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#!/usr/bin/python
#
# 'router', 'host' and 'device' are used interchangably in this script
configsDir = "/store/rancid/nordunet/configs"
outputDir = "/home/vlanscrape/data"
routerDBFile = "/store/rancid/nordunet/router.db"
routerDB = dict()
# populate 'routerDB' with the contents of routerDBFile
f = open(routerDBFile, 'r')
for line in f:
hostname, vendor, state = line.split(";")
# ignore 'state' as it is of no consequence for the purpose of this script
routerDB[hostname]=vendor
f.close()
import os
import errno
import re
import shutil
import time
# populate 'hostList'
hostList = os.listdir(configsDir)
if 'CVS' in hostList:
hostList.remove('CVS')
if '.cvsignore' in hostList:
hostList.remove('.cvsignore')
def is_arista(hostName):
vlanDict=dict()
# print "arista: ", hostName
inFile = configsDir + "/" + hostName
outFile = outputDir + "/" + hostName
f = open(inFile)
hostConfig=f.readlines()
f.close()
for i, l in enumerate(hostConfig):
if re.match("^vlan", hostConfig[i]):
# The config allows a comma separated list of multiple vlan ids,
# with the same name, and it also allows vlans to be unnamed.
# The simplest way to handle this is to grab the (lack of) name first
# and apply it to the (list of) vlan(s) after.
j = 1
while True:
if re.match(".*name ", hostConfig[i + j]):
name = re.sub(".*name ", "", hostConfig[i + j].rstrip())
break
elif re.match('^!', hostConfig[i + j]):
name = ""
break
else:
j += 1
vlan = re.sub(".*vlan ", "", hostConfig[i].rstrip())
if "," in vlan:
for v in vlan.split(","):
vlanDict[v] = name
elif "-" in vlan:
first, last = vlan.split("-")
for v in range(int(first),(int(last) + 1)):
vlanDict[v] = name
else:
vlanDict[vlan] = name
vlanList=vlanDict.items()
check_out_vs_dst(hostName,vlanList)
def look_in_juniper_vlans_section(hostName, hostConfig):
# Since vlans in the 'vlans' section (of a switch config) can only exist
# once per 'device', using a dict here makes sense, as it ensures there will
# only be one instance.
vlanDict=dict()
vBegin = 0
vEnd = 0
for i, l in enumerate(hostConfig):
if re.match('^vlans {', l):
vBegin = i
if (vBegin != 0) and re.match('^}', l):
vEnd = i
break
for i in range(int(vBegin) + 1,int(vEnd) + 1):
# match: four spaces, the vlan 'name', one space, curly brace
if re.match('^ [\S]+ {', hostConfig[i]):
name=re.sub('{','',hostConfig[i]).strip()
j = 1
while True:
if 'vlan-id' in hostConfig[i + j]:
vlan=re.sub('vlan-id', '', hostConfig[i + j]).strip()
vlan=re.sub(';', '', vlan)
break
else:
j += 1
if (i + j) >= len(hostConfig):
vlan="none"
break
vlanDict[vlan] = name
vlanList=vlanDict.items()
return(vlanList)
def look_in_juniper_interfaces(hostName, hostConfig):
# This is different from the 'vlans' section, as we have to keep track
# of the interfaces too. Also, the same vlan-id may exist under different
# names on different interfaces. For this reason the 'vlanList' data
# structure in this def: is a list of lists
vlanList=[]
iBegin = 0
for i, l in enumerate(hostConfig):
if re.match('^interfaces {', l):
iBegin = i
if (iBegin != 0) and re.match('^}', l):
iEnd = i
break
for i in range(int(iBegin) + 1, int(iEnd) +1):
if re.match("^ [\S]+[\s]*[\S]+ {", hostConfig[i]):
