assume you have docker and minikube installed started correctly

eval $(minikube docker-env)

use minikube internal docker daemon to build/use images locally

check out:

git clone https://github.com/hyw208/minikube_demo.git

change the path in demoapp-deployment.yaml, replace path "/Users/hyw208/Documents/Code/python/minikube_demo/demoapp" to match yours. Note, you have to have source code e.g. demo.py in the path you specified, otherwise the container will exit

build docker image

cd minikube_demo && docker build -t demoapp:demo .

add exe permission

chmod +x restart.sh

deploy

./restart.sh

get acutal ports, 30325 to access flask, 30547 for debug with rpdb

kubectl get service demoapp

e.g. 5000:30325/TCP,4444:30547/TCP

test flask app, IT WILL BLOCK WAITING FOR DEBUGGER

curl $(minikube ip):30325

bring up another console and use pdb to debug

nc $(minikube ip) 30547

you can change the code in demo.py under your path e.g. /Users/hyw208/Documents/Code/python/minikube_demo/demoapp/demo.py and changes should reflect asap

you can use kubectl to copy files/directories btw your host and remote pod,

kubectl cp demoapp-57fb996db7-vz9km:/demoapp/demo.py ./demo.py

'demoapp-57fb996db7-vz9km' is the pod, you can use kubectl get pods to find; '/demoapp/demo.py' is the pod's source code; './demo.py' just copy and put in current directory;

or just use docker cp, where '155286a1a608' is the container id you can get with 'docker ps' cmd

docker cp 155286a1a608:/demoapp ./demoapp

assume you have eclipse + pydev plugin and pip installed pydevd on host computer. if docker container is built with conda, you can export env into a requirements.txt or environment.yaml and create same conda env and configure pydev interpreter as prep step.

for IDE debug, you can use eclipse with pydev instead of rpdb, change the code in demo.py to the following:

import pydevd #import rpdb

pydevd.settrace("192.168.1.156", port=5678) #rpdb.set_trace('0.0.0.0')

ps. "192.168.1.156" is the host ip

change requirements.txt, replace rpdb with pydevd

build docker image again

docker build -t demoapp:demo .

deploy

./restart.sh

get acutal ports, 30325 to access flask, 30547 for debug with rpdb

kubectl get service demoapp

e.g. 5000:30325/TCP,5678:30547/TCP

open debug perspective in eclipse, and start PyDev server (it waits for remote pydevd to connect to back to IDE)

invoke flask app, it will cause pydevd to connect to eclipse via the pre-configured ip & port, e.g. 192.168.1.156 & 5678

curl $(minikube ip):30325

your PyDev server in eclipse will ask you to select the path to demo.py, you can ignore or provide your local copy and start debugging. If you ignore, you will be stepping with temp files downloaded from container

keep the docker image you previously built, demoapp-deployment.yaml, and the restart.sh and delete the rest

delete/comment out line 24~30 in demoapp-deployment.yaml, removing the volume mapping portion

re-deploy

restart.sh

get acutal ports, 30325 to access flask, 30547 for debug with rpdb

kubectl get service demoapp

e.g. 5000:30325/TCP,5678:30547/TCP

open debug perspective in eclipse, and start PyDev server (it waits for remote pydevd to connect to back to IDE)

invoke flask app, it will cause pydevd to connect to eclipse via the pre-configured ip & port, e.g. 192.168.1.156 & 5678

curl $(minikube ip):30325

your PyDev server in eclipse will ask you to select the path to demo.py and you can only ignore since you have no source code locally but should still be able to debug