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ml4den_387195's avatar
ml4den_387195
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Mar 28, 2019

How to address multiple BIG-IP servers in one Ansible task?

How to address multiple BIG-IP servers in one Ansible task?

Ansible noob here, I'm trying to automate the configuration of large numbers of pools (and other things) using Ansible.

I have a hosts file that just contains a group of two BIG-IPs:

[f5lab]
f5-1-hostname
f5-2-hostneme

I have a very simple playbook:

  name: Create a pool
  hosts: f5lab
  connection: local

tasks:
   - name: Create app1 server pool
     bigip_pool:
      name: app1_pl
      monitors: "/Common/http"
      lb_method: round-robin
      password: "adminpassword"
      server: f5-1-hostname
      user: "adminuser"
      validate_certs: no
     delegate_to: localhost

This works fine, but will only create the pool on the one server. I'm trying to find out how to essentially loop through my group of hosts without having to write the same task for each one. The server argument is mandatory for the bigip_pool task, so I can't remove it and have it use the playbook hosts. What is the best procedure for this? Thanks!

  • Resolved: the answer is to use the "inventory_hostname" variable like this:

    tasks:
       - name: Create app1 server pool
         bigip_pool:
          name: app1_pl
          monitors: "/Common/http"
          lb_method: round-robin
          password: "adminpassword"
          server: "{{inventory_hostname}}"
          user: "adminuser"
          validate_certs: no
         delegate_to: localhost
    

    This will cause Ansible to loop through the servers in the inventory/hosts group that we pass it. In my case the group is called "f5lab".

3 Replies

  • With Ansible, you can create an Inventory file that stores variables for use in your playbooks. As you can see in this guide, you can create this Inventory file and then specify the host group you want to run the tasks on in the playbook.

     

    If you have any more questions, I am sure I can help.

     

  • Resolved: the answer is to use the "inventory_hostname" variable like this:

    tasks:
       - name: Create app1 server pool
         bigip_pool:
          name: app1_pl
          monitors: "/Common/http"
          lb_method: round-robin
          password: "adminpassword"
          server: "{{inventory_hostname}}"
          user: "adminuser"
          validate_certs: no
         delegate_to: localhost
    

    This will cause Ansible to loop through the servers in the inventory/hosts group that we pass it. In my case the group is called "f5lab".

    • Nisarg's avatar
      Nisarg
      Icon for Nimbostratus rankNimbostratus

      Hello,

      I am

      l looking for a help on similar issue. Trying to manage 2 BIG IP Server and tried your method mentioned above. However I am getting an errors.

       

      Regards,

      Nisarg S