iFace=re.sub('{','',hostConfig[i]).strip()
inUnit = 0
name = ''
while ( not (re.match('^ }',hostConfig[i]))):
i += 1
if re.match("^ .*unit", hostConfig[i]):
unit=re.sub("^ .*unit ",'', hostConfig[i]).strip()
unit=re.sub('{', '', unit).strip()
inUnit = 1
if (re.match('^ }', hostConfig[i])) and (inUnit == 1):
inUnit = 0
if (inUnit ==1):
if "description" in hostConfig[i]:
name=re.sub('[\s]+description','',hostConfig[i]).strip()
name=re.sub('[";]','',name)
if "vlan-id" in hostConfig[i]:
vlan=re.sub('[\s]+vlan-id', '', hostConfig[i]).strip()
vlan=re.sub(';', '', vlan)
if "-range" in vlan:
vBegin = re.sub('^-range ','', vlan)
vBegin = re.sub('-[0-9]+$', '', vBegin)
vEnd = re.sub('-range [0-9]+-', '', vlan)
for v in range(int(vBegin), int(vEnd) +1):
vlanList.append([v,name,iFace])
else:
vlanList.append([vlan,name,iFace])
return(vlanList)
def write_list_to_file(outFile, outList):
f = open(outFile, "w")
for l in outList:
f.write(l)
f.close
def check_out_vs_dst(hostName, vlanList):
outFile = outputDir + "/" + hostName
outList = []
if (len(vlanList) == 1) and ("none" in vlanList[0]):
#print "no vlans in", hostName
pass
else:
for l in sorted(vlanList, key=lambda x: int(x[0])):
o=''
for i, sl in enumerate(l):
if o == '':
o = str(sl)
else:
o = o + ";" + str(sl)
# we want the resulting 'csv' to have the same number of fields, whether
# or not the source config has 'interface' for the vlan:
if i == 1:
o = o + ";"
o = o + "\n"
outList.append(o)
if os.path.isfile(outFile):
dstList = open(outFile, 'r').readlines()
compare = set(sorted(outList)) & set(sorted(dstList))
if (len(compare) != len(dstList)) or (len(compare) != len(outList)):
write_list_to_file(outFile, outList)
else:
write_list_to_file(outFile, outList)
def is_juniper(hostName):
# print "juniper: ", host
vlanList=dict()
inFile = configsDir + "/" + hostName
outFile = outputDir + "/" + hostName
f = open(inFile)
hostConfig=f.readlines()
f.close()
if len(hostConfig) == 0:
check_out_vs_dst(hostName, '')
else:
# find device model
model = "unset"
for l in hostConfig:
if re.match('^# Chassis', l):
l = re.sub('[\s]+', ':', l)
ll = l.split(':')
model = ll[3]
if "EX" in model:
vlanList=look_in_juniper_vlans_section(hostName, hostConfig)
check_out_vs_dst(hostName,vlanList)
elif "MX" in model:
vlanList=look_in_juniper_interfaces(hostName, hostConfig)
check_out_vs_dst(hostName, vlanList)
elif "JNP204" in model:
vlanList=look_in_juniper_interfaces(hostName, hostConfig)
check_out_vs_dst(hostName, vlanList)
elif "SRX" in model:
vlanListInterfaces=look_in_juniper_interfaces(hostName, hostConfig)
vlanListVlanSection=look_in_juniper_vlans_section(hostName, hostConfig)
vlanList=vlanListInterfaces + vlanListVlanSection
check_out_vs_dst(hostName, vlanList)
elif "Virtual" in model:
vlanList=look_in_juniper_vlans_section(hostName, hostConfig)
check_out_vs_dst(hostName, vlanList)
elif "unset" in model:
print "Model info missing for", hostName, "- skipping"
else:
print "model", model, "not recognized, skipping:", hostName
try:
os.makedirs(outputDir)
except OSError as e:
if e.errno != errno.EEXIST:
raise
for host in hostList:
if host in routerDB:
if routerDB[host] == 'arista':
is_arista(host)
elif routerDB[host] == 'juniper':
is_juniper(host)
else:
print "unknown: ", host
|
