Add certbot role

roles/certbot/defaults/main.yaml

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+---
+certbot_package_name: certbot
+certbot_package_state: present

roles/certbot/tasks/Ubuntu.yaml

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+---
+- name: configure ppa
+  apt_repository:
+    repo: "ppa:certbot/certbot"

roles/certbot/tasks/issue.yaml

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+---
+- name: "determine if certificate for {{ item.domains | join(', ') }}" 
+  stat:
+    path: "/etc/letsencrypt/live/{{ item.domains | first }}/cert.pem"
+  register: st
+
+- name: "request certificate for {{ item.domains | join(', ') }}"
+  command: "[[ ! -e certbot certonly --webroot -w {{ certbot_challenge_webroot_path }} --agree-tos --noninteractive --email {{ item.email }} -d {{ item.domains | join(',') }}"
+  when: not st.stat.exists

roles/certbot/tasks/main.yaml

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+---
+- name: gather os specific variables
+  include_vars: "{{ lookup('first_found', possible_files) }}"
+  vars:
+    possible_files:
+      files:
+        - "{{ ansible_distribution }}-{{ ansible_distribution_version }}.yaml"
+        - "{{ ansible_distribution }}.yaml"
+        - "{{ ansible_os_family }}.yaml"
+        - "default.yaml"
+      paths:
+        - vars
+
+- name: include os specific tasks
+  include_tasks: "{{ lookup('first_found', possible_files) }}"
+  vars:
+    possible_files:
+      files:
+        - "{{ ansible_distribution }}-{{ ansible_distribution_version }}.yaml"
+        - "{{ ansible_distribution }}.yaml"
+        - "{{ ansible_os_family }}.yaml"
+        - "default.yaml"
+      paths:
+        - tasks
+
+- name: install certbot modules
+  package:
+    name: "{{ certbot_package_name }}"
+    state: "{{ certbot_package_state }}"
+
+- name: configure challenge webroot
+  file:
+    path: "{{ certbot_challenge_webroot_path }}"
+    state: "directory"
+    owner: root
+    group: root
+    mode: 0755
+
+- name: request certificates
+  include_tasks: "issue.yaml"
+  loop: "{{ certbot_certificates }}"

roles/certbot/vars/Debian.yaml

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+---
+certbot_challenge_webroot_path: /var/www/.acme-challenge