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Improved doc on deploying with GCP #5531

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Sep 24, 2023
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Improved doc on deploying with GCP #5531

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Merge pull request #1 from holoviz/main
pierrotsmnrd Jul 4, 2023
74fe4bd
Merge branch 'main' of https://github.com/pierrotsmnrd/panel into pie…
pierrotsmnrd Sep 24, 2023
7a7bb68
Improved docs on deploying with GCP
pierrotsmnrd Sep 24, 2023
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18 changes: 17 additions & 1 deletion doc/how_to/deployment/gcp.md
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Expand Up @@ -45,6 +45,22 @@ RUN pip install --no-cache-dir -r requirements.txt
CMD panel serve app.py --address 0.0.0.0 --port 8080 --allow-websocket-origin="*"
```

Finally, to deploy a Panel app to App Engine run `gcloud app create` and `gcloud app deploy`. To deploy a Panel app to Cloud Run, run `gcloud run deploy`.
Finally, to deploy a Panel app to App Engine run `gcloud app create` and `gcloud app deploy`.

## Deploying with Cloud Run

To deploy a Panel app to Cloud Run, run `gcloud run deploy`.

Panel apps use a websocket to the running Bokeh server. Websockets are considered by Cloud Run to be long-running HTTP requests.

If you deploy a panel app on GCP with Cloud Run, make sure you set up a long request timeout, with CLI parameter `--timeout=...`

The default timeout is 5 minutes, which makes the panel app lose its websocket connection after this time, leading to unresponsive UI, because Cloud Run considers the websocket as timed-out.

You can extend the timeout up to 60 minutes.

To extend the timeout duration, run `gcloud run deploy --timeout 60min`.

For detailed information and steps, check out this [example](https://towardsdatascience.com/deploy-a-python-visualization-panel-app-to-google-cloud-cafe558fe787?sk=98a75bd79e98cba241cc6711e6fc5be5) on how to deploy a Panel app to App Engine and this [example](https://towardsdatascience.com/deploy-a-python-visualization-panel-app-to-google-cloud-ii-416e487b44eb?sk=aac35055957ba95641a6947bbb436410) on how to deploy a Panel app to Cloud Run.

Regarding Cloud Run, check out the documentation about [Cloud run and WebSockets](https://cloud.google.com/run/docs/triggering/websockets) and about the [`--timeout` option](https://cloud.google.com/run/docs/configuring/request-timeout)