In the second situation, several tools can be used to perform an in-depth test (jmeter, for example). But if you want to make an easy test based in a URL, testELB.sh could be what you need.
tesELB.sh will test an URL during a period (by default, ten minutes), making random queries through all associated IPs in your ELB. Additionally, will show you interesting information about:
- Average response time
- Maximum response time
- Percentile 95 response time
- Average payload size
- Error request (including percent)
Here is an execution example:
testELB.sh output
Usage:
This shell script could be a good starting point to troubleshoot ELB issues. Fell free to use it!
testELB.sh ELB [LOOP] [URL] [PORT] [PROTOCOL]
ELB: DNS Name associated to ELB
LOOP: Number of loops. Default value: 600 (ten minutes)
URL: URL to check in ELB. Default value: /
PORT: Port in ELB to check. Default value: 80
PROTOCOL: Protocol to use. Default value: http
This shell script could be a good starting point to troubleshoot ELB issues. Fell free to use it!
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/bin/bash | |
| # | |
| # | |
| # Developed by: Javier Sianes - jsianes@gmail.com | |
| # | |
| # Shell script to test ELB request activity health | |
| # | |
| # | |
| function on_exit() | |
| { | |
| if [ -f ${TMP} ]; then rm -f ${TMP}; fi | |
| if [ -f ${TMP_ELB} ]; then rm -f ${TMP_ELB}; fi | |
| if [ -f ${TMP_CUR} ]; then rm -f ${TMP_CUR}; fi | |
| if [ -f ${TMP_OUT} ]; then rm -f ${TMP_OUT}; fi | |
| if [ -f ${TMP_PER} ]; then rm -f ${TMP_PER}; fi | |
| } | |
| function usage() | |
| { | |
| echo "Error, incorrect parameters." | |
| echo "" | |
| echo "Usage: $0 ELB [LOOP] [URL] [PORT] [PROTOCOL]" | |
| echo "" | |
| echo " ELB: DNS Name associated to ELB" | |
| echo " LOOP: Number of loops. Default value: 600 (ten minutes)" | |
| echo " URL: URL to check in ELB. Default value: /" | |
| echo " PORT: Port in ELB to check. Default value: 80" | |
| echo " PROTOCOL: Protocol to use. Default value: http" | |
| echo "" | |
| exit 1 | |
| } | |
| function percentile() | |
| { | |
| PERCT="0.95" | |
| P_VALUE=`echo "scale=2; ((${PERCT}*${TOTAL})/1)" | bc` | |
| BOOL=`echo ${P_VALUE} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then P_VALUE=0${P_VALUE}; fi | |
| ACC=0 | |
| echo "" >${TMP_PER} | |
| cat ${TMP} | grep -v FAIL | cut -d : -f 5 | sort -n | | |
| while read VAR | |
| do | |
| ACC=`echo "scale=2; (${ACC}+${VAR})" | bc` | |
| BOOL=`echo "${ACC}>${P_VALUE}" | bc` | |
| if [ ${BOOL} -eq 1 ];then echo ${VAR} >${TMP_PER}; break; fi | |
| done | |
| PERCENT=`cat ${TMP_PER}` | |
| if [ "${PERCENT}" = "" ] | |
| then | |
| PERCENT=`cat ${TMP} | grep -v FAIL | cut -d : -f 5 | sort -n | tail -1` | |
| fi | |
| if [ "${PERCENT}" = "" ];then PERCENT=0; fi | |
| } | |
| function payload() | |
| { | |
| ACC=0 | |
| while read VAR | |
| do | |
| PAY=`echo ${VAR} | cut -d : -f 4` | |
| ACC=`echo "scale=2; (${ACC}+${PAY})/1" | bc` | |
