ansible

ansible all --list-hosts
 
ansible all -m ping

helloworld.yaml

- name: helloworld
  hosts: nodes
  tasks:
   - name: Ping my hosts
     ansible.builtin.ping:
   - name: Print message
     ansible.builtin.debug:
       msg: Hello world

ansible-playbook helloworld.yaml

addkeys.yaml

- name: Add ssh key to ubuntu user
  hosts: nodes
  tasks:
  - name: Set authorized key took from file
    authorized_key:
      user: ubuntu
      state: present
      key: "{{ lookup('file', '/root/.ssh/id_ed25519.pub') }}"

ansible-playbook addkeys.yaml

python3 -m pip install --user ansible

/etc/ansible/hosts

[all:vars]
ansible_user='ubuntu'
ansible_become=yes
ansible_become_method=sudo
ansible_python_interpreter='/usr/bin/env python3'
 
[nodes]
10.45.0.1
10.45.0.2
10.45.0.3
10.45.0.4
10.45.0.5