Support for load balancing profile

A load balancing configuration has a large number of parameters, so setting the same parameters on a number of virtual servers can become tedious. From release 11.1, a load balancing (LB) profile makes this task easier. You can now set load balancing parameters in a profile and associate this profile with virtual servers, instead of setting these parameters on each virtual server.

The following parameters are presently supported in an LB profile:

  • HTTPonlyflag—Include the HttpOnly attribute in persistence cookies. The HttpOnly attribute limits the scope of a cookie to HTTP requests and helps mitigate the risk of cross-site scripting attacks.
  • UseSecuredPersistenceCookie—Encrypt the persistence cookie values by using a SHA2 hash algorithm.
  • Cookiepassphrase—Specify the passphrase used to generate a secured persistence cookie value.
  • DBS_LB—Enable database specific load balancing for MySQL and MSSQL service types.
  • Cl_process_local—Packets destined to a virtual server in a cluster are not steered. Enable option for single packet request response mode or when the upstream device is performing a proper RSS for connection based distribution.

Note

You can set DBS_LB and Cl_process_local parameters on a virtual server and in the profile. If you enable these parameters on a virtual server and then set a profile to this virtual server, the parameters appear as disabled in the output of the “show lb vserver” command for that virtual server. Check the profile to see the actual status of these parameters. In addition, if you set and then unset a profile to a virtual server, the parameters  will be set with default values for that virtual server.

To create an LB profile by using the CLI

At the command prompt, type:

add lb profile <lbprofilename> -dbsLb ( ENABLED | DISABLED ) -processLocal ( ENABLED | DISABLED ) -httpOnlyCookieFlag ( ENABLED | DISABLED ) -cookiePassphrase -useSecuredPersistenceCookie ( ENABLED | DISABLED )

Example:

add lb profile p1

Done

show lb profile p1

LB Profile name:                 p1

DBS LB : DISABLED        Process Local: DISABLED

Persistence Cookie HttpOnly Flag: ENABLED

Use Secured Persistence Cookie Flag: DISABLED

No of vservers bound: 0

Done

To create an LB profile by using the GUI

Navigate to System > Profiles > LB Profile, and add a profile.

To associate an LB profile with an LB virtual server by using the CLI

At the command prompt, type:

set lb vserver <name> -lbprofilename <string>

Example

set lbvserver lbvip1 -lbprofile p1

Done

sh lb vserver lbvip1

lbvip1 (203.0.113.1:80) - HTTP       Type: ADDRESS
State: UP
Last state change was at Wed May 25 12:36:20 2016
Time since last state change: 0 days, 00:01:26.140
Effective State: UP  ARP:DISABLED
Client Idle Timeout: 180 sec
Down state flush: ENABLED
Disable Primary Vserver On Down : DISABLED
Appflow logging: ENABLED
Port Rewrite : DISABLED
No. of Bound Services :  2 (Total)       2 (Active)
Configured Method: LEASTCONNECTION      BackupMethod: ROUNDROBIN
Mode: IP
Persistence: NONE
Vserver IP and Port insertion: OFF
Push: DISABLED  Push VServer:
Push Multi Clients: NO
Push Label Rule: none
L2Conn: OFF
Skip Persistency: None
Listen Policy: NONE
IcmpResponse: PASSIVE
RHIstate: PASSIVE
New Service Startup Request Rate: 0 PER_SECOND, Increment Interval: 0
Mac mode Retain Vlan: DISABLED
DBS_LB: DISABLED
Process Local: DISABLED
Traffic Domain: 0
LB Profile: p1
Done

To associate an LB profile with an LB virtual server by using the GUI

  1. Navigate to Traffic Management > Load Balancing > Virtual Servers.
  2. Select a virtual server, and click Edit.
  3. In Advanced Settings, click Profiles.
  4. In the LB Profile list, select the profile to associate with this virtual server.