I don’t understand what the mistake is.
A few questions about your attempt:
- Are you sure that the httpd instances on stapp01, stapp02, and stapp03 are actually running on port 8080? How did you check to determine that this was true? In my case, all 3 were running on 6100. The port will be randomized.
- Was your nginx setting valid? What happened if you tried
nginx -t? Did it validate your setting? - Was nginx running? The centos installer enables the service file, but does not start nginx.