed(self):
""" The changed property provides a boolean response if the currently
loaded resouces has changed from the resource running in EOS.
Returns True if the object is not in sync
Returns False if the object is in sync.
"""
return len(self.updates()) > 0
def log(self, entry):
""" This method is responsible for sending log messages to the local
syslog.
"""
if self.logging:
syslog.openlog('ansible-%s' % os.path.basename(__file__))
syslog.syslog(syslog.LOG_INFO, entry)
def run_command(self, cmd):
""" Calls the Ansible module run_command method. This method will
also send a message to syslog with the command name
"""
self.log("Command: %s" % cmd)
return self.module.run_command(cmd.split())
def delete(self):
""" Deletes an existing VLAN resource from the current running
configuration. A nonexistent VLAN will return successful for this
operation.
This method implements the following commands:
* netdev vlan delete {vlan_id}
Returns nothing if the delete was successful
Returns error message if there was a problem deleting the vlan
"""
cmd = "netdev vlan delete %s" % self.vlan_id
(rc, out, err) = self.run_command(cmd)
resp = json.loads(out)
if resp.get('status') != 200:
rc = resp['status']
err = resp['message']
out = None
return (rc, out, err)
def create(self):
""" Creates a VLAN resource in the current running configuration. If
the VLAN already exists, the function will return successfully.
This function implements the following commands:
* netdev vlan create {vlan_id} [--name <name>]
Returns the VLAN resource if the create function was successful
Returns an error message if there as a problem creating the vlan
"""
attribs = []
for attrib in self.attributes:
if getattr(self, attrib):
attribs.append("--%s" % attrib)
attribs.append(getattr(self, attrib))
cmd = "netdev vlan create %s " % self.vlan_id
cmd += " ".join(attribs)
(rc, out, err) = self.run_command(cmd)
resp = json.loads(out)
if resp.get('status') != 201:
rc = int(resp['status'])
err = resp['message']
out = None
else:
out = resp['result']
return (rc, out, err)
def update(self):
""" Updates an existing VLAN resource in the current running
configuration. If the VLAN resource does not exist, this method
will return an error.
This method implements the following commands:
* netdev vlan edit {vlan_id} [--name <name>]
Returns an updated VLAN resoure if the create method was successful
"""
attribs = list()
for attrib in self.updates():
attribs.append("--%s" % attrib)
attribs.append(getattr(self, attrib))
if attribs:
cmd = "netdev vlan edit %s " % self.vlan_id
cmd += " ".join(attribs)
(rc, out, err) = self.run_command(cmd)
resp = json.loads(out)
if resp.get('status') != 200:
rc = int(resp['status'])
err = resp['message']
out = None
else:
out = resp['result']
return (rc, out, err)
return (0, None, "No attributes have been modified")
def updates(self):
""" This method will check the current VLAN resource in the running
configuration and return a list of attributes that are not in sync
with the current resource from the running configuration.
"""
obj = self.get()
update = lambda a, z: a != z
updates = list()
for attrib in self.attributes:
value = getattr(self, attrib)
if update(obj[attrib], update) and value is not None:
updates.append(attrib)
self.log("updates: %s" % updates)
return updates
def exists(self):
""" Returns True if the current VLAN resource exists and returns False
if it does not. This method only checks for the existence of the
VLAN ID.
"""
(rc, out, err) = self.run_command("netdev vlan list")
collection = json.loads(out)
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return str(self.vlan_id) in collection.get('result')
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def get(self):
""" This method will return a dictionary with the attributes of the
VLAN resource identified in vlan_id. The VLAN resource has the
following stucture:
{
"vlan_id": <vlan_id>,
"name": <name>
}
If the VLAN ID specified by vlan_id does not exist in the system,
this method will return None
"""
cmd = "netdev vlan show %s" % self.vlan_id
(rc, out, err) = self.run_command(cmd)
obj = json.loads(out)
if obj.get('status') != 200:
return None
return obj['result']
def main():
module = AnsibleModule(
argument_spec = dict(
vlan_id=dict(default=None, required=True, type='int'),
name=dict(default=None, type='str'),
state=dict(default='present', choices=['present', 'absent']),
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logging=dict(default=False, type='bool')
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),
supports_check_mode = True
)
obj = AristaVlan(module)
rc = None
result = dict()
if obj.state == 'absent':
if obj.exists():
if module.check_mode:
module.exit_json(changed=True)
(rc, out, err) = obj.delete()
if rc !=0:
module.fail_json(msg=err, rc=rc)
elif obj.state == 'present':
if not obj.exists():
if module.check_mode:
module.exit_json(changed=True)
(rc, out, err) = obj.create()
result['results'] = out
else:
if obj.changed:
if module.check_mode:
module.exit_json(changed=obj.changed)
(rc, out, err) = obj.update()
result['results'] = out
if rc is not None and rc != 0:
module.fail_json(msg=err, rc=rc)
if rc is None:
result['changed'] = False
else:
result['changed'] = True
module.exit_json(**result)
# include magic from lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()