PyOtelDemoApp

Introduction

A proof of concept of a containerized app with OpenTelemetry instrumentation, written in Python.

Environment

A Python virtual environment should be used, for instance:

virtualenv venv-k8sdemo
.\venv-k8sdemo\Scripts\activate

This app requires that Python 3 (developed on version 3.13) is available and the following dependences have been installed:

• Flask
  • pip install Flask
• OpenTelemetry
  • pip install opentelemetry-distro opentelemetry-exporter-otlp
  • opentelemetry-bootstrap -a install

The OpenTelemetry endpoint can be set using the predefined environment variables in the OpenTelemetry library. Example: $Env:OTEL_EXPORTER_OTLP_ENDPOINT = 'http://otlp-http.rtcalc.com:80'

Docker image

Build

docker build -t janben/pydemoapp:X . docker image tag janben/pydemoapp:X janben/pydemoapp:latest

Push

docker login docker image push janben/pydemoapp:X docker image push janben/pydemoapp:latest

Run

docker run -it janben/pydemoapp:X --name pydemoapp -e OTEL_EXPORTER_OTLP_ENDPOINT='http://otlp-http.rtcalc.com:80' -p 5000:5000

Examples:

• http://127.0.0.1:5000/math?first=1&second=5&operator=add
• http://127.0.0.1:5000

Helm

Build

docker login -u janben helm package .\pydemoapp
helm push .\pydemoapp-X.Y.Z.tgz oci://registry-1.docker.io/janben

Install

helm upgrade --install pydemoapp oci://registry-1.docker.io/janben/pydemoapp -n demoapps --create-namespace -f values.yaml --version X.Y.Z