Google App Engine (GAE)

Google App Engine is a fully manage microservices platform available in standard and flexible offerings. It is a :

• Serverless Environment
• Supports all main languages like Java, PHP, Node.js, Python, C#, .Net, Ruby and Go
• Open Platform
• Fully Managed Service
• Monitoring, logging, Diagnosis
• Application Versioning
• Elastic Computer
• Auto-scaling

How to Deploy GAE

Deployment is from the Google SDK or Cloud shell using:

Gcloud init

Gcloud auth login

Gcould app deploy

Traffic Splitting

• Works with LB
• Split traffic to different versions

GAE Microservices

GAE Scaling

• Manual scaling
• Auto-scaling – due to latency, CPU etc
• Scaling controlled by app. yaml

GAE Limits

• Max services per application = 5
• Maximum versions per application =5
• Maximum instances per vision with manual scaling = 20

GAE Engine Types

Flexible environment

• • Dockerized container images
  • Docker Image or docker file
  • Infrastructure customization
  • Custom Libraries
  • SSH for debugging
  • Deploy OWN docker containers
  • High Performance and can customize compute specs
  • Instances are health checked
  • Automatic locates to geography
  • Underline infrastructure managed by google
  • Always have ROOT access to VM instances

Standard environment

• • Pre-defined runtime
  • Libraries that support App Engine API
  • Cannot customise environment
  • Auto-scaling for demand – not able to customize

GAE Features

Figure 7- https://cloud.google.com/appengine/docs/the-appengine-environments