Add support for systemd overrides

README.md

@@ -104,6 +104,11 @@ This will create a file called `dns-script.lua` into the `pdns_rec_config_dir`
 and add the configuration to load this script to the `recursor.conf`
 configuration file.
 
+    pdns_rec_service_overrides: {}
+
+Dict with overrides for the service (systemd only).
+This can be used to change any systemd settings in the `[Service]` category
+
 Example Playbook
 ----------------
 

defaults/main.yml

@@ -82,3 +82,10 @@ pdns_rec_config: { }
 # This will create a file called `dns-script.lua` into the `pdns_rec_config_dir`
 # and add the configuration to load this script to the `recursor.conf`
 # pdns_rec_lua_dns_script_content: ""
+
+# Dict with overrides for the service (systemd only)
+# Can be used to increase e.g. the number of FDs like this:
+# pdns_rec_service_overrides:
+#   LimitNOFILE: 10000
+
+pdns_rec_service_overrides: {}

handlers/main.yml

@@ -4,3 +4,7 @@
   service:
     name: "{{ pdns_rec_service_name }}"
     state: restarted
+
+- name: Reload systemd and restart PowerDNS Recursor
+  command: systemctl daemon-reload
+  notify: Restart PowerDNS Recursor

tasks/main.yml

@@ -26,7 +26,12 @@
   include: configure.yml
   tags:
     - config
-
+
+- include: systemd.yml
+  when: ansible_service_mgr == 'systemd'
+  tags:
+    - service
+
 - name: Start and enable the PowerDNS Recursor service
   service:
     name: "{{ pdns_rec_service_name }}"

tasks/systemd.yml

@@ -0,0 +1,16 @@
+---
+- block:
+    - name: Ensure the override directory exists
+      file:
+        path: '/etc/systemd/system/{{ pdns_rec_service_name }}.service.d'
+        state: directory
+        owner: root
+        group: root
+    - name: Create override for the service
+      template:
+        dest: '/etc/systemd/system/{{ pdns_rec_service_name }}.service.d/override.conf'
+        src: 'override.systemd.conf.j2'
+        owner: root
+        group: root
+      notify: Reload systemd and restart PowerDNS Recursor
+  when: pdns_rec_service_overrides != {}

templates/override.systemd.conf.j2

@@ -0,0 +1,4 @@
+[Service]
+{% for k, v in pdns_rec_service_overrides.items() %}
+{{ k }}={{ v }}
+{% endfor %}