OSAC-4727: Store ComputeInstance and BareMetalInstance user data as secrets

[danielerez]

What

Adds a tenant-scoped user_data_secret (SecretLocalReference) to
ComputeInstanceSpec and BareMetalInstanceSpec, mutually exclusive with the
existing inline user_data. When set, the fulfillment-service resolves the
referenced OSAC Secret and uses its content when creating the instance-owned
Kubernetes Secret, instead of persisting cloud-init/ignition data inline in
Postgres. This keeps tokens, certs, and other sensitive material out of the
main resource rows.

Implements the same dual-path pattern already established in this epic for
pull_secret_secret (Cluster) and client_secret_secret (IdentityProvider).

Jira: https://redhat.atlassian.net/browse/OSAC-4727 (parent epic OSAC-2953)
Unblocks: OSAC-4729 (CLI support)

Changes

Proto (proto/private/, regenerated public + Go)

• ComputeInstanceSpec.user_data_secret = 20 (IMMUTABLE)
• BareMetalInstanceSpec.user_data_secret = 10

Servers

• Shared validateUserDataSecret helper: resolves the reference within
  tenant/project scope, rejects shared-tenant secrets, hydrates Vault-backed
  data, requires a non-empty userdata entry, and backfills the canonical
  Secret id + name.
• Create/update mutual exclusion between user_data and user_data_secret,
  mask-aware on update.
• BareMetal user_data (already immutable) and both instances' secret
  references allow only the atomic inline → reference migration; the reference
  is immutable thereafter.
• Wire SecretStore/Secret DAO into both instance server builders.

Reconcilers

• Dual-path resolveUserData: fetch the referenced Secret's userdata key via
  the private Secrets API, else fall back to inline user_data. Instance-owned
  Kubernetes Secret ownership and wiring unchanged.

Testing

• New server-level tests: id-only/name-only resolution to canonical id+name,
  missing userdata entry, empty id+name, shared-tenant rejection, create/update
  mutual exclusion, BareMetal and Compute atomic migration, and Compute
  reference immutability.
• New reconciler tests: referenced-Secret path, fetch-error propagation, and
  missing-userdata rejection for both instance types.
• go build, go vet, buf lint, gofmt clean; internal/servers,
  controllers/computeinstance, and controllers/baremetalinstance suites pass.

Summary

• API surface: Adds tenant-scoped user_data_secret fields to compute and bare-metal instance specifications. Regenerates API consumers.
• Validation and security: Enforces mutual exclusion with inline user_data. Validates tenant access, secret type, Vault access, non-empty userdata, and maximum size. Normalizes valid local references.
• Controllers: Resolves referenced secrets through the Secrets API. Uses the resolved userdata when creating instance-owned Kubernetes Secrets.
• Server architecture: Adds Secret DAO and Vault secret-store wiring to compute and bare-metal instance servers.
• Update behavior: Supports atomic migration from inline user_data to user_data_secret. Enforces reference immutability and update-mask-aware validation. Maps lookup failures to gRPC statuses.
• Tests: Adds Secrets API mocks and coverage for validation, tenant isolation, reconciliation, fetch failures, missing data, size limits, migration, assignment, and immutability.
• CI and quality: Build, vet, lint, formatting, and relevant test suites pass. CI confirmed Jira issue OSAC-4727. The issue has no target version, while the target branch expects 5.1.0.

Backward compatibility

Existing inline user_data remains supported. Clients can adopt user_data_secret without changing other fields. Updates that set both sources are rejected. Existing secret references cannot change after creation. Clients must provide a valid tenant-scoped Secret when using user_data_secret.

Risk classification

risk:show — The change modifies public APIs, instance creation and update behavior, reconciliation, and sensitive user-data handling. It changes secret resolution paths but includes validation, tenant-isolation, migration, immutability, size-limit, and failure-case tests. It is close to risk:ask because it changes security-sensitive secret handling, but it does not introduce an untested migration, destructive operation, or known failing validation path.

[openshift-ci-robot]

@danielerez: This pull request references OSAC-4727 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the task to target the "5.1.0" version, but no target version was set.

Details

In response to this:

What

Adds a tenant-scoped user_data_secret (SecretLocalReference) to
ComputeInstanceSpec and BareMetalInstanceSpec, mutually exclusive with the
existing inline user_data. When set, the fulfillment-service resolves the
referenced OSAC Secret and uses its content when creating the instance-owned
Kubernetes Secret, instead of persisting cloud-init/ignition data inline in
Postgres. This keeps tokens, certs, and other sensitive material out of the
main resource rows.

Implements the same dual-path pattern already established in this epic for
pull_secret_secret (Cluster) and client_secret_secret (IdentityProvider).

