Tag: #containerd

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• A Three-Line Config File Killed Four GPUs for a Week — How containerd Drop-in Merging Really Works

  The nodes stopped advertising GPUs. The nvidia runtime was written out cleanly in the config file, but it was nowhere to be found in containerd config dump. The culprit was a three-line registry config I had added a week

  2026-08-26 · 12 min read #kubernetes#containerd#gpu#nvidia#troubleshooting

• The Complete Guide to Installing k3s in an Air-Gapped Network — From Image Tarball Transfer to a Private Registry and Agent Joins

  Covers the whole process of standing up a k3s cluster on a network with no internet path at all, command by command. It walks through downloading the airgap image tarball and the k3s binary on a connected machine, buildi

  2026-07-31 · 20 min read #kubernetes#k3s#air-gap#on-premise#containerd

• Kubernetes ImagePullBackOff and ErrImagePull Fully Dissected — Ending It With One Cause String

  Breaks down, cause by cause, the situation where a pod passes through ErrImagePull and then sits in ImagePullBackOff. It starts from two points: that the two states are different stages of the same event, and that the an

  2026-07-26 · 12 min read #kubernetes#imagepullbackoff#container-registry#troubleshooting#containerd

• EROFS Native Layers in containerd 2.3 — What You Get in Exchange for Removing Unpack

  containerd 2.3, released on April 30, 2026, opened a path to pull an EROFS filesystem image straight from the registry and mount it as-is. Since there's no tar to unpack, the entire unpack step disappears, leaving behind

  2026-07-16 · 18 min read #container#containerd#oci#storage#linux

• Container Runtimes 2026 Deep Dive - containerd, runc, Podman, CRI-O, Kata, gVisor, Firecracker, Wasm

  A full-stack tour of production container runtimes as of May 2026. We cover containerd (de facto Kubernetes CRI), low-level OCI runtimes runc, crun, and youki, the alternative CRI CRI-O, the rootless/daemonless trio Podm

  2026-05-16 · 16 min read #container-runtime#containerd#runc#podman#cri-o

• Container Runtime Alternatives 2026 Deep Dive - containerd, CRI-O, Podman, runc, gVisor, Kata Containers, youki, WasmEdge, and Firecracker

  The container runtime landscape in 2026 is no longer Docker-centric. Kubernetes removed dockershim in 1.24, and containerd 2.0 and CRI-O 1.31 have become the cluster default. On developer workstations Podman 5 and Docker

  2026-05-16 · 18 min read #english#container-runtime#containerd#cri-o#podman

• Docker Desktop Alternatives 2026 — Podman / OrbStack / Colima / Finch / Rancher Desktop Deep-Dive Comparison

  Five years after Docker Desktops August 2021 pricing change, the container tooling landscape has been completely reshaped. In 2026, containerd is the de facto industry-standard runtime, and on top of it sit a constellati

  2026-05-15 · 22 min read #docker#podman#orbstack#colima#finch

• [containerd] Networking and Storage

  Analyzes containerd networking and storage internals. Covers CNI integration, network namespaces, volume mounts, device access (GPU), SELinux/AppArmor at the source code level.

  2026-03-20 · 19 min read #containerd#container-runtime#open-source-internals

• [containerd] Container Lifecycle Management

  Analyzes containerd container lifecycle management. Covers container creation, OCI runtime spec, Task execution, shim lifecycle, checkpoint/restore, and runtime classes (runc, kata, gVisor, Wasm) at the source code level

  2026-03-20 · 15 min read #containerd#container-runtime#open-source-internals

• [containerd] CRI Implementation: Kubernetes Runtime Integration

  Analyzes containerd CRI implementation internals. Covers CRI gRPC service, Pod Sandbox, container spec translation, streaming (exec/attach/port-forward), RuntimeClass, and NRI (Node Resource Interface) at the source code

  2026-03-20 · 18 min read #containerd#container-runtime#open-source-internals

• containerd Architecture Internals

  Analyzes the architecture of containerd, the industry-standard container runtime. Covers gRPC API, plugin system (services, snapshotter, runtime), plugin registration/initialization/dependency resolution, CRI implementat

  2026-03-20 · 3 min read #containerd#container-runtime#open-source-internals

• [containerd] Image Management: OCI Images and Snapshots

  Analyzes the internals of containerd image management. Covers OCI image spec, Content Store, Snapshotter (overlayfs, native, devmapper), image pull flow, and garbage collection at the source code level.

  2026-03-20 · 16 min read #containerd#container-runtime#open-source-internals