从Flex迁移到标准版时，GAE Go 1.11实例启动问题

Question

I am in the process of migrating a simple app using the Go 1.11 runtime from the AppEngine flex environment to the standard environment because flex got shockingly expensive for my low-traffic site (and standard wasn't available for this runtime until recently). Every time GAE hits the /_ah/start endpoint for my app it logs a 301 and the following error: Process terminated because it failed to respond to the start request with an HTTP status code of 200-299 or 404.

My server does have a handler for /_ah/start that simply writes a 200 and works fine locally. I also tried adding a handler for all routes in app.yaml just to make sure requests to the AppEngine load balancer are actually being routed to my server, but it still isn't working. I know from the service logs that my server is starting and listening on the correct port but it gets restarted over and over and can't actually handle any requests because of this issue with the GAE start request.

Here's my app.yaml:

runtime: go111
instance_class: B1
basic_scaling:
  max_instances: 1
handlers:
- url: /.*
  script: auto

Edit: Here's a screenshot of the logs

Answer 1

The application redirects http to https per discussion in the comments.

An application running in the standard environment must serve http. The App Engine infrastructure handles https.

Fix by removing the redirect from http to https.