I need to debug (with chrome://inspect/ debugger) my nodejs app while it is deployed in a kubernetes pod. I tried adding a port to the service in front of the deployment but this is not working.
I added the port 42126
apiVersion: v1
kind: Service
metadata:
name: account-service # matches name in nginx.conf
spec:
ports:
- name: traffic
port: 80
targetPort: 80
- name: debug
port: 42126
targetPort: 42126
type: NodePort # speculating need this so nginx can route to this ???????
selector:
app: account-pod # matches name of pod created by deployment account-deployment
The deployment is not modified
apiVersion: apps/v1beta2 # for version 1.8, once 1.9 switch to apps/v1
kind: Deployment
metadata:
name: account-deployment # name of the deployment
spec:
replicas: 1
selector:
matchLabels:
app: account-pod # matches name of pod to create
template:
metadata:
labels:
app: account-pod # name of pod, matches deployment and service definition
spec:
containers:
- name: account-container # name of docker container
image: us.gcr.io/purple01-0000000/purple_account:2018_04_25_18_08
The docker image is created with the following. I know this works since I use it for debugging locally when running docker compose with all my modules.
FROM node:9.4
WORKDIR /app
COPY . /app/
RUN npm install
# comment out normal mode and created one for the debug
#CMD node ./bin/www
CMD node --inspect-brk=0.0.0.0:42126 ./bin/www
EXPOSE 80 42126
The configured ingress send the http traffic to an nginx service that serves static files and routes to various micro services.
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: basic-ingress
annotations:
kubernetes.io/ingress.global-static-ip-name: ingress-ip
spec:
tls:
- secretName: tls-secret
backend:
serviceName: purple-front-end-service
servicePort: 80
I am new to kubernetes, so any advice is appreciated.
One of the many things I don't get: ingress terminates https and sends the http to my purple-front-end-service (a nginx service). How is port 42126 on the account-service made available to the outside so I can connect to it via chrome?
What do I configure in the "Target discovery settings" for "chrome://inspect/#devices".
in the Dockerfile that creates your application, enable debugging (see line CMD)
FROM node:9.4
WORKDIR /app
COPY ./app.js /app/app.js
COPY ./package.json /app/package.json
RUN npm install
CMD node --inspect-brk=0.0.0.0:42132 ./bin/www
Using the "Google Cloud Platform" website Kubernetes Engine / Workloads / Select the deployment from the displayed list to show details. Scroll down to "Managed pods" and note the name.
In the detail section of the service there is a "port forwarding" button that reveals the command.
On your desktop, run the command using the pods name and port # you want to use. kubectl port-forward account-deployment-85f7dcf65b-v27zx 8080:42126