I talked previously about needing to decode docker HTTP headers to debug a registry issue. That debugging session was super fun, but I had a few questions about how that interaction actually works. So I started to decode all of the HTTP requests and responses from a $(docker pull), which truly helped me solidify how the docker daemon (dockerd) talks to a container registry. I figured I would share my notes here so I (as well as anyone else on the ‘net) can reference them in the future.
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