Jira: https://redhat.atlassian.net/browse/OSAC-4727 (parent epic OSAC-2953)
Unblocks: OSAC-4729 (CLI support)

Changes

Proto (proto/private/, regenerated public + Go)

• ComputeInstanceSpec.user_data_secret = 20 (IMMUTABLE)
• BareMetalInstanceSpec.user_data_secret = 10

Servers

• Shared validateUserDataSecret helper: resolves the reference within
  tenant/project scope, rejects shared-tenant secrets, hydrates Vault-backed
  data, requires a non-empty userdata entry, and backfills the canonical
  Secret id + name.
• Create/update mutual exclusion between user_data and user_data_secret,
  mask-aware on update.
• BareMetal user_data (already immutable) and both instances' secret
  references allow only the atomic inline → reference migration; the reference
  is immutable thereafter.
• Wire SecretStore/Secret DAO into both instance server builders.

Reconcilers

• Dual-path resolveUserData: fetch the referenced Secret's userdata key via
  the private Secrets API, else fall back to inline user_data. Instance-owned
  Kubernetes Secret ownership and wiring unchanged.

Testing

• New server-level tests: id-only/name-only resolution to canonical id+name,
  missing userdata entry, empty id+name, shared-tenant rejection, create/update
  mutual exclusion, BareMetal and Compute atomic migration, and Compute
  reference immutability.
• New reconciler tests: referenced-Secret path, fetch-error propagation, and
  missing-userdata rejection for both instance types.
• go build, go vet, buf lint, gofmt clean; internal/servers,
  controllers/computeinstance, and controllers/baremetalinstance suites pass.

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Run ID: 6e9ccef3-7b5f-4d51-a7f6-6d01aa65033f

📥 Commits

Reviewing files that changed from the base of the PR and between 341b716 and a83b73c.

⛔ Files ignored due to path filters (3)

• osac-metering/metering-service/internal/api/osac/private/v1/baremetal_instance_type.pb.go is excluded by !**/*.pb.go
• osac-operator/internal/api/osac/private/v1/baremetal_instance_type.pb.go is excluded by !**/*.pb.go
• osac-operator/internal/api/osac/private/v1/baremetal_instance_type_protoopaque.pb.go is excluded by !**/*.pb.go

📒 Files selected for processing (2)

• fulfillment-service/internal/servers/user_data_secret_validation.go
• fulfillment-service/internal/servers/user_data_secret_validation_test.go

🚧 Files skipped from review as they are similar to previous changes (2)

• fulfillment-service/internal/servers/user_data_secret_validation.go
• fulfillment-service/internal/servers/user_data_secret_validation_test.go

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---

Walkthrough

Compute and bare metal instance APIs now support user data from referenced Secrets. Servers validate and resolve references through DAO and Vault integrations. Reconcilers fetch userdata and store the resolved value in Kubernetes Secrets.

Changes

Secret-backed user data

Layer / File(s)	Summary
User-data Secret contracts and validation fulfillment-service/proto/*/osac/*/v1/*_instance_type.proto, fulfillment-service/internal/servers/user_data_secret_validation*	Compute and bare metal specifications add immutable user_data_secret references. Validation resolves references, checks access, loads Vault data, and validates userdata.
Server integration and update rules fulfillment-service/internal/servers/*_instances_server.go, fulfillment-service/internal/cmd/service/start/grpcserver/register_servers.go	Builders and registrations pass the Vault secret store. Private servers construct Secret DAOs and enforce mutual exclusion, update-mask, migration, and immutability rules.
Reconciler resolution and test support fulfillment-service/internal/controllers/computeinstance/*, fulfillment-service/internal/controllers/baremetalinstance/*	Reconcilers fetch referenced Secrets and write resolved user data to Kubernetes Secrets. Tests and generated gRPC mocks cover lookup, validation, and error propagation.

Estimated code review effort: 4 (Complex) | ~45 minutes

Merge Risk: ⚪ Minimal · up to c22e5

This change adds secret-backed user data references for compute and bare metal instances while retaining validation, immutability, migration, and reconciliation coverage. No current merge-blocking risk is established.

