obelix74 commented on code in PR #4707:
URL: https://github.com/apache/polaris/pull/4707#discussion_r3431937184
##########
polaris-core/src/main/java/org/apache/polaris/core/config/FeatureConfiguration.java:
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@@ -209,6 +209,64 @@ public static void enforceFeatureEnabledOrThrow(
.defaultValue(List.<String>of())
.buildFeatureConfiguration();
+ //
---------------------------------------------------------------------------
+ // GCS principal attribution via Workload Identity Federation
+ //
+ // GCP downscoped credentials have no session-tag mechanism (unlike AWS
STS), and custom audit
+ // headers only reach GCS audit logs if the client forwards them. To
attribute GCS data access
+ // to the Polaris principal for ANY client, credential vending can chain
+ // catalog-signed JWT -> STS token exchange -> per-catalog service-account
impersonation, so the
+ // principal appears in serviceAccountDelegationInfo of every GCS Data
Access audit log entry.
+ //
+ // Attribution activates automatically once the audience, issuer, and
signing key file are all
+ // set (no on/off flag); it additionally requires a gcpServiceAccount on the
storage config.
+ //
---------------------------------------------------------------------------
+
+ public static final FeatureConfiguration<String>
GCS_PRINCIPAL_ATTRIBUTION_WIF_AUDIENCE =
Review Comment:
Done (commit 30e69a383). Added a new full constructor
`GcpCredentialsStorageIntegration(..., Optional<GcpAttributionParams>
attributionParams)` so downstream builds can pass their own attribution config
directly. The existing constructors continue to work via a new public static
`resolveAttributionParams(RealmConfig)` helper that preserves the current
fail-fast validation. The old private `principalAttributionConfigured()` method
is removed — its logic now lives in `resolveAttributionParams()`.
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