Understand Core Components of Ansible - Playbooks

Your playbook should look something like this:

---
# Software playbook
#

- name: Install required software
  hosts: all

  tasks:
   - yum: 
      name: "{{ packages }}"
      state: present
     vars:
       packages:
        - httpd 
        - git
        - tcpdump
        - php

   - service: 
      name: httpd
      state: started
      enabled: yes

You can then run the command with ansible-playbook software.yml --become

Your playbook should look something like this:

---
# Create required users

- name: Create required users
  hosts: all
  vars:
   usernames:  
    - devs
    - security
    - admins


  tasks:
   - group:
      name: web
      state: present

   - user:
      name: "{{ item }}"
      state: present
      groups: web
      append: yes
     with_items: "{{ usernames }}"

Just like with the last playbook, we'll run it with an ansible-playbook command:

ansible-playbook users.yml --become