Initial commit

# How to Contribute

We'd love to accept your patches and contributions to this project. There are

just a few small guidelines you need to follow.

## Development Principles (for Googlers)

There are a few principles for developing or refactoring the service

implementations. Read the [Development Principles

Guide](./docs/development-principles.md).

## Contributor License Agreement

Contributions to this project must be accompanied by a Contributor License

Agreement. You (or your employer) retain the copyright to your contribution;

this simply gives us permission to use and redistribute your contributions as

part of the project. Head over to <https://cla.developers.google.com/> to see

your current agreements on file or to sign a new one.

You generally only need to submit a CLA once, so if you've already submitted one

(even if it was for a different project), you probably don't need to do it

again.

## Code reviews

All submissions, including submissions by project members, require review. We

use GitHub pull requests for this purpose. Consult

[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more

information on using pull requests.

## Community Guidelines

This project follows [Google's Open Source Community

Guidelines](https://opensource.google.com/conduct/).

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# This configuration file is used to build and deploy the app into a 

# GKE cluster using Google Cloud Build.

#

# PREREQUISITES:

# - Cloud Build service account must have role: "Kubernetes Engine Developer"

# USAGE:

# GCP zone and GKE target cluster must be specified as substitutions

# Example invocation:

# `gcloud builds submit --config=cloudbuild.yaml --substitutions=_ZONE=us-central1-b,_CLUSTER=demo-app-staging .`

steps:

- id: 'Deploy application to cluster'

  name: 'gcr.io/k8s-skaffold/skaffold:v0.20.0'

  entrypoint: 'bash'

  args: 

  - '-c'

  - > 

    gcloud container clusters get-credentials --zone=$_ZONE $_CLUSTER;

    skaffold run -f=skaffold.yaml --default-repo=gcr.io/$PROJECT_ID;

# Add more power, and more time, for heavy Skaffold build

timeout: '3600s'

options:

  machineType: 'N1_HIGHCPU_8'

 No newline at end of file

# Development Principles

> **Note:** This document outlines guidances behind some development decisions

> behind the Hipster Shop demo application.

### Minimal configuration

Running the demo locally or on GCP should require minimal to no

configuration unless absolutely necessary to run critical parts of the demo.

Configuration that takes multiple steps, especially such as creating service

accounts should be avoided.

### App must work well outside GCP

Demo application should work reasonably well when it is not deployed to GCP

services. The experience of running the application locally or on GCP should

be close.

For example:

- OpenCensus prints the traces to stdout when it cannot connect to GCP.

- Stackdriver Debugging tries connecting to GCP multiple times, eventually gives

  up.

### Running on GCP must not reduce functionality

Running the demo on the GCP must not reduce/lose any of the capabilities

developers have when running locally.

For example: Logs should still be printed to stdout/stderr even though logs are

uploaded to Stackdriver Logging when on GCP, so that developers can use "kubectl

logs" to diagnose each container.

### Microservice implementations should not be complex

Each service should provide a minimal implementation and try to avoid

unnecessary code and logic that's not executed.

Keep in mind that any service implementation is a decent example of “a GRPC

application that runs on Kubernetes”. Keeping the source code short and

navigable will serve this purpose.

It is okay to have intentional inefficiencies in the code as they help

illustrate the capabilities of profiling and diagnostics offerings.