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

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.

Hi Komal – I tried your fix, but I’m unfortunately getting the same error (I deleted and rebuilt the slice just to make sure it was carrying over from before).

Do you have any other suggestions in the meantime?

I figured it out! It turns out that when I did this:

client_node = slice.add_node(name=”client”, site=site1, image=’default_ubuntu_22′)

And then later did this:

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

It had not updated the client node with the IP information from the slice. I needed to reload that node variable before I tried messing with the network interfaces:

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

Once I added this line, the problem disappeared. So, I guess it’s not a bug in fablib, although it would probably be helpful if there was some warning or something in the documentation about this.

Thanks!