Automation

Hi all,

I wrote a script that saves the configuration of an mx960 on a remote server when an operator gives the command "op copyconf.py".

I would like the script to automatically take the ip of the master fxp0 from the local configuration and then be able to use it as the scp source.

I can't understand which method to use ... in all the documentation I read about Pyez, but I can't get it to work on the local configuration. I suppose it works only  for remote connections or am I wrong?

simone@LAB-RE0> show configuration groups re0 interfaces fxp0 unit 0 family inet | display xml 
<rpc-reply xmlns:junos="http://xml.juniper.net/junos/19.1R0/junos">
    <configuration junos:commit-seconds="1593435526" junos:commit-localtime="2020-06-29 14:58:46 CEST" junos:commit-user="simone">
            <groups>
                <name>re0</name>
                <interfaces>
                    <interface>
                        <name>fxp0</name>
                        <unit>
                            <name>0</name>
                            <family>
                                <inet>
                                    <address>
                                        <name>192.168.23.23/28</name>
                                    </address>
                                    <address>
                                        <name>192.168.23.25/28</name>
                                        <master-only/>
                                    </address>
                                </inet>
                            </family>
                        </unit>
                    </interface>
                </interfaces>
            </groups>
    </configuration>
    <cli>
        <banner>{master}</banner>
    </cli>
</rpc-reply>

I'm interested in taking the IP 192.168.23.25 and putting it in a variable.

Thanks for help.

Hi simonev, 

Greetings, 

To answer your first part, how to fetch the fxp IP you could use something like below : 

from jnpr.junos import Device
from lxml import etree

with Device(host='router.example.com', use_filter=True) as dev:
    sax_input = '<interface-information><physical-interface><name/></physical-interface></interface-information>' >>Use relevant xml tag, address in our case.
    result = dev.rpc.get_interface_information(filter_xml=sax_input) 
    print (etree.tostring(reply, encoding='unicode'))

Link: https://www.juniper.net/documentation/en_US/junos-pyez/topics/task/program/junos-pyez-xml-parser-specifying.html

Hope this helps. 
Mark "Accept as solution" if this answers your query.  Kudos are appreciated too! 

Regards, 

Sharat Ainapur

HI Sharat,

I had to adapt and change my target. Now in my script I have: 

root@LAB-RE0:/var/db/scripts/op # more copyconf.py
from jnpr.junos import Device
from lxml import etree
import jxmlease
import json
from junos import Junos_Configuration
import jcs

def main():
   dev = Device()
    dev.open()

    filter = '<system><ntp><source-address></source-address></ntp></system>'            
    data = dev.rpc.get_config(filter_xml=filter, options={'format':'set'}) 
    print (etree.tostring(data, encoding='unicode', pretty_print=True))  
    dev.close()


if __name__ == "__main__":
    main()
	

when I run it I have this result:

root@LAB-RE0> op copyconf.py    
<configuration-set>
set system ntp source-address 192.168.23.25
</configuration-set>

OK, now How can I extrapolate only the ip '192.168.23.25' and insert it in a variable?

Thanks

Hi

You can use the following to only get the IP address from the set command output:

from jnpr.junos import Device
from lxml import etree
import jxmlease
import json
from junos import Junos_Configuration
import jcs

def main():
dev = Device()
dev.open()

filter = '<system><ntp><source-address></source-address></ntp></system>'
data = dev.rpc.get_config(filter_xml=filter, options={'format':'set'})

#print (etree.tostring(data, encoding='unicode', pretty_print=True))
dev.close()
data=data.text
data=data.split(" ")
data=data[4]
print data

if __name__ == "__main__":
main()

Hope this helps

Instead of parsing large get_config you can try following script:

rsp = dev.rpc.get_interface_information(interface_name='fxp0', terse=True)
I = rsp.xpath("//ifa-local")[0].text                               #Variable with FXP0 IPaddress with mask
i = I.split("/")[0]                                                            #Spliting and capturing only IP address

Thank you,
this is also a working solution! I thought I'd use it in case I wasn't able to get the master fxp0's ip.