f5 and ansible

First looks like you have an issue gathering facts, worth setting this to

False

Then I would setup and use a variable as the

provider

I have not testing the following

ansible playbook

---
- name: Add Route Domain ID 1234
  hosts: bigip
  connection: local
  gather_facts: False

  vars:
    f5Provider:
      server: "{{inventory_hostname}}"
      server_port: 443
      user: "brettcarr"
      password: "my password"
      validate_certs: no
      transport: rest

  tasks:
    - name: Create a route domain 
      bigip_routedomain:
        provider: "{{f5Provider}}"
        id: "1234"
        state: "present"
      delegate_to: localhost

Make sure you have ansible version 2.2 or above and the python F5 SDK (

f5-sdk