openova/docs/BLUEPRINT-AUTHORING.md

Blueprint Authoring

Status: Authoritative target spec. Updated: 2026-04-27. Implementation: The Blueprint CRD, blueprint-controller, and CI fan-out described below are design-stage. See IMPLEMENTATION-STATUS.md. Today, platform/<name>/ and products/<name>/ folders contain only README.md.

How to author a Blueprint for Catalyst — the unified unit of installable software (replaces what was previously called "module" + "template"). Defer to GLOSSARY.md for terminology and ARCHITECTURE.md for the broader model.

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1. What a Blueprint is

A Blueprint is:

• A source location:
  • Public Blueprints: a directory under platform/<name>/ or products/<name>/ in the github.com/openova-io/openova monorepo (this repository). Per-Blueprint isolation is provided by CI fan-out — each folder publishes its own signed OCI artifact.
  • Org-private Blueprints: a directory inside <sovereign-domain-gitea>/<org>/shared-blueprints/bp-<name>/ in that Organization's Gitea repo on its Sovereign.
• A CRD manifest (blueprint.yaml) declaring its identity, configSchema, placementSchema, dependencies, and pointers to its manifests.
• A set of manifests (Helm chart, Kustomize base + overlays, or raw YAML) that get applied when the Blueprint is installed as an Application.
• A set of Crossplane Compositions (optional) for any non-Kubernetes resources the Blueprint provisions.
• A CI pipeline that signs the artifact (cosign), generates an SBOM (Syft), publishes to OCI registry (ghcr.io/openova-io/bp-<name>:<semver>), and tags a release.

One Blueprint = one card in the marketplace (when visibility: listed).

Why monorepo for public Blueprints: a single repository is simpler to govern, gives one consistent CI pipeline shape across all components, and avoids the per-repo overhead of permissions, settings, and dependabot config. Per-Blueprint isolation is provided at the OCI artifact layer, not the Git repo layer — ghcr.io/openova-io/bp-<name>:<semver> artifacts are independently versioned, signed, and consumed.

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2. Folder layout

A Blueprint folder lives at platform/<name>/ or products/<name>/ in the github.com/openova-io/openova monorepo. The CI pipeline at the monorepo root detects changes per folder and publishes per-Blueprint OCI artifacts.

platform/<name>/                 ← OR products/<name>/ for composite Blueprints
├── blueprint.yaml               ← the Blueprint CRD manifest
├── README.md                    ← what it does, links to docs
├── chart/                       ← Helm chart (preferred for typical apps)
│   ├── Chart.yaml
│   ├── values.yaml
│   └── templates/
│   OR
├── manifests/                   ← Kustomize base
│   ├── base/
│   │   ├── kustomization.yaml
│   │   ├── deployment.yaml
│   │   ├── service.yaml
│   │   └── ingress.yaml
│   └── overlays/
│       ├── small/
│       ├── medium/
│       └── large/
├── compositions/                ← (optional) Crossplane Compositions
│   ├── postgres-database.yaml
│   └── object-storage-bucket.yaml
├── card/                        ← marketplace presentation
│   ├── icon.svg
│   ├── screenshots/
│   └── description.md
└── tests/                       ← acceptance tests
    ├── integration.yaml         ← Litmus probe / Catalyst test harness
    └── upgrade.yaml

The CI workflow lives once at the monorepo root (.github/workflows/) and uses path-based matrix builds — every blueprint.yaml triggers its own pipeline:

# .github/workflows/blueprint-release.yaml (monorepo root, path-matrix)
on:
  push:
    tags: ['platform/*/v*', 'products/*/v*']    # tag form: platform/<name>/v1.2.3
  pull_request:
    paths: ['platform/**', 'products/**']

This shape is documented as the design contract; the workflow itself is not yet implemented (see IMPLEMENTATION-STATUS.md).

