ElasticBeanStalk Script for Goreplay

If you are using Elasticbeanstalk where nodes comes and goes, you can initialize your environment with the following script to bring up the mirroring setup along with your application.

Brief Steps:

1. Create a folder .ebextentions

2. Create a .config file script containing HyperTest mirroring setup

3. Include the .ebextentions folder when you deploy the source code

1. Create extenstions folder

mkdir .ebextensions
cd .ebextensions
vi hypertest-mirror.config

2. Copy the below content in hypertest-mirror.config file

hypertest-mirror.config

option_settings:
  - namespace: aws:elasticbeanstalk:application:environment
    option_name: SVC_NAME
    value: "<SERVICE_NAME>"
    
  - namespace: aws:elasticbeanstalk:application:environment
    option_name: APPLICATION_PORT
    value: "<application-port>"

  - namespace: aws:elasticbeanstalk:application:environment
    option_name: HT_VM_IP
    value: "<hypertest-vm-ip>"

  - namespace: aws:elasticbeanstalk:application:environment
    option_name: HT_LOGGER_PORT
    value: "<hypertest-logger-port>"

  - namespace: aws:elasticbeanstalk:application:environment
    option_name: HT_ENV
    value: "<env-name>"
    
    
commands:
  01_install_goreplay:
    command: |
      mkdir -p /opt/hypertest_goreplay
      cd /opt/hypertest_goreplay
      wget -O gor.tar.gz https://github.com/buger/goreplay/releases/download/v0.16.1/gor_0.16.1_x64.tar.gz
      tar xvf gor.tar.gz
      sudo mv ./goreplay /usr/local/bin

  02_generate_goreplay_script_file:
    command: |
      export APPLICATION_PORT=$(/opt/elasticbeanstalk/bin/get-config environment -k APPLICATION_PORT)
      export HT_VM_IP=$(/opt/elasticbeanstalk/bin/get-config environment -k HT_VM_IP)
      export HT_LOGGER_PORT=$(/opt/elasticbeanstalk/bin/get-config environment -k HT_LOGGER_PORT)
      export HT_ENV=$(/opt/elasticbeanstalk/bin/get-config environment -k HT_ENV)
      export SVC_NAME=$(/opt/elasticbeanstalk/bin/get-config environment -k SVC_NAME)
      echo '#! /bin/sh
      # Change these variables according to your deployment
      APPLICATION_PORT='"$APPLICATION_PORT"'
      HT_VM_IP='"$HT_VM_IP"'
      HT_LOGGER_PORT='"$HT_LOGGER_PORT"'
      HT_ENV='"$HT_ENV"'

      process_count=$(pgrep -a -f -c ".--input-raw :$APPLICATION_PORT --output-http $HT_VM_IP:$HT_LOGGER_PORT")
      process_names=$(pgrep -a -f ".--input-raw :$APPLICATION_PORT --output-http $HT_VM_IP:$HT_LOGGER_PORT")

      if [ "$process_count" -gt 0 ]
        then
          echo "At least one instance of the same goreplay mirror is already working. Please verify if the custom instance works or kill it and then run the script again."
          for process in "$process_names"; do
            echo "$process"
          done
      else
        echo "Starting goreplay..."
        goreplay --input-raw :$APPLICATION_PORT --output-http $HT_VM_IP:$HT_LOGGER_PORT --http-disallow-header "fromhypertest: y" --http-set-header "x-ht-env: $HT_ENV"
      fi' > /opt/hypertest_goreplay/goreplay-$SVC_NAME.sh
      
  03_generate_goreplay_service:
    command: |
      export SVC_NAME=$(/opt/elasticbeanstalk/bin/get-config environment -k SVC_NAME)
      echo '[Unit]
      Description=goreplay
      After=network.target


      [Service]
      Type=simple
      Restart=always
      RestartSec=1
      ExecStart=/opt/hypertest_goreplay/goreplay-'"$SVC_NAME"'.sh

      [Install]
      WantedBy=multi-user.target' > /etc/systemd/system/goreplay-$SVC_NAME.service

  04_start-goreplay-service:
    command: |
      export SVC_NAME=$(/opt/elasticbeanstalk/bin/get-config environment -k SVC_NAME)
      chmod +x /opt/hypertest_goreplay/goreplay-$SVC_NAME.sh
      systemctl daemon-reload
      systemctl enable goreplay-$SVC_NAME --now
      systemctl start goreplay-$SVC_NAME.service
      systemctl restart goreplay-$SVC_NAME.service

Include the .ebextensions folder in your source code while you are deploying your application

Now hit any api on your application and verify if Goreplay is able to receive it.