Apache Iceberg Documentation Site

Clone this repo:
  1. c5ce40a Add full docs for 1.3.0 (#244) by Anton Okolnychyi · 5 days ago main
  2. 9b96cc1 Common docs for 1.3.0 (#241) by Anton Okolnychyi · 5 days ago
  3. c827f2d Update Slack invite link in header.html (#237) by Ajantha Bhat · 4 weeks ago
  4. 2dac291 Docs: Update Iceberg Slack Join Link (#236) by Russell Spitzer · 4 weeks ago
  5. a69e6a3 Add link to Iceberg 1.2.1 (#233) by Eduard Tudenhoefner · 5 weeks ago

Apache Iceberg Documentation Site

This repository contains the documentation for Apache Iceberg. It's built with Hugo and hosted at https://iceberg.apache.org.


The Iceberg documentation site is actually constructed from two hugo sites. The first, is the landing page. The second site, is the documentation site which contains the full Iceberg documentation, including the javadoc. The landing page and documentation sites are completely self-contained in the ./landing-page and ./docs directories, respectively. The Javadocs are in the ./javadoc directory.

Relationship to the Iceberg Repository

All markdown pages that are specific to an Iceberg version are maintained in the iceberg repository. All pages common across all version releases are kept here in the iceberg-docs repo. A few exceptions are the markdown files that can be found in the format folder in the iceberg repository and contains markdown files that are copied into ./landing-page/content/common/.


  • The docs folder in the Iceberg repository contains all the markdown docs used by the versioned docs site.
  • The format folder contains some items that are common across all versions, such as the Iceberg format specification.


  • The docs/content/docs folder is the target folder when copying the docs over during a version release
  • The landing-page/content/common folder is where you can find the common markdown files shared across all versions

During each new release, the release manager will:

  1. Copy the contents under format in the iceberg repo to ./landing-page/content/common/ in the main branch
  2. Create a branch in this repo from main named for the release version
  3. Copy the contents under docs in the iceberg repo to ./docs/content/docs in the release branch
  4. Generate the javadocs for the release and copy them into the javadoc directory in the release branch
  5. Update the latest branch HEAD to point to the release branch HEAD

How to Contribute

Submitting Pull Requests

Changes to the markdown contents for version specific pages should be submitted directly in the Iceberg repository.

Changes to the markdown contents for common pages should be submitted to this repository against the main branch.

Changes to the website appearance (e.g. HTML, CSS changes) should be submitted to this repository against the main branch.

Changes to the documentation of old Iceberg versions should be submitted to this repository against the specific version branch.

In summary, you can open a PR against where you find the related markdown file. With the exception of spec.md, there are no duplicate markdown files between the master branch in the iceberg repo and the main branch in the iceberg-docs repo. For changes to spec.md, PRs should be opened against the iceberg repo, not the iceberg-docs repo.

Reporting Issues

All issues related to the doc website should still be submitted to the Iceberg repository. The GitHub Issues feature of this repository is disabled.

Running Locally

Clone this repository to run the website locally:

git clone git@github.com:apache/iceberg-docs.git
cd iceberg-docs

To start the landing page site locally, run:

(cd landing-page && hugo serve)

To start the documentation site locally, run:

(cd docs && hugo serve)

If you would like to see how the latest website looks based on the documentation in the Iceberg repository, you can copy docs to this repository by:

rm -rf docs/content/docs
cp -r <path to iceberg repo>/docs docs/content/docs
cp -r <path to iceberg repo>/format/* landing-page/content/common/

Scanning For Broken Links

If you'd like to scan for broken links, one available tool is linkcheck that can be found here.

How the Website is Deployed

Note: If you are a release manager looking to release a new version of the website as part of an Iceberg release, please refer to the Documentation Release section of the How to Release page.

Landing Page Deployment

The landing page site is automatically deployed to the root of the asf-site branch by the deploy-landing-page job in the deployment workflow. There is only a single version of the landing page site, and the deploy-landing-page job only runs on commits to the main branch.

Docs Deployment

The docs site is automatically deployed to the docs directory in the asf-site branch, into a sub-directory named after the branch where the commit occured. This is performed by the deploy-docs job in the deployment workflow. The job deploys the docs site on commits to any branch except main. A branch is maintained for each Iceberg version. If the job runs and the directory does not yet exist in the asf-site branch, it will be created.

Additionally, the contents of the javadoc directory is deployed to a javadoc/<branch_name> directory in the asf-site branch.

Latest Docs

In ./docs/redirect/index.html, a redirect meta tag exists to forward /docs and /latest to /docs/latest.

asf-site Branch Structure

The asf-site branch structure is the following:

├── docs
│   ├── 0.12.1
│   │   └── <Full Docs Site @0.12.1>
│   ├── latest
│   │   └── <Full Docs Site @latest>
│   └── index.html  <-- Includes a redirect to 0.12.1 which is the latest version
├── javadoc
│   ├── 0.12.1
│   │   └── <Full javadoc site @0.12.1>
│   └── latest
│       └── <Full javadoc Site @latest>
└── <Full Landing Page Site>

A non-main branch commit deploys the docs site into a new sub-directory in the asf-site branch‘s docs directory, as well as copies the javadoc directory into a new sub-directory in the asf-site branch’s javadoc directory.

A main branch commit deploys the landing page site only and overwrites the landing page site at the root of the asf-site branch.


Redirects within one of the two sites can easily be done using the aliases keyword in the YAML Front Matter. You can read more about this Hugo URL Management feature here.

For root level redirects that are outside of both sites, the ./redirects directory contains pages with redirect meta tags. These are all deployed at the root level of the asf-site branch by the Deploy redirects step in the deployment workflow.

Testing Both Sites Locally

In some cases, it's useful to test both the landing-page site and the docs site locally. Especially in situations where you need to test relative links between the two sites. This can be achieved by building both sites with custom baseURL and publishDir values passed to the CLI. You can then run the site with any local live server, such as the Live Server extension for VSCode.

First, change into the landing-page directory and build the site. Use -b and -d to set baseURL and publishDir, respectively.

cd landing-page
hugo -b http://localhost:5500/ -d ../public

Next, change into the docs directory and do the same thing. Remember that the docs-site is deployed to a docs/<VERSION> url, relative to the landing-page site. Since the landing-page was deployed to ../publish in the example above, the example below usees ../public/docs/latest to deploy a latest version docs-site.

cd ../docs
hugo -b http://localhost:5500/docs/latest/ -d ../public/docs/latest

You should then have both sites deployed to the public directory which you can launch using your live server.

Note: The examples above use port 5500. Be sure to change the port number if your local live server uses a different port.