gcloud-functions-selenium-boilerplate

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gcloud-functions-selenium-boilerplate

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A simple boilerplate for using Selenium with Google Cloud functions.

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# Google Cloud Function Selenium Example

Extends [gcloud-function-boilerplate](https://github.com/ccorcos/gcloud-function-boilerplate) with Selenium.

**WARNING** The maximum allowable memory for a gcloud function is 2GB. Deploying this example with only 1GB memory crashed. GCloud function also only allow a maximum of 9 minutes for your function to run. So be aware of these constraints before you build something on top of this!

## Setup
- [Signup for Google Cloud](https://console.cloud.google.com)
- Create a new project project.
- Install the `gcloud` cli tool.
	```sh
	brew cask install google-cloud-sdk
	```
- Login
	```sh
	gcloud auth login
	```
- Find the project id you just created and set it as the current project.
	```sh
	gcloud projects list
	gcloud config set project selenium-258105
	```

## Development
- (optional) If you want to use gcloud services, you'll need to create some credentials.
	```sh
	gcloud iam service-accounts create chet-dev
	```
- Add an owner policy
	```sh
	gcloud projects add-iam-policy-binding selenium-258105 --member "serviceAccount:chet-dev@selenium-258105.iam.gserviceaccount.com" --role "roles/owner"
	```
- Create the credentials file.
	```sh
	gcloud iam service-accounts keys create credentials.json --iam-account chet-dev@selenium-258105.iam.gserviceaccount.com
	```
- Start the development server (you may have to build the first bundle `npm run build` before you do this.)
	```sh
	npm start
	```
- Test that its working
	```sh
	curl http://localhost:8080/
	```

## Deploying
- [Read about it here](https://cloud.google.com/functions/docs/deploying/filesystem)
- Build the TypeScript files:
	```sh
	npm run build
	```
- Edit the package.json deploy script to reference the name of the function you want to deploy. Currently, it's called `selenium`.
- Deploy
	```sh
	npm run deploy
	```
- The deployment should log an endpoint url that you can test.
	```sh
	curl https://us-central1-selenium-258105.cloudfunctions.net/selenium
	```

**NOTE** you can modify the memory allocation and timeout of the function in the deploy script. Current defaults are maxed out at `--memory=2048MB --timeout=540s`.

## Resources
- https://www.toptal.com/nodejs/serverless-nodejs-using-google-cloud
- https://cloud.google.com/functions/docs/writing/
- https://cloud.google.com/functions/docs/functions-framework

gcloud-functions-selenium-boilerplate

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