Sidekiq dynamically adjustment through database load measuring

sidekiq_adjust.sh

#!/bin/bash

MAX=12
SKMAX=50
SKMIN=12

DIR=/home/diaspora/diaspora
SSHCONFIG="-F $DIR/../.ssh/config yggdrasil"

CONFIG=$DIR/config/diaspora.yml
DATABASE=$DIR/config/database.yml

CONFIG_MD5=$(md5sum $CONFIG)

if [[ "$(whoami)" != "diaspora" ]];
then
  echo "[C] You have to run this script as diaspora user"
  exit 1
fi

LOAD=$(ssh $SSHCONFIG uptime |sed 's/ //g' |cut -d: -f5 |cut -d. -f1)
if [ $LOAD -gt $(($MAX-1)) ];
then
  echo "[I] Invoke decreasing concurrency"
  perl -pi -e "s/^(\s+concurrency: )\d+\$/\${1}$SKMIN/g" $CONFIG
  perl -pi -e "s/^(\s+pool: )\d+\$/\${1}$SKMIN/g" $DATABASE
  if [[ "$CONFIG_MD5" == "$(md5sum $CONFIG)" ]];
  then
    echo "[I] No restart required"
    exit 0
  fi
  cd $DIR && eye restart sidekiq
else
  echo "[I] Invoke increasing concurrency"
  perl -pi -e "s/^(\s+concurrency: )\d+\$/\${1}$SKMAX/g" $CONFIG
  perl -pi -e "s/^(\s+pool: )\d+\$/\${1}$SKMAX/g" $DATABASE
  if [[ "$CONFIG_MD5" == "$(md5sum $CONFIG)" ]];
  then
    echo "[I] No restart required"
    exit 0
  fi
  cd $DIR && eye restart sidekiq
fi

exit 0