Implement support for DNS install method

tasks/create-cert-dns.yml

@@ -0,0 +1,9 @@
+---
+- name: Check if certificate already exists.
+  stat:
+    path: /etc/letsencrypt/live/{{ cert_item.domains | first | replace('*.', '') }}/cert.pem
+  register: letsencrypt_cert
+
+- name: Generate new certificate if one doesn't exist.
+  command: "{{ certbot_create_command }}"
+  when: not letsencrypt_cert.stat.exists

tasks/install-with-package.yml

@@ -1,7 +1,13 @@
 ---
-- name: Install Certbot.
+- name: Install Certbot via package.
   package: "name={{ certbot_package }} state=present"
 
+- name: Install Certbot DNS plugin via package.
+  package: "name=python3-certbot-dns-{{ certbot_dns_plugin }} state=present"
+  when:
+    - certbot_create_method == 'dns'
+    - certbot_dns_plugin is defined
+
 - name: Set Certbot script variable.
   set_fact:
     certbot_script: "{{ certbot_package }}"

tasks/install-with-snap.yml

@@ -29,6 +29,14 @@
     name: certbot
     classic: true
 
+- name: Install certbot DNS plugin via snap.
+  snap:
+    name: "certbot-dns-{{ certbot_dns_plugin }}"
+    classic: true
+  when:
+    - certbot_create_method == 'dns'
+    - certbot_dns_plugin is defined
+
 - name: Symlink certbot into place.
   file:
     src: /snap/bin/certbot

tasks/main.yml

@@ -29,5 +29,13 @@
   loop_control:
     loop_var: cert_item
 
+- include_tasks: create-cert-dns.yml
+  with_items: "{{ certbot_certs }}"
+  when:
+    - certbot_create_if_missing
+    - certbot_create_method == 'dns'
+  loop_control:
+    loop_var: cert_item
+
 - import_tasks: renew-cron.yml
   when: certbot_auto_renew