add option to overwrite systemd-resolved

defaults/main.yml

@@ -50,6 +50,7 @@ droneci_autoscaler_agent_architecture: amd64
 droneci_autoscaler_agent_distro: ubuntu
 droneci_autoscaler_agent_volumes: []
 droneci_autoscaler_agent_package_upgrade: False
+droneci_autoscaler_agent_resolved_dns: []
 
 # @var droneci_autoscaler_agent_packages:description: >
 # Install extra required packages during agents bootstrapping.

templates/services/userdata.yml.j2

@@ -74,3 +74,10 @@ write_files:
   - path: /etc/docker/server-key.pem
     encoding: b64
     content: {% raw %}{{ .TLSKey | base64 }}{% endraw %}
+  {% if droneci_autoscaler_agent_resolved_dns | length > 0 %}
+
+  - path: /etc/systemd/resolved.conf
+    content: |
+      [Resolve]
+      DNS={{ droneci_autoscaler_resolved_dns | join(" ") }}
+  {% endif %}