Retrieve core-dumps from Backup RE

[zack...@nera.net]

Hi,

Not sure if anyone had worked on this yet.

Has anyone successfully tried to list & SCPout the core-dumps residing on the backup routing engine ?

Thanks,

Zack

[Nitin Kumar]

Hi,

 

If you have the IP of backup RE, you can connect to Backup RE and call the rpc (get-system-core-dumps) to give you the details of core dumps.

Also you can use SCP util module to transfer the file

https://github.com/vnitinv/pyez-examples/blob/master/12_utils_scp.py

 

If you don’t have IP of the bacup RE, you can use StartShell utils to login onto backup RE (from master) and run the commands.

 

with StartShell(dev) as ss:

         if ss.run('cli', '> ')[0]:

             if ss.run('request routing-engine login other-routing-engine', '> ')[0]:

                 print 'logged into other re'

                 data = ss.run(“show system core-dumps”, '> ')

                 print data

 

Thanks

Nitin Kr

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[Zack Toh]

Hi,

 

                IP of the backup RE is not available based on the requirements I need to code on. L The below set of codes works but I cant find any means extract out the “paths” of the core dumps in order to run the scp to the master RE.

 

Tried to use re.match but not workable. If there is a means to properly “dissect” the data out, this could properly work.

[Nitin Kumar]

You should use re.search

Thanks

Nitin Kr

Sent from mobile, please excuse my brevity 

[Zack Toh]

Hi,

 

                Re.search does not work out well too sadly. I guess that’s because apart from pyez, the whole output comes in a whole set rather than per line.

 

                Trying to figure it out. If there is a way to know what is the various core-dumps available on the backup RE, there should be a way to scp it from backup RE to master RE so to scp it out to the server for troubleshooting purposes. J

 

CODE

with StartShell(deve) as ss:

        if ss.run('cli','>'):

                if ss.run('request routing-engine login other-routing-engine'):

                        data = ss.run("show system core-dumps")

                        for a in data:

                                a = str(a)

                                if re.search("No such file",a):

                                        print a

                                        print "Break"          

 

OUTPUT

show system core-dumps

-rwxrwxrwx  1 root  wheel        269 Dec 14 18:51 /var/crash/TTKjamescoreTTK.txt*

/var/tmp/*core*: No such file or directory

/var/tmp/pics/*core*: No such file or directory

/var/crash/kernel.*: No such file or directory

/var/jails/rest-api/tmp/*core*: No such file or directory

total files: 1

 

Thanks & Regards,
Bing Zhong (Zack)

Telephone: +65 63800216

 

Nera Telecommunications Ltd

109 Defu Lane 10 Singapore 539225

 

[Nitin Kumar]

Hi Bing,

 

You can use rpc way to collect data from Backup re also and then parse xml object for the data.

 

from jnpr.junos import Device
from lxml import etree

dev = Device(host="xxxx", user="xxxx", password="xxxx”)
dev.open()
op = dev.rpc.get_system_core_dumps(routing_engine='backup')
print etree.tostring(op)

 

StartShell code too work fine for me with latest code:

 

with StartShell(dev) as ss:
    if ss.run('cli', '>'):

        if ss.run('request routing-engine login other-routing-engine'):

            data = ss.run("show system core-dumps", "> ")[1] # ss.run return something like (True, 'dataaaaaa')
            for line in data.splitlines():
                if re.search('No such file', line):
                    print line

 

Thanks

Nitin Kr