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docs(rfc): rootless-Docker spike — analysis + validation plan (#1176) - #373
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…nary go/no-go (#1176) Deliverable for the rootless-primary spike: kernel-prerequisite coverage by distro, rootless install mechanics (subuid/subgid + systemd --user), k3d-on- rootless-socket caveats (cgroup delegation), the fuse-overlayfs push-perf risk, a concrete validation plan for real hosts (incl. a hardened/userns-disabled node to exercise the Tier-2 fall-through), and a provisional GO conditioned on those experiments. The §5 experiments need real target hosts and gate #1177 (Tier 1); nothing here blocks #1172 (routing) or #1175 (Tier 0). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
divyasinghds
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Jul 23, 2026
divyasinghds
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Approve (doc). Honest, well-scoped spike. Note: the §5 validation experiments (fuse-overlayfs push perf, k3s cgroup delegation under systemd --user, HPC no-user-systemd) remain a gate on #1177 itself — please track them there.
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LukasWodka
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Jul 25, 2026
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Functional review \u2014 passed\n\nThis PR is documentation only (an RFC write-up plus its validation plan) \u2014 there is no runtime behaviour on dev to exercise, so functional review on the dev environment is not applicable. passed at merge. Advancing on that basis. |
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What
The spike deliverable for the rootless-Docker-primary decision (Asad's review of RFC 0001). A design + analysis doc plus the validation plan that gates Tier 1 (#1177):
dockerd-rootless-setuptool.sh, the subuid/subgid precondition (the one residual named privileged touch), systemd --user + a nohup fallback for HPC nodes.push(dataset-copy) path, with a measurement plan.Note
The §5 experiments require real target hosts / CI runners — they can't run from a dev laptop, so this doc is analysis + plan + preliminary verdict, not the executed measurements. It gates #1177 (Tier 1); it does not block #1172 (routing) or #1175 (Tier 0).
Part of the least-privilege install epic (#1168). Part of tracebloc/backend#1176 (leaves the ticket open for the real-host experiments).
🤖 Generated with Claude Code
Note
Low Risk
Documentation-only; no runtime, auth, or data-path code changes.
Overview
Adds
docs/rfcs/0001-rootless-spike.md, the spike deliverable for using rootless Docker as the k3d backend under the least-privilege install RFC. It frames what must hold before Tier 1 (#1177) ships: kernel probes (cgroup v2 + unprivileged userns), distro tier expectations, rootless install mechanics (subuid/subgid, systemd --user / HPC fallback), and k3d-specific checks (cgroup delegation, networking, ports).The doc calls out fuse-overlayfs vs native overlay as the main UX risk for dataset
push/ingest, defines a §5 real-host experiment matrix (probe accuracy through Tier-2 fall-through on hardened nodes), and records a provisional GO with three blocking unknowns for #1177. It explicitly does not block routing (#1172) or Tier 0 (#1175).Reviewed by Cursor Bugbot for commit 8560f56. Bugbot is set up for automated code reviews on this repo. Configure here.