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3. The Blueprint CRD

Annotated example for bp-wordpress:

apiVersion: catalyst.openova.io/v1alpha1
kind: Blueprint
metadata:
  name: bp-wordpress
  version: 1.3.0
spec:

  card:                                # presentation in marketplace
    title: WordPress
    tagline: Self-hosted CMS
    category: cms
    tags: [cms, blog, php]
    icon: ./card/icon.svg
    screenshots:
      - ./card/screenshots/admin.png
      - ./card/screenshots/post-editor.png
    license: GPL-2.0
    documentation: https://wordpress.org/documentation

  visibility: listed                   # listed | unlisted | private

  owner:
    team: apps                         # team responsible for upkeep
    contact: apps@openova.io

  configSchema:                        # JSON Schema; drives console form
    type: object
    required: [domain, adminEmail]
    properties:
      domain:
        type: string
        format: hostname
        description: Public domain for the site
      adminEmail:
        type: string
        format: email
      title:
        type: string
        default: "My WordPress site"
      replicas:
        type: integer
        default: 2
        minimum: 1
        maximum: 20
      postgres:
        type: object
        oneOf:
          - properties:
              mode: { const: embedded }
          - properties:
              mode: { const: external }
              ref:
                type: string
                description: Name of an existing bp-postgres Application

  placementSchema:                     # supported placement modes
    modes: [single-region, active-active, active-hotstandby]
    minRegions: 1
    maxRegions: 5

  depends:                             # dependency declarations
    - blueprint: bp-postgres
      version: ^1.4
      alias: db
      when: "{{ .config.postgres.mode == 'embedded' }}"
      values:
        databases: ["{{ .application.name }}"]
        size: medium

  manifests:                           # how to materialize on install
    source:
      kind: HelmChart
      ref: oci://ghcr.io/openova-io/bp-wordpress:1.3.0
    overlays:                          # vendor sizing variants
      small:
        replicas: 1
        postgres: { mode: embedded, size: small }
        backups: { schedule: weekly }
      medium:
        replicas: 2
        postgres: { mode: embedded, size: medium }
        backups: { schedule: daily }
      large:
        replicas: 5
        postgres: { mode: external }
        backups: { schedule: daily }
        pdb: true
        hpa: true

  upgrades:                            # supported upgrade paths
    from:
      - 1.2.x                          # safe automatic
      - 1.1.x                          # requires data migration
    blocks:
      - 1.0.x                          # no path; recreate

  rotation:                            # secrets this Blueprint owns
    - kind: oauth-client-secret
      name: wp-keycloak-client
      ttl: 90d

  observability:                       # what this Blueprint emits
    metrics: prometheus
    logs: stdout
    traces: otlp

---

4. configSchema design

The console form is generated from configSchema — never hand-written. JSON Schema features supported:

• type, format, default, enum, minimum, maximum
• oneOf / anyOf for branching (e.g. embedded vs external Postgres)
• properties.x.description becomes form help text
• dependencies for conditional fields
• x-catalyst-ui-hint for non-trivial widgets:
  • password — masked input
  • domain-picker — autocomplete from existing Org domains
  • application-ref — picker over existing Apps in the Environment matching a Blueprint filter

Example with hint:

postgres:
  type: object
  properties:
    ref:
      type: string
      x-catalyst-ui-hint: application-ref
      x-catalyst-ui-filter:
        blueprint: bp-postgres
        environment: current

The console renders this as a dropdown of existing postgres Applications in the current Environment.

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5. Dependencies

5.1 Hard dependencies

depends:
  - blueprint: bp-postgres
    version: ^1.4
    alias: db

Catalyst will install bp-postgres if not already present. The Blueprint may reference its dependency by alias in its manifests:

# in chart/templates/deployment.yaml
env:
  - name: DATABASE_URL
    valueFrom:
      secretKeyRef:
        name: "{{ .Values.dependencies.db.connectionSecret }}"
        key: url

5.2 Conditional dependencies

depends:
  - blueprint: bp-postgres
    when: "{{ .config.postgres.mode == 'embedded' }}"
    alias: db

Skipped at install time if the predicate is false. Useful when the user can choose "embedded backing service" vs "use existing".

