From 35b0384e476ecb624a15bace26464fef1e517e76 Mon Sep 17 00:00:00 2001
From: Aaron Guise <aaron.guise@ultrafast.co.nz>
Date: Thu, 18 Aug 2016 22:51:56 +1200
Subject: [PATCH] Attempt to make the Hosts file setup non-breaking.  e.g not
 wipe out custom entries

---
 tasks/RedHat.yml | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/tasks/RedHat.yml b/tasks/RedHat.yml
index 6ced997..d9069d2 100644
--- a/tasks/RedHat.yml
+++ b/tasks/RedHat.yml
@@ -54,7 +54,7 @@
     enabled: yes
   tags: ntp
     
-- name: Ensure Hostname/DNS common config
+- name: Ensure DNS and SSH common config
   template:
     src: "{{ item.src }}"
     dest: "{{ item.dest }}"
@@ -64,10 +64,10 @@
         dest: /etc/sysconfig/network,
         mode: o+rw
       }
-    - { src: etc.hosts.j2,
-        dest: /etc/hosts,
-        mode: o=rw,g=r,a=r
-      }
+    #- { src: etc.hosts.j2,
+    #    dest: /etc/hosts,
+    #    mode: o=rw,g=r,a=r
+    #  }
     - { src: etc.resolv.conf.j2,
         dest: /etc/resolv.conf,
         mode: o=rw,g=r,a=r
@@ -80,7 +80,23 @@
     - Restart NTPD
     - Restart SSH
   tags: dns
-  
+
+- name: Ensure hosts file correct
+  lineinfile:
+    dest: /etc/hosts
+    regexp: "^127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4"
+    line: "127.0.0.1   localhost {{ ansible_hostname }}"
+  with_items:
+    - {regexp: "^127.0.0.1   localhost.+",
+       line: "127.0.0.1   localhost {{ ansible_hostname }}"
+      }
+    - {regexp: "^::1.+",
+       line: "::1         localhost {{ ansible_hostname }}"
+      }
+    - {regexp: "^{{ ansible_default_ipv4.address }}.+{{ ansible_default_ipv4.address.split('.')[-1] }}$",
+       line: "{{ ansible_default_ipv4.address }}  {{ ansible_hostname }}.{{ domain }} {{ ansible_hostname }}"
+      }   
+      
 - name: Ensure correct permissions (hosts/resolv.conf)
   file:
     path: "{{item}}"