Files
scylladb/docs
Patryk Jędrzejczak 1863386bc8 Merge '[Backport 2025.3