5.3 Reference dependencies

The user can choose external mode and reference an existing Application:

configSchema:
  postgres:
    oneOf:
      - properties:
          mode: { const: embedded }
      - properties:
          mode: { const: external }
          ref: { type: string }

When mode: external, the Blueprint's manifests resolve ref to a sibling Application in the same Environment, reads its connection details from the secret it exposes, and connects.

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6. Placement and multi-region

placementSchema declares which Placement modes the Blueprint supports:

placementSchema:
  modes: [single-region, active-active, active-hotstandby]
  minRegions: 1
  maxRegions: 5

For active-active, the Blueprint must be designed for it:

• Stateless services: trivial.
• Stateful: the Blueprint declares the replication strategy in its manifests (e.g. CNPG WAL streaming, MinIO bucket replication, Valkey REPLICAOF).

Catalyst's projector uses the Placement spec to fan out manifests across the right vclusters at install time.

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7. Manifests

Three accepted source types:

manifests.source.kind	When to use
HelmChart	Most third-party apps with existing Helm charts.
Kustomize	Small custom apps; full control over patches and overlays.
OAM	(Future, not yet supported) — Open Application Model definitions.

For Helm: ref points at an OCI artifact; Catalyst's Flux helm-controller fetches and renders.

For Kustomize: the Blueprint repo's manifests/base/ is the base; each overlay in manifests/overlays/<size>/ is a Kustomize component layered on top. Catalyst's Flux kustomize-controller renders.

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8. Crossplane Compositions

If the Blueprint requires non-Kubernetes resources (cloud DBs, DNS records, S3 buckets, etc.), it includes Crossplane Compositions in compositions/.

# compositions/postgres-database.yaml
apiVersion: apiextensions.crossplane.io/v1
kind: Composition
metadata:
  name: postgres-database.bp-wordpress
spec:
  compositeTypeRef:
    apiVersion: compose.openova.io/v1alpha1   # shared XRD group across Blueprints
    kind: PostgresDatabase
  resources:
    - name: hetzner-postgres-instance
      base:
        apiVersion: db.hcloud.crossplane.io/v1alpha1
        kind: PostgresInstance
        spec:
          forProvider:
            location: { from: spec.region }
            tier: { from: spec.tier }

Crossplane is never user-facing. End users see "needs a database" in the form, not Crossplane Compositions. Advanced users who write Compositions are typically:

• OpenOva engineers extending the public catalog.
• Sovereign-admins authoring private Compositions for their Sovereign.
• Corporate platform engineers contributing back upstream.

Compositions live in the Blueprint repo alongside the Helm chart / Kustomize manifests; CI signs and publishes them as part of the same OCI artifact.

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9. Visibility

Value	Where it appears	Who can install it
listed	Public marketplace card grid	Everyone in the Sovereign
unlisted	Not on cards; reachable by direct URL or search	Anyone who knows the Blueprint name
private	Visible only within the Org that owns the Blueprint repo	Only that Org's users

Org-private Blueprints live in the Org's shared-blueprints Gitea repo, which only that Org's users have access to.

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10. Versioning

• Semver (MAJOR.MINOR.PATCH).
• Each release publishes a signed OCI artifact at ghcr.io/openova-io/bp-<name>:<version> (where <name> is the folder name; the bp- prefix is added to the OCI artifact name to make it self-identifying as a Catalyst Blueprint).
• The Blueprint declares which prior versions are upgrade-compatible (upgrades.from).
• Customers pin to a version in their Application's kustomization.yaml. Upgrades are explicit (one-click in console, or a git push editing the version pin).

