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# How to Start GN2 and GN3

This document describes how we run GN2 and GN3 on the current production setup.

This details how GN2/GN3 production are currently started. It's probably a good idea to create a shell script for starting GN3 like we have for GN2 at some point, since currently environment variables are set manually.

See also

=> systems/gn-services.gmi

# GN3

GN2 depends on GN3 for REST services and libraries.

1. Set PATH/PYTHONPATH/GN2_PROFILE environment variables

Example:

```
export GN2_PROFILE=/home/zas1024/opt/gn-latest-20221206
export PATH=$GN2_PROFILE/bin:$PATH
export PYTHONPATH="$GN2_PROFILE/lib/python3.9/site-packages"
```

2. Start GN3 from the relevant directory (in this case production

```
env FLASK_DEBUG=1 FLASK_APP="main.py" CORS_ORIGINS="http://gn2-zach.genenetwork.org:*,https://gn2-zach.genenetwork.org:*,http://genenetwork.org:*,https://genenetwork.org:*" flask run --port=8081
```

# GN2

1. Just run /home/gn2/production/run_production.sh