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| # This script is used for updating the VLANs that are trunked down to ESX boxes.
# It works by logging in to each switch in the DC then looking at the interfaces that have 'ESXHOST'
# in the description. For each of those switchports, it will run the 'alter' commands
from Exscript.Account import Account
from Exscript.protocols import SSH2
import argparse
import getopt
import getpass
import sys
#A list of the switches to interigate. These are the switches that have ESXi hosts in them
SWITCHES = [
'10.0.0.2',
'10.0.0.3',
'10.0.0.4',
'10.0.0.5',
'10.0.0.7'
]
#Commands to execute for every switchport
vlan_commands = """
switchport trunk allowed vlan add 5,10,15,20-25,30,40,50
switchport trunk allowed vlan add 60,69,70,100-1000
"""
def query_yes_no(question, default="yes"):
"""Ask a yes/no question via raw_input() and return their answer.
"question" is a string that is presented to the user.
"default" is the presumed answer if the user just hits <Enter>.
It must be "yes" (the default), "no" or None (meaning
an answer is required of the user).
The "answer" return value is one of "yes" or "no".
"""
valid = {"yes":True, "y":True, "ye":True,
"no":False, "n":False}
if default == None:
prompt = " [y/n] "
elif default == "yes":
prompt = " [Y/n] "
elif default == "no":
prompt = " [y/N] "
else:
raise ValueError("invalid default answer: '%s'" % default)
while True:
sys.stdout.write(question + prompt)
choice = raw_input().lower()
if default is not None and choice == '':
return valid[default]
elif choice in valid:
return valid[choice]
else:
sys.stdout.write("Please respond with 'yes' or 'no' "\
"(or 'y' or 'n').\n")
def returnInterfacesFromShowDescription(text):
"""
Returns a LIST of interfaces from the output of 'show interface desc' from a cisco device
"""
return [ x.split()[0] for x in text.split("\n") ]
def genUpdateConfigForInterfaces(config, interfaces):
"""
Takes in a configuration block to run, a list of interfaces and generates the appropriate int range commands with the
config block after
"""
updateConfig = ""
while len(interfaces) > 0:
updateConfig += "int range " + ",".join(interfaces[:5])
interfaces = interfaces[5:]
updateConfig += "\n %s\n" % config.strip()
return updateConfig
def updateSwitchportsWithDescription(switch, description, username, password, commands):
"""
Function is used to log into a switch, find all switchports that CONTAINS the description
with each of the said switchports, it will then execute the given commands.
switch: Device to log into
description: Search string to try and find in the switchport description
username: Username to log into the switch with
password: The password to log into the switch with
commands: A list of commands that should be executed
"""
print "Working with switch: %s" % switch
#establish a SSH connection to the host
conn = SSH2()
account = Account(username, password)
conn.connect(switch)
conn.login(account)
#Do some pre-setup
conn.execute('')
#Make sure we're in super user mode
conn.execute('enable')
conn.execute('terminal length 0')
#find all ports that have ESXHOST (or whatever is set in description) in the description
conn.execute('show int desc | i %s' % description)
ports = conn.response.strip()
print "Ports are:"
print ports
portsList = returnInterfacesFromShowDescription(ports)[1:-1]
#go into config mode and get ready to run the update commands
#Generate a list of the update commands that should be ran
updateCommands = genUpdateConfigForInterfaces(commands, portsList).split("\n")
conn.execute('conf t')
print conn.response.strip()
print "! About to execute the following commands."
for line in updateCommands:
print "! " + line
if query_yes_no('Execute Commands?', default="no"):
#Run the set of commands given
for command in updateCommands:
conn.execute(command)
print conn.response
#Exit out of config mode
conn.execute("exit")
conn.execute("exit")
print conn.response
print
if __name__ == '__main__':
parser = argparse.ArgumentParser(description="DC ESX VLAN Utility")
parser.add_argument('--user', help='The username that should be used to log into the switches with')
args = parser.parse_args()
if args.user:
username = args.user
else:
username = getpass.getuser()
password = getpass.getpass()
# Generate a list of commands
for switch in SWITCHES:
updateSwitchportsWithDescription(switch, 'ESXHOST', username, password, vlan_commands)
|
