--- title: How I Built a CI-Friendly Iceberg REST Catalog Test... description: Building a CI-friendly integration test environment for Apache Iceberg REST Catalog is challenging when docker-compose isn't available in the pipeline. This... canonical: https://daily.dev/posts/how-i-built-a-ci-friendly-iceberg-rest-catalog-test-environment-in-a-single-docker-image-iceberg--s9gkift69 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How I Built a CI-Friendly Iceberg REST Catalog Test Environment in a Single Docker Image: Iceberg… | daily.dev og:description: Building a CI-friendly integration test environment for Apache Iceberg REST Catalog is challenging when docker-compose isn't available in the pipeline. This... og:url: https://daily.dev/posts/how-i-built-a-ci-friendly-iceberg-rest-catalog-test-environment-in-a-single-docker-image-iceberg--s9gkift69 og:image: https://api.daily.dev/og/posts/S9gKIFt69.png og:image:alt: How I Built a CI-Friendly Iceberg REST Catalog Test Environment in a Single Docker Image: Iceberg… og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How I Built a CI-Friendly Iceberg REST Catalog Test Environment in a Single Docker Image: Iceberg… **[ITNEXT](https://daily.dev/sources/itnext)** · 10 min read · 0 upvotes · 0 comments ## Summary Building a CI-friendly integration test environment for Apache Iceberg REST Catalog is challenging when docker-compose isn't available in the pipeline. This post walks through collapsing a multi-service data lake stack (HDFS, Hive Metastore, MinIO, Iceberg REST Catalog) into a single Docker image under 5GB. Key techniques covered include Docker layer ordering for faster rebuilds, aggressive image size reduction (removing docs/examples saves 500MB+), deduplicating shared JVM libraries with symlinks, and using Supervisor to manage multiple services in one container. A Java smoke test client that validates each subsystem independently is recommended for faster debugging. Two common Iceberg+MinIO failure modes are detailed: credential misalignment between client and server, and bucket path-style access not being applied server-side. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [BigLake metastore now supports Iceberg REST Catalog](https://daily.dev/posts/biglake-metastore-now-supports-iceberg-rest-catalog-ne9xhokid) · Google Cloud · 0 upvotes · 0 comments - [How to Build an Open Source Data Lake for Batch Ingestion](https://daily.dev/posts/how-to-build-an-open-source-data-lake-for-batch-ingestion-g6w8pqtbg) · freeCodeCamp · 0 upvotes · 0 comments - [Scaling Grab's Data Lake: Our journey to Apache Iceberg adoption](https://daily.dev/posts/scaling-grab-s-data-lake-our-journey-to-apache-iceberg-adoption-ibvihkenm) · Grab Tech Blog · 6 upvotes · 0 comments - [Managed Iceberg Lakehouse: A Practical Guide](https://daily.dev/posts/managed-iceberg-lakehouse-a-practical-guide-qdlvpntka) · ITNEXT · 1 upvotes · 0 comments --- Tags: [#testing](https://daily.dev/tags/testing), [#docker](https://daily.dev/tags/docker), [#apache-iceberg](https://daily.dev/tags/apache-iceberg), [#apache-hadoop](https://daily.dev/tags/apache-hadoop) [View this post on daily.dev](https://daily.dev/posts/how-i-built-a-ci-friendly-iceberg-rest-catalog-test-environment-in-a-single-docker-image-iceberg--s9gkift69) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How I Built a CI-Friendly Iceberg REST Catalog Test Environment in a Single Docker Image: Iceberg…","url":"https://daily.dev/posts/how-i-built-a-ci-friendly-iceberg-rest-catalog-test-environment-in-a-single-docker-image-iceberg--s9gkift69","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-i-built-a-ci-friendly-iceberg-rest-catalog-test-environment-in-a-single-docker-image-iceberg--s9gkift69"},"datePublished":"2026-04-08T08:21:45.362Z","dateModified":"2026-04-08T08:22:14.031Z","description":"Building a CI-friendly integration test environment for Apache Iceberg REST Catalog is challenging when docker-compose isn't available in the pipeline. 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