working around Google Cloud Run request limit of 32 MB

[nazarewk]

Google Cloud Run imposes limit of 32MB requests when using HTTP/1 interfering heavily with Attic uploads.

It could be solved by either:

• [Feature Request] use pre-signed URLs to upload directly to the bucket (work around 413 errors) #121
• using HTTP/2.

According to the reqwest docs HTTP/2 should be enabled by default, but somehow I'm encountering this error.

[nazarewk]

FYI: you need to go to Cloud Run's Networking tab and tick Use HTTP/2 end-to-end, it fixes 413 Request Entity Too Large by using HTTP/2.

If you don't do that the connection will get downgraded to HTTP/1.1 between Cloud Run load balancer and the application resulting in 413 errors.

• see https://cloud.google.com/run/docs/configuring/http2
• Terraform doesn't support this option

[nazarewk]

Looks like Terraform does support it, but it's well camoflagued under h2c port name inside the container config.

https://cloud.google.com/run/docs/configuring/http2#terraform