Does Google Cloud CDN not store data from the storage bucket?

I've been experimenting with combining a Load Balancer, Cloud Storage, and CDN for the past few weeks. Unfortunately, I have not been successful in getting it to work as expected.

I uploaded some static files (2 jpgs, svgs, and css files) to a multi-regional US bucket (I also tried regional buckets), but it seems that the caching is not functioning correctly.

Whenever I check the headers, all I see is the same bucket metadata:

https://i.sstatic.net/1rDyH.png

The cache controls are properly set, as indicated by the v=2 at the top. I have tried different ways to configure caching, including cache strings, but none of them seem to be working. The Load Balancer is functional because this IP address resolves from it.

What could I possibly be doing wrong?

You can view the links here:



csscachinggoogle-cloud-platformgoogle-cloud-storagecdn

Answer №1

It appears that the correct metadata is being used.

 Cache-Control: public, max-age=604800

It would be beneficial to analyze the distribution of requests served by the CDN versus those retrieved from the bucket. You can execute a query using 'gcloud beta logging' to perform this assessment:

Requests from CDN

$ gcloud beta logging read 'resource.type="http_load_balancer" AND "logo.svg" AND httpRequest.cacheHit=true  AND timestamp>="2017-12-04T07:23:00.054257251Z"' | wc -l

Requests from your bucket

$ gcloud beta logging read 'resource.type="http_load_balancer" AND "logo.svg" AND httpRequest.cacheHit=false  AND timestamp>="2017-12-04T07:23:00.054257251Z"' | wc -l

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