Add option for install behind http_proxy (#384)

* Add option for install behind http_proxy

* Tidy up http_proxy usage

site.yml

@@ -3,6 +3,7 @@
   hosts: proxmox
   gather_facts: true
   become: yes
+  environment: "{{ proxy_env | default({}) }}"
   roles:
     - role: proxmox_lxc
       when: proxmox_lxc_configure
@@ -10,6 +11,7 @@
 - name: Prepare k3s nodes
   hosts: k3s_cluster
   gather_facts: yes
+  environment: "{{ proxy_env | default({}) }}"
   roles:
     - role: lxc
       become: true
@@ -26,18 +28,21 @@
 
 - name: Setup k3s servers
   hosts: master
+  environment: "{{ proxy_env | default({}) }}"
   roles:
     - role: k3s_server
       become: true
 
 - name: Setup k3s agents
   hosts: node
+  environment: "{{ proxy_env | default({}) }}"
   roles:
     - role: k3s_agent
       become: true
 
 - name: Configure k3s cluster
   hosts: master
+  environment: "{{ proxy_env | default({}) }}"
   roles:
     - role: k3s_server_post
       become: true