Summary

Python Flask app running in Gunicorn by default on port 8000 that is intended for testing containers, especially from Kubernetes

Image is based on python:3.10-slim-bullseye and is ~140Mb

Environment variables

• PORT - listen port, defaults to 8000
• APP_CONTEXT - base context path of app, defaults to '/'

Environment variables populated from Downward API

• MY_NODE_NAME - name of k8s node
• MY_POD_NAME - name of k8s pod
• MY_POD_IP - k8s pod IP
• MY_POD_SERVICE_ACCOUNT - service account of k8s pod

Prerequisites

• make utility (sudo apt-get install make)

Makefile targets

• docker-build (builds image)
• docker-run-fg (runs container in foreground, ctrl-C to exit)
• docker-run-bg (runs container in background)
• k8s-apply (applies deployment to kubernetes cluster)
• k8s-delete (removes deployment on kubernetes cluster)

Docker images

fabianlee/docker-gunicorn-hello-world-web:1.0.0

git tag -a 1.0.0 -m "version 1.0.0 of build does not have New Relic agent" git push --tags

fabianlee/docker-gunicorn-hello-world-web:2.0.0

git tag -a 2.0.0 -m "version 2.0.0 of build has New Relic agent instrumentation" git push --tags