A minimalistic example of an image processing web app accessing a PostgreSQL [1] database and a minio object store written in Go [2]. For each incoming image a message is posted to a RabbitMQ [5] message queue.
This application is part of an exam for the free anynines Kubernetes Training.
This code contains refactoring challenges for the training participants. It implements the "happy path" - there is little to no error handling - and thus is rather fragile.
go mod init github.com/fischerjulian/irmgard
Assumptions:
- RabbitMQ is available via local network
- PostgreSQL is available via local network
Assuming there is a PostgreSQL server running with a user postgres and an empty database postgresl:
POSTGRES_HOST=<postgresql-host> POSTGRES_USERNAME=<postgresql-username> POSTGRES_PASSWORD=<postgresl-password> go run main.go
e.g.
POSTGRES_HOST=localhost POSTGRES_USERNAME=postgres POSTGRES_PASSWORD=xxx go run main.go
TODO Create a Dockerfile and build a container image. As a hint, the workflow of creating a Docker container image is stated below.
docker image build -t irmgard:0.3.0 .
docker image tag irmgard:0.3.0 fischerjulian/irmgard:0.3.0
docker image push fischerjulian/irmgard:0.3.0
docker image pull fischerjulian/irmgard:0.3.0
In order to run the image you will also have to set the env vars POSTGRES_HOST and POSTGRES_PASSWORD which is not contained in the examples below as the images will be used in the context of Kubernetes, only.
Run local image with version tag 0.3.0:
docker container run -p 8080:8080 irmgard:0.3.0
Run remote image with version tag 0.3.0:
docker container run -p 8080:8080 fischerjulian/irmgard:0.3.0
curl -F 'image=@/Users/jfischer/Downloads/000d8ea8207c6d7dae321da11083a312.jpg' localhost:8080- PostgreSQL, https://www.postgresql.org/
- Go, https://golang.org/
- Go PQ, https://github.com/lib/pq
- RabbitMQ, https://www.rabbitmq.com/
- RabbitMQ Go Introduction, https://www.rabbitmq.com/tutorials/tutorial-one-go.html