i have a simple signalr application running on Kubernetes/Docker Container.
Which is really a Ping/Pong at this point. When i have it on local Docker it works perfectly.
But when i publish it via Jenkins to a Kubernetes cluster, it connects, handshake is successful, but heartbeat is never sent/recieved and disconnects with Error 1006.
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/microsoft-signalr/6.0.1/signalr.js"></script>
</head>
<body>
<script type="text/javascript">
const connection = new signalR.HubConnectionBuilder()
.withUrl("http://localhost:8081/ChatHub")
.configureLogging(signalR.LogLevel.Trace)
.build();
async function start() {
try {
await connection.start({jsonp: true});
console.log("SignalR Connected.");
} catch (err) {
console.log(err);
setTimeout(start, 5000);
}
};
connection.onclose(async () => {
await start();
});
// Start the connection.
start();
</script>
</body>
</html>[2022-04-18T17:37:22.313Z] Debug: Starting HubConnection.
[2022-04-18T17:37:22.314Z] Debug: Starting connection with transfer format 'Text'.
[2022-04-18T17:37:22.314Z] Debug: Sending negotiation request: http://localhost:8081/ChatHub/negotiate?negotiateVersion=1.
[2022-04-18T17:37:22.335Z] Debug: Selecting transport 'WebSockets'.
[2022-04-18T17:37:22.336Z] Trace: (WebSockets transport) Connecting.
[2022-04-18T17:37:22.344Z] Information: WebSocket connected to ws://localhost:8081/ChatHub?id=O5dgUQ2Tov6pEuy_sLYE-w.
[2022-04-18T17:37:22.345Z] Debug: The HttpConnection connected successfully.
[2022-04-18T17:37:22.346Z] Debug: Sending handshake request.
[2022-04-18T17:37:22.347Z] Trace: (WebSockets transport) sending data. String data of length 32.
[2022-04-18T17:37:22.347Z] Information: Using HubProtocol 'json'.
[2022-04-18T17:37:22.354Z] Trace: (WebSockets transport) data received. String data of length 3.
[2022-04-18T17:37:22.355Z] Debug: Server handshake complete.
[2022-04-18T17:37:22.355Z] Debug: HubConnection connected successfully.
SignalR Connected.
But it gets complicated when i put it on the live, Behind Ingress. SignalR Connects, gets and error and i reconnect via catch block and connects and gets disconnected again and again loop continues...
You can test here:
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/microsoft-signalr/6.0.1/signalr.js"></script>
</head>
<body>
<script type="text/javascript">
const connection = new signalR.HubConnectionBuilder()
.withUrl("https://streamt.acente365.com/ChatHub")
.configureLogging(signalR.LogLevel.Trace)
.build();
async function start() {
try {
await connection.start({jsonp: true});
console.log("SignalR Connected.");
} catch (err) {
console.log(err);
setTimeout(start, 5000);
}
};
connection.onclose(async () => {
await start();
});
// Start the connection.
start();
</script>
</body>
</html>My Dockerfile as follows:
FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/core/sdk:3.1-buster AS build
WORKDIR /src
COPY ["CoreHub.csproj", ""]
RUN dotnet restore "./CoreHub.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "CoreHub.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "CoreHub.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "CoreHub.dll"]
My Service.yml:
---
apiVersion: v1
kind: Service
metadata:
name: streamt-acente365-svc
namespace: acente365-microservice
spec:
selector:
app: streamt-acente365-app
ports:
- protocol: TCP
name: http
port: 80
targetPort: 80
type: ClusterIP
sessionAffinity: ClientIP
sessionAffinityConfig:
clientIP:
timeoutSeconds: 10800
My Ingress.yml as follows:
---
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: streamt-acente365-virtualhost
namespace: acente365-microservice
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/ssl-redirect: "false"
nginx.ingress.kubernetes.io/affinity: cookie
nginx.ingress.kubernetes.io/session-cookie-hash: sha1
nginx.ingress.kubernetes.io/session-cookie-name: REALTIMESERVERID
spec:
rules:
- host: streamt.acente365.com
http:
paths:
- path: /
backend:
serviceName: streamt-acente365-svc
servicePort: 80
tls:
- hosts:
- streamt.acente365.com
secretName: wildcard-acente365-com
I tried all the answers on StackOverflow but no luck. Can anybody please help me. Thank you.