Tag: Python

1. Service now developer account
   2. Service now instance
   3. Python with Service now API installed

——————- advertisements ——————-

———————————————————-

Create service now developer account and instance

Please refer our post ‘Create service now developer account and instance’ and create new user for API calls.

Setup environment

We would  require ‘netmiko’ package to take ssh of devices. Please read part 1 and part 2  of our post for details about installing python and running your first program. Please read part 4 if you want to know how to take SSH of a switch.

Install python service-now API package

We also require ‘pysnow’ package which is using to interact with service now using REST API call. Please click here if you would like to know more about ‘pysnow’ package.

Install ‘psysnow’ using following command

‘pip install psynow’

please click here if you did not know how to install a package on python using pip

Script Definition:

The script will get service-now information and device credential initially. Then it will continuously run on server so user can update multiple incident by running the commands against multiple devices. All the required commands have to be saved on ‘command.txt’ file.

——————- advertisements ——————-

———————————————————-

It is using class ‘inc_update’ to gather information and update service-now.  Inside the class, the function ‘collectdata’ using to SSH to device and taking the out put of commands.  The function ‘inc_update’ using to update service now instance with the output.

Following are the script. It is easy to understand, and we have put inline comments for making it easy.

import pysnow
import getpass
from netmiko import ConnectHandler

print “=============================\n”
print “Program to update service now incident notes\n”
print “\n=============================\n”

##class to connect device
class cls_incident:
#initialising variables
def __init__(self,uname,password):
#initialising variables
self.uname = uname
self.password = password
self.secret=password
self.dev_type=’cisco_ios’
self.ip=”
self.output=”

——————- advertisements ——————-

———————————————————-

#creating dictionery for netmiko
self.dict_device = {
‘device_type’: self.dev_type,
‘ip’: self.ip,
‘username’: self.uname,
‘password’: self.password,
‘secret’: self.secret,
‘global_delay_factor’:1,

}

#function to login to device and collect output of command
def collectdata(self,ipaddress):
self.dict_device[‘ip’]=ipaddress
self.net_connect = ConnectHandler(**self.dict_device)
#opening command file
cmd_file=open(‘command.txt’)
self.output=”
#loop for reading command one by one
for line in cmd_file:
cmd=line.lstrip()
self.output+=”\nOutput of command “+cmd+” \n”
self.output+=self.net_connect.send_command(cmd)
cmd_file.close()

——————- advertisements ——————-

———————————————————-

print self.output
print “\nCommand Output collected”

#function to update service now
def inc_update(self,inc_number,s_uname,s_password,s_instance):
#connecting with service now
snow = pysnow.Client(instance=s_instance, user=s_uname, password=s_password)
incident = snow.resource(api_path=’/table/incident’)
#payload=self.output
update = {‘work_notes’:self.output, ‘state’: 5}
#updating incident record
updated_record = incident.update(query={‘number’:inc_number}, payload=update)
print “Incident note updated ”

def main():

#Collecting service now details
instance=raw_input(“Enter service now instant name in format of ‘company.service-now.com’ :”)

——————- advertisements ——————-

———————————————————-

instance=instance.rstrip(‘.service-now.com’)
s_uname=raw_input(“Enter service now user name:”)
s_password=getpass.getpass(“Password:”)

##Collecting device credential
dev_uname=raw_input(“\nEnter Device user name :”)
dev_passwd=getpass.getpass(“Password:”)

objDev=cls_incident(dev_uname,dev_passwd)

while True:
try:
inc_number=raw_input(“Enter incident number :”)
ip_address=raw_input(“Enter IP address of device:”)
print “Connecting device and collecting data ”
#creating class object
objDev.collectdata(ip_address)

print (“Updating service now”)
#updaing service nw
objDev.inc_update(inc_number,s_uname,s_password,instance)
print “\nThis program will keep on running, press ctrl C to exit”
print “Enter details for next incident \n”
except Exception,e:
print “Error on execution :”,e
if __name__== “__main__”:
main()

——————- advertisements ——————-

———————————————————-

How to run :

Download the ‘command.txt‘ and ‘incident-update.txt‘ in to same folder of your system. rename ‘incident-update.txt’ in to ‘incident-update.py’. Open the file ‘command.txt’ and add your required commands which need to be run on networking device.. Run the program from command prompt using ‘ python incident-update.py’ . Please provide your input and test . Please ensure you have the reach-ability to service-now instance and network devices from your machine.

Program screen shot

——————- advertisements ——————-

———————————————————-

Service-now screen shot

You could see service now incident notes updated with command output automatically

Hope this will ease your life a bit.. 🙂

Please comment below if you would require customized script based on your requirement which will support multiple device model like Cisco ASA, Juniper, Palo Alto, Checkpoint etc.