Testing

Run Test Server for local SVG debugging from metpy

python3 -m http.server 8000

List a chart bucket SVGs for a user

aws s3 ls s3://meteo-charts/skewt-diagrams/skewt-dumps_user_2seeKmUaxI6vzlvi1jzLguWFQZ8/chart_2025-04-02_17-48-31/

Delete all from S3 bucket

aws s3 rm s3://meteo-charts/skewt-diagrams --recursive

Download all SVGs from a specific folder (local testing)

aws s3 sync "s3://meteo-charts/skewt-diagrams/skewt-dumps_user_2seeKmUaxI6vzlvi1jzLguWFQZ8/chart_2025-04-02_17-48-31/" skewt/test/svg-dumps

Test EC2 endpoint WITHIN EC2 Instance:

Generates a skew-t for one day:
curl "http://localhost:5000/generate-skew?days=1&lat=32.52&lon=-93.75&user_id=user_2sirXuIdmQh7eiB3GwHxZlcQYbI"

Test EC2 endpoints OUTSIDE EC2 Instance:

curl -v "http://ec2-3-221-177-106.compute-1.amazonaws.com:5000/generate-skew?days=1&lat=52.537&lon=13.376&user_id=user_2sirXuIdmQh7eiB3GwHxZlcQYbI"

curl -v "http://ec2-3-221-177-106.compute-1.amazonaws.com:5000/generate-skew?days=1&lat=52.537&lon=13.376&user_id=user_2seeKmUaxI6vzlvi1jzLguWFQZ8"

Running in Production on EC2

.flaskenv

FLASK_APP=app.py
FLASK_RUN_HOST=0.0.0.0
FLASK_RUN_PORT=5000
FLASK_ENV=production

Gunicorn

Gunicorn enables us to keep out EC2 running with out an SSH/AWS EC2 Console open:
gunicorn -b 0.0.0.0:5000 app:app

The daemon for flask server:

Located located in etc/systemd/system

chart-server.service:

[Unit]
Description=Chart Server Flask App
After=network.target

[Service]
User=ubuntu
WorkingDirectory=/home/ubuntu/chart-server/src
ExecStart=/home/ubuntu/chart-server/.venv/bin/gunicorn -b 0.0.0.0:5000 app:app
Restart=always
Environment=FLASK_ENV=production

[Install]
WantedBy=multi-user.target

Start the chart-server service on EC2:

sudo systemctl daemon-reload
sudo systemctl start chart-server
sudo systemctl enable chart-server

Debugging:

Ensure the gunicorn server is running on port 5000: sudo lsof -i :5000

Expected output:

COMMAND   PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
gunicorn 8064 ubuntu    5u  IPv4  48835      0t0  TCP *:5000 (LISTEN)
gunicorn 8111 ubuntu    5u  IPv4  48835      0t0  TCP *:5000 (LISTEN)