HYPERFLEET-1482 - feat: add API auth failure observability - #291
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Included review availability: Your plan provides up to 12 included reviews per hour; 8 remain after this review. 📝 SummarySummary by CodeRabbit
WalkthroughThe change adds status-specific metrics for HTTP 401 and 403 failures. Executor phases log and record authentication failures with execution context. API errors no longer retain response bodies, while 404 classification occurs during error construction. Tests cover metrics, acknowledgments, failed events, logging, and redaction. Alerts and operational documentation cover detection and tenant-dimension troubleshooting. Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: ⚪ Minimal · up to The authentication-failure observability changes are covered by implementation and tests, with no current merge-blocking risk identified. Sequence Diagram(s)sequenceDiagram
participant API
participant ExecuteAPICall
participant Executor
participant Recorder
participant Prometheus
API-->>ExecuteAPICall: HTTP 401 or 403 response
ExecuteAPICall->>Executor: wrapped API error
Executor->>Recorder: record status-specific failure
Recorder->>Prometheus: increment authentication counter
Executor-->>Executor: log status and execution context
Suggested reviewers: 🚥 Pre-merge checks | ✅ 10 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (10 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 37.93% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 29 functions across 14 files. (3 skipped: 3 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
✨ Simplify code
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Risk Score: 3 —
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| Signal | Detail | Points |
|---|---|---|
| PR size | 777 lines (>500) | +2 |
| Sensitive paths | none | +0 |
| Test coverage | Missing tests for: pkg/errors | +1 |
Computed by hyperfleet-risk-scorer
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Inline comments:
In `@docs/alerts.md`:
- Line 58: Update the HyperFleet API 403 alert guidance in the relevant
documentation to include validating gateway-injected tenant dimensions when
tenant enforcement is enabled, before changing service-account tokens or subject
allowlists; apply this remediation consistently in both alert documentation and
the runbook.
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docs/alerts.mddocs/metrics.mddocs/runbook.mdinternal/executor/auth_failure_metrics_test.gointernal/executor/executor.gointernal/executor/handler.gointernal/executor/post_action_executor.gointernal/executor/precondition_executor.gointernal/executor/utils.gointernal/executor/utils_test.gointernal/hyperfleetapi/client_test.gopkg/errors/api_error.gopkg/metrics/recorder.gopkg/metrics/recorder_auth_failure_test.gopkg/metrics/recorder_test.go
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Inline comments:
In `@docs/alerts.md`:
- Around line 52-53: Update the authentication-failure alert expression to
require a repeated-failure threshold or failure ratio instead of triggering on
any positive rate. Preserve the five-minute duration requirement, and add alert
rule tests covering both isolated failures and repeated failures.
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Inline comments:
In `@test/alerts/hyperfleet-adapter-alerts.yaml`:
- Line 14: Update the HyperFleet alert description annotation to include missing
or empty tenant dimensions and tenant-header propagation among the
troubleshooting checks, or reference the corresponding runbook section, while
preserving the existing status-code and adapter context.
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Inline comments:
In `@docs/alerts.md`:
- Around line 54-56: Align HyperFleetAdapterAPIAuthFailures with the intended
three-in-five-minute policy by removing or reducing the for duration for an
any-three-in-five-minutes alert, or explicitly preserve a sustained-failure
policy and add a finite-burst test. Apply the same behavior and documentation
consistently in docs/alerts.md lines 54-56,
test/alerts/hyperfleet-adapter-alerts.yaml lines 7-9, and
test/alerts/hyperfleet-adapter-alerts_test.yaml lines 11-14.
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| groups: | ||
| - name: hyperfleet-adapter | ||
| rules: | ||
| - alert: HyperFleetAdapterAPIAuthFailures | ||
| expr: | | ||
| sum by (component, version, adapter_name, status_code) ( | ||
| increase(hyperfleet_adapter_api_auth_failures_total[5m]) | ||
| ) >= 3 | ||
| labels: | ||
| severity: critical | ||
| annotations: | ||
| summary: "HyperFleet Adapter API authentication or authorization failures" | ||
| description: "The HyperFleet API returned HTTP {{ $labels.status_code }} to {{ $labels.adapter_name }}. Check its service-account token, API gateway configuration, and subject allowlist. When tenant enforcement is enabled, verify tenant dimensions are present and non-empty and tenant headers are propagated." |
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Should we wire this up to the dashboard and ship an alert out of the box?
Right now this PR adds hyperfleet_adapter_api_auth_failures_total and a recommended alert rule (test/alerts/hyperfleet-adapter-alerts.yaml + docs/alerts.md), but two things stay outside the chart:
Dashboard panel — every other adapter metric (errors_total, resources_deleted_total, etc.) has a corresponding panel in charts/dashboards/hyperfleet-adapter.json, but auth failures don't. Without one, an on-call engineer looking at this dashboard during an incident won't see auth failures at all — they'd need to know to query Prometheus directly.
Alert deployment — there's no PrometheusRule template in charts/templates/, so the alert rule only exists as documentation (docs/alerts.md). It's not actually deployed anywhere by the chart; each SRE/team has to copy it into their own monitoring stack manually.
