Load balancing between node pools

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1

I have 2 nodes configured under pool , with least connection , the requirement is to send traffic for one of the pool members and after 3 hour stop sending traffic  to the first one and switch to the second pool member. Load balance/rotate every 3 hour between both pool members.

Looking for any automation or script to implement this

2

Hi @ajay1986 ,

i assume that you refer to a BIG-IP platform, correct ?

you mention script or automation as an option, so i assume that having an iRule will not be okay to cover your need.

I would recommend creating 2 pools with different weight:

pool 1 - member A prio 100, member B prio 50

pool 2 - member A prio 50, member B prio 100

with the automation, you switch from one pool to the other every 3 hours (it can be an iCall running locally on the BIG-IP).

In that case, if one of your pool member is failing (server down, upgrade, …) you still work on the remaining pool.

If the idea of running an iCall locally seems ok, let me know, i can send you an example. If you want something external (using API calls, ANSIBLE, Terraform, …) let me know.

This can be achieved with 1 pool and changing the pool members prio from automation too.

regards

3

Thanks for the reply Philippe , it would be great if you can help with ansible script.

4

Hi @ajay1986 , here after an example of Ansible Playbook that can be used to do the equivalent config change (look specially at the “priority group” values in the items list of pool members

---
- name: Create a VIP, pool and pool members
  hosts: all
  connection: local

  vars:
      provider:
         password: "MyPassword"
         server: 12.34.45.56
         user: admin
         validate_certs: no
         server_port: 443

  tasks:
     - name: Create a pool
       bigip_pool:
         provider: "{{ provider }}"
         lb_method: ratio-member
         name: web
         slow_ramp_time: 120
         priority_group_activation: 1
       delegate_to: localhost

     - name: Add members to pool
       bigip_pool_member:
         provider: "{{ provider }}"
         description: "webserver {{ item.name }}"
         host: "{{ item.host }}"
         name: "{{ item.name }}"
         priority_group: "{{ item.priority_group }}"
         pool: web
         port: 80
       with_items:
         - host: 10.10.10.10
           name: web01
           priority_group: 10
         - host: 10.10.10.20
           name: web02
           priority_group: 1
       delegate_to: localhost