Use iControl API to query for node list for IP verification and hostname resolve.

Hello,

to start you can take this example which is doing pool listing : https://devcentral.f5.com/wiki/iControl.pyControlGetPools.ashx

and change everywhere LocalLB.Pool by LocalLB.NodeAddressV2

that will give you the Node listing part.

Also, you are going to need to specify each partition and get the list for it seperately. Management.Folder.get_list will give you all of the partitions(or just create a static list in python with their names), and System.Session.set_active_folder to change the folder you are in.

I'd also recommend bigsuds over pycontrol. If I have time later I will see if I can put together a sample script.

See below. You'll need to download bigsuds and install it. I don't have nodes in multiple partitions so I cannot confirm that part, but it should work. the script will leave you with a python list(all_nodes) that contains the IP address of all the nodes on the device(in the given partition list)

import bigsuds

hostname = "hostname"
username="username"
Password="password"


b = bigsuds.BIGIP(
    hostname = hostname,
    username = username,
    password = password,
    )

b2 = b.with_session_id()

folders = ['/Common', '/SecondPartition']

all_nodes = []

for f in folders:
    b2.System.Session.set_active_folder(f)
    node_list = b2.LocalLB.NodeAddressV2.get_list()
    node_address = b2.LocalLB.NodeAddressV2.get_address(node_list)
    all_nodes.extend(node_address)

Hi,

I am using bigsuds and creating pools directly which in turn creates the nodes (since i cannot seem to create nodes and then pools because it complains about the nodes already existing if you try to create a pool out of already existing nodes !). The problem is that the Pool Member IP field in the structure {'address':'10.10.10.1', 'port':80} of the LocalLB.Pool.create_v2 method becomes the name of the node. So when i check the config utility, the node name and address are the same - 10.10.10.1

How can resolve this issue? Would really appreciate any help. Change the node names after creating the pools, if thats possible.

Thanks!

You can create pools out of existing nodes. The 'address' should be the Web UI 'name'

b.LocalLB.Pool.create_v2([pool_name],[lb_method],[pool_members])

where pool_members = {'address' : '/Common/nodename' , 'port' : 443}

Awesome. That works ! Thank you mimlo.

You can use set_recursive_query_state so that get_list() returns nodes from all folders.

In case you are considering a plain tmsh based solution the following approach may help as well:

 tmsh -q -c "cd /; list ltm node recursive one-line"
ltm node Common/CommonNode_181 { address 10.131.131.181 }
ltm node partitionA/partionA_Node_182 { address 10.131.131.182 partition partitionA }
ltm node partitionB/partionB_Node_183 { address 10.131.131.183 partition partitionB }

 tmsh -q -c "cd /; list ltm node recursive one-line" | awk '{print $3}'
Common/CommonNode_181
partitionA/partionA_Node_182
partitionB/partionB_Node_183


 tmsh -q -c "cd /; list ltm node recursive one-line" | awk -F '[ /]' '{print $4}'
CommonNode_181
partionA_Node_182
partionB_Node_183

Thank, Stephan