Add option for install behind http_proxy (#384)

* Add option for install behind http_proxy

* Tidy up http_proxy usage

roles/reset/tasks/main.yml

@@ -46,6 +46,15 @@
     - /var/lib/rancher/
     - /var/lib/cni/
 
+- name: Remove K3s http_proxy files
+  file:
+    name: "{{ item }}"
+    state: absent
+  with_items:
+    - "{{ systemd_dir }}/k3s.service.d"
+    - "{{ systemd_dir }}/k3s-node.service.d"
+  when: proxy_env is defined
+
 - name: Reload daemon_reload
   systemd:
     daemon_reload: yes