# krustlet/krustlet

Kubernetes Rust Kubelet

Repository: https://github.com/krustlet/krustlet
Canonical: https://ross.abutalabs.com/products/krustlet
Homepage: https://krustlet.dev
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: rust, kubernetes-kubelet, kubernetes, kubelet, wasm, wasi, krustlet, wascc
Last push: 2023-10-02T18:41:06+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2459, "days_push": 1066, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3601, forks 220 (observed 2026-08-28T04:08:11.443492+00:00)

## What it is
Krustlet is a Kubernetes kubelet written in Rust that runs WebAssembly (WASI) workloads instead of containers, using a wasmtime-based runtime. It listens on the Kubernetes event stream for pods assigned via tolerations and schedules wasm32-wasi workloads onto the node.

## Use cases
- run webassembly workloads in a kubernetes cluster
- schedule wasm pods on a kubernetes node without containers
- build a custom kubelet in rust
- run wasi applications with wasmtime on kubernetes
- extend kubernetes to support wasm32-wasi workloads

## When to choose
- you want to run WASI workloads on Kubernetes nodes instead of container images
- you need a reference implementation for writing a custom kubelet in Rust
- you are experimenting with WebAssembly in Kubernetes

## When to avoid
- you need an actively maintained project - maintainers have moved on and it is no longer maintained
- you need production-grade container workload support
- you want a supported way to run wasm on Kubernetes today - consider newer alternatives like spinKube or wasmCloud

## Facets
- artifact type: application
- maturity: abandoned
- function: container-orchestration, wasm, deployment
- domain: cloud-computing, web-development
- platform: rust, cloud
- tags: kubelet, wasm32-wasi, wasmtime, wascc, kubernetes-node, custom-kubelet, containers, devops, linux, macos, kubernetes

## Member repositories
- krustlet/krustlet (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:11.443492+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 2026-08-29T18:33:44.787095+00:00, confidence not recorded.
  - readme: https://github.com/krustlet/krustlet (fetched 2026-08-28T04:08:11.443492+00:00, sha dc08cff3eeab)
  - homepage: https://krustlet.dev (fetched 2026-08-29T09:27:00.253867+00:00, sha 9c488e6aaa5d)
  - site_page: https://docs.krustlet.dev (fetched 2026-08-29T09:27:00.262884+00:00, sha f497285cc379)
- Data as of 2026-08-30T08:39:29.467469+00:00.