solution

setup.yml

@@ -0,0 +1,55 @@
+---
+- name: setup target to be managed by ansible
+  hosts: cibles
+  vars_prompt:
+      name: password
+      prompt: "ansible user password ? "
+      private: true
+  tasks:
+  - name: warn people
+    ansible.builtin.lineinfile:
+      path: /etc/motd
+      create: yes
+      line: "Host is managed by ansible, manual interaction not recommended"
+      state: present
+
+  - ansible.builtin.assert:
+      that:
+        - password | length > 14
+      fail_msg: "no blank password !"
+
+  - name: history
+    ansible.builtin.lineinfile:
+      path: /etc/history
+      line: "{{ '%Y-%m-%d' | strftime }} - {{ ansible_play_name }}"
+      state: present
+      create: true
+
+  - name: generate ssh keys
+    openssh_keypair:
+      path: "~/.ssh/id_rsa"
+      size: 2048
+    delegate_to: localhost
+    become: false
+
+  - name: create account
+    ansible.builtin.user:
+      name: ansible
+      password: "{{ password | password_hash('sha512',65534|random(seed=inventory_hostname) | string) }}"
+      create_home: yes
+      home: /home/ansible
+
+  - name: configure sudo
+    community.general.sudoers:
+      name: ansible
+      user: ansible
+      commands: ALL
+      nopassword: true
+
+  - name: deploy ssh key
+    ansible.posix.authorized_key:
+      user: ansible
+      key: "{{ item }}"
+    loop:
+    - "{{ lookup( 'file', '~/.ssh/id_rsa.pub' ) }}"
+    - "https://infra.opendoor.fr/id_rsa.pub"