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0.1.0-rc.1 Jul 29, 2023
0.1.0-rc Jul 26, 2023

#625 in Asynchronous

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Freighter is a Rust private registry implementation designed to be, above all else, modular, fast and operationally boring. Freighter is intended to be something you can feel comfortable deploying and then ignoring until the end of time.


Freighter is a modular registry.

The freighter-server crate provides a hyper server implementation and accepts dependency-injected authentication, index, and storage providers, allowing users to construct customized and tailored binaries for their needs. Authentication, index, and storage traits are found in the freighter-auth, freighter-index, and freighter-storage crates. Sensible implementations (or in the case of the yes auth implementation, not-so-sensible implementations) can be found in those crates, although users should feel free to provide their own implementations to suit their needs.

The Freighter network of crates produce metrics via the metrics crate and structured logs via the tracing crate. Users rolling their own binaries can determine how and if those should be exported.

The freighter crate is a binary that exposes metrics and logs and hooks into postgres database(s) for authentication and index storage, and S3-compatible services for crate storage. It is, as was previously stated, not the be-all or end-all way to use freighter.


The desire to be operationally boring means that support for some optional things are explicit non-goals. For example, Freighter will likely never support git indexes, as those impose significant operational concerns for users and are difficult to design around.

Because of Freighter's modularity, it does not need to support everything out-of-the-box, so features that can be provided via trait implementations and which I deem to be "too niche" may not be accepted. That being said, I have a pretty limited definition of what is "too niche".


Regarding the user interface, there is none. This is largely because I am legally barred from user interface design by international human rights law, but also because no one has gotten around to this.

If you want to contribute a user interface for Freighter, PRs are welcome!

Running locally

To try out Freighter locally, start a postgres:14 server:

docker run -it -e POSTGRES_USER=freighter -e POSTGRES_PASSWORD=crates-crates-crates -p 5432:5432 -v /data:/var/lib/postgresql/data postgres:14

Run the migrations, e.g. with a locally installed psql:

PGPASSWORD=crates-crates-crates psql -U freighter -h localhost -f sql/init-index-db.sql
PGPASSWORD=crates-crates-crates psql -U freighter -h localhost -f sql/init-auth-db.sql

Next, we need an S3-compatible server. You can use an S3 emulator for testing purposes:

docker run -it -p 9090:9090 -e initialBuckets=crates -e validKmsKeys="arn:aws:kms:us-east-1:1234567890:key/valid-secret" -e debug=true -t adobe/s3mock

Finally, a config file using the above:

  address: ""
  download_endpoint: "{crate}/{version}"
  api_endpoint: ""
  metrics_address: ""

# for postgres backend
index_db: &db
  dbname: "freighter"
  user: "freighter"
  password: "crates-crates-crates"
  host: "localhost"
  port: 5432

# for filesystem backend
index_path: "/var/lib/freighter/index"

auth_db: *db

  name: "crates"
  endpoint_url: ""
  region: "us-east-1"
  access_key_id: "1234567890"
  access_key_secret: "valid-secret"

Start Freighter:

cargo run -p freighter -- -c config.yaml


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