Date: December 22, 2025 Codebase: k8s.io/kubernetes (master branch) Commit: 9720186a466cc627b0417433fb1f66cd1dd96f94 Vendor Size: 68 MB (4,349 Go files across 1,215 directories)

This document analyzes the fix in commit 3f18853e5 on the fix-missing-blobs branch that addresses a critical bug where containerd fails to fetch compressed layer blobs when pulling images that share uncompressed layers with previously pulled images.

Related Issues:

• moby/moby#49473: Docker save with containerd snapshotter returns incomplete OCI images
• containerd/containerd#8973: Pull with unpack doesn't fetch layer contents when snapshot exists
• kubernetes/kubernetes#135652: KIND CI failures due to missing blobs

A comprehensive guide for new contributors to the Cloud Native Computing Foundation (CNCF) ecosystem, compiled from real community conversations in the #cncf-new-contributors Slack channel spanning from November 2023 to December 2025.

This document represents the collective wisdom of hundreds of community interactions, distilled into actionable guidance for anyone looking to begin their journey in the cloud native open source world.

Some helpful commands

limactl start ./ubuntu2404.yaml

limactl list

limactl shell ubuntu2404

limactl stop ubuntu2404

Date: 2025-12-22 Scope: All staging modules in staging/src/k8s.io/ Commit: c255acea91f541a6f57a57fb6a6a400506ca2456

Consolidated & Authoritative Reference Last Updated: November 18, 2025 Branch: add-support-for-postgres Version: 3.0 (Consolidated from multiple sources)

Author: Davanum Srinivas Date: Thu Nov 6 21:17:20 2025 Message: "refactoring mongodb specific code into store-client-sdk"

Impact: 134 files changed, 15,277 insertions(+), 3,875 deletions(-)

Author: Davanum Srinivas
Date: November 6, 2025
Scope: 134 files changed, 15,277 insertions(+), 3,875 deletions(-)
Impact: 19,152 total lines changed

1. Introduction
2. Core Architecture
3. Plugin Types Overview
4. Quick Start Guide
5. Problem Daemon Plugins
   • System Log Monitor

• Custom Plugin Monitor