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- #!/usr/bin/env python3
- #
- # Copyright (c) 2017-2020 Joe Clarke <jclarke@cisco.com>
- # All rights reserved.
- #
- # Redistribution and use in source and binary forms, with or without
- # modification, are permitted provided that the following conditions
- # are met:
- # 1. Redistributions of source code must retain the above copyright
- # notice, this list of conditions and the following disclaimer.
- # 2. Redistributions in binary form must reproduce the above copyright
- # notice, this list of conditions and the following disclaimer in the
- # documentation and/or other materials provided with the distribution.
- #
- # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- # SUCH DAMAGE.
- from builtins import str
- from builtins import range
- import os
- import re
- import sys
- import time
- import json
- import paramiko
- import CLEUCreds
- CACHE_FILE = "/home/jclarke/mac_counts.dat"
- CACHE_FILE_TMP = CACHE_FILE + ".tmp"
- commands = [
- {
- "command": "show mac address-table count | inc Dynamic Address Count",
- "pattern": r"Dynamic Address Count:\s+(\d+)",
- "metric": "totalMacs",
- "devices": ["core1-l3c", "core2-l3c"],
- },
- {
- "command": "show mac address-table dynamic | inc Total",
- "pattern": r"Total.*: (\d+)",
- "metric": "totalMacs",
- "devicePatterns": [{"pattern": "10.127.0.{}", "range": {"min": 1, "max": 60}}],
- },
- {
- "command": "show ip arp summary | inc IP ARP",
- "pattern": r"(\d+) IP ARP entries",
- "metric": "arpEntries",
- "devicePatterns": [{"pattern": "10.127.0.{}", "range": {"min": 1, "max": 60}}],
- },
- ]
- def send_command(chan, command):
- chan.sendall(command + "\n")
- i = 0
- output = ""
- while i < 10:
- if chan.recv_ready():
- break
- i += 1
- time.sleep(i * 0.5)
- while chan.recv_ready():
- r = chan.recv(131070).decode("utf-8")
- output = output + r
- return output
- def get_results(ssh_client, ip, command, pattern, metric):
- response = ""
- try:
- ssh_client.connect(ip, username=CLEUCreds.NET_USER, password=CLEUCreds.NET_PASS, timeout=5, allow_agent=False, look_for_keys=False)
- chan = ssh_client.invoke_shell()
- output = ""
- try:
- send_command(chan, "term length 0")
- send_command(chan, "term width 0")
- output = send_command(chan, command)
- except Exception as ie:
- response = '{}{{idf="{}"}}'.format(metric, ip)
- sys.stderr.write("Failed to get MACs from {}: {}\n".format(ip, ie))
- return response
- m = re.search(pattern, output)
- if m:
- response = '{}{{idf="{}"}} {}'.format(metric, ip, m.group(1))
- else:
- response = '{}{{idf="{}"}} 0'.format(metric, ip)
- except Exception as e:
- ssh_client.close()
- sys.stderr.write("Failed to connect to {}: {}\n".format(ip, e))
- return ""
- ssh_client.close()
- return response
- def get_metrics():
- response = []
- ssh_client = paramiko.SSHClient()
- ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
- for command in commands:
- if "devices" in command:
- for device in command["devices"]:
- response.append(get_results(ssh_client, device, command["command"], command["pattern"], command["metric"]))
- else:
- for pattern in command["devicePatterns"]:
- if "range" in pattern:
- for i in range(pattern["range"]["min"], pattern["range"]["max"]):
- response.append(
- get_results(
- ssh_client, pattern["pattern"].format(str(i)), command["command"], command["pattern"], command["metric"]
- )
- )
- else:
- for sub in pattern["subs"]:
- response.append(
- get_results(
- ssh_client, pattern["pattern"].format(sub), command["command"], command["pattern"], command["metric"]
- )
- )
- return response
- if __name__ == "__main__":
- response = get_metrics()
- fd = open(CACHE_FILE_TMP, "w")
- json.dump(response, fd, indent=4)
- fd.close()
- os.rename(CACHE_FILE_TMP, CACHE_FILE)
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