Service on port 80

Question

In version 4.0.2 of Google Container Engine I am able to create a service on high ports 8080, 9000, etc but when I try lower ports 80, 81, etc, the service does not work. I have checked the firewall rules and tried with a brand new project without success. I have checked the release notes and there is a bug that prevents two services to reference the same port, but, that's not the case. Any hints of what might happen?

Port 80 is considered reserved for an HTTP server. Do you have one running on your system? Also, [this post](http://stackoverflow.com/questions/1694144/can-two-applications-listen-to-the-same-port) may answer your questions about services sharing a port. — Bob Kaufman, Nov 14 '14 at 21:31
The question is about Google kubernetes Container Engine, not about standard tcp/ip networking. I was refering to a kubernetes service not a standard service running in a single node (ex. Linux machine) — Joan Marc Carbo Arnau, Nov 14 '14 at 21:48

score 2 · Accepted Answer · answered Nov 15 '14 at 21:55

You currently cannot bind to a low port (1-1024) because the tcp proxying service runs as an unprivileged user. If you look in your logs you should see an error similar to:

E1030 07:10:54.345547 05091 proxier.go:411] Failed to get a socket for playground: listen tcp 0.0.0.0:80: bind: permission denied

This is why the examples all use high number ports.

You can try port 8080 or 8443 for standard unprivileged http/s ports until GKE supports binding to low numbered ports.

In version 0.5 you should be able to bind to any port. – Tim Hockin Nov 20 '14 at 02:49 — Tim Hockin, Nov 20 '14 at 02:49

Service on port 80

1 Answers1