Apologies for the delay. We had a hard deadline so we ended up just going with Google Compute Engine and Google Cloud CDN. We ended up taking down these trees to reduce server costs but for the record, the issue remains unresolved and I saw some other folks talking about it in the public slack group.
On Tue, Aug 9, 2016 at 7:42 AM, 'Nick (Cloud Platform Support)' via Google App Engine <[email protected]> wrote: > Hey Matt, > > Is this issue still occurring? Let me know if I can assist in any way! > > Regards, > > Nick > Cloud Platform Community Support > > > On Thursday, August 4, 2016 at 3:56:04 PM UTC-4, Matt Mohebbi wrote: >> >> Hi Christian, >> >> Thanks for the response. Yes, we have read about the Google Frontend >> being picky about Vary params (I imagine they don't want people blowing >> through their cache by putting dumb things in there). As a result, we are >> only sending vary for content type. >> >> And what's odd is that the same code running in two different appengine >> projects give different behavior (and this has been consistent now for two >> weeks!). As I mentioned before, we also pushed the same code to GCE + >> Google Cloud CDN and it works just fine there too. >> >> My understanding is that the cache is not guaranteed but what's odd is >> that both projects are for testing are are hardly used (despite the name, >> iodine-web-prod is not in use until we can figure out this bug!). >> >> -matt >> >> On Thu, Aug 4, 2016 at 12:07 PM, Christian F. Howes < >> [email protected]> wrote: >> >>> While we have not tried this with flexible runtimes, on standard GAE we >>> are using cache-control, and pragma headers. we do not use the vary >>> header. while not documented the GAE support folks confirmed that google's >>> caching proxy will not cache responses with certain values for the vary >>> header (like custom headers and language headers), so you might try >>> removing that from both systems. >>> >>> also last i checked the cache was not guaranteed, and it's possible if >>> your second app has low traffic that it's deemed not worth caching? this >>> area is a black box to me. >>> >>> cfh >>> >>> >>> On Wednesday, August 3, 2016 at 4:34:11 PM UTC-7, Nick (Cloud Platform >>> Support) wrote: >>>> >>>> Hey Matt, >>>> >>>> This is very interesting, and although I'd almost say it qualifies for >>>> a post to the Public Issue Tracker, we can also discuss it here, since it's >>>> somewhat broad, and it would be inconvenient to migrate all this info. >>>> >>>> Are you making your requests from behind any kind of proxy? This is >>>> something which comes to mind. >>>> >>>> I'll see if we can see anything from our end in the meantime. >>>> >>>> Cheers! >>>> >>>> Nick >>>> Cloud Platform Community Support >>>> >>>> On Monday, August 1, 2016 at 11:22:16 AM UTC-4, Matt Mohebbi wrote: >>>>> >>>>> I have a nodejs application I deploy to Appengine Flexible Environment >>>>> via a docker custom runtime. When I deploy to one project (iodine-test), I >>>>> get the great caching features of the Google Frontend: >>>>> >>>>> air:/tmp/plum/deploy-20160727-124350% curl -w >>>>> "@/Users/matt/bin/curl-time-format.txt" -o /dev/null -s " >>>>> http://iodine-test.appspot.com/drug/zoloft"; -v >>>>> >>>>> * Trying 216.58.194.209... >>>>> >>>>> * Connected to iodine-test.appspot.com (216.58.194.209) port 80 (#0) >>>>> >>>>> > GET /drug/zoloft HTTP/1.1 >>>>> >>>>> > Host: iodine-test.appspot.com >>>>> >>>>> > User-Agent: curl/7.43.0 >>>>> >>>>> > Accept: */* >>>>> >>>>> > >>>>> >>>>> < HTTP/1.1 200 OK >>>>> >>>>> < Content-Type: text/html; charset=utf-8 >>>>> >>>>> < ETag: W/"30a48-XHteNhi+a5i5072zCcVDyg" >>>>> >>>>> < Vary: Accept-Encoding >>>>> >>>>> < Via: irbk129:14580 >>>>> >>>>> < X-Cloud-Trace-Context: 02917deaade7c823eed970361cd13ded;o=1 >>>>> >>>>> < Date: Mon, 01 Aug 2016 15:15:49 GMT >>>>> >>>>> < Server: Google Frontend >>>>> >>>>> < Content-Length: 199240 >>>>> >>>>> < Cache-Control: public, max-age=604800 >>>>> >>>>> < Age: 7 >>>>> >>>>> < >>>>> >>>>> { [6754 bytes data] >>>>> >>>>> * Connection #0 to host iodine-test.appspot.com left intact >>>>> >>>>> time_namelookup: 0.004 >>>>> >>>>> time_connect: 0.011 >>>>> >>>>> time_appconnect: 0.000 >>>>> >>>>> time_pretransfer: 0.011 >>>>> >>>>> time_redirect: 0.000 >>>>> >>>>> time_starttransfer: 0.023 >>>>> >>>>> ---------- >>>>> >>>>> time_total: 0.048 >>>>> >>>>> >>>>> However, when I deploy this same application to a different project >>>>> (iodine-web-prod), caching doesn't occur on *any* of the requests, >>>>> regardless of how often I request the same resource. >>>>> >>>>> >>>>> air:/tmp/plum/deploy-20160727-124350% curl -w >>>>> "@/Users/matt/bin/curl-time-format.txt" -o /dev/null -s " >>>>> http://iodine-web-prod.appspot.com/drug/zoloft"; -v >>>>> >>>>> * Trying 216.58.195.241... >>>>> >>>>> * Connected to iodine-web-prod.appspot.com (216.58.195.241) port 80 >>>>> (#0) >>>>> >>>>> > GET /drug/zoloft HTTP/1.1 >>>>> >>>>> > Host: iodine-web-prod.appspot.com >>>>> >>>>> > User-Agent: curl/7.43.0 >>>>> >>>>> > Accept: */* >>>>> >>>>> > >>>>> >>>>> < HTTP/1.1 200 OK >>>>> >>>>> < Content-Type: text/html; charset=utf-8 >>>>> >>>>> < Cache-Control: public, max-age=604800 >>>>> >>>>> < ETag: W/"30a48-XHteNhi+a5i5072zCcVDyg" >>>>> >>>>> < Vary: Accept-Encoding >>>>> >>>>> < Via: iwer4:25789 >>>>> >>>>> < X-Cloud-Trace-Context: fd82e108c58b92e3114028fdfcd22105;o=1 >>>>> >>>>> < Date: Mon, 01 Aug 2016 15:16:46 GMT >>>>> >>>>> < Server: Google Frontend >>>>> >>>>> < Content-Length: 199240 >>>>> >>>>> < >>>>> >>>>> { [15256 bytes data] >>>>> >>>>> * Connection #0 to host iodine-web-prod.appspot.com left intact >>>>> >>>>> time_namelookup: 0.005 >>>>> >>>>> time_connect: 0.010 >>>>> >>>>> time_appconnect: 0.000 >>>>> >>>>> time_pretransfer: 0.010 >>>>> >>>>> time_redirect: 0.000 >>>>> >>>>> time_starttransfer: 1.503 >>>>> >>>>> ---------- >>>>> >>>>> time_total: 1.536 >>>>> >>>>> >>>>> I've combed through the bits and pieces of unofficial documentation: >>>>> >>>>> >>>>> https://code.google.com/p/googleappengine/issues/detail?id=2258 >>>>> >>>>> https://web.archive.org/web/20110826081218/http://www.kyle- >>>>> jensen.com/proxy-caching-on-google-appengine >>>>> >>>>> https://groups.google.com/forum/#!topic/google-appengine/ >>>>> 6xAV2Q5x8AU/discussion >>>>> >>>>> >>>>> And also reviewed the documentation for Google Cloud CDN assuming that >>>>> the policies outlined there are the same as those applied to Appengine. >>>>> >>>>> >>>>> https://cloud.google.com/cdn/docs/caching >>>>> >>>>> >>>>> However, nothing explains why I would be getting this inconsistent >>>>> behavior between projects. 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