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11. CI pipeline

Catalyst uses a single monorepo CI at the root of github.com/openova-io/openova (see §2 for the folder layout and path-matrix tag form). The same pipeline shape applies to every platform/<name>/ and products/<name>/ folder:

# .github/workflows/blueprint-release.yaml (monorepo root)
on:
  pull_request:
    paths: ['platform/**', 'products/**']        # runs validate on PR
  push:
    tags:
      - 'platform/*/v*'                          # tag form: platform/<name>/v1.2.3
      - 'products/*/v*'                          #          products/<name>/v1.2.3

jobs:
  validate:                                      # runs on every PR touching a Blueprint folder
    - detect changed Blueprint folders (path-matrix)
    - for each: lint blueprint.yaml against the Blueprint CRD schema
                lint Helm chart / Kustomize base
                dry-run install in a kind cluster
                run tests/integration.yaml
                run tests/upgrade.yaml against the previous version

  build-and-sign:                                # runs only on tag push
    - parse the tag → identify which Blueprint folder + version
    - render that folder's Helm chart / Kustomize → OCI artifact
    - syft generate SBOM (per Blueprint)
    - cosign sign artifact + SBOM
    - push to ghcr.io/openova-io/bp-<folder-name>:<version>
    - publish blueprint.yaml as the OCI manifest's metadata layer

So tagging platform/wordpress/v1.3.0 triggers a build of platform/wordpress/'s contents and publishes ghcr.io/openova-io/bp-wordpress:1.3.0. Other Blueprint folders are untouched. This is what "monorepo with per-Blueprint fan-out" means in practice.

Catalyst's blueprint-controller watches the GHCR catalog and registers new versions automatically — they appear in the marketplace within seconds of a successful release.

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12. Authoring private Blueprints (in a customer Sovereign)

For corporate customers: the Org's platform team can author private Blueprints without involving OpenOva.

1. In the Catalyst console (Developer mode toggle on):
   Org context → Blueprint Studio → New Blueprint
2. Wizard offers two paths:
     a. Inherit from a public Blueprint (overlay path)
     b. Author from scratch (raw path)
3. Studio writes to gitea.<location-code>.<sovereign-domain>/<org>/shared-blueprints/bp-<name>.
4. On commit, CI runs (Gitea Actions inside the Sovereign).
5. blueprint-controller registers the new private Blueprint.
6. It appears in the Org's catalog as a private card.

Same flow works via direct git push to shared-blueprints. The console UI is convenience; Git is authoritative.

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13. Contributing back to the public catalog

If an Org's private Blueprint would be useful to other customers, they can contribute it upstream:

1. Fork github.com/openova-io/openova
2. Add the Blueprint folder under platform/<name>/ or products/<name>/.
   Include blueprint.yaml + chart/ or manifests/ + (optional) compositions/ + tests/.
3. Open PR against main.
4. OpenOva engineers review for security, reusability, license, supply-chain (cosign,
   SBOM, dependency licenses, secret hygiene).
5. Merge → CI signs and publishes ghcr.io/openova-io/bp-<name>:<semver>.
6. blueprint-controller in every Sovereign's Catalyst picks it up on next mirror sync.

The contribution path applies equally to Crossplane Compositions, Helm charts, and full Blueprints. This is how the community grows the catalog.

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14. Hard rules for Blueprint authors

Rule	Why
All container images cosigned	Supply-chain security; Kyverno admission policy denies unsigned.
All artifacts SBOMed	Compliance (EU CRA, NIS2).
No plaintext secrets in chart values; use ExternalSecret references	See SECURITY.md.
Workload identity via SPIFFE; no static service-account tokens	See SECURITY.md §2.
Health endpoints standardized: /healthz (liveness) + /readyz (readiness)	Catalyst observability assumes them.
Metrics on /metrics (Prometheus exposition)	Catalyst Grafana stack scrapes them.
Logs to stdout, structured JSON	Loki ingests them.
Traces via OTel	Tempo ingests them.
app.kubernetes.io/* labels set on every resource	Required for Catalyst projector to track.
Documentation in README.md, link from card.documentation	User clicks "Docs" on the card.
Acceptance tests in tests/	CI runs them on every PR.
Upgrade tests against previous version	Required to declare upgrade compatibility.

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Cross-reference ARCHITECTURE.md for the runtime model and SECURITY.md for credential handling.