I'm trying to deploy a gRPC server with kubernetes, and connect to it outside the cluster. The relevant part of the server:
function main() {
var hello_proto = grpc.loadPackageDefinition(packageDefinition).helloworld;
var server = new grpc.Server();
server.addService(hello_proto.Greeter.service, {sayHello: sayHello});
const url = '0.0.0.0:50051'
server.bindAsync(url, grpc.ServerCredentials.createInsecure(), () => {
server.start();
console.log("Started server! on " + url);
});
}
function sayHello(call, callback) {
console.log('Hello request');
callback(null, {message: 'Hello ' + call.request.name + ' from ' + require('os').hostname()});
}
And here is the relevant part of the client:
function main() {
var target = '0.0.0.0:50051';
let pkg = grpc.loadPackageDefinition(packageDefinition);
let Greeter = pkg.helloworld["Greeter"];
var client = new Greeter(target,grpc.credentials.createInsecure());
var user = "client";
client.sayHello({name: user}, function(err, response) {
console.log('Greeting:', response.message);
});
}
When I run them manually with nodeJS, as well as when I run the server in a docker container (client is still run with node without a container) it works just fine.
The docker file with the command: docker run -it -p 50051:50051 helloapp
FROM node:carbon
# Create app directory
WORKDIR /usr/src/appnpm
COPY package.json .
COPY package-lock.json .
RUN npm install
COPY . .
CMD npm start
However, when I'm deploying the server with kubernetes (again, the client isnt run within a container) I'm not able to connect.
The yaml file is as follows:
apiVersion: apps/v1
kind: Deployment
metadata:
name: helloapp
spec:
replicas: 1
selector:
matchLabels:
app: helloapp
strategy: {}
template:
metadata:
labels:
app: helloapp
spec:
containers:
image: isolatedsushi/helloapp
name: helloapp
ports:
- containerPort: 50051
name: helloapp
resources: {}
status: {}
---
apiVersion: v1
kind: Service
metadata:
name: helloservice
spec:
selector:
app: helloapp
ports:
- name: grpc
port: 50051
targetPort: 50051
The deployment and the service start up just fine
kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
helloservice ClusterIP 10.105.11.22 <none> 50051/TCP 17s
kubectl get pods
NAME READY STATUS RESTARTS AGE
helloapp-dbdfffb-brvdn 1/1 Running 0 45s
But when I run the client it can't reach the server.
Any ideas what I'm doing wrong?
