Repo brief: k3d-io/k3d

Generated by RepoPilot · document generated 2026-09-17 · concise human review Evidence snapshot · analyzed 2026-09-17T04:07:59.096Z · commit 46f3480daa74

Verdict

Healthy — Healthy across all four use cases

• Last commit 2d ago
• 22+ active contributors
• Distributed ownership (top contributor 32% of recent commits)
• MIT licensed
• 2 more receipts on the live page

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against dependency CVEs from deps.dev and OpenSSF Scorecard

What it is

k3d is a Docker-based launcher for k3s (Rancher's lightweight Kubernetes distribution), enabling multi-node Kubernetes clusters to run as containers on a single machine. It wraps k3s in containerization, allowing developers to spin up, test, and destroy full Kubernetes clusters without VM overhead or complex setup. Modular Go monorepo organized by concern: pkg/client/ handles cluster, node, registry, kubeconfig, and port management; pkg/config/ manages configuration parsing, versioning, and schema validation (with JSON schema definitions and migrations); pkg/actions/ implements cluster lifecycle hooks. The project uses versioned config types (pkg/config/v1alpha2–v1alpha4) with explicit…

Start here

Open these first:

• pkg/client/cluster.go — Core cluster lifecycle management (create, delete, start, stop) that orchestrates all other client operations.
• pkg/runtimes/docker/docker.go — Docker runtime abstraction layer that translates k3d operations into Docker API calls; primary infrastructure interface.
• pkg/config/config.go — Configuration parsing and validation engine that loads cluster definitions from YAML and manages schema versions.
• pkg/types/types.go — Core domain types (ClusterConfig, Node, Registry) that define the entire object model and contracts between packages.
• pkg/client/node.go — Node-level operations (add, remove, modify) that manage individual Kubernetes nodes within clusters.

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

Verify setup steps in the official repository manifest and documentation before running commands; the snippet does not provide executable setup instructions. Standard Go project setup would typically involve: `git clone…

Daily commands:

Evidence insufficient. Infer from Makefile presence and Go structure: likely make build or go build ./cmd/k3d. Verify actual dev/test commands in the Makefile (10,703 bytes, visible in file structure) and go.mod bef…

…shortened for this brief.

Key cautions & unknowns

• (1) Config version migration required: Cluster configs from older k3d versions must be migrated via migrate.go; users on old versions upgrading to v5.x may face incompatibilities if migrations are incomplete. (2)…
• Exact package version, compatibility, provenance, and deployment context still need project-specific review.

Sources

• Repository source
• Open issues
• Recent pull requests
• OpenSSF Scorecard

Evidence note

Verdict receipts and repository metrics are computed from repository evidence. Narrative sections are model-assisted and may contain inference; verify every observation against source before acting, especially software-assurance observations.

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