I am using Google Compute Engine. I have setup deployment manager and it set's up a firewall that allows network LB to connect to web servers, the web servers themselves adds them to a Instance Group Manager and it set's up an Autoscaler that targets the Instance Group Manager, HTTP Health Check is setup that will execute against web server instances its adds the HTTP Health Checks to a backend service and adds the Instance Group Manager to the backend service, it set's up a URL Map that has the backend service as it's default Service the url mapper in its turn are added to the HTTP Proxy that is pointed at by a Forwarding Rule that have a global IP.
This setup is very similar to the setup described here https://cloud.google.com/solutions/scalable-and-resilient-apps
So now to the problem that I cans seem to solve for this setup. I have a Nginx server running on the web servers and it responds to requests and I am able to create event source connections to it but after exactly 1 minute the connection is closed with the error INCOMPLETE_CHUNKED_ENCODING. This do not happen if I connect directly to one of the web servers. I have changed the sysconf setting for tcp keepalive to:
net.ipv4.tcp_keepalive_time=600 net.ipv4.tcp_keepalive_intvl=15 net.ipv4.tcp_keepalive_probes=5
This after reading https://cloud.google.com/compute/docs/troubleshooting#networktraffic
I have tried countless things in the nginx config and can not seam to find a solution.
Do any one have any idea or similar problems?