Ansible

create virtual environment:

python -m venv introansible
source introansible/bin/activate

install ansible:

pip install ansible
ansible localhost -a "echo 'hi'"

generate keys, and visit them, put public key on the

ssh-keygen -t rsa -b 4096 -o -C xiangxu1105@gmail.com
/User/shawn/.ssh/introAnsible
ls ~/.ssh/ | grep introAnsible

Core Concepts:

1. Modules
2. Tasks
3. Roles
4. Playbooks
5. Inventory

6. YAML

7. What are Ansible Modules?

   Code, typically in Python, provided by Ansible to perform an action.

   Ex:

   • clone a git repo
   • enable the OS' firewall
   • send a notification about a depolymnet
   • What are Ansible tasks?

   YAML instructions that invoke Ansible modules to execution an action

   Ex:

   - name: ensure Git is installed
       apt: name=git-core state=present update_cache=yes
       become: true
   

   ad-hoc

   ansible localhost -m setup
   
   ansible localhost -m apt -a "name=git-core state=present update_cache=yes" -b -K -e ansible_python_interpreter=/user/bin/python3
   

8. What's an Ansible role?

   Roles are a required file naming and directory convention for grouping tasks and variables

9. Why use roles?

   Roles make groups of Ansible tasks reusable, both for different environments and for usage between projects.

10. What are playbooks?

    Playbooks are the top-level collection that contain one or more roles, many tasks, variable and all other information necessary for execution

    mkdir roles
    cd roles
    mkdir common
    cd common
    mkdir tasks
    cd tasks
    
    ansible-playbook -i ./hosts --private-key=./first_playbook playbook.yml
    
    ssh -i ./first_playbook deployer@174.138.43.168