Not able to create slice

[Amanda Tomlinson]

I have a simple notebook where I create the fablib_manager, check to see the environment variables are loaded with fablib.show_config(), then I try to create a slice with:

slice = fablib.new_slice(name=slice_name)

Which does not fail. However, trying to add nodes or manipulate the slice fails with the error message: “Exception: ‘NoneType’ object has no attribute ‘project_id'”

When I call slice.show(), I get the following stack trace:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[5], line 1
----> 1 slice.show()

File ~/fabric/venv/lib/python3.10/site-packages/fabrictestbed_extensions/fablib/slice.py:170, in Slice.show(self, fields, output, quiet, colors, pretty_names)
    141 def show(
    142     self, fields=None, output=None, quiet=False, colors=False, pretty_names=True
    143 ):
    144     """
    145     Show a table containing the current slice attributes.
    146 
   (...)
    167     :rtype: Object
    168     """
--> 170     data = self.toDict()
    172     def state_color(val):
    173         if val == "StableOK":

File ~/fabric/venv/lib/python3.10/site-packages/fabrictestbed_extensions/fablib/slice.py:488, in Slice.toDict(self, skip)
    476 def toDict(self, skip=[]):
    477     """
    478     Returns the slice attributes as a dictionary
    479 
    480     :return: slice attributes as dictionary
    481     :rtype: dict
    482     """
    483     return {
    484         "id": str(self.get_slice_id()),
    485         "name": str(self.get_name()),
    486         "lease_end": str(self.get_lease_end()),
    487         "lease_start": str(self.get_lease_start()),
--> 488         "project_id": str(self.get_project_id()),
    489         "state": str(self.get_state()),
    490     }

File ~/fabric/venv/lib/python3.10/site-packages/fabrictestbed_extensions/fablib/slice.py:864, in Slice.get_project_id(self)
    857 def get_project_id(self) -> str:
    858     """
    859     Gets the project id of the slice.
    860 
    861     :return: project id
    862     :rtype: String
    863     """
--> 864     return self.sm_slice.project_id

AttributeError: 'NoneType' object has no attribute 'project_id'

 

It looks like all of my environment variables are correct. I generated a token right before running the code. My notebook is:

from fabrictestbed_extensions.fablib.fablib import FablibManager as fablib_manager

fablib = fablib_manager(fabric_rc="/path/to/fabric_rc")
fablib.show_config() # looks correct

try:
slice = fablib.new_slice(name=slice_name)
except Exception as e:
print(e)

slice.show() # error

 

• This topic was modified 11 months, 3 weeks ago by Amanda Tomlinson.

[yoursunny]

The entire FABRIC is red this week: https://portal.fabric-testbed.net/resources/all

See notice here: https://learn.fabric-testbed.net/forums/topic/multi-day-fabric-maintenance-january-1-5-2024/

Look at this part:

On other sites, slices will continue running, and slivers will be accessible during the maintenance, however, we will place the testbed in maintenance mode between Jan 1-5, therefore it will not be possible to perform slice operations (create, extend, delete).

[Mert Cevik]

FABRIC is under maintenance. Details are on https://learn.fabric-testbed.net/forums/topic/multi-day-fabric-maintenance-january-1-5-2024/

[Amanda Tomlinson]

Thank you both. I’m still unable to create slices today. I’ve re-generated my fabric token but I’m getting the same error as above. Is there anything else I need to do now that the maintenance is complete?

[Mert Cevik]

Hello Amanda,

Can you check the information on https://learn.fabric-testbed.net/forums/topic/fabric-testbed-is-open-and-ready-for-use/

about the requirements.txt file and fablib update (fabrictestbed-extensions) ?

[Paul Ruth]

One thing to check…. Does your notebook contain an unmodified version of this line?:

fablib = fablib_manager(fabric_rc="/path/to/fabric_rc") 

If it does, you need to modify the path to point to your actual fabric_rc file.

Paul

[Amanda Tomlinson]

Thanks for the responses. I have updated to the latest version of fablib extensions, and I don’t have a requirements.txt in my environment (that I saw). And I do point to my fabric_rc. I attached a screenshot of my jupiter notebook.

I have also tried restarting the kernel and restarting the jupiter notebook..

[Paul Ruth]

Can you try adding back in the following line and report the output?

fablib.show_config()

• This reply was modified 11 months, 2 weeks ago by Paul Ruth.

[Amanda Tomlinson]

[Amanda Tomlinson]

Also, it looks like I am able to create slices on JupiterHub, which is on version 1.6.0. I can try upgrading if there is a newer release.

[Paul Ruth]

I think I see the issue now.

In your example you have something like:

from fabrictestbed_extensions.fablib.fablib import FablibManager as fablib_manager
fablib = fablib_manager()
slice = fablib.new_slice(name='MySlice')
slice.show()

The problem is that when you are calling slice.show() the slice does not yet exist.  You need to create the slice first.  Add some nodes/networks something like the following:

from fabrictestbed_extensions.fablib.fablib import FablibManager as fablib_manager
fablib = fablib_manager()
slice = fablib.new_slice(name='MySlice')
node = slice.add_node(name='node1', site='STAR', image="default_rocky_8" )
slice.submit()
slice.show()

This should work.  That said, I think you should be able to slice.show() a slice that is only half built and has not been submitted yet.  This is a bug that we will look into.

Let me know if this works for you.

• This reply was modified 11 months, 2 weeks ago by Paul Ruth.

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