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Apache Polaris

Apache Polaris™ is an open-source implementation of the Iceberg REST Catalog protocol — a managed HTTP service that owns the mapping from logical table name → current Iceberg snapshot pointer + schema + partition spec + ACL metadata. Originated as Snowflake Open Catalog and subsequently open-sourced as an Apache project.

Role on the wiki

Polaris appears across the Redpanda lakehouse corpus as one of four named managed / open-source REST catalogs Redpanda products integrate with alongside Databricks Unity Catalog, AWS Glue, and GCP BigLake. The Snowflake Open Catalog hosted form is the commercial peer of the OSS Polaris project.

Stub scope

This page is a minimal anchor. Named across the Redpanda Iceberg corpus as a REST-catalog integration target but not given a dedicated wiki home until the 2026-03-05 Iceberg output launch post explicitly worked its OAuth2 client-credentials flow in the canonical YAML example (Source: sources/2026-03-05-redpanda-introducing-iceberg-output-for-redpanda-connect).

Integration surface

Speaks the standard Iceberg REST Catalog API. Authentication is typically OAuth2 client-credentials; per-tenant isolation is idiomatic (one realm / warehouse per tenant). The Redpanda Connect iceberg output's example config points at a Polaris instance via:

catalog:
  url: https://polaris.example.com/api/catalog
  warehouse: analytics
  auth:
    oauth2:
      client_id: "${CATALOG_CLIENT_ID}"
      client_secret: "${CATALOG_CLIENT_SECRET}"

Seen in

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