[Komal Thareja]

Hello Fengping,

I have re-attached the pci devices for the VMs: node1and node2. You would need to reassign the IP addresses back on them for your links to work. Please let us know if the links are working as expected after configuring the IP addresses.

Thanks,

Komal

[Komal Thareja]

Maintenance is completed. Testbed is open for use.

[Komal Thareja]

GKE cluster issues are resolved, Jupyter Hub is back online. Apologies for the inconvenience!

Thanks,

Komal

[Komal Thareja]

@yoursunny – Thank you for sharing the example scripts. Appreciate it!

@Xusheng – You can use FabNetv4Ext or FabNetv6Ext services as explained here.

Also, we have two example notebooks one each for FabNetv4Ext or FabNetv6Ext available via start_here.ipynb:

• FABNet IPv4 Ext (Layer 3): Connect to FABRIC’s IPv4 internet with external access (manual)
• FABNet IPv6 Ext (Layer 3): Connect to FABRIC’s IPv6 internet with external access (manual)

Thanks,
Komal

[Komal Thareja]

@yoursunny Thank you for sharing your script. We have updated MTU setting across sites and were able to use your script as well for testing. However, with latest fablib changes for performance improvements, the script needed to be adjusted a little bit. Sharing the updated script here.

Thanks,
Komal

[Komal Thareja]

Hi Fengping,

Thank you so much for reporting this issue. There was a bug which led to allocating same subnet to multiple slices. So when a second slice got allocated the same subnet the traffic stopped working for your slice.

I have applied the fix for the bug on production. Could you please delete your slice and recreate it? Apologies for the inconvenience.

Appreciate your help with making the system better.

Thanks,
Komal

[Komal Thareja]

Please try this to create 12 VMs, this shall let you use almost the entire worker w.r.t cores. I will keep you posted about the flavor details.

#Create Slice
slice = fablib.new_slice(name=slice_name)

# Network
net1 = slice.add_l2network(name=network_name, subnet=IPv4Network("192.168.1.0/24"))

node_name = "Node"
number_of_nodes = 12
for x in range(number_of_nodes):
  disk = 500
  if x == 0:
    disk = 4000
  node = slice.add_node(name=f'{node_name}{x}', site=site, cores='62', ram='128', disk=disk)
  iface = node.add_component(model='NIC_Basic', name='nic1').get_interfaces()[0]
  iface.set_mode('auto')
  net1.add_interface(iface)

#Submit Slice Request
slice.submit();

Thanks,
Komal

[Komal Thareja]

With the current flavor definition, I would recommend requesting VMs with the configuration:

cores='62', ram='384', disk='2000'

Anything bigger than this maps to fabric.c64.m384.d4000 and only one of the workers i.e. cern-w1 can accomodate 4TB disks and rest of the worker can at max accomodate 2TB disk. I will discuss this internally to work on providing a better flavor to accomodate your slice.

Thanks,

Komal

P.S: I was able to successfully create a slice with the above configuration.

• This reply was modified 1 year, 9 months ago by Komal Thareja.

[Komal Thareja]

I looked at the instance types, please try setting the core='62', ram='384', disk='100'

FYI: https://github.com/fabric-testbed/InformationModel/blob/master/fim/slivers/data/instance_sizes.json this might be useful for VM sizing.

Thanks,

Komal

[Komal Thareja]

I looked at your slices and found that you have 2 Dead Slices and 6 Closing Slices. All the slices are requesting VMs on a single site CERN. All the Slice requests are requesting either 120 or 60 cores. Regardless of the disk size, for core/ram requested these are mapped to the following flavors. Considering that there are other slices also on CERN site, your slice cannot be accommodated by single CERN site. Please consider either spanning your slice across multiple sites or reducing the size of the VM not only w.r.t disk but also cores/ram.

We currently only have a limited number of flavors and your core/ram request is being mapped to a huge disk.

core: 120 , ram: 480 G, ==>  fabric.c64.m384.d4000

core: 60 , ram: 360 G,  ==> fabric.c60.m384.d2000

NOTE: No manual cleanup is needed the software is behaving as designed.

Thanks,

Komal

[Komal Thareja]

Hi Fengping,

Your second slice failed with the error: Insufficient resources as depicted below. Please note that slice deletion is not synchronous, it may take some time for all the resources associated with a slice to be deleted. Please consider adding slight delay between subsequent slice creation attempts if both the slices are requesting resources from the same site which might not have been released yet by the first slice.

Resource Type: VM Notices: Reservation 113cd41c-26df-461e-8dc9-f93ed92fcebf (Slice ServiceXSlice(66a78e70-ecf2-41e7-be12-740561904991) Graph Id:cc871ebc-e290-4b44-ab36-046d3cd2da00 Owner:fengping@uchicago.edu) is in state (Closed,None_) (Last ticket update: Insufficient resources : ['disk'])

 

For the second slice, you can view the failure reasons from the portal, by select the check box ‘Include Dead/Closed Slices`.

Please try creating the slice again and let us know if you still see errors.

 

Thanks,

Komal

• This reply was modified 1 year, 9 months ago by Komal Thareja.

[Komal Thareja]

Sorry, for not indicating this before, you can restart the container from File -> Hub Control Panel -> Stop My Server, then logout and login.

[Komal Thareja]

Could you please remove the entries for fabrictestbed-extensions from ~/work/fabric_config/requirements.txt and restart your container? Please try your notebooks after the restart.

Thanks,

Komal

[Komal Thareja]

Hello Acheme,

Could you please share the output of the following commands? Also, which container are you using?

pip list | grep fabric

cat ~/work/fabric_config/requirements.txt

Thanks,

Komal

[Komal Thareja]

Hello Thushari,

We are looking into this and have found that in a race condition when list_resources times out, you may observe the output as shared by you. We are debugging this and would work on a fix. In the meanwhile, could you please explicitly pass a site name when adding a node to your slice and try it?

Also, please try both 1.4.6 and 1.5.1 containers and let us know if it works for any of the options.

Thanks,

Komal

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