How to update code of Python Flask App to AWS EC2 from local

After updating your code locally, you need to deploy the new version to AWS EC2.

Here is the handbook for uploading the code for the first time:

How to deploy a Python app to AWS EC2 via SSH

Uploading updated code is similar, but easier.

First, get the requirements.txt file:

pip freeze > requirements.txt 

Then, open the terminal, and update all the files except the ones you don’t want:

rsync -av --exclude='.git/' --exclude='.DS_Store' --exclude='venv_winjob' --exclude='__pycache__' --exclude='.gitattributes' --exclude='.gitignore' --exclude='.env' -e "ssh -i /Users/henrywu/MyDrive/98_Products/P01-Project-Alpha/03-keys/AWS_EC2_key_pair_helloworld.pem" /Users/henrywu/MyDrive/99_Coding/01-Github/winjob/ ec2-user@ec2-44-239-28-119.us-west-2.compute.amazonaws.com:/home/ec2-user/firstweb/

Remember, the above command is from your local end.

Next, login SSH and install requirements.txt:

ssh ec2helloworld

Delete the former venv

sudo rm -rf venv_winjob

Create a new one:

python3 -m venv venv_winjob

Install libraries:

source /home/ec2-user/firstweb/venv_winjob/bin/activate

pip install -r /home/ec2-user/firstweb/requirements.txt

Test:

cd ~/firstweb

gunicorn --workers 3 --bind 0.0.0.0:5000 app:app

If the web is available, then restart config files:

sudo systemctl restart firstweb.service