Merge pull request #26 from UdelaRInterior/2-systmed-resolved-configuration-to-avoid-conflicts-with-zimbra-dnscache

Disable existing DNS stub listener

README.md

@@ -54,6 +54,7 @@ Role Variables
 * **zmlogoapp:** Inform the path for your logo (Application Screen) - don't inform and no image will be applied;
 * **timezone:** inform the timezone the playbook should set in your server;
 * **zimbra_version:** Inform which version of Zimbra you want to install. Default: 8.8.15
+* **disable_existing_dns_stub_listener:** Inform "y" to disable the systemd-resolved DNS stub listener and free up port 53. Default: **n**
 
 Service Variables - Inform "y" or "n"
 --------------

defaults/main.yml

@@ -45,3 +45,4 @@ timezone: UTC
 ################################################################################
 zimbra_version: 8.8.15
 
+disable_existing_dns_stub_listener: n

tasks/configure/disable_existing_dns_stub_listener.yml

@@ -0,0 +1,28 @@
+---
+
+- name: Disable local resolver
+  ansible.builtin.ini_file:
+    path: /etc/systemd/resolved.conf
+    section: Resolve
+    option: DNSStubListener
+    value: "no"
+  register: disable_dns_stub_listener
+
+- name: Delete symbolic link
+  file:
+    path: /etc/resolv.conf
+    state: absent
+  when: disable_dns_stub_listener.changed
+
+- name: Create symbolic link
+  file:
+    path: /etc/resolv.conf
+    src: /run/systemd/resolve/resolv.conf
+    state: link
+  when: disable_dns_stub_listener.changed
+
+- name: Restart systemd-resolved service
+  ansible.builtin.service:
+    name: systemd-resolved
+    state: restarted
+  when: disable_dns_stub_listener.changed

tasks/main.yml

@@ -28,6 +28,8 @@
   when: zimbra_store == 'y'
 - import_tasks: 'configure/mta.yml'
   when: zimbra_mta == 'y'
+- import_tasks: 'configure/disable_existing_dns_stub_listener.yml'
+  when: zimbra_dnscache == 'y' and disable_existing_dns_stub_listener == 'y'
 
 #
 # Extras configuration process