From 4596743a5637ba548e5308a14bed31b450c339f7 Mon Sep 17 00:00:00 2001
From: Tobias Hachmer <tobias@hachmer.de>
Date: Mon, 2 Oct 2017 11:11:43 +0200
Subject: [PATCH] Add readme for role prerequisites

---
 roles/prerequisites/README.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 roles/prerequisites/README.md

diff --git a/roles/prerequisites/README.md b/roles/prerequisites/README.md
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+# Ansible role prerequisites
+
+Diese Ansible role prüft ob die Voraussetzungen für ein Freifunk Gateway erfüllt sind.
+
+- Forward-DNS Eintrag == ausgelesener IPv4-Adresse
+- Forward-DNS Eintrag == ausgelesener IPv6-Adresse
+- Linux Distribution == Debian
+- Debian Version == 9
+
+## Benötigte Variablen
+
+- Variable `dns_host_ipv4_address` (Rollen-Variable)
+```
+dns_host_ipv4_address: "{{ lookup('dig', inventory_hostname, 'qtype=A') }}"
+```
+- Variable `dns_host_ipv6_address` (Rollen-Variable)
+```
+dns_host_ipv6_address: "{{ lookup('dig', inventory_hostname, 'qtype=AAAA') }}"
+```