ansible

Playbooks are a combination of Plays
Plays are combination of which remote devices will I be acting on and which actions to take.
Plays can have multiple actions/tasks

### Example playbook might look like this ###
---
- hosts: localhost
  vars:
    hostname: pynet-rtr1
  tasks:
    - name: Generate configuration file
      template: scr=/home/myuser/ansible/templates/router.j2
                dest=/home/myuser/ansible/configs/router.txt
                
- hosts: webservers
  tasks:
    - name: do something
      some_action
      
      
### Ansible Host File ###
/etc/ansible/hosts  # this is the default location

# In the file if you want to not enable an ssh connection to local host do the following
[local]
localhost ansible_connection=local

### To execute ansible actions ###
ansible local -m ping  # this tests the local group reachability
ansible localhost -m ping  # this tests a specific host
ansible-playbook router.yml --check  # check tests for any changes that will be made in advanced

### Ansible Roles ### 5 min mark on week 5 ansible 2 video
# Folder Structure
  > main_ansible_folder
    - site.yml  # can be used to execute many different roles
   > router  # this can be any name to describe the role
        > tasks
          - main.yml
        > templates
          - mytemplate.j2
        > vars
          - main.yml

# Example main.yml for a specific role
---
- name: Generate Config File
  template: src=mytemplate.j2 dest=/home/myuser/ansible/configs/{{item.hostname}}.txt
  with_items: test_routers
  
# test_routers definition can be located here
../router/vars/main.yml