jakman85andClaude Opus 5 666a60776a fix(flux): close the substitution race — platform dependsOn root + strict substitution (P0/P1)
P0 — clusters/base/platform.yaml gains `dependsOn: [flux-system]`. This is the actual fix
for the incident, not the feature gate. Verified against kustomize-controller v1.4.0
`kustomization_controller.go :: checkDependencies` (our version): dependsOn is REVISION-
gated, not merely Ready-gated — when the dependency shares a GitRepository, the dependent
cannot reconcile revision N until the dependency has APPLIED revision N. Applying revision
N is exactly what writes a newly-added cluster-vars knob.

Graph verified mechanically, not by eye: built clusters/dev and clusters/prod and walked
the resulting objects. `platform` was the ONLY Kustomization without a dependsOn, and all
11 substituting Kustomizations chain transitively through it (platform-config -> platform;
the waves, apps-vms, oauth2-proxy, headlamp, homepage, crafty, velero -> platform-config).
The "not chaining through platform" set is EMPTY, so this one edge protects the whole
graph. DFS over the full edge set after the edit: no cycles. The root (clusters/dev/
sync.yaml) runs wait: false, which is what makes the edge deadlock-free — it reaches Ready
on apply success without health-gating its children.

Accepted trade-off, documented in-file: the root becomes a gate. A malformed manifest
anywhere under clusters/<env> — including clusters/base — now stalls platform and
everything downstream, where today it would not. Fail-closed, per doctrine.

P1 — StrictPostBuildSubstitutions. MY PREMISE WAS WRONG about where this belongs and it
matters: this repo deliberately does NOT use `flux bootstrap` (see bootstrap/flux/README).
There is no gotk-components.yaml in git, and the live kustomize-controller Deployment
carries NO Flux ownership labels — it was installed imperatively by `flux install` from
bootstrap.sh and is not in Flux's inventory. `flux-system` self-manages the CR graph, NOT
the controllers. Nothing under clusters/** can reach a controller flag.

So it uses Flux's documented mechanism for hand-installed clusters: a new
bootstrap/flux/components/kustomization.yaml wrapping `gotk-components.yaml` with a
JSON-6902 patch appending --feature-gates=StrictPostBuildSubstitutions=true to
kustomize-controller. JSON-6902 `add /args/-` deliberately, NOT strategic merge — a
container's args is atomic and a merge patch would replace all five install-generated
args. bootstrap.sh step 1 now renders (`flux install --export` into a temp dir, apply the
patch, ASSERT the gate string is present so a future Flux bump that breaks the patch
target fails loudly) then applies. FLUX_INSTALL_PLAIN=1 is a loud escape hatch. Nothing is
vendored, so components can never drift from the pinned FLUX_VERSION.

Rejected: vendoring gotk-components.yaml under the root's path (the root's prune: true
would put Flux's own controllers and CRDs in a prune inventory), and shipping a partial
Deployment as a Flux-managed resource (a future prune would delete kustomize-controller).

ROLLOUT ORDER MATTERS. P0 arrives automatically on the next reconcile. P1 does NOT arrive
on a git push — the controller Deployment is outside Flux's inventory, so an operator must
re-run bootstrap.sh step 1, which restarts kustomize-controller (~10-20s; Flux is
level-triggered so an interrupted reconcile is simply retried). P0 must be reconciled
BEFORE P1 is rolled out: with the gate on but the ordering edge absent, the same race
turns a transient empty render into a transient hard Kustomization failure.

ALSO FIXES A PHASE-7 BLOCKER THIS CHANGE WOULD OTHERWISE HAVE CREATED. clusters/prod had
no root Kustomization — dev/sync.yaml even carried the note "a prod overlay needs its own
sync.yaml -> ./clusters/prod". With the new dependsOn, a prod bootstrap would have left
platform blocked forever on a flux-system Kustomization that does not exist, and nothing
downstream would ever reconcile. clusters/prod/sync.yaml is now authored, mirroring dev.

Two further prod-overlay gaps found and DOCUMENTED, not guessed (PROD-PROVISIONING §7):
prod has no SOPS `decryption` patch (every encrypted Secret would fail to decrypt — needs
the prod age-key decision, a security choice not a copy), and no GitRepository source URL
patch (needs a decision on whether prod tracks the same branch as dev, which would make a
dev-facing merge reconcile prod).

Substitution gate re-run: check OK, 102 assertions, 0 hazards. Gate: MERGE GATE: PASS.