Sequence Diagram(s)

sequenceDiagram
  participant InstanceReconciler
  participant SecretsClient
  participant SecretsService
  participant KubernetesSecret
  InstanceReconciler->>SecretsClient: Get referenced Secret
  SecretsClient->>SecretsService: Fetch Secret by reference
  SecretsService-->>SecretsClient: Return Secret data
  SecretsClient-->>InstanceReconciler: Return userdata
  InstanceReconciler->>KubernetesSecret: Create or update resolved user-data

Loading

Suggested labels: risk:ask

🚥 Pre-merge checks | ✅ 10 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 14 functions across 13 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (10 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: storing ComputeInstance and BareMetalInstance user data as secrets.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
No-Hardcoded-Secrets	✅ Passed	No hardcoded secret was introduced. The full PR diff adds no API-key, token, password, private-key, credential URL, vendor credential pattern, or base64/hex blob over 32 characters. The new literals a…
No-Weak-Crypto	✅ Passed	PASS. The pull-request diff adds no MD5, SHA-1, DES, RC4, 3DES, Blowfish, or ECB usage. It adds no crypto imports, custom crypto, or token comparison logic. The user_data string comparison existed b…
No-Injection-Vectors	✅ Passed	No listed injection vector was introduced. The PR-added production paths use DAO lookups, gRPC SecretsClient.Get, and SecretStore.Fetch; they do not call eval, exec, pickle.loads, unsafe YAM…
Container-Privileges	✅ Passed	No container privilege condition was introduced. The PR diff from 891e93e to a83b73c contains only Go and proto files. It contains no Kubernetes/container manifests, Dockerfiles, or YAML/JSON …
No-Sensitive-Data-In-Logs	✅ Passed	No changed log statement records secret contents or user_data. The new logs record generic operation failures via the error object and do not include returned secret data, passwords, tokens, or API ke…
Ai-Attribution	✅ Passed	AI use is explicitly attributed in the five OSAC-4727 commits. Each commit has an Assisted-by: trailer naming Codex or Claude, and none has a Co-Authored-By: trailer.

Full details: No-Hardcoded-Secrets

Explanation

No hardcoded secret was introduced. The full PR diff adds no API-key, token, password, private-key, credential URL, vendor credential pattern, or base64/hex blob over 32 characters. The new literals are code constants such as "userdata", error messages, and test placeholders such as "referenced-data" and "source-secret-id"; none contain secret material. The generated API changes and configuration-file scan also show no credential data.

Full details: No-Weak-Crypto

Explanation

PASS. The pull-request diff adds no MD5, SHA-1, DES, RC4, 3DES, Blowfish, or ECB usage. It adds no crypto imports, custom crypto, or token comparison logic. The user_data string comparison existed before the pull request. New comparisons only check reference presence or protobuf reference equality.

Full details: No-Injection-Vectors

Explanation

No listed injection vector was introduced. The PR-added production paths use DAO lookups, gRPC SecretsClient.Get, and SecretStore.Fetch; they do not call eval, exec, pickle.loads, unsafe YAML loading, os.system, shell=True, or dangerouslySetInnerHTML. The added migration is static SQL. Its test uses PostgreSQL placeholders for inserted values; its string concatenation builds JSON test data, not SQL. The final added-line audit found no SQL-looking string concatenation.

Full details: Container-Privileges

Explanation

No container privilege condition was introduced. The PR diff from 891e93e to a83b73c contains only Go and proto files. It contains no Kubernetes/container manifests, Dockerfiles, or YAML/JSON configuration, and no added privileged, hostPID, hostNetwork, hostIPC, SYS_ADMIN, allowPrivilegeEscalation, or root-user settings.

Full details: No-Sensitive-Data-In-Logs

Explanation

No changed log statement records secret contents or user_data. The new logs record generic operation failures via the error object and do not include returned secret data, passwords, tokens, or API keys. Reconciler logging records only Kubernetes Secret namespace and name. The validation helper reads the userdata bytes but never passes them to a logger; its error messages contain only reference metadata or data size. The added error logging also follows the existing secret-reference validation pattern.

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Actionable comments posted: 6

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Inline comments:
In `@fulfillment-service/internal/servers/private_baremetal_instances_server.go`:
- Around line 965-966: Update the user_data_secret immutability guard in the
bare-metal instance update validation to require an existing user-data secret
reference before rejecting changes, matching the compute implementation.
Preserve the atomic migration behavior, and add a validation test covering
first-time assignment of a secret reference when the instance has no existing
user data.
- Around line 385-388: Update both validateUserDataMutualExclusionForUpdate
helpers to classify errors from the dao.Get().SetId(...).Do(ctx) lookup before
returning: use errors.As to map *dao.ErrNotFound to grpccodes.NotFound and map
all other lookup errors to grpccodes.Internal, preserving successful lookups and
subsequent validation.

In `@fulfillment-service/internal/servers/user_data_secret_validation.go`:
- Around line 82-86: Update validateUserDataSecret to reject referenced userdata
values exceeding the same 64 KiB limit enforced for inline spec.user_data, while
preserving the existing non-empty validation and InvalidArgument response.
Ensure the limit is applied before resolveUserData copies the value into
corev1.Secret.StringData, reusing the existing size-limit symbol if available.
- Line 47: Add a cross-tenant Secret validation test around the
references.NewDAOLookupFunc lookup, configuring restricted tenant visibility so
a Secret owned by tenant B is not resolvable by tenant A. Assert that the lookup
or validation rejects the cross-tenant reference while preserving access to
permitted and shared Secrets.
- Around line 73-81: Update validateUserDataSecret so a Vault-backed secret with
empty inline data returns a gRPC Internal error when secretStore is nil, before
calling secretStore.Fetch; preserve the existing fetch and error handling when
the store is available.

