resource-control/data/capability/platform-audit-storage.json

{
  "schema_version": "0.1",
  "record_scope": "operational",
  "canon": {
    "model": "ITC-CAP",
    "model_version": "0.4.0",
    "canon_version": "0.6.0",
    "status": "draft",
    "catalog": "info-tech-canon/infospace/models/capability/capabilities.yaml",
    "evidence_basis_catalog": "info-tech-canon/infospace/models/governance/evidence-basis.yaml"
  },
  "record_id": "capability-case:platform-audit-storage:2026-08",
  "created_at": "2026-08-15T00:00:00Z",
  "subject": "PostgreSQL backup for rapp-postgres/platform-pg, restated in canon terms",
  "note": "Real provisioned resource. Every value carries an evidence basis; a derived value is only as strong as its weakest input.",
  "requires": [
    {
      "consumer": "rapp-postgres/platform-pg",
      "capability": "data.backup",
      "profile": "database",
      "minimum_maturity": "D5",
      "targets": {
        "rpo": {
          "value": 5,
          "unit": "minutes"
        },
        "rto": {
          "value": 60,
          "unit": "minutes"
        },
        "retention": {
          "value": 30,
          "unit": "days"
        }
      },
      "constraints": [
        {
          "dimension": "geographical_separation",
          "predicate": "not_in",
          "of": [
            {
              "kind": "host",
              "id": "railiance01"
            },
            {
              "kind": "provider",
              "id": "host-europe"
            }
          ]
        }
      ],
      "requirement_note": "The constraint is the one that decided the procurement: the backup must not share a failure domain with the host it protects. Before ITC-CAP 0.2.0 this lived only in prose."
    }
  ],
  "provisions": [
    {
      "provider": "resource:platform:audit-storage",
      "capability": "data.object",
      "environment": "production",
      "maturity": "D4",
      "implements": "Scaleway Standard Multi-AZ object storage, nl-ams",
      "resource_ref": "data/resources/platform-audit-storage.json",
      "maturity_rationale": "Approved for production dependency and in production use since 2026-08-14. Not D5: object-integrity testing is inherited from the backup restore drill rather than measured on this provision.",
      "consumes": [
        {
          "class": "S",
          "name": "stored objects",
          "quantity": {
            "value": 0.0066,
            "unit": "GB"
          },
          "period": "month",
          "basis": "measured",
          "evidence": "docs/evidence/RESOURCE-WP-0002-T05-restore-2026-08-14.json#archive",
          "observed_at": "2026-08-14",
          "measurement_note": "8 objects, 6 604 031 B in prefix platform-pg/, four hours after commissioning"
        },
        {
          "class": "N",
          "name": "restore egress",
          "quantity": {
            "value": null,
            "unit": "GB"
          },
          "period": "month",
          "basis": "unknown",
          "gap": "two scratch restores read from the bucket but bytes transferred were not recorded (owner: resource-control, add to the next drill)"
        },
        {
          "class": "P",
          "name": "object-store service",
          "quantity": {
            "value": 1,
            "unit": "unit"
          },
          "period": "month",
          "supply": "external",
          "basis": "quoted",
          "evidence": "data/providers/object-storage.json#scaleway-standard-multi-az",
          "measurement_note": "Published list price; no account quote and no invoice yet"
        },
        {
          "class": "H",
          "name": "object-store operation",
          "quantity": {
            "value": 1.0,
            "unit": "hour"
          },
          "period": "month",
          "supply": "internal",
          "basis": "assumed",
          "evidence": "data/providers/object-storage.json#scaleway-standard-multi-az.operator_hours_per_month",
          "measurement_note": "A planning allowance chosen at model time, not an observed or recorded figure"
        },
        {
          "class": "I",
          "name": "intelligence",
          "quantity": {
            "value": null,
            "unit": "token"
          },
          "period": "month",
          "basis": "unknown",
          "gap": "resource-control does not yet meter token consumption against a provision (owner: resource-control)"
        }
      ]
    },
    {
      "provider": "rapp-postgres/platform-pg CNPG barmanObjectStore",
      "capability": "data.backup",
      "profile": "database",
      "environment": "production",
      "maturity": "D4",
      "implements": "CloudNativePG 1.25 / Barman, PostgreSQL 16.10",
      "maturity_rationale": "D4 and not D5. The requirement asks for D5 (reliability measured and actively controlled). Thresholds are declared in data/thresholds/platform-audit-storage.json, but the evidence behind them is one backup, one full restore, one PITR, and about four hours of operation. wal_archive_gap_minutes is declared and not yet emitted. Reliability is therefore claimed and not yet substantiated. The requirement is not met; the gap is stated rather than the maturity inflated.",
      "evidence": [
        {
          "hook": "successful_backup",
          "basis": "measured",
          "value": "platform-pg-daily-20260814181421 completed in 48 s, method barmanObjectStore, verified",
          "observed_at": "2026-08-14",
          "ref": "docs/evidence/RESOURCE-WP-0002-T05-restore-2026-08-14.json#first_backup"
        },
        {
          "hook": "successful_restore_test",
          "basis": "measured",
          "value": "full restore to scratch cluster in 65 s; audit_core.events 30 = 30; PITR to a corrected target in 65 s with keep marker present and destroy absent",
          "observed_at": "2026-08-14",
          "ref": "docs/evidence/RESOURCE-WP-0002-T05-restore-2026-08-14.json#full_restore,pitr"
        },
        {
          "hook": "measured_rpo",
          "basis": "measured",
          "value": "WAL segment archived about 2 s after pg_switch_wal, against a 5-minute archive_timeout",
          "observed_at": "2026-08-14",
          "ref": "docs/evidence/RESOURCE-WP-0002-T05-restore-2026-08-14.json#rpo_notes",
          "caveat": "A single observation, not a distribution. The target is met on the evidence available."
