Hello NSO Community,
currently I'm supporting NSO pre-sales activities and thereby a question came up from customer side, which I could not directly answer.
For problem analysis and troubleshooting in production environment it would be useful, if one could figure out the configuration changes a service made to devices.
I tested with a simple template based service 'l2vpn' from a former NSO training.
Figuring out the devices modified by a certain existing service instance is quite easy:
admin@ncs# show services l2vpn CE11-to-CE21 modified
modified devices [ PE11 PE21 ]
Just as simple it is to figure out the history of this service instance – all the transactions impacting this service instance:
admin@ncs# show configuration commit list services l2vpn CE11-to-CE21
2019-08-09 09:47:24
SNo. ID User Client Time Stamp Label Comment
~~~~ ~~ ~~~~ ~~~~~~ ~~~~~~~~~~ ~~~~~ ~~~~~~~
1010 10108 admin cli 2019-08-08 17:45:54 l2vpn CE11-to-CE21
1010 10107 admin cli 2019-08-08 17:32:17 l2vpn CE11-to-CE21
1010 10106 admin cli 2019-08-08 17:23:54 l2vpn CE11-to-CE21
In this example the transactions are service instance creation and to changes.
BUT I did not find a way to display the changes these past transactions made on devices PE11 and PE21. How can this be done?
Also I could not find a way to show the portions in current configurations of devices PE11 and PE21 related to service instance CE11-to-CE21.
A workaround is to 'un-deploy' the service instance with 'dry-run'. This shows what will be removed on the devices and therefore is related to the service instance. I suppose, stuff that is shared by multiple service instances, won't show up this way, but I didn't test it. Maybe this could be overcome with option 'ignore-refcount'.
For me this is a quite poor workaround and I hope somebody knows a better / real solution.
As the scenario outlined by the customer is on production environment, device traces are not a solution. And the transactions may have taken place sometime in the past.
Each hint very much appreciated.
Thanks a lot in advance.
