rds-scale.sh

#!/bin/bash

usage()
{
    echo "Description: this script is used for scaling databases of r3 size only. can be altered make sure to have the rds cli installed";
    echo "-e    (Required Field) Specify the environment you want to scale Ex: perf | performance, stag | staging, sand | sandbox, or prod | production ";
    echo "-i    Shows information for the environment";
    echo "-s    Scale to specified instance default = large. Ex: l | large, xl | xlarge, 2xl | 2xlarge, 4xl | 4xlarge, or 8xl | 8xlarge";
    echo "";
    echo "E.g. usage:";
    echo "";
    echo "rds-scale.sh -e production -s xl";
    echo "This would scale the master production server up to db.r3.xlarge";
    echo "";
    echo "rds-scale.sh -e performance -s l";
    echo "This would scale the master performance server to db.r3.large";
    echo "";
    echo "rds-scale.sh -e production -i";
    echo "This would show the status information for the server.";
    echo "";

    exit
}

if [[ $# -eq 0 ]] ; then
    echo "Please pass at least one argument.";
    usage
fi
env=''
server_identifier=''
info=0
scalesize=''

#server list
prod_server='prod_db_name'
perf_server='perf_db_name'
stag_server='stag_db_name'
sand_server='sand_db_name'

while [ "$1" != "" ]; do
    case $1 in
        -e | --environment )   shift
                               env=$1
                               ;;
        -i | --information )   info=1
                               ;;
        -s | --scale )         shift
                               scale=$1
                               ;;
        -h | --help )          usage
                               exit
                               ;;
        * )                    usage
                               exit 1
    esac
    shift
done

case "$env" in
    'prod' | 'production' )  server_identifier="$prod_server" ;;
    'perf' | 'performance')  server_identifier="$perf_server" ;;
    'stag' | 'staging'    )  server_identifier="$stag_server" ;;
    'sand' | 'sandbox'    )  server_identifier="$sand_server" ;;
    *                     )  echo "not a valid environment please choose one"; exit ;;
esac

if [[ $info == 1 ]] ; then
    rds-describe-db-instances "$server_identifier"
    echo ""
fi

case "$scale" in
    'l'  | 'large'   ) scalesize='db.r3.large'   ;;
    'xl' | 'xlarge'  ) scalesize='db.r3.xlarge'  ;;
    '2xl'| '2xlarge' ) scalesize='db.r3.2xlarge' ;;
    '4xl'| '4xlarge' ) scalesize='db.r3.4xlarge' ;;
    '8xl'| '8xlarge' ) scalesize='db.r3.8xlarge' ;;
    *                ) echo "no size selected please choose one"; exit ;;
esac

rds-modify-db-instance --apply-immediately --db-instance-class "$scalesize" --db-instance-identifier "$server_identifier";