An init.d script that automatically configures rsyslog logging to Loggly

Loggly rsyslog on EC2 boot

#!/bin/sh
#
# This script automatically configures rsyslog for Loggly. This script requires that the
# your Customer Token is passed in via EC2 user-data, on its own line, as follows:
#
# LOGGLY_AUTH=<your auth token>
#
# For example, if your Customer Token is 727bae3d-750c-4e44-96ed-ad83230208bb, then pass
#
# LOGGLY_AUTH=727bae3d-750c-4e44-96ed-ad83230208bb
#
# as user-data
#
# If you do not have a Loggly account, sign up for one at www.loggly.com.

RSYSLOG_CONF_DIR=/etc/rsyslog.d
LOGGLY_CONFIG=$RSYSLOG_CONF_DIR/22-loggly.conf

if [ ! -d $RSYSLOG_CONF_DIR ]; then
  logger "rsyslog conf directory does not exist -- no logging to Loggly will be configured."
  exit 1
fi

userdata=`curl -m 10 -s http://169.254.169.254/latest/user-data | grep LOGGLY`
if [ $? -ne 0 ]; then
  logger "Unable to read Loggly Customer authentication token -- no logging to Loggly will be configured."
  exit 1
fi
auth=`echo "$userdata" | sed 's/LOGGLY_AUTH=\(+*\)/\1/'`

if [ -z "$auth" ]; then
  logger "Empty Loggly Customer authentication token -- no logging to Loggly will be configured."
  exit 1
fi

cat >$LOGGLY_CONFIG <<EOF
#          -------------------------------------------------------
#          Syslog Logging Directives for Loggly
#          -------------------------------------------------------

# Define the template used for sending logs to Loggly. Do not change this format.
\$template LogglyFormat,"<%pri%>%protocol-version% %timestamp:::date-rfc3339% %HOSTNAME% %app-name% %procid% %msgid% [$auth@41058] %msg%"

# Send messages to Loggly over TCP using the template.
*.*             @@logs-01.loggly.com:514;LogglyFormat

#          -------------------------------------------------------
#          End of Syslog Logging Directives for Loggly
#          -------------------------------------------------------
EOF

# Newer versions of rsyslog require a full restart before picking up
# config file changes.
/etc/init.d/rsyslog restart