A small project on container images
Using go to hash the contents of a file and then use the has as the file name (address)
I've been learning about the OCI Image Specification, particularly how image layers and content-addressable storage work.
To better understand the concept, I decided to build a small project in Go.
The program takes a string, hashes it using SHA-256, converts the digest to hexadecimal, and uses it as the file's address.
It then stores the original string as bytes inside a file following a "blobs/sha256/" directory structure.
It's a simple implementation, but it helped me get a better feel for a few concepts:
- How SHA-256 digests can be used to identify content.
- How content-addressable storage works.
- How the blob storage layout in OCI relates to storing data by its digest.
- How content-addressable storage works.
- How the blob storage layout in OCI relates to storing data by its digest.
This isn't an OCI-compliant image store or a production-ready tool. It's a simple hands-on exercise to understand the fundamentals behind a system I'm currently learning about.
One thing I'm learning as I explore DevOps is that sometimes the best way to understand new technology is to implement a small piece of the idea yourself.
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