Appengine appears to be serving from the wrong region

[Eli Dourado]

I have an appengine app that I created in the europe-west region that has been running fine for months, but inexplicably, a couple days ago it seems to have stopped being served from that region. I am using the app to access the Betfair API, which is restricted from the US but available in Europe. Because of the sudden change, the app's attempts to log in to Betfair are now failing. In the console, the location is still listed as europe-west, but I guess the IP it is being served from geolocates to Mountain View, and this is breaking my app. What can I do? Is there a configuration option for app.yaml or something similar to force the app to serve from Europe?

[Adam (Cloud Platform Support)]

Are you accessing the Betfair API via URL Fetch or Sockets? Are you able to share the feedback from Betfair on which IP is sending the request? Also, does Betfair share any information on how they perform geolocation on IPs (such as a public database, regional registry lookup or other method)?

One thing you could try is switching to Sockets if you are currently using URL Fetch or vice-versa.

[Eli Dourado]

Thanks for the reply, Adam. I’m using a library that uses a socket because I need to access Betfair with a client-side certificate. Is there a way to use a client-side certificate with URL Fetch?

Relevant Go code for the method that communicates with Betfair is here:

cert, err := tls.LoadX509KeyPair(s.config.CertFile, s.config.KeyFile)

if err != nil {

return nil, err

}

ssl := &tls.Config {

Certificates: []tls.Certificate{cert},

InsecureSkipVerify: true,

}

ssl.Rand = rand.Reader

s.httpClient = &http.Client {

Transport: &http.Transport {

Dial: func(network, addr string) (net.Conn, error) {

return socket.Dial(c, network, addr)

},

TLSClientConfig: ssl,

},

}

res, err := s.httpClient.Do(req)

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[Adam (Cloud Platform Support)]

Currently client-side certificates are only supported when using Sockets. There is an open issue to add support for them in URL Fetch in the future. However there is no guarantee that using URL Fetch would solve your problem.

It may be helpful to find out how BetFair performs its geolocation (eg. is it route based or simply a RIR lookup on the originating IP?). You may need to set up an intermediate proxy in order to work around BetFair's method of geolocation.

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[Eli Dourado]

Thanks, Adam. The frustrating thing is that my site was working for months, and then suddenly stopped. I’m not sure if the change was on Google’s end or Betfair’s. But I will check with them.

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