# spegel-org/spegel

Stateless cluster local OCI registry mirror.

Repository: https://github.com/spegel-org/spegel
Canonical: https://ross.abutalabs.com/products/spegel
Homepage: https://spegel.dev
Language: Go
License: MIT
License Family: permissive
Topics: containerd, docker, kubernetes, oci, p2p, registry, go, cloud, golang
Last push: 2026-08-25T11:25:38+00:00

## Health v2 (maintenance only)
Score: 96/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 93, longevity 94
- inputs: {"age_days": 1317, "days_push": 8, "days_rel": 49, "gap_med": 28.0, "n_releases_24m": 19}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3753, forks 163 (observed 2026-08-28T04:08:17.744499+00:00)

## What it is
Spegel is a stateless cluster-local OCI registry mirror for Kubernetes that lets every node share container images peer-to-peer via containerd. It reduces external registry traffic, speeds up pod startup, and keeps workloads deployable during registry outages.

## Use cases
- speed up container image pulls in a kubernetes cluster
- avoid docker hub rate limiting when pulling images
- keep pods schedulable when an external registry is down
- reduce egress traffic from pulling images
- share cached images between cluster nodes without a central registry
- improve image pull performance on edge nodes

## When to choose
- you run a multi-node Kubernetes cluster with containerd and want faster, more resilient image pulls
- you want to cut external registry bandwidth and rate-limit exposure without running a pull-through cache
- you want a stateless mirror with no extra storage to operate

## When to avoid
- your cluster uses a container runtime other than containerd
- you need strict multi-tenant image access control, since Spegel exposes every node's cache cluster-wide
- you run a local development cluster, where the project recommends Hall instead

## Facets
- artifact type: application
- maturity: active
- function: caching, container-runtime, p2p, http-server
- domain: cloud-computing, microservices
- platform: go, self-hosted
- tags: oci-registry-mirror, containerd, peer-to-peer, image-pull, daemonset, helm-chart, stateless, containers, devops, kubernetes, docker, linux

## Member repositories
- spegel-org/spegel (main) score 96

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:17.744499+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 2026-08-29T18:28:57.826267+00:00, confidence not recorded.
  - readme: https://github.com/spegel-org/spegel (fetched 2026-08-28T04:08:17.744499+00:00, sha d525d6e21b7e)
  - homepage: https://spegel.dev (fetched 2026-08-29T09:23:08.085926+00:00, sha c8e77cf35263)
  - site_page: https://spegel.dev/docs (fetched 2026-08-29T09:23:08.088747+00:00, sha 7aea5130626a)
  - site_page: https://spegel.dev/docs/getting-started (fetched 2026-08-29T09:23:08.090675+00:00, sha 5a8fe0299067)
  - site_page: https://spegel.dev/docs/usage (fetched 2026-08-29T09:23:08.093232+00:00, sha 6ad42e41451b)
  - site_page: https://spegel.dev/docs/usage/resolving-tags (fetched 2026-08-29T09:23:08.094839+00:00, sha 60fcd03d3503)
  - site_page: https://spegel.dev/docs/usage/node-configuration (fetched 2026-08-29T09:23:08.096625+00:00, sha f4ba489d8007)
  - site_page: https://spegel.dev/docs/usage/multi-tenant-credentials (fetched 2026-08-29T09:23:08.098405+00:00, sha 2039e397905f)
  - site_page: https://spegel.dev/docs/usage/local-cluster (fetched 2026-08-29T09:23:08.100151+00:00, sha 36c0173ca8ca)
  - site_page: https://spegel.dev/docs/architecture (fetched 2026-08-29T09:23:08.101704+00:00, sha 7c1e07a01c21)
- Data as of 2026-08-30T08:39:29.467469+00:00.