pyControl2 Disable Pool Member

Problem this snippet solves:

Summary: This is an example of how to toggle pool members with pycontrol v2. Change the pool name and members list to reflect your environment.

How to use this snippet:

Usage hostname username password

Code :

#!/bin/env python

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import sys
import pycontrol.pycontrol as pc
import time

#Uncomment below to see how to log with pycontrol2/suds
#import logging

# A basic example of how to disable a pool member from pycontrol v.2. This example passes in
#the  'fromurl' keyword as True (default is False), which tells pycontrol
#to fetch the WSDL from the remote BigIP. If you don't pass 'fromurl', you'll
#need to pass in a full path to your local WSDL store on-disk.

POOL = 'test2' # Change this to your pool
members = ['',''] # members to disable

if pc.__version__ == '2.0':
    print "Requires pycontrol version 2.x!"

if len(sys.argv) < 4:
    print "Usage %s ip_address username password" % sys.argv[0]

a = sys.argv[1:]

# The constructor is similar to the original pyControl.
# Note the change from wsdl_files to wsdls, which makes more sense.
b = pc.BIGIP(
        hostname = a[0],
        username = a[1],
        password = a[2],
        fromurl = True,
        wsdls = ['LocalLB.PoolMember'])

# According to the API, we need to pass in a type of
# 'LocalLB.PoolMember.MemberSessionStateSequenceSequence' into this
# method's "session_states" keyword argument. So the flow will go like:
#  1) Create a pool member object (Common.IPPortDefinition).
#  2) Create a session state object (LocalLB.PoolMember.MemberSessionState)
#  3) Add that to a 'sequence'
# We'll use the 'typefactory' to create these types to pass in.

# --------- helper methods below ---------- #

def member_factory(b, member):
    Produces a Common.IPPortDefinition object per member ip:port combination
    object per member ip:port combination. Add these to Common.IPPortDefinitionSequence.

    args: a pycontrol LocalLB.PoolMember object and an ip:port
    combination that you'd like to add.

    ip,port = member.split(':')
    pmem = b.LocalLB.PoolMember.typefactory.create('Common.IPPortDefinition')
    pmem.address = ip
    pmem.port = int(port)
    return pmem

def session_state_factory(b, members):
    Returns session state objects. Returns a list of session state objects with associated
    session_states = []

    # create a type of: 'LocalLB.PoolMember.MemberSessionState'
    # Inside of this type, you'll see that it expects a pool member as an
    # attribute. Let's create that, set our attributes (address, port), and add it to sstate
    # above.

    for x in members:
        sstate = b.LocalLB.PoolMember.typefactory.create('LocalLB.PoolMember.MemberSessionState')
        sstate.member = member_factory(b,x) 
        sstate.session_state = 'STATE_DISABLED'
    return session_states

# The session state sequence object. Takes a list of 'member session state'
# objects.Wrap the members in a LocalLB.PoolMember.MemberSessionStateSequence
sstate_seq = b.LocalLB.PoolMember.typefactory.create('LocalLB.PoolMember.MemberSessionStateSequence')

# 'item' is an attribute that maps to a list of 'Common.IPPortDefinition' objects.
sstate_seq.item = session_state_factory(b, members)

def disable_member(b, session_objects):
    Disable our members in the of session state
        b.LocalLB.PoolMember.set_session_enabled_state(pool_names =
                [POOL], session_states = [sstate_seq])
    except Exception, e:
        print e

def enable_member(b, session_objects):
    Enable our members in the of session state
    #Note how easy it is to simply 'toggle' the session state now that
    #we are dealing with object attributes.
    for x in sstate_seq.item:
        x.session_state = 'STATE_ENABLED'
        b.LocalLB.PoolMember.set_session_enabled_state(pool_names = [POOL],
                session_states = [sstate_seq])
    except Exception, e:
        print e

# ----- Now let's run it all. ---- #

# Create a list of members.
session_objects = session_state_factory(b,members)

# Disable them.
disable_member(b, session_objects)

# Let's confirm it's disabled.

res = b.LocalLB.PoolMember.get_session_enabled_state(pool_names = [POOL])
print "States: %s" % res

# Now let's confirm our session state.
enable_member(b, session_objects)
res = b.LocalLB.PoolMember.get_session_enabled_state(pool_names = [POOL])

print "States: %s" % res
Published Mar 09, 2015
Version 1.0

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