Given auth failures are meant to page someone (severity: critical), should we:
Add a panel for hyperfleet_adapter_api_auth_failures_total to the dashboard for parity with other metrics, and
Add a PrometheusRule template to the chart (gated behind a values flag, consistent with how other optional chart resources are toggled) so this alert ships out of the box instead of relying on manual setup per deployment?
Curious whether this was deliberately left as documentation-only or if it's a gap worth closing in this PR or a fast follow-up.
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+1 on the dashboard panel in this PR. Every other adapter metric has one in charts/dashboards/hyperfleet-adapter.json, and a "surface auth failures loudly" change that leaves the metric off the on-call dashboard undercuts itself. It is a small addition.
The PrometheusRule is a fair follow-up rather than a blocker here: the chart ships no alert rules today, so this PR matches the existing convention. Worth a ticket so it does not get lost.
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Ticket is sound and the PR lands the core of it: distinct 401/403 metric, error-level logs with phase and resource context, and an explicit ack decision with tests across all three phases. Nice work on the optional-parameter path, that is the subtle one.
One substantive blocker inline: the response body removal is global rather than auth-scoped, which contradicts the ticket's "existing behavior for non-auth errors unchanged" criterion. The rest are small follow-throughs (ack rationale in code, naming the operator in the runbook, wiring the alert test into CI). Happy to approve once the body change is scoped or split out.
| ResponseBody []byte | ||
| // brokenEndpoint reports whether a 404 response came from the API's | ||
| // catch-all route rather than a missing resource. | ||
| brokenEndpoint bool |
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This is the one change I would push back on. Dropping ResponseBody (and the two public helpers) applies to every status code, not just 401/403. ValidateAPIResponse now strips the body from the error message for all failures, and that message flows into adapter.executionError.message, which task configs render into status conditions written back to the API. So a 400 validation error from the API surfaces as "400 Bad Request" with none of the RFC 9457 problem details, in logs and on the resource.
HYPERFLEET-1482 explicitly says existing behavior for non-auth errors is unchanged, and a 401/403 body is unlikely to carry a token. Options, in order of preference:
- Keep the body on the error and just leave it out of the new
logAPIAuthFailureline. - Redact only when the status is 401 or 403.
- Split the global redaction into its own PR with its own justification.
Not opposed to the idea, just to it riding along unannounced under this ticket.
| errMsg = fmt.Sprintf("%s, response body: %s", errMsg, string(resp.Body)) | ||
| } | ||
| baseErr := fmt.Errorf("%s", errMsg) | ||
| baseErr := fmt.Errorf("API returned non-success status: %d %s", resp.StatusCode, resp.Status) |
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Same point as on api_error.go: this now drops the API's problem-details body for every non-success status, including 4xx validation errors that operators currently rely on to see what was rejected. If the body is kept on the error, this line can stay as it was.
| assert.Equal(t, tt.body, apiErr.ResponseBody) | ||
| assert.Contains(t, apiErr.Error(), string(tt.body)) | ||
| if len(tt.body) > 0 { | ||
| assert.NotContains(t, apiErr.Error(), string(tt.body)) |
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Flipping these from Contains to NotContains makes the global behavior change look intentional in the test suite. If we go with scoping redaction to 401/403, the 400/404/5xx cases should keep asserting the body is present.
| if result == nil { | ||
| return | ||
| } | ||
| for _, statusCode := range result.APIAuthFailureStatusCodes { |
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The ticket asks for the ack decision to be documented in the code with rationale, not only in the runbook. A short comment on AlwaysAck (or here) along the lines of "401/403 are deliberately acked: redelivery cannot repair credentials, allowlists, or tenant dimensions, so we surface via hyperfleet_adapter_api_auth_failures_total and rely on the HyperFleet operator to resync once fixed" would close that criterion.
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| HTTP 401 and 403 failures are ACKed under the normal event-failure policy; they are not redelivered automatically. Redelivery cannot repair invalid credentials, subject allowlists, or tenant dimensions. | ||
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| **Remediation:** For HTTP 403 responses with tenant enforcement enabled, verify the gateway-injected tenant dimensions before changing the projected service-account token or subject allowlist. If they are correct, check the token and allowlist, then rely on normal upstream reconciliation. |
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"rely on normal upstream reconciliation" is vague for someone on call at 3am. The thing that resyncs the resource whose status write was dropped is the HyperFleet operator, so say that: "once credentials are fixed, the HyperFleet operator will reconcile the affected resources; no redelivery is needed." That also tells them where to look if convergence does not happen.
| @@ -0,0 +1,33 @@ | |||
| rule_files: | |||
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Good to have this, but nothing runs it. test/alerts is new in this PR, no Makefile target references promtool or this directory, and the Prow presubmits are lint/unit/integration/images/validate-commits. Please add a test-alerts target that runs promtool test rules test/alerts/*_test.yaml and hook it into test-all (and whichever presubmit runs lint or unit), otherwise the threshold change from the earlier review thread is not actually enforced.
3 participants
what
adds a counter and structured logs for hyperfleet api 401/403 failures across parameter extraction, preconditions, and post-actions.
why
credential and authorization failures need to be visible for remediation, including optional api-backed parameters that fall back and allow the event to succeed.
approach
records 401/403 status codes on the execution result for ignored optional parameter failures, then emits the auth-failure metric independently of the final event status. logs include the phase and parameter or post-action context without response bodies.
tested
go test ./internal/executorgit diff --check