This repository contains a simple Image Server web application. It is a sample implementation of the SRE Classroom: Distributed ImageServer using GCP services. The application allows users to upload photos in a few different formats, search photos by tags and then download them. It is meant to be used as a reference system for exploring the behavior of microservices running inside a Kubernetes cluster.
This is not an officially supported Google product.
The application consists of the following components:
- Load balancer (provided by GCP)
- UI frontend (Angular application)
- Upload frontend (Go application)
- Upload backend (Go application)
- Search frontend (Go application)
- Search backend (Go application)
- Download frontend (Go application)
- Download backend (Go application)
- Firestore database (provided by GCP)
- Cloud storage (provided by GCP)
User browser communicates with the frontend components by sending JSON requests. Frontend components communicate with the backends components using Protocol Buffers and gRPC. Backend components use the Firestore and Cloud storage for storing and retrieving image data.
New instance of an Image Server application can be created by following these steps:
- Open the GCP dashboard
- Create a new GCP project
- Create a new source repository inside the GCP project
- Import the Image Server code into the source repository
- Start a Cloud Shell for the GCP project
- In the Cloud Shell clone the source repository
- In the Cloud Shell run the
deploy.shscript - Access the web application after the Ingress IP address becomes available
Try logging into the application (no password is required) and uploading a new image. It seems like there is no response from the application (upload is failing). Can you find the source of the problem and fix it?
Upload frontend is unable to contact the upload backend due to a misconfiguration. Fix the Kubernetes configuration for the upload backend and deploy the application again. Check if the problem is resolved.