Bash script to force https in apache

apache_force_https.sh

#!/bin/bash -x

#
# Linux detection
#

if [ -e /usr/bin/lsb_release ]; then
  case `lsb_release -si` in
    Ubuntu*) export RS_DISTRO=ubuntu
             export RS_BASE_OS=debian
                         echo 'Ubuntu detected.'
             ;;
    Debian*) export RS_DISTRO=debian
             export RS_BASE_OS=debian
                         echo 'Debian detected.'
             ;;
    CentOS*) export RS_DISTRO=centos
             export RS_BASE_OS=redhat
                         echo 'CentOS detected.'
             ;;
    Fedora*) export RS_DISTRO=redhat
             export RS_BASE_OS=redhat
                         echo 'Fedora detected.'
             ;;
    *)       export RS_DISTRO=unknown
             export RS_BASE_OS=unknown
             ;;
  esac
fi
echo

#
# Test for a reboot,  if this is a reboot just skip this script.
#
if test "$RS_REBOOT" = "true" ; then
 echo "Skip Install Postfix on reboot."
 logger -t RightScale "Skip Install Postfix on reboot."
 exit 0 # Leave with a smile ...
fi

#
# Assign default inputs values if not set/empty
#
: ${APACHE_FRONTEND_PORT:=8000}

#
# Assign local/private variables specific as per distro used
#
if [[ "$RS_DIST" = 'debian' || "$RS_DIST" = 'ubuntu' ]]; then
 apache_config_dir=/etc/apache2
 apache_user="www-data"
 apache_group="www-data"
 collectd_config_include_dir=/etc/collectd/conf
else
 apache_config_dir=/etc/httpd
 apache_user="apache"
 apache_group="apache"
 collectd_config_include_dir=/etc/collectd.d
fi

# Force HTTPS on the Apache frontend vhost
sed -i 's/RewriteEngine On/RewriteEngine On\n  RewriteCond %{SERVER_PORT} !^443$\n  RewriteRule ^\/(.*) https:\/\/%{HTTP_HOST}\/$1 [NC,R,L]/' "$apache_config_dir"/sites-enabled/"$APPLICATION_NAME".frontend.http.conf

# Turn off verify host with collectd plugin
sed -i '/<\Plugin apache>/a\
VerifyHost false' "$collectd_config_include_dir"/apache.conf

# Done.