Running Meteor app with Nginx SSL proxy on Kubernetes

In your NginX config, did you make sure to use the ip_hash flag to direct websockets to the same server each time? also you need to make sure the websocket Upgrade headers are forwarded:

upstream meteorapp{     ip_hash;     server   hostname:port}server {    # your server stuff here    #     location / {        proxy_pass                  http://meteorapp;        proxy_set_header            Host $host;        proxy_set_header            X-Real-IP $remote_addr;        proxy_http_version          1.1;        proxy_set_header            Upgrade $http_upgrade;        proxy_set_header            Connection "upgrade";        proxy_set_header            X-Forwarded-For $proxy_add_x_forwarded_for;        proxy_set_header            X-Forwarded-Proto http;        proxy_redirect              http:// $scheme://;    }}

The easiest way to run your app would be using Nginx based ingress controller instead of Nginx service.

In my opinion the easiest way to deploy ingress controller is with helm:https://docs.helm.sh/using_helm/#installing-helmhttps://kubeapps.com/charts/stable/nginx-ingress

But if you prefer not adding another tool to your stack you can use official installation guide: https://github.com/kubernetes/ingress-nginx/tree/master/deploy.

Example ingress object configuration with web sockets support can be found here: https://github.com/nginxinc/kubernetes-ingress/tree/master/examples/websocket