Serves: R-ENV-02, R-GITOPS-01, R-PLAT-01, R-ENV-03.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
2026-09-01 01:45:04 -05:00

home-network-k3s-impl

Implementation of the home k3s + Longhorn platform. This repo holds the reconciled artifacts (Flux config, Kustomize overlays, KubeVirt/Helm manifests, ServiceDefinitions, Kyverno policies, Chainsaw conformance tests, CI). It is driven by — and subordinate to — the read-only specification at ../home-network-k3s.

Rules (from the spec — non-negotiable)

  • The spec is read-only. Never modify anything under ../home-network-k3s. Implement against it; escalate spec problems, don't edit them (spec AGENTS.md §11, R-TEST-06).
  • Done = a green, reproducible, requirement-tagged conformance test — never "merged," never a manual demo (spec docs/14, agents/definition-of-done.md).
  • No work on main. Every change is a feature branch merged into main (spec CONTRIBUTING.md).
  • No plaintext secrets — SOPS-encrypted only (spec docs/07).
  • Phase discipline — only build what the active roadmap phase authorizes (spec roadmap/phases.md).

Layout

infra/          node provisioning: OpenTofu (Proxmox VE) + cloud-init + Ansible, and the
                pinned dev container that carries the whole toolchain
bootstrap/      one-time cluster bootstrap: Flux install, SOPS/age key, host Gitea
platform/       platform CONTROLLERS (Flux HelmReleases / operator bases): kyverno, cilium,
                longhorn, external-snapshotter, cert-manager, externaldns, gateway, coredns,
                vpn-egress, monitoring, cnpg, keycloak, oauth2-proxy, kubevirt
platform-config/ platform CONFIGS — the custom resources of the CRDs installed above
                (ClusterIssuers, Gateway, Kyverno policies, KubeVirt/CDI CRs, Keycloak CRs).
                Split out because CRs and the CRDs they use cannot apply in one pass.
apps/           application tier, reconciled as dependency-ordered WAVES:
                  wave-0/ wave-1/ wave-2/   rendered container apps (see DESIGN-waves.md)
                  vms/                      KubeVirt VirtualMachines (non-gating tier)
catalog/        ServiceDefinition entries (the onboarding surface) + render.py
schemas/        ServiceDefinition JSON Schema + renderer contract
clusters/       Flux entrypoints + dev/ and prod/ overlays
conformance/    Chainsaw behavior/conformance suite + harness + coverage report
ci/             the gate as scripts (lint · schema · Kyverno L0 · L1 render · decision)
.gitea/         Gitea Actions CI running that gate on an in-cluster runner

Status

Roadmap phases 0–6 are delivered and deployed on the dev cluster; Phase 7 (prod) is not open — clusters/prod is a design-only overlay.

Phase Delivered
0 Foundations ServiceDefinition schema + renderer, Kyverno L0 gate, conformance harness, CI
1 Cluster bring-up 3-node k3s HA on Proxmox VE (192.168.1.50/.51/.52), Cilium, Flux, SOPS
2 Platform core Cilium · Longhorn · cert-manager (LE-prod wildcard) · ExternalDNS · Gateway API · split-horizon CoreDNS
3 Egress / VPN ADR-0015 node-level OpenVPN split-tunnel + Cilium egress-gateway steering + host kill-switch
4 Observability kube-prometheus-stack · Loki · Alloy · Alertmanager. Velero still blocked on OQ-BKP; image-automation authored but disabled
5 IaaS KubeVirt + CDI on real nested KVM; live-migratable RWX VM storage. The UniFi VM runs, but UniFi OS Server is not yet installed in the guest
6 Identity + CI Keycloak (Operator + CNPG) · oauth2-proxy forward-auth · Grafana OIDC · kubectl OIDC SSO with group→RBAC · in-cluster Gitea Actions merge gate

Conformance: 36 / 51 requirements covered (70.6%), 15 gaps, 1 safety-critical gap (R-STATE-02, Longhorn node-loss). Regenerate with ./conformance/run.sh --coverage-only; the full report is conformance/_artifacts/coverage/coverage.md.

The running narrative — decisions, root causes, incidents, follow-ups — is DECISIONS-LOG.md. It, not this table, is the authoritative record.

Working on this repo

Everything the gate needs is baked into the pinned dev container — do not install the toolchain on the host:

infra/devcontainer/dev.sh build            # once
infra/devcontainer/dev.sh run make -C ci gate   # the same gate CI runs
infra/devcontainer/dev.sh                  # interactive shell (sops, flux, kubectl, tofu, ansible)

The container mounts the repo at /work, your age keyring, and the sibling spec repo read-only so the spec-immutability check can actually run. See infra/devcontainer/README.md.

A green run prints MERGE GATE: PASS. The L2/L3 conformance layers stay SKIPPED unless CLUSTER_AVAILABLE=true — the static gate never pretends to have run them.

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