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+# How to Start GN2 and GN3
+
+This document describes in a short how we run GN2 and GN3 on the current production setup.
+
+Note that we should replace this with a system container.
+
+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.
+
+## Environment
+
+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"
+```
+
+## Start development on port 8081
+
+Start GN3 from the relevant directory
+
+```
+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
+```
+
+GN3 has a settings.py file now. See the README.
+
+## Start production on port 8087
+
+```
+gn2@tux01:
+cd ~/gn3_production/genenetwork3
+gunicorn --bind 0.0.0.0:8087 --workers 8 --keep-alive  6000 --max-requests 10 --max-requests-jitter 5 --timeout 1200 wsgi:app
+```
+
+Note I had to comment out some oauth stuff on the latest.
+
+
+# GN2
+
+1. Just run /home/gn2/production/run_production.sh