Research Outgoing web hooks with GAE

[hwakabh]

To allow notifications for Production deployment, need to add Outgoing web hooks to call heroku2-slack hookers on Heroku, which' re having external API to pushing notification to Personal Slack Channel.

[hwakabh]

Pipeline design considerations:

• Requirements
  • CD: automatically deploy to GAE environments when there will some updates on master branch
  • Passing environmental variables
  • Remove secret data from GAE configuration file (appconfig.yaml)
  • Allow app to fetch these environmental variables from source code, in case using Node.js there shoud be process.env.VARNAME

Considering these requirements, it's decided that some multiple services in GCP:

• GAE, for application runtimes
• Cloud Build, for automatic deployment
• GCS & KMS, for storing environmental variables securely

Also, for encrypting application values, it's required to use berglars for allowing application to fetch these data. https://github.com/GoogleCloudPlatform/berglas Note that source codes of berglas are under the official GCP GitHub repository, this software is not official product provided as GCP services.