update NAT role with keepalived service file

roles/nat_server/tasks/main.yml

@@ -68,6 +68,11 @@
   become: true
   become_user: root
 
+- name: Template keepalived service file
+  template: dest=/etc/systemd/system/keepalived.service src=keepalived.service.j2
+  become: true
+  become_user: root
+
 - name: Enable and start keepalived
   service:
     name: keepalived
@@ -75,3 +80,11 @@
     enabled: yes
   become: true
   become_user: root
+
+- name: Restart iptables service
+  service:
+    name: iptables
+    state: restarted
+  become: true
+  become_user: root
+

roles/nat_server/templates/keepalived.service.j2

+# systemd servive unit file for Keepalived 
+[Unit] 
+Description=Keepalived service for High Availability with VRRP 
+After=network.target network-online.target
+ConditionFileNotEmpty=/etc/keepalived/keepalived.conf 
+
+[Service] 
+Type=simple 
+ExecStart=/usr/sbin/keepalived --dont-fork 
+ExecReload=/bin/kill -s HUP $MAINPID #Define the procedure of killing the processes belonging to the Keepalived service unit. 
+KillMode=process 
+
+[Install] 
+WantedBy=multi-user.target