add disable ipv6

defaults/main.yml

@@ -117,3 +117,5 @@ hosts_entries: []
 
 # Custom host file snippets to be added
 hosts_file_snippets: []
+
+system_ipV6_disable: true

handlers/main.yml

@@ -12,3 +12,6 @@
 - name: Restart sshd
   service: name=sshd state=restarted
   become: yes
+
+- name: restart_sysctl
+  service: name=systemd-sysctl state=restarted

tasks/main.yml

@@ -1,6 +1,6 @@
----
 #- include_tasks: hostname.yml
 - include_tasks: hosts.yml
+- include_tasks: tasks.sysctl.yml
 - include_tasks: dhcpcd.yml
 - include_tasks: hostname.yml
 - include_tasks: locales.yml

tasks/tasks.sysctl.yml

@@ -0,0 +1,10 @@
+---
+- name: disable IPV6
+  template:
+    src: 40-ipv6.j2
+    dest: /etc/sysctl.d/40-ipv6.conf
+    owner: root
+    group: root
+    mode: 0644
+  notify: restart_sysctl
+  become: True

templates/40-ipv6.j2

@@ -0,0 +1 @@
+net.ipv6.conf.all.disable_ipv6 = {% if system_ipV6_disable %} 1 {% else %} 0 {% endif %}