Problem this snippet solves:
This sample PowerShell script illustrates how to use the methods in the LocalLB::Pool interface to get and set the Ratio and Priority for a Pool Member.
Note, this example uses the new pool member methods in the LocalLB Pool interface introduced in BIG-IP v11.0
Code :
#----------------------------------------------------------------------------
# The contents of this file are subject to the "END USER LICENSE AGREEMENT 
# FOR F5 Software Development Kit for iControl"; you may not use this file 
# except in compliance with the License. The License is included in the 
# iControl Software Development Kit.
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
# the License for the specific language governing rights and limitations
# under the License.
#
# The Original Code is iControl Code and related documentation
# distributed by F5.
#
# The Initial Developer of the Original Code is F5 Networks, Inc. 
# Seattle, WA, USA. Portions created by F5 are Copyright (C) 1996-2012
# F5 Networks, Inc. All Rights Reserved.  iControl (TM) is a registered 
# trademark of F5 Networks, Inc.
#
# Alternatively, the contents of this file may be used under the terms
# of the GNU General Public License (the "GPL"), in which case the
# provisions of GPL are applicable instead of those above.  If you wish
# to allow use of your version of this file only under the terms of the
# GPL and not to allow others to use your version of this file under the
# License, indicate your decision by deleting the provisions above and
# replace them with the notice and other provisions required by the GPL.
# If you do not delete the provisions above, a recipient may use your
# version of this file under either the License or the GPL.
#----------------------------------------------------------------------------
param (
  $BIGIP = $null,
  $User = $null,
  $Pass = $null,
  $Pool = $null,
  $Member = $null,
  $Ratio = $null,
  $Priority = $null
)

#-------------------------------------------------------------------------
# function Show-Usage
#-------------------------------------------------------------------------
function Show-Usage()
{
  Write-Host @"
Usage: PoolMemberRatioPriority.ps1 BIGIP User Pass Pool Member Ratio Priority
Examples
  .\PoolMemberRatioPriority.ps1 -BIGIP bigip -User user -Pass pass : list pools
  .\PoolMemberRatioPriority.ps1 -BIGIP bigip -User user -Pass pass -Member ipport : list pool members
  .\PoolMemberRatioPriority.ps1 -BIGIP bigip -User user -Pass pass -Member ipport -Ratio 5 : set member ratio to 5
  .\PoolMemberRatioPriority.ps1 -BIGIP bigip -User user -Pass pass -Member ipport -Priority 3 : set member priority to 3
"@
  exit;
}



#----------------------------------------------------------------------------
function Do-Initialize()
#----------------------------------------------------------------------------
{
  if ( (Get-PSSnapin | Where-Object { $_.Name -eq "iControlSnapIn"}) -eq $null )
  {
    Add-PSSnapIn iControlSnapIn
  }
  $success = Initialize-F5.iControl -HostName $BIGIP -Username $User -Password $Pass;
  
  return $success;
}

function Parse-AddressPort()
{
  param($Value);
  $tokens = $Value.Split(":");
  $r = New-Object iControl.CommonAddressPort;
  $r.address = $tokens[0];
  $r.port = $tokens[1];
  $r;
}

function Get-Pools()
{
  (Get-F5.iControl).LocalLBPool.get_list();
}

function Get-PoolMembers()
{
  param(
    $Pool = $null
  );
  $MemberListAofA = (Get-F5.iControl).LocalLBPool.get_member_v2( @($Pool) );
  $MemberListA = $MemberListAofA[0];
  $MemberListA;
}

function Get-PoolMemberDetails()
{
  param(
    $Pool = $null,
    $Member = $null
  );
  
  $AddrPort = Parse-AddressPort $Member;
  
  $RatioAofA = (Get-F5.iControl).LocalLBPool.get_member_ratio(
    @($Pool),
    @( @($AddrPort) )
  );
  
  $PriorityAofA = (Get-F5.iControl).LocalLBPool.get_member_priority(
    @($Pool),
    @( @($AddrPort) )
  );
  
  $ratio = $RatioAofA[0][0];
  $priority = $PriorityAofA[0][0];
  
  "Pool '$Pool' member '$Member' ratio '$ratio' priority '$priority'";
  
}

function Set-PoolMemberDetails()
{
  param(
    $Pool = $null,
    $Member = $null,
    $Ratio = $null,
    $Priority = $null
  );

  $AddrPort = Parse-AddressPort $Member;
  
  if ( $null -ne $Ratio )
  {
    (Get-F5.iControl).LocalLBPool.set_member_ratio(
      @($Pool),
      @( @($AddrPort) ),
      @($Ratio)
    );
  }
  if ( $null -ne $Priority )
  {
    (Get-F5.iControl).LocalLBPool.set_member_priority(
      @($Pool),
      @( @($AddrPort) ),
      @($Priority)
    );
  }
}

#-------------------------------------------------------------------------
# Main Application Logic
#-------------------------------------------------------------------------

if ( ($BIGIP -eq $null) -or ($User -eq $null) -or ($Pass -eq $null) )
{
  Show-Usage;
}

if ( Do-Initialize )
{
  if ( $Pool -eq $null ) 
  {
    # List Pools
    Get-Pools;
  }
  elseif ( $Member -eq $null )
  {
    # List Pool Members
    Get-PoolMembers -Pool $Pool;
  }
  elseif ( ($Ratio -eq $null) -and ($Priority -eq $null) )
  {
    # List Pool Member Details
    Get-PoolMemberDetails -Pool $Pool -Member $Member;
  }
  else
  {
    # Set Ratio and/or Priority
    Set-PoolMemberDetails -Pool $Pool -Member $Member -Ratio $Ratio -Priority $Priority;
    Get-PoolMemberDetails -Pool $Pool -Member $Member;
  }
}
else
{
  Write-Error "ERROR: iControl subsystem not initialized"
}
PowerShell PoolMember Ratio And Priority
