I am currently running a django app under python3 through kubernetes by going through skaffold dev
. I have hot reload working with the Python source code. Is it currently possible to do interactive debugging with python on kubernetes?
For example,
def index(request):
import pdb; pdb.set_trace()
return render(request, 'index.html', {})
Usually, outside a container, hitting the endpoint will drop me in the (pdb)
shell.
In the current setup, I have set stdin
and tty
to true
in the Deployment
file. The code does stop at the breakpoint but it doesn't give me access to the (pdb)
shell.
There is a kubectl
command that allows you to attach to a running container in a pod:
kubectl attach <pod-name> -c <container-name> [-n namespace] -i -t
-i (default:false) Pass stdin to the container
-t (default:false) Stdin is a TTY
It should allow you to interact with the debugger in the container. Probably you may need to adjust your pod to use a debugger, so the following article might be helpful:
There is also telepresence tool that helps you to use different approach of application debugging:
Using telepresence allows you to use custom tools, such as a debugger and IDE, for a local service and provides the service full access to ConfigMap, secrets, and the services running on the remote cluster.
Use the
--swap-deployment
option to swap an existing deployment with the Telepresence proxy. Swapping allows you to run a service locally and connect to the remote Kubernetes cluster. The services in the remote cluster can now access the locally running instance.
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