Write and deploy motd-carp-state.sh

A script that checks the carp state and writes in the /etc/motd file if the
server is in backup or master state. Script is copied in /usr/share/scripts/
directory and a cron job is installed but disabled by default.

roles/post-install/files/motd-carp-state.sh

@@ -0,0 +1,47 @@
+#!/bin/sh
+
+if [ ! -f /etc/motd-original ]; then
+    cp /etc/motd /etc/motd-original
+fi
+
+if [ ! -f /tmp/carp.state ]; then
+    echo "unknown" > /tmp/carp.state
+fi
+
+ifconfig carp0 | grep -q master
+master=$?
+ifconfig carp0 | grep -q backup
+backup=$?
+
+if [ "$master" -eq 0 ]; then
+    if [ $(cat /tmp/carp.state) = "master" ]; then
+        # We already were master, no change
+        exit 0
+    fi
+cat /etc/motd-original - << EOF > /etc/motd
+    __  ______   _____________________
+   /  |/  /   | / ___/_  __/ ____/ __ \ 
+  / /|_/ / /| | \__ \ / / / __/ / /_/ /
+ / /  / / ___ |___/ // / / /___/ _, _/
+/_/  /_/_/  |_/____//_/ /_____/_/ |_|
+
+EOF
+echo "master" > /tmp/carp.state
+elif [ "$backup" -eq 0 ]; then
+    if [ $(cat /tmp/carp.state) = "backup" ]; then
+        # We already were backup, no change
+        exit 0
+    fi
+cat /etc/motd-original - << EOF > /etc/motd
+    ____  ___   ________ ____  ______ 
+   / __ )/   | / ____/ //_/ / / / __ \ 
+  / __  / /| |/ /   / ,< / / / / /_/ /
+ / /_/ / ___ / /___/ /| / /_/ / ____/ 
+/_____/_/  |_\____/_/ |_\____/_/      
+
+EOF
+echo "backup" > /tmp/carp.state
+else
+    # No CARP
+    exit 0
+fi

roles/post-install/tasks/main.yml

@@ -2,3 +2,4 @@
 # tasks files
 - include: ldif.yml
 - include: update.yml
+- include: motd.yml

roles/post-install/tasks/motd.yml

@@ -0,0 +1,14 @@
+---
+- name: Deploy dynamic motd script for CARP master or backup
+  copy:
+    src: motd-carp-state.sh
+    dest: /usr/share/scripts/motd-carp-state.sh
+    owner: root
+    group: wheel
+    mode: '0755'
+
+- name: Cron job for dynamic motd script is installed
+  cron:
+    name: dynamic motd for CARP
+    job: "/bin/sh /usr/share/scripts/motd-carp-state.sh"
+    disabled: true