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openstack-caracal-dc-dc / docs / changelog-20260723-stage4-open.md
@JANeumatrix JANeumatrix 2 hours ago 5 KB D-134 AMENDED: contiguous band table (Option B swap), utterances quoted
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Changelog -- 2026-07-23 -- Stage 4 open: discovery + D-133 carve ruling

Session scope: open Stage 4 (Phase 3, MAAS enlist/commission/deploy per DC) on branch dc-dc-stage4-phase3-maas-deploy off post-merge main. Bootstrap ran clean (pull up-to-date at bff71d4; repo-lint 0 fail / 1 legacy warn; ledger-scan reconciled -- 12 open SEC rows, D next-free 133). No cloud mutation this session yet; everything below is read-only measurement + repo records.

Item 1 -- Stage 4 OPENED: precondition + discovery (read-only), captured

  • Branch dc-dc-stage4-phase3-maas-deploy created off main (bff71d4).
  • Runbook Step 0 precondition PASS: both DC rack controllers enrolled (vvr1-dc0 7chphy, vvr1-dc1 nmpcq4).
  • Step 2 discovery complete for BOTH DCs, all read-only, captured to docs/audit/stage4-discovery-20260723.txt: 9 nodes per DC, ALL Ready, power=virsh; dc0 = boot fabric-4 / MACs 52:54:00:, dc1 = fabric-142 / pinned 52:54:01:d1:; zone/pool default everywhere (no zone/pool convention exists -- fabric + MAC prefix is the grouping signal). Also captured: one dc0 node's full physical NIC list (6 flat per-plane NICs), default_distro_series=noble, and the synced boot-resources list (noble ONLY -- no jammy images on the region).
  • Runbook-vs-reality deltas recorded in CURRENT-STATE (the runbook predates Stage 3's execution): Step 3 commissioning already satisfied; carve comes BEFORE deploy per the runbook's own Ready-state sequencing note; gap #6 (pod-discovery landing status) is moot -- the pod path was refuted 2026-07-20.
  • Revert: git branch -D dc-dc-stage4-phase3-maas-deploy (after moving off it); delete docs/audit/stage4-discovery-20260723.txt; revert the CURRENT-STATE Stage-4 bullet. No live state was touched.

Item 2 -- D-133 ADOPTED: flat per-NIC carve (VR1); hardware-faithful NIC topology next deployment

  • New entry docs/design-decisions.md D-133 [ARCH], Status ADOPTED 2026-07-23, operator utterance quoted verbatim per GA-R5 ("Fine, keep it flat but on the next deployment we need to build the VMs with exact hardware duplicated networking so we can work out any bonding/trunking kinks.").
  • Part 1: VR1 DC nodes carve every plane FLAT on its dedicated NIC; no VLAN-103 stack in VR1 (supersedes the D-052-era Pattern A shape for VR1 DC nodes only; VR0 untouched).
  • Part 2 (pinned to next deployment): node VMs duplicate target hardware's exact NIC topology (bond members, trunks) -- composes with D-132.
  • Affected-surfaces list recorded IN the entry (buildout-design VID-103 text, workflow Stage 4 row, phase3 runbook Step 5 tree, lib-net vr1-dc0 arm's inherited METAL_INTERNAL_VID) -- queued as this stage's DOCFIX/delivery work, not silently edited.
  • CURRENT-STATE section 1 updated in the same commit (GA-R1 C1): Stage 4 OPEN bullet with discovery facts + the open decision points (deploy OS series, octet plan, mirror gap #5, tag shape).
  • Revert: remove the D-133 block from design-decisions.md and the Stage-4 bullet from CURRENT-STATE.md (single commit; git revert <sha>).

Item 3 -- D-134 ADOPTED: per-role octet bands for VR1 DC node statics

  • New entry docs/design-decisions.md D-134 [ARCH], ADOPTED 2026-07-23. Sequence per GA-R5: the flat .40-.48 proposal was presented and REJECTED ("Different band"); operator directed "Per role bands with headroom. Give me a recommendation"; the recommended band table was presented with measured collision checks (bundle VIPs .50-.60 grep, 10.12.12.4, FIP pool, D-120 dynamic range) and adopted ("Adopt as recommended").
  • Bands: .1-.9 infra (.4-.9 utility-reserved), .10-.19 control, .20-.49 compute, .50-.99 formal VIP band, .100-.200 dynamic (D-120), .201-.254 storage. One octet per node across all six planes, both DCs; VR1 assignments control .10-.12 / compute .20-.21 / storage .201-.204 keyed by tofu node name via pinned boot MAC.
  • CURRENT-STATE Stage-4 bullet updated in the same commit (octet plan RULED; carve now unblocked on D-133 + D-134).
  • Revert: remove the D-134 block + the CURRENT-STATE bullet edit (git revert <sha>).

Item 4 -- D-134 AMENDED: contiguous band table (Option B swap)

  • Operator rejected the original table's interleaving (node roles split by the VIP + dynamic blocks); movability analysis presented (pinned: .1/.2/.3 live, .50-.60 bundle VIPs, FIP rows 1-3 on provider; movable: the D-120-inherited dynamic range). Option B ruled: nodes get the contiguous .100-.200 run (control .100-.119 / compute .120-.149 / storage .150-.200), dynamic moves to .201-.254, utility .4-.49, VIP .50-.99.
  • VR1 assignments now: control .100-.102, compute .120-.121, storage .150-.153 (identity table unchanged -- tofu name via pinned boot MAC).
  • Consequence queued: the dc0/dc1 metal-admin dynamic-range MOVE is the carve's first gated live mutation per DC (before static assignment; nodes powered off). Office1's own D-120 ranges untouched.
  • CURRENT-STATE Stage-4 bullet updated same-commit.
  • Revert: remove the amendment block + CURRENT-STATE edit (git revert <sha>); no live state touched yet.