A Python3 tool to help you determine the correct instance types to use for your running EC2/RDS instances.
AWS EC2/RDS Instance Right-Sizer
This tool is designed and written in Python 3.6.5 to help you determine the right AWS EC2/RDS instance type for your servers based on historical usage.
uUsage: rightsizer.py [OPTIONS] rightsizer takes user input and provides an output CSV of suggestions. Options: -p, --profile TEXT Your AWS Credentials Profile. -k, --access-key TEXT Your AWS Access Key ID. -s, --secret-key TEXT Your AWS Secret Access Key ID. -r, --region TEXT The AWS Region to query. -t, --threshold INTEGER... The Cloudwatch [average, max] CPU usage threshold. -q, --query-config INTEGER... The amount of [days, period] to query Cloudwatch for. -o, --output TEXT The Name/Location of the file to output. -e, --ec2-only -d, --rds-only -v, --verbose -h, --help Print help message
A pip package is available for this tool. This is the recommended way to install and run the tool. Download and run the tool using the steps below:
python3 -m pip install awsrightsizer --user
Upgrading is easy as well with pip, simply issue the following commands:
python3 -m pip install awsrightsizer --upgrade --user
This tool is best run in a virtual environment. You may need to install a virtual environment tool such as python3-venv or python3-virutalenv via your package manager and/or install one via pip by running
pip install virtualenv --user.
git clone https://github.com/gregoryjordanm/awsrightsizer.git
python3 -m venv venvor
virtualenv -p python3 venv
pip install -r requirements
python rightsizer.py [OPTIONS]
Lets assume for a second that you have already installed the AWS CLI tools for your distribution...
Lets also assume that you have already run the
aws configure command and have a profile named "dev" on your system that you have already tested and is functioning :)
To run this tool with your working profile, simply do the following:
rightsizer -p dev
The tool will output a "report_date.csv" file in the directory you ran it in.
Lets now assume that you hate my report name, simply run:
rightsizer -p dev -o your_awesome_new_csv.csv
The tool will now use your_awesome_new_csv.csv is the output file.
If you don't have an AWS profile set up for some reason (it really does make life easier), then you can use the -k, -s. and -r flags to provide the necessary info.
rightsizer -k XXXXXXXXXXXX -s XXXXXXXXXXXXXXXXXXXXXXXX -r us-east-1
If you don't want to have the tool pull 30 days worth of data, or if you don't want the data periods to be 30 minutes, use the -q flag like so:
rightsizer -p dev -q 15,900
This will tell the tool to query 15 days at 15 minute intervals.
To run against just your EC2 assets, just issue the -e flag.
To run against just your RDS assets, just issue the -d flag.
If you are running this via the source, you will need to add
python rightsizer.py to your command instead of just
Let me know if you find bugs :)
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