| done <${TMP} | |
| NUMP=`cat ${TMP} | wc -l` | |
| if [ ${NUMP} -eq 0 ] | |
| then | |
| PAYLOAD=0 | |
| else | |
| PAYLOAD=`echo "scale=2; (${ACC}/${NUMP})/1" | bc` | |
| fi | |
| } | |
| TIMEOUT="60" | |
| TMP="/tmp/${RANDOM}${RANDOM}${RANDOM}${RANDOM}.TMP" | |
| TMP_ELB="/tmp/${RANDOM}${RANDOM}${RANDOM}${RANDOM}.TMP" | |
| TMP_CUR="/tmp/${RANDOM}${RANDOM}${RANDOM}${RANDOM}.TMP" | |
| TMP_OUT="/tmp/${RANDOM}${RANDOM}${RANDOM}${RANDOM}.TMP" | |
| TMP_PER="/tmp/${RANDOM}${RANDOM}${RANDOM}${RANDOM}.TMP" | |
| trap on_exit EXIT | |
| case $# in | |
| 1) | |
| ELB=$1 | |
| LOOP=600 | |
| URL="/" | |
| PORT=80 | |
| PROTOCOL="http" ;; | |
| 2) | |
| ELB=$1 | |
| LOOP=$2 | |
| URL="/" | |
| PORT=80 | |
| PROTOCOL="http" ;; | |
| 3) | |
| ELB=$1 | |
| LOOP=$2 | |
| URL=$3 | |
| PORT=80 | |
| PROTOCOL="http" ;; | |
| 4) | |
| ELB=$1 | |
| LOOP=$2 | |
| URL=$3 | |
| PORT=$4 | |
| PROTOCOL="http" ;; | |
| 5) | |
| ELB=$1 | |
| LOOP=$2 | |
| URL=$3 | |
| PORT=$4 | |
| PROTOCOL=$5 ;; | |
| *) | |
| usage ;; | |
| esac | |
| dig a +short ${ELB} >${TMP_ELB} 2>/dev/null | |
| NUM=0 | |
| ERROR=0 | |
| MAX=0 | |
| TOTAL=0 | |
| NUM_ELB=`cat ${TMP_ELB} | wc -l` | |
| if [ ${NUM_ELB} -gt 0 ] | |
| then | |
| echo "" | |
| echo "------------------------------------------------------------------------------" | |
| echo "REQUEST TEST" | |
| echo "------------------------------------------------------------------------------" | |
| while [ ${NUM} -lt ${LOOP} ] | |
| do | |
| VALUE=`echo "(${RANDOM}%${NUM_ELB})+1" | bc` | |
| ELB_IP=`sed "${VALUE}q;d" ${TMP_ELB}` | |
| curl -s -k -I --connect-timeout ${TIMEOUT} -o ${TMP} -w "%{remote_ip}:%{remote_port}:%{size_request}:%{time_total}\n" "${PROTOCOL}://${ELB_IP}:${PORT}${URL}" >${TMP_CUR} 2>/dev/null | |
| if [ $? -ne 0 ] | |
| then | |
| (( ERROR = ${ERROR}+1 )) | |
| echo "FAIL:${ELB_IP}:${PORT}:0:0" | tee -a ${TMP_OUT} | |
| else | |
| HTTP_CODE=`cat ${TMP} | grep -i "200 ok" | wc -l` | |
| if [ ${HTTP_CODE} -eq 0 ] | |
| then | |
| (( ERROR = ${ERROR}+1 )) | |
| echo "FAIL:$(cat ${TMP_CUR} | sed 's/,/./g')" | tee -a ${TMP_OUT} | |
| else | |
| echo "OK:$(cat ${TMP_CUR} | sed 's/,/./g')" | tee -a ${TMP_OUT} | |
| fi | |
| REQUEST_TIME=`cat ${TMP_CUR} | cut -d : -f 4 | sed 's/,/./g'` | |
| BOOL=`echo "${REQUEST_TIME}>${MAX}" | bc` | |
| if [ ${BOOL} -eq 1 ]; then MAX=${REQUEST_TIME}; fi | |
| TOTAL=`echo "(${TOTAL}+${REQUEST_TIME})" | bc` | |
| fi | |
| sleep 1 | |
| (( NUM = ${NUM}+1 )) | |
| done | |
| P_ERROR=`echo "scale=2; (((${ERROR}/${LOOP})*100)/1)" | bc` | |
| BOOL=`echo ${P_ERROR} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then P_ERROR=0${P_ERROR}; fi | |
| TOTAL_MINUTES=`echo "scale=2; ((${TOTAL}/60)/1)" | bc` | |
| BOOL=`echo ${TOTAL_MINUTES} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then TOTAL_MINUTES=0${TOTAL_MINUTES}; fi | |
| BOOL=`echo ${MAX} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then MAX=0${MAX}; fi | |
| AVERAGE=`echo "scale=2; ((${TOTAL}/${LOOP})/1)" | bc` | |
