How to deploy a Vizro app to Heroku? about vizro

[pieterseyns]

Thanks it is working now

[maxschulz-COL]

Hey @pieterseyns ,

thank you for posting this question, much appreciated!

Have you checked our guide on the different run methods and deployments: https://vizro.readthedocs.io/en/stable/pages/user_guides/run/#deployment-of-vizro-app

It seems to me that you may want to do:

app = Vizro().build(dashboard)
server = app.dash.server

where dashboard could be you create_dashboard function.

Let us know if this did not work, and we can try further.

[antonymilne]

@pieterseyns by Heroic do you mean Heroku? If so then I can confirm this works well because I tried it out just yesterday 🙂

Just to add to what @maxschulz-COL said, the basic things you need on Heroku are:

1. Procfile with web: gunicorn app:server
2. requirements.txt with vizro and gunicorn
3. As per the above, put your app in app.py exposing the underlying Flask server by doing app = Vizro().build(dashboard); server = app.dash.server
4. Custom assets go in assets folder and are picked up automatically
5. That’s it! Everything works straight away. Just push to Heroku and it will deploy

So the deployment process is really identical to Dash, just the server object in Vizro is nested one level deeper in app.dash.server rather than app.server as it is in Dash. I recommend these articles on deploying Dash which give further guidance and common pitfalls on deploying to Heroku:

• https://dash.plotly.com/deployment
• https://towardsdatascience.com/deploying-your-dash-app-to-heroku-the-magical-guide-39bd6a0c586c