CloudWatch custom metric put.

put_mon.bash

#!/bin/bash
#--------------------------------------
#
# Author(s):
#
#   K.Kadoyama
#
# Usage:
#
#   mon_put.bash
#
# Revision:
#
#   1.0 by K.Kadoyama
#   ---------------
#       Create new.
#
#--------------------------------------

#------------------
# define
#------------------
#export AWS_CLOUDWATCH_HOME=/home/ec2-user/CloudWatch-1.0.12.1
#export AWS_CREDENTIAL_FILE=$AWS_CLOUDWATCH_HOME/credentials
#export AWS_CLOUDWATCH_URL=https://monitoring.amazonaws.com
#export PATH=$AWS_CLOUDWATCH_HOME/bin:$PATH
#export JAVA_HOME=/usr/lib/jvm/jre

export SH_ORIG="${0##*/}"
export CMD_MON_PUT="mon-put-data"
export LOG_FAC="local0"

# global conf
#[ -e "/etc/profile.d/aws_define.sh" ] && source /etc/profile.d/aws_define.sh
source /etc/profile.d/aws_define.sh

# get ec2 instance id
instanceid="`curl -s http://169.254.169.254/latest/meta-data/instance-id`"



#------------------
# function
#------------------
func_log() {
    if [ $# -lt 2 ]; then
        logger -p ${LOG_FAC}.warning "### WARN[${SH_ORIG}]: argument error."
        return 1
    fi
    case "$1" in
        info)
            logger -p ${LOG_FAC}.info "### INFO[${SH_ORIG}]: $2"
            ;;
        warn | warning)
            logger -p ${LOG_FAC}.warning "### WARN[${SH_ORIG}]: $2"
            ;;
        err | error)
            logger -p ${LOG_FAC}.error "### ERROR[${SH_ORIG}]: $2"
            ;;
        *)
            logger -p ${LOG_FAC}.error "### WAN[${SH_ORIG}]: Log facility is not defined. Original message is [$2]"
    esac
    return 0
}

func_chk_cmd() {
    which "$1" > /dev/null 2>&1
    ret=$?
    if [ ${ret} -ne 0 ]; then
        func_log "error" "$1 not found."
        return 1
    fi
    return 0
}

func_mem_put() {
    memtotal="`free -m | awk '/Mem:/ {print $2}'`"
    memfree="`free -m | awk '/buffers\/cache/ {print $4}'`"
    memused=`echo "scale=3; 100-${memfree}*100/${memtotal}" | bc`
    [ "x" == "x${memused%%.*}" ] && memused="0${memused}

    ${CMD_MON_PUT} -m "MEMUtilization" -n "System/Linux" -d "InstanceId=${instanceid} -v ${memused} -u "Percent"
    ret=$?
    [ ${ret} -ne 0 ] && func_log "warn" "memory put error."
}


#------------------
# check
#------------------
func_chk_cmd "${CMD_MON_PUT}"
[ $? -ne 0 ] && exit $?
func_chk_cmd "bc"
[ $? -ne 0 ] && exit $?



#------------------
# main
#------------------
func_mem_put

exit 0