# Trow-Registry/trow

Container Registry and Image Management for Kubernetes Clusters

Repository: https://github.com/Trow-Registry/trow
Canonical: https://ross.abutalabs.com/products/trow
Homepage: http://trow.io/
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: docker, kubernetes, rust, oci-distribution, registry, containers, container-registry, docker-registry-cache
Last push: 2026-08-01T05:44:13+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 95, release rhythm 40, longevity 100
- inputs: {"age_days": 3283, "days_push": 32, "days_rel": 558, "gap_med": 7, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1028, forks 109 (observed 2026-08-28T04:03:17.527772+00:00)

## What it is
Trow is a lightweight OCI-compliant container image registry written in Rust that runs inside a Kubernetes cluster. It caches external images locally and enforces approve/deny lists via an admission webhook to control which images can run in the cluster.

## Use cases
- run a self-hosted container registry inside my kubernetes cluster
- cache docker images locally to speed up pulls and avoid rate limits
- restrict which container images are allowed to run in the cluster
- proxy and cache images from external registries like docker hub
- set up a lightweight private registry with a helm chart
- prevent unauthorized images from being deployed to kubernetes

## When to choose
- you run Kubernetes and want a small in-cluster registry with pull-through caching
- you need to lock down cluster images with allow/deny admission control
- you want a simple, low-resource OCI registry without running a heavyweight solution like Harbor

## When to avoid
- you need high availability or distributed registry architecture (still on the roadmap)
- you require full auditing and authentication of image access (planned, not implemented)
- you need a general-purpose registry outside Kubernetes with mature enterprise features

## Facets
- artifact type: service
- maturity: active
- function: container-runtime, http-server, security, caching, self-hosted
- domain: cloud-computing, self-hosted, infrastructure-as-code
- platform: rust, cloud, self-hosted
- tags: container-registry, oci-distribution, image-cache, kubernetes, admission-webhook, helm-chart, pull-through-cache, containers, devops, docker, linux

## Member repositories
- Trow-Registry/trow (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:17.527772+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:07:43.368082+00:00, confidence not recorded.
  - readme: https://github.com/Trow-Registry/trow (fetched 2026-08-28T04:03:17.527772+00:00, sha a3f960c57eb6)
  - homepage: http://trow.io/ (fetched 2026-08-29T13:07:31.916248+00:00, sha 1fd135d8fcb6)
- Data as of 2026-08-30T08:39:29.467469+00:00.