        },
        {
          "hook": "measured_rto",
          "basis": "measured",
          "value": "65 s full-restore RTO, 65 s PITR RTO, on 636 MB of PGDATA",
          "observed_at": "2026-08-14",
          "ref": "docs/evidence/RESOURCE-WP-0002-T05-restore-2026-08-14.json"
        }
      ],
      "consumes": [
        {
          "class": "H",
          "name": "backup operation",
          "quantity": {
            "value": null,
            "unit": "hour"
          },
          "period": "month",
          "supply": "internal",
          "basis": "unknown",
          "gap": "real operator time was spent on procurement, credential custody, and two restore drills in this period, but no time record was kept (owner: resource-control)"
        },
        {
          "class": "I",
          "name": "intelligence",
          "quantity": {
            "value": null,
            "unit": "token"
          },
          "period": "month",
          "basis": "unknown",
          "gap": "not yet metered (owner: resource-control)"
        }
      ],
      "uses_provisions": [
        {
          "capability": "data.object",
          "provider": "resource:platform:audit-storage",
          "relation": "depends_on",
          "note": "data.backup depends_on data.object in the catalog; this names which provision satisfies it."
        },
        {
          "capability": "security.secrets",
          "provider": "OpenBao / external-secrets on reef-railiance",
          "relation": "may_use",
          "note": "ClusterSecretStore openbao-backup-object-storage; ExternalSecret synced to databases/platform-pg-backup-s3. Not a consumption row: no purchased platform capacity is bought here, another capability is used.",
          "evidence_basis": "measured",
          "observed_at": "2026-08-14"
        }
      ]
    }
  ],
  "modelled_alternatives": {
    "note": "The provider comparison that produced the decision, graded by evidence basis. The euro figures look precise and are not evidenced: they are derived from quoted list prices, projected demand, and an assumed labour rate.",
    "review_period": "2026-08",
    "values": [
      {
        "name": "scaleway.infrastructure_eur_month",
        "value": 7.35,
        "basis": "derived",
        "derived_from": [
          {
            "name": "scaleway.storage_eur_per_gb_month",
            "value": 0.01606,
            "basis": "quoted",
            "evidence": "data/providers/object-storage.json#scaleway-standard-multi-az"
          },
          {
            "name": "stored_gb.month12",
            "value": 457.968,
            "basis": "projected",
            "evidence": "data/demand/platform-audit-storage.json base scenario, month 12"
          }
        ]
      },
      {
        "name": "scaleway.labour_eur_month",
        "value": 60.0,
        "basis": "derived",
        "derived_from": [
          {
            "name": "scaleway.operator_hours_per_month",
            "value": 1.0,
            "basis": "assumed",
            "evidence": "data/providers/object-storage.json#scaleway-standard-multi-az"
          },
          {
            "name": "operator_hourly_eur",
            "value": 60,
            "basis": "assumed",
            "evidence": "data/demand/platform-audit-storage.json scenarios[*].operator_hourly_eur"
          }
        ]
      },
      {
        "name": "hetzner.infrastructure_eur_month",
        "value": 6.49,
        "basis": "quoted",
        "evidence": "data/providers/object-storage.json#hetzner-object-storage monthly_minimum_eur"
      },
      {
        "name": "hetzner.labour_eur_month",
        "value": 90.0,
        "basis": "derived",
        "derived_from": [
          {
            "name": "hetzner.operator_hours_per_month",
            "value": 1.5,
            "basis": "assumed",
            "evidence": "data/providers/object-storage.json#hetzner-object-storage"
          },
          {
            "name": "operator_hourly_eur",
            "value": 60,
            "basis": "assumed",
            "evidence": "data/demand/platform-audit-storage.json scenarios[*].operator_hourly_eur"
          }
        ]
      }
    ]
  },
  "open_items": [
    "The requirement asks for data.backup at D5; the provision is D4. Closing it needs a drill cadence, an emitted wal_archive_gap_minutes, and more than one backup.",
    "Class I consumption is unknown on both provisions. resource-control does not meter tokens against a provision yet.",
    "Class H on the data.backup provision is unknown: effort was spent and not recorded. A time record starts in 2026-09.",
    "No invoiced basis exists anywhere in this record. The first booked Scaleway cost from fin-hub (FIN-WP-0004) would be the first."
  ]
}