How to adapt to a kubernetes path change in Python Flask routes - python-3.x

Question

I have a Python Flask app I've deployed on IBM Kubernetes Service. My deployment YAML specifies path: /, which is handled in my code with #app.route('/'). That works fine. I then attempted to move the app by changing path: / to path: /foo in my deployment YAML. I was expecting the request coming into my app to still come in as /, but it's coming in as /foo. Ultimately what I'm trying to do is to be flexible in the deployment of the app without having the change source code. I don't see a way in either Kubernetes or Flask to create this level of indirection. Am I missing something?
Original YAML:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: my-ingress
spec:
tls:
- hosts:
- my....us-east.containers.appdomain.cloud
secretName: my...
rules:
- host: my....us-east.containers.appdomain.cloud
http:
paths:
- path: /
backend:
serviceName: my-service
servicePort: 5000

Answer 1

Need to check the content of your ingress yaml definition.
Here's an example yaml definition with rewrites
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/rewrite-target: /$2
name: rewrite
namespace: default
spec:
rules:
- host: rewrite.bar.com
http:
paths:
- backend:
serviceName: http-svc
servicePort: 80
path: /something(/|$)(.*)
For example, the ingress definition above will result in the following rewrites:
rewrite.bar.com/something rewrites to rewrite.bar.com/
rewrite.bar.com/something/ rewrites to rewrite.bar.com/
rewrite.bar.com/something/new rewrites to rewrite.bar.com/new
You can check Nginx Ingress controller Rewrite annotations here. You can also customize Ingress routing with annotations on IBM Cloud following the documentation here