Unable to allocate IP addresses to nodes – “No Management IP”

[Geoff Twardokus]

I am having a problem allocating IP addresses to nodes within my FABRIC networks. Specifically, when I try to assign an available IP address to a node, I get an error like “Node client has no valid management IP” where “client” is the name of my node. However, from the slice configuration, I can see the node in question does indeed have an assigned management IP.

I have repeatedly tried deleting and re-provisioning my slice, but the issue is consistent. I’m a bit stumped because I’ve used identical code in the past and never encountered this issue.

[Komal Thareja]

Hi Geoff,

Just to confirm my understanding — your slice is in StableOK state, and the nodes display IP addresses as shown in your screenshot, but node.execute is failing with a “no management IP” error. Is that correct?

Could you please share your Slice ID here?

Thanks,
Komal

[Geoff Twardokus]

Yes, my slice (8f95cc97-45de-4e5f-97d1-ced2b331936c) is in StableOK state. It is not node.execute that is failing, it is this bit when I try to assign an IP address to the node:

client_net = slice.get_network(name=”client-net”)
client_net_avail_ips = client_net.get_available_ips()
client_interface = client_node.get_interface(network_name=”client-net”)
client_interface.ip_addr_add(addr=client_net_avail_ips.pop(0), subnet=client_net.get_subnet())

The last line above produces the below, ending with “Exception: Node client has no valid management IP.”

————————————————————————–

Exception                                 Traceback (most recent call last)
Cell In[7], line 4
      2 client_net_avail_ips = client_net.get_available_ips()
      3 client_interface = client_node.get_interface(network_name="client-net")
----> 4 client_interface.ip_addr_add(addr=client_net_avail_ips.pop(0), subnet=client_net.get_subnet())

File /opt/conda/lib/python3.11/site-packages/fabrictestbed_extensions/fablib/interface.py:575, in Interface.ip_addr_add(self, addr, subnet)
    566 def ip_addr_add(self, addr, subnet):
    567     """
    568     Add an IP address to the interface in the node.
    569 
   (...)
    573     :type subnet: IPv4Network or IPv4Network
    574     """
--> 575     self.get_node().ip_addr_add(addr, subnet, self)

File /opt/conda/lib/python3.11/site-packages/fabrictestbed_extensions/fablib/node.py:2559, in Node.ip_addr_add(self, addr, subnet, interface)
   2557 except Exception as e:
   2558     logging.warning(f"Failed to add addr: {e}")
-> 2559     raise e

File /opt/conda/lib/python3.11/site-packages/fabrictestbed_extensions/fablib/node.py:2553, in Node.ip_addr_add(self, addr, subnet, interface)
   2550     ip_command = "sudo ip"
   2552 try:
-> 2553     self.execute(
   2554         f"{ip_command} addr add {addr}/{subnet.prefixlen} dev {interface.get_device_name()} ",
   2555         quiet=True,
   2556     )
   2557 except Exception as e:
   2558     logging.warning(f"Failed to add addr: {e}")

File /opt/conda/lib/python3.11/site-packages/fabrictestbed_extensions/fablib/node.py:1520, in Node.execute(self, command, retry, retry_interval, username, private_key_file, private_key_passphrase, quiet, read_timeout, timeout, output_file, display)
   1518 management_ip = self.get_management_ip()
   1519 if not management_ip:
-> 1520     raise Exception(f"Node {self.get_name()} has no valid management IP.")
   1522 # Ensure the node is active
   1523 if self.get_reservation_state() != "Active":

Exception: Node client has no valid management IP.

[Komal Thareja]

Hi Geoff,

This appears to be a bug in fablib. As a workaround, could you please modify the call as follows?

client_interface = client_node.get_interface(network_name="client-net", refresh=True)

This change should prevent the error from occurring. I’ll work on fixing this issue in fablib.

Best,
Komal

[Author]

Posts