In
`@fulfillment-service/proto/private/osac/private/v1/baremetal_instance_type.proto`:
- Line 161: Update the user_data_secret field in the private bare-metal instance
type definition to include the google.api.field_behavior IMMUTABLE annotation,
matching PrivateBareMetalInstancesServer enforcement and generated API metadata.

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Configuration used: Repository: osac-project/coderabbit/.coderabbit.yaml

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📥 Commits

Reviewing files that changed from the base of the PR and between b6c2ad1 and ee10e0e.

⛔ Files ignored due to path filters (14)

• fulfillment-service/internal/api/osac/private/v1/baremetal_instance_type.pb.go is excluded by !**/*.pb.go
• fulfillment-service/internal/api/osac/private/v1/baremetal_instance_type_protoopaque.pb.go is excluded by !**/*.pb.go
• fulfillment-service/internal/api/osac/private/v1/compute_instance_type.pb.go is excluded by !**/*.pb.go
• fulfillment-service/internal/api/osac/private/v1/compute_instance_type_protoopaque.pb.go is excluded by !**/*.pb.go
• fulfillment-service/internal/api/osac/public/v1/baremetal_instance_type.pb.go is excluded by !**/*.pb.go
• fulfillment-service/internal/api/osac/public/v1/baremetal_instance_type_protoopaque.pb.go is excluded by !**/*.pb.go
• fulfillment-service/internal/api/osac/public/v1/compute_instance_type.pb.go is excluded by !**/*.pb.go
• fulfillment-service/internal/api/osac/public/v1/compute_instance_type_protoopaque.pb.go is excluded by !**/*.pb.go
• osac-metering/metering-service/internal/api/osac/private/v1/baremetal_instance_type.pb.go is excluded by !**/*.pb.go
• osac-metering/metering-service/internal/api/osac/private/v1/compute_instance_type.pb.go is excluded by !**/*.pb.go
• osac-operator/internal/api/osac/private/v1/baremetal_instance_type.pb.go is excluded by !**/*.pb.go
• osac-operator/internal/api/osac/private/v1/baremetal_instance_type_protoopaque.pb.go is excluded by !**/*.pb.go
• osac-operator/internal/api/osac/private/v1/compute_instance_type.pb.go is excluded by !**/*.pb.go
• osac-operator/internal/api/osac/private/v1/compute_instance_type_protoopaque.pb.go is excluded by !**/*.pb.go

📒 Files selected for processing (17)

• fulfillment-service/internal/cmd/service/start/grpcserver/register_servers.go
• fulfillment-service/internal/controllers/baremetalinstance/baremetalinstance_reconciler_function.go
• fulfillment-service/internal/controllers/baremetalinstance/baremetalinstance_reconciler_function_test.go
• fulfillment-service/internal/controllers/baremetalinstance/secrets_client_mock.go
• fulfillment-service/internal/controllers/computeinstance/computeinstance_reconciler_function.go
• fulfillment-service/internal/controllers/computeinstance/computeinstance_reconciler_function_test.go
• fulfillment-service/internal/controllers/computeinstance/secrets_client_mock.go
• fulfillment-service/internal/servers/baremetal_instances_server.go
• fulfillment-service/internal/servers/compute_instances_server.go
• fulfillment-service/internal/servers/private_baremetal_instances_server.go
• fulfillment-service/internal/servers/private_compute_instances_server.go
• fulfillment-service/internal/servers/user_data_secret_validation.go
• fulfillment-service/internal/servers/user_data_secret_validation_test.go
• fulfillment-service/proto/private/osac/private/v1/baremetal_instance_type.proto
• fulfillment-service/proto/private/osac/private/v1/compute_instance_type.proto
• fulfillment-service/proto/public/osac/public/v1/baremetal_instance_type.proto
• fulfillment-service/proto/public/osac/public/v1/compute_instance_type.proto

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Auto-dismissed: only Prow labels gate merging

[danielerez]

/e2e-ready

[github-actions]

Labeled e2e-ready on a83b73c. Starting expensive e2e (cleanup removes the label on next push).

[danielerez]

/retest

[github-actions]

Re-triggered failed runs:

• label-gate (#33777006537)

[github-actions]

Removed e2e-ready due to new commits. Re-run /e2e-ready or get lgtm / CodeRabbit approval to unlock expensive e2e.

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: DakCrowder, danielerez

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PR needs rebase.

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