Docker Engine 25 rootful¶

Upstream Docker Engine 25.0.5 static payload on maintained Alpine, rootful daemon

Image: ghcr.io/strukturpiloten/docker-25-rootful
Declared image version: v25.0.5
Family: Docker Engine
Architecture: amd64, arm64
Inner mode: rootful

Declared runtime base: docker.io/library/alpine:3.24@sha256:294b683cb724975bec92580e1e685676bd4b50bda910ddb8c51d4cabeaec77e6

Image source and metadata · GHCR package · Detailed guide

Choose and inspect¶

Declared upstream software: 25.0.5

Declared tags: v25.0.5, v25.0, v25, main, latest. These are publication policy aliases, not proof that any tag exists in GHCR. Even the exact SemVer tag can move after a reviewed rebuild.

Registry status: observed; checked at 2026-09-28T10:15:40.909298+00:00.

Observed latest index digest: sha256:832b07eb78a996802e2ef790f71deae02f856bb6d24ba8ea0b755662ab98cd48.

Pull the observed immutable artifact:

podman pull ghcr.io/strukturpiloten/docker-25-rootful@sha256:832b07eb78a996802e2ef790f71deae02f856bb6d24ba8ea0b755662ab98cd48

For an isolated Linux nested-Docker test, the outer Podman boundary runs rootfully and privileged. Use a trusted runner and keep its image store separate from other tests:

sudo podman run --rm --detach --name nested-docker --privileged --device /dev/fuse --security-opt label=disable ghcr.io/strukturpiloten/docker-25-rootful@sha256:832b07eb78a996802e2ef790f71deae02f856bb6d24ba8ea0b755662ab98cd48
ready=0
for attempt in $(seq 1 30); do
  if sudo podman exec nested-docker docker info >/dev/null 2>&1; then ready=1; break; fi
  sleep 2
done
if [ "$ready" -eq 1 ]; then sudo podman exec nested-docker docker info; else sudo podman logs nested-docker; fi
sudo podman stop nested-docker
test "$ready" -eq 1

This fixture does not use the host Docker socket. Read the detailed guide for nested workloads.

Support and runtime contract¶

Lifecycle: legacy; admission: isolated-test; review after: 2026-10-27.

Pinned static Engine and bundled dependencies are not patched by Alpine OS rebuilds; isolated compatibility fixture only.

Declared runtime profiles: docker. Declared test settings are in the metadata source. Admission is policy, not evidence of a passed test.

Declared runtime test contract:

{
  "docker": {
    "mode": "rootful",
    "nestedRuntime": true,
    "outerPrivilege": "privileged"
  }
}

Registry aliases and history¶

Aliases resolved to the observed current digest: latest, main, v25, v25.0, v25.0.5.

Listed without digest resolution: run-36338188065-1-sha-237848af5481e58c6b0fec3ee0944d644eb59867, run-36346260768-1-sha-0b136a13a8bb612d91960ae5d07e72f449c89ec1, sha-0b136a13a8bb612d91960ae5d07e72f449c89ec1, sha-237848af5481e58c6b0fec3ee0944d644eb59867, sha256-02d3dbd987017ea4bcd48f149b96968cfee8af0462cad962f30db2d28afe67d0, sha256-23e81e247bbd77e2702eedcc2a0af244fe8073bc967977f798ffa8ef3b56d896, sha256-35c34926b1f511a2d2e1f48f61e41e52e81f86ff098febb0335a97fc7ce58169, sha256-46f6ad8f636740329d5425384fca73ea60b2c23d1eaa2c968e7299c08b5cc2e2, sha256-75d9fadea8dbc4533a2116a97999e2f4e58a48a84695b92a997483058d9a33f5, sha256-832b07eb78a996802e2ef790f71deae02f856bb6d24ba8ea0b755662ab98cd48.

Evidence and timestamps¶

Matching release asset verified the build record and per-architecture runtime and scan evidence. Signature and provenance remain unverified in this snapshot.

Maintenance release · Evidence asset

GitHub package activity can include signatures and attestations; it does not identify when the current runnable image was published. A registry observation is a point-in-time check; mutable tags may move afterward. Use the immutable digest and maintenance evidence for an audit.