| BOOL=`echo ${AVERAGE} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then AVERAGE=0${AVERAGE}; fi | |
| cat ${TMP_OUT} >${TMP} | |
| percentile | |
| payload | |
| echo "" | |
| echo "------------------------------------------------------------------------------" | |
| echo "ELB \"${ELB}\": FINAL RESULTS" | |
| echo "------------------------------------------------------------------------------" | |
| echo "" | |
| echo "Total requests: ${LOOP}" | |
| echo "Total requests time: ${TOTAL} seconds (${TOTAL_MINUTES} minutes)" | |
| echo "Maximum request time: ${MAX} seconds" | |
| echo "Average request time: ${AVERAGE} seconds" | |
| echo "Percentile (${PERCT}): ${PERCENT} seconds" | |
| echo "Average payload size: ${PAYLOAD} bytes" | |
| echo "Error rate: ${ERROR} of ${LOOP} (${P_ERROR}%)" | |
| echo "IPs in ELB: ${NUM_ELB}" | |
| NUM=1 | |
| while [ ${NUM} -le ${NUM_ELB} ] | |
| do | |
| ELB_IP=`sed "${NUM}q;d" ${TMP_ELB}` | |
| cat ${TMP_OUT} | grep ${ELB_IP} >${TMP} | |
| NUM_REQUEST=`cat ${TMP} | wc -l` | |
| if [ ${NUM_REQUEST} -gt 0 ] | |
| then | |
| P_NREQUEST=`echo "scale=2; (((${NUM_REQUEST}/${LOOP})*100)/1)" | bc` | |
| BOOL=`echo ${P_NREQUEST} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then P_NREQUEST=0${P_NREQUEST}; fi | |
| ERROR_REQUEST=`cat ${TMP} | grep FAIL | wc -l` | |
| P_ERROR_REQUEST=`echo "scale=2; (((${ERROR_REQUEST}/${NUM_REQUEST})*100)/1)" | bc` | |
| BOOL=`echo ${P_ERROR_REQUEST} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then P_ERROR_REQUEST=0${P_ERROR_REQUEST}; fi | |
| P_TOTAL_ERROR_REQUEST=`echo "scale=2; (((${ERROR_REQUEST}/${LOOP})*100)/1)" | bc` | |
| BOOL=`echo ${P_TOTAL_ERROR_REQUEST} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then P_TOTAL_ERROR_REQUEST=0${P_TOTAL_ERROR_REQUEST}; fi | |
| MAX=0 | |
| TOTAL=0 | |
| while read LINE | |
| do | |
| REQUEST_TIME=`echo ${LINE} | cut -d : -f 5` | |
| BOOL=`echo "${REQUEST_TIME}>${MAX}" | bc` | |
| if [ ${BOOL} -eq 1 ]; then MAX=${REQUEST_TIME}; fi | |
| TOTAL=`echo "(${TOTAL}+${REQUEST_TIME})" | bc` | |
| AVERAGE=`echo "scale=2; ((${TOTAL}/${NUM_REQUEST})/1)" | bc` | |
| BOOL=`echo ${AVERAGE} | grep ^[.] | wc -l` | |
| if [ ${BOOL} -eq 1 ];then AVERAGE=0${AVERAGE}; fi | |
| done < ${TMP} | |
| percentile | |
| payload | |
| else | |
| P_NREQUEST=0 | |
| MAX=0 | |
| AVERAGE=0 | |
| PERCENT=0 | |
| ERROR_REQUEST=0 | |
| P_ERROR_REQUEST=0 | |
| P_TOTAL_ERROR_REQUEST=0 | |
| PAYLOAD=0 | |
| fi | |
| echo " IP: ${ELB_IP}" | |
| echo " Processed requests: ${NUM_REQUEST} of ${LOOP} (${P_NREQUEST}%)" | |
| echo " Maximum request time: ${MAX} seconds" | |
| echo " Average request time: ${AVERAGE} seconds" | |
| echo " Percentile (${PERCT}): ${PERCENT} seconds" | |
| echo " Average payload size: ${PAYLOAD} bytes" | |
| echo " Error request: ${ERROR_REQUEST} of ${NUM_REQUEST} (${P_ERROR_REQUEST}% / ${P_TOTAL_ERROR_REQUEST}%)" | |
| echo "" | |
| (( NUM = ${NUM}+1 )) | |
| done | |
| fi |
