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#!/usr/bin/python
# -*- coding: utf-8 -*-
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import (absolute_import, division, print_function)
__copyright__ = "(c) 2020 Dell Inc. or its subsidiaries. All rights reserved."
__metaclass__ = type
DOCUMENTATION = '''
module: mtu_validate
author: "Senthil Kumar Ganesan (@skg-net)"
short_description: Validate the MTU value for lldp neighbors
description:
- Get the wiring info using lldp output and show system network summary.
options:
show_lldp_neighbors_list:
description:
- show lldp neighbor output
type: 'list'
required: True
show_system_network_summary:
description:
- show system network summary output
type: 'list'
required: True
show_ip_intf_brief:
description:
- show ip intf brief
type: 'list'
required: True
'''
EXAMPLES = '''
Copy below YAML into a playbook (e.g. play.yml) and run follows:
#$ ansible-playbook -i inv play.yml
name: show mtu mismatch info
hosts: localhost
connection: local
gather_facts: False
tasks:
- name: "Get Dell EMC OS10 MTU mismatch info"
os10_command:
commands:
- command: "show lldp neighbors"
- command: "show ip interface brief | display-xml"
provider: "{{ hostvars[item].cli }}"
with_items: "{{ groups['all'] }}"
register: show_lldp
- set_fact:
output: "{{ output|default([])+ [{'host': item.invocation.module_args.provider.host, 'inv_name': item.item,
'stdout_show_lldp': item.stdout.0, 'stdout_show_ip': item.stdout.1 }] }}"
loop: "{{ show_lldp.results }}"
- debug: var=output
- local_action: copy content={{ output }} dest=show1
- name: call lib to convert ip interface info from xml to dict format
base_xml_to_dict:
cli_responses: "{{ item.stdout_show_ip }}"
with_items: "{{ output }}"
register: show_ip_intf_list
- local_action: copy content={{ show_ip_intf_list }} dest=show_ip
- name: "Get Dell EMC OS10 Show system"
import_role:
name: os10_fabric_summary
register: show_system_network_summary
- debug: var=show_system_network_summary
- name: call lib to process
mtu_validate:
show_lldp_neighbors_list: "{{ output }}"
show_system_network_summary: "{{ show_system_network_summary.msg.results }}"
show_ip_intf_brief: "{{ show_ip_intf_list.results }}"
'''
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_native
from collections import OrderedDict
import re
import traceback
class MtuValidation(object):
def __init__(self):
self.module = AnsibleModule(argument_spec=self.get_fields())
self.show_lldp_neighbors_list = self.module.params['show_lldp_neighbors_list']
self.show_system_network_summary = self.module.params['show_system_network_summary']
self.show_ip_intf_brief = self.module.params['show_ip_intf_brief']
self.exit_msg = OrderedDict()
def get_fields(self):
spec_fields = {
'show_lldp_neighbors_list': {
'type': 'list',
'required': True
},
'show_system_network_summary': {
'type': 'list',
'required': True
},
'show_ip_intf_brief': {
'type': 'list',
'required': True
}
}
return spec_fields
def get_int_mtu(self, spine, port):
for show_list in self.show_ip_intf_brief:
inv_name = show_list["item"]["inv_name"]
if spine != inv_name:
continue
value = show_list["msg"]["result"]
for data in value:
intf_list = data["rpc-reply"]["bulk"]["data"]["interface"]
for val in intf_list:
intf_name = val["name"]
if intf_name == port:
mtu = val["mtu"]
return mtu
return None
# form actual neighbors per network with help of lldp output and show
# sytem output
def get_actual_neigbor(self, lldp_list):
final_out = list()
for show_system in self.show_system_network_summary:
for lldp in lldp_list:
if show_system["host"] != lldp["host"] and "node-mac" in show_system and "rem_mac" in lldp:
rem_host = show_system["host"]
loc_host = lldp["host"]
# check whether lldp output mac match with system summary
# mac and collect port and host info
dest_switch = show_system["inv_name"]
source_switch = lldp["inv_name"]
lldp_mac = lldp["rem_mac"]
for index, rem_mac in enumerate(lldp_mac):
final_dict = {}
if (str.lower(
show_system["node-mac"])) == (str.lower(rem_mac)):
final_dict["source_switch"] = source_switch
final_dict["dest_switch"] = dest_switch
final_dict["source_port"] = lldp["loc_port"][index]
final_dict["dest_port"] = lldp["rem_port"][index]
source_mtu = self.get_int_mtu(
source_switch, final_dict["source_port"])
dest_mtu = self.get_int_mtu(
dest_switch, final_dict["dest_port"])
if source_mtu is not None:
final_dict["source_mtu"] = source_mtu
if dest_mtu is not None:
final_dict["dest_mtu"] = dest_mtu
final_out.append(final_dict)
return final_out
def parse_lldp_output(self):
nbr_list = list()
for cli in self.show_lldp_neighbors_list:
out_dict = {}
loc_port = list()
rem_port = list()
rem_mac = list()
for key, value in cli.items():
if key == "host":
out_dict[key] = value
if key == "inv_name":
out_dict[key] = value
if key == "stdout_show_lldp":
output = str(value)
lldp_regexp = r"(\S+)\s+(\S+)\s+(\S+)\s+(\S+)"
lines = output.splitlines()
for line in lines:
if "Loc PortID" in line:
continue
match = re.match(lldp_regexp, line)
if match:
val = match.groups()
loc_port.append(val[0])
rem_port.append(val[2])
rem_mac.append(val[3])
out_dict["loc_port"] = loc_port
out_dict["rem_port"] = rem_port
out_dict["rem_mac"] = rem_mac
nbr_list.append(out_dict)
return nbr_list
def get_mtu_mismatch_info(self, nbr_list):
mtu_list = list()
for nbr in nbr_list:
if nbr["source_mtu"] != nbr["dest_mtu"]:
nbr["error"] = "mismatch"
mtu_list.append(nbr)
return mtu_list
def perform_action(self):
try:
lldp_list = self.parse_lldp_output()
actual_nbr = self.get_actual_neigbor(lldp_list)
mtu_mismatch_list = self.get_mtu_mismatch_info(actual_nbr)
if len(mtu_mismatch_list) > 0:
self.exit_msg.update({"results": mtu_mismatch_list})
else:
self.exit_msg.update(
{"results": "There is no MTU mistmatch between neighbors"})
self.module.exit_json(changed=False, msg=self.exit_msg)
except Exception as e:
self.module.fail_json(
msg=to_native(e),
exception=traceback.format_exc())
def main():
module_instance = MtuValidation()
module_instance.perform_action()
if __name__ == '__main__':
main()
|
