Cloudflare R2

This document explains how to setup your system for authenticating to R2 using the credential helper.

Authentication

R2 has an S3-compatible API that requires the creation of special tokens. These are different from normal user tokens and are only used for R2.

Create an API token by following the documentation
Set the R2_ACCESS_KEY_ID and R2_SECRET_ACCESS_KEY environment variables when running Bazel or other tools

Add to your .bazelrc:

common --credential_helper=*.r2.cloudflarestorage.com=%workspace%/tools/credential-helper