Variable documentation (#606)

* docs: first modules' variable docs table

* docs: variables for k3s_server_post

* docs: lxc and prereq vars in README

* style: lint errors

* docs: argument_specs for proxmox_lxc

* docs: last variables found added to the README

roles/k3s_agent/meta/main.yml

@@ -19,14 +19,19 @@ argument_specs:
 
       proxy_env:
         type: dict
-        description: Internet proxy configurations
+        description:
+          - Internet proxy configurations.
+          - See https://docs.k3s.io/advanced#configuring-an-http-proxy for details
         default: ~
         options:
           HTTP_PROXY:
+            description: HTTP internet proxy
             required: true
           HTTPS_PROXY:
+            description: HTTPS internet proxy
             required: true
           NO_PROXY:
+            description: Addresses that will not use the proxies
             required: true
 
       systemd_dir:

roles/k3s_server/meta/main.yml

@@ -103,17 +103,23 @@ argument_specs:
           - frr
           - native
         default: native
+        description: Use FRR mode or native. Valid values are `frr` and `native`
 
       proxy_env:
         type: dict
-        description: Internet proxy configurations
+        description:
+          - Internet proxy configurations.
+          - See https://docs.k3s.io/advanced#configuring-an-http-proxy for details
         default: ~
         options:
           HTTP_PROXY:
+            description: HTTP internet proxy
             required: true
           HTTPS_PROXY:
+            description: HTTPS internet proxy
             required: true
           NO_PROXY:
+            description: Addresses that will not use the proxies
             required: true
 
       retry_count:

roles/lxc/meta/main.yml

@@ -5,3 +5,4 @@ argument_specs:
     options:
       custom_reboot_command:
         default: ~
+        description: Command to run on reboot

roles/proxmox_lxc/meta/main.yml

@@ -0,0 +1,9 @@
+---
+argument_specs:
+  main:
+    short_description: Proxmox LXC settings
+    options:
+      proxmox_lxc_ct_ids:
+        description: Proxmox container ID list
+        type: list
+        required: true

roles/raspberrypi/meta/main.yml

@@ -0,0 +1,10 @@
+---
+argument_specs:
+  main:
+    short_description: Adjust some Raspberry Pi specific requisites
+    options:
+      state:
+        default: present
+        description:
+          - Indicates whether the k3s prerequisites for Raspberry Pi should be
+          - set up (possible values are `present` and `absent`)

roles/reset_proxmox_lxc/meta/main.yml

@@ -0,0 +1,9 @@
+---
+argument_specs:
+  main:
+    short_description: Proxmox LXC settings
+    options:
+      proxmox_lxc_ct_ids:
+        description: Proxmox container ID list
+        type: list
+        required: true