Cannot iterate over interfaces on a network in FABlib v1.9.0

[Peter Willis]

The following code and FabLib calls worked in v1.8.0:

for network in slice.get_networks():
print("NETWORK:")
print(f"\t{network}")
for intf in network.get_interfaces():
print("INTERFACES:")
print(f"\t{intf}")

But, when running in v1.9.0, intf is always a blank list. If you grab the interfaces directly (get_interfaces()), it works fine. I haven’t dug into the source code on GitHub yet, but I figured I’d ask first to see if I’m working with deprecated functions or something like that.

• This topic was modified 2 months, 3 weeks ago by Peter Willis.

[Komal Thareja]

Hi Peter,

Possibly a bug, however, I tried doing this with my existing slice and it seems to work.

Is there a specific sequence in which you are running this code? Just trying to reproduce this on my end.

Code Snippet of my trials:

from fabrictestbed_extensions.fablib.fablib import FablibManager as fablib_manager
from ipaddress import ip_address, IPv4Address, IPv6Address, IPv4Network, IPv6Network
fablib = fablib_manager()
slice = fablib.get_slice(slice_name)
for nw in slice.get_networks():
print(nw)
for ifc in slice.get_interfaces():
print(ifc)

Thanks,

Komal

 

P.S: we did roll out some improvements w.r.t to how often the interfaces are updated to limit the number of ssh connections.

• This reply was modified 2 months, 3 weeks ago by Komal Thareja.

[Peter Willis]

In my case, it’s specifically when iterating over the interfaces on a given network, so slice.get_interfaces() works fine, but nw.get_interfaces() and using that to iterate over the interfaces of nw would not work.

[Nirmala Shenoy]

hello Komal,

we are configuring IP addresses in an OSPF network. so the link that is common to a pair of nodes is given the same network address.

I tried the script with f

for ifc in slice.get_interfaces():

the addressing assignment is going wrong.

can you please suggest how we can fix this?

 

thanks

 

[Komal Thareja]

Hi Nirmala,

Could you please try using the fablib from this branch: https://github.com/fabric-testbed/fabrictestbed-extensions/tree/rel1.9.1 ?

nw.get_interfaces() should work now.

I plan to push this main branch Monday. I’ll keep you posted.

Please let me know if this resolves the issue.

Thanks,

Komal

1 user thanked author for this post.

Peter Willis

[Peter Willis]

I gave it a try and then went back to 1.9.0 to double-check. It is working as intended in 1.9.1. Thank you!

[Nirmala Shenoy]

thanks a lot Komal. peter checked it and looks like it worked. I will be trying it now .

[Komal Thareja]

Hi Nirmala/Peter,

fabrictestbed-extensions==1.9.1 is pushed to pypi and available in Bleeding Edge JH container.

This version contains the fix for the get_interfaces.

Thanks,

Komal

[Nirmala Shenoy]

Thanks Komal,

the fix that Peter used was to download the 1.9.1 version from the github by changing the requirements.txt in fabric_config.

do we need to do anything else to get the updated 1.9.1 version that you state above?

 

thanks

Nirmala

[Komal Thareja]

Peter’s fix should still work Nirmala!

Thanks,

Komal

[Nirmala Shenoy]

OK Komal  thanks

 

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