# Python Google Cloud Microservices Example - API Gateway

This example demonstrates how to deploy multiple python services to [App Engine flexible environment](https://cloud.google.com/appengine/docs/flexible/)

## To Run Locally

Use [virtualenv](https://virtualenv.pypa.io/en/stable/) to set up each
service's environment and start the each service in a separate terminal.

Open a terminal and start the first service:

```Bash
$ cd gateway-service
$ virtualenv -p python3 env
$ source env/bin/activate
$ pip install -r requirements.txt
$ python main.py
```

In a separate terminal, start the second service:

```Bash
$ cd static-service
$ virtualenv -p python3 env
$ source env/bin/activate
$ pip install -r requirements.txt
$ python main.py
```

## To Deploy to App Engine

### YAML Files

Each directory contains an `app.yaml` file.  These files all describe a
separate App Engine service within the same project.

For the gateway:

[Gateway service <default>](gateway/app.yaml)

This is the `default` service.  There must be one (and not more).  The deployed
url will be `https://<your project id>.appspot.com`

For the static file server:

[Static file service <static>](static/app.yaml)

The deployed url will be `https://<service name>-dot-<your project id>.appspot.com`

### Deployment

To deploy a service cd into its directory and run:
```Bash
$ gcloud app deploy app.yaml
```
and enter `Y` when prompted.  Or to skip the check add `-q`.

To deploy multiple services simultaneously just add the path to each `app.yaml`
file as an argument to `gcloud app deploy `:
```Bash
$ gcloud app deploy gateway/app.yaml static/app.yaml
```