topic RE: Python SSH script to log into Extreme switch, run command and save output in ExtremeSwitching (EXOS/Switch Engine)

Python SSH script to log into Extreme switch, run command and save output

Marvell_Kay — Thu, 14 Dec 2017 06:09:00 GMT

I have been trying to write a python script that logins to Extreme switch via SSH2, runs commands and shows output. I looked at Extreme's github page but can't seem to find it. Is there a example script that someone can share that login and runs commands. I also heard there is a better way to screen scrap Extreme.

Thanks
Damon

RE: Python SSH script to log into Extreme switch, run command and save output

davidj_cogliane — Thu, 14 Dec 2017 07:00:00 GMT

If you're just trying to run a command or two, what about using NetSight. Or if you don't have that you might consider secure crt instead of putty. CRT would allow you to run commands on groups of switches.

RE: Python SSH script to log into Extreme switch, run command and save output

Marvell_Kay — Thu, 14 Dec 2017 07:10:00 GMT

I can't use SecureCRT as it will be a web service. I was looking for just a script to SSH and run commands .. maybe paramiko/pextect? I could not find any example.

I tried something simple like this but it didn't work:

import pexpect
import sys

switch_ip = "10.10.10.1"
switch_un = "user"
switch_pw = "pass"

child = pexpect.spawn('ssh %s@%s' % (switch_un, switch_ip))
child.logfile = sys.stdout
child.timeout = 4
child.expect('Password:')
child.sendline(switch_pw)
child.expect('#')

RE: Python SSH script to log into Extreme switch, run command and save output

OscarK — Thu, 14 Dec 2017 14:33:00 GMT

class SSH2EXOS:
def __init__(self, switch, user='admin',password=''):
self.connected = True
self.client = paramiko.SSHClient()
self.client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
self.client.connect(switch,username=user,password=password)
stdin, stdout, stderr = self.client.exec_command("disable clipaging")
stdin.close()

def cmdFast(self,cmd,timeout=30):
stdin, stdout, stderr = self.client.exec_command(cmd)
stdin.close()
return cmd+"\n"+stdout.read()

def exit(self):
self.client.close()
self.connected = False

def exitwithsave(self,save):
if save == "Y":
print "Saving config"
try:
stdin, stdout, stderr = self.client.exec_command('save')
stdin.flush()
print stdout.read()
self.client.close()
self.connected = False
except:
print "except"
self.client.close()
self.connected = False

def isConnected(self):
if self.connected:
return True
else:
return False

def main():
parser = argparse.ArgumentParser(description='Connect to switch(es) and delete xsf files')
parser.add_argument("-u", dest="user", default="admin", help="Username")
parser.add_argument("-p", dest="password", default="", help="Password, leave out for none")
parser.add_argument("-s", dest="switch", default=None, help="Switch IP address")
args = parser.parse_args()

mlagfilters = None
if args.switch:
print "Connecting to :",args.switch
xos = SSH2EXOS(checkIP(args.switch), user=args.user, password=args.password)
if xos.isConnected():
print "Connected."
info = xos.cmdFast("show switch")
for line in info.splitlines():
m = re.search(r'SysName:\s+(\S+)',line)
if m:
switchname = m.group(1)
xos.exit()

RE: Python SSH script to log into Extreme switch, run command and save output

Marvell_Kay — Fri, 15 Dec 2017 00:53:00 GMT

Thanks!!! I will look into JSONRPC but since we have mixture of codes in out env I don't think it is going to work.

I tried the second code but when i run it on by Linux machine, it shows nothing. It does run without giving me any errors but no output. I have a test device with user "user12" and password "1password2" with ip "10.10.10.1". Here is how I edited the code. Can you please check and see if I missed something. I am not familiar with classes.

I also added a print in main and I don't see that either.

class SSH2EXOS:
def __init__(self, switch, user='user12',password='1password2'):
self.connected = True
self.client = paramiko.SSHClient()
self.client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
self.client.connect(switch,username=user,password=password)
stdin, stdout, stderr = self.client.exec_command("disable clipaging")
stdin.close()
def cmdFast(self,cmd,timeout=30):
stdin, stdout, stderr = self.client.exec_command(cmd)
stdin.close()
return cmd+"\n"+stdout.read()
def exit(self):
self.client.close()
self.connected = False
def exitwithsave(self,save):
if save == "Y":
print "Saving config"
try:
stdin, stdout, stderr = self.client.exec_command('save')
stdin.flush()
print stdout.read()
self.client.close()
self.connected = False
except:
print "except"
self.client.close()
self.connected = False

def isConnected(self):
if self.connected:
return True
else:
return False
def main(): print "Main"
parser = argparse.ArgumentParser(description='Connect to switch(es) and delete xsf files')
parser.add_argument("-u", dest="user", default="user12", help="Username")
parser.add_argument("-p", dest="password", default="1password2", help="Password, leave out for none") parser.add_argument("-s", dest="switch", default=None, help="10.10.10.1")
args = parser.parse_args()
mlagfilters = None
if args.switch:
print "Connecting to :",args.switch
xos = SSH2EXOS(checkIP(args.switch), user=args.user, password=args.password)
if xos.isConnected():
print "Connected."
info = xos.cmdFast("show switch")
for line in info.splitlines():
m = re.search(r'SysName:\s+(\S+)',line)
if m:
switchname = m.group(1)
xos.exit()

RE: Python SSH script to log into Extreme switch, run command and save output

OscarK — Mon, 18 Dec 2017 14:50:00 GMT

Yes, the script I provided only connects to a switch and exits, to print something you need to add more.
Just before xos.exit() enter lines for commands like:
print xos.cmd("show vlan")

RE: Python SSH script to log into Extreme switch, run command and save output

Ludovico_Steven — Tue, 16 Jan 2018 21:21:00 GMT

Also add a last line with:
main()But argparse needs to be imported from somewhere..

RE: Python SSH script to log into Extreme switch, run command and save output

Norbert_Elitze1 — Thu, 18 Jan 2018 01:02:00 GMT

or something like:
#with SSH login without password and authentication keys enabled
import subprocess
try:
out = subprocess.check_output(['printf "show config\n" | ssh -o ForwardX11=no -T admin@10.0.0.1'], shell=True)
except subprocess.CalledProcessError as e:
out = e.output
print out
exit(1)
print "Switch output: %s\n" % out

RE: Python SSH script to log into Extreme switch, run command and save output

tknv — Tue, 06 Feb 2018 13:10:00 GMT

I think using netmiko is easy for python SSH scripting.
Very simple example:
from netmiko import ConnectHandler extrm_X460 = { 'device_type': 'extreme', 'ip': '172.16.10.2', 'username': 'admin', 'password': 'verysecret', 'port' : 12322, # optional, defaults to 22 } net_connect = ConnectHandler(**extrm_X460) output = net_connect.send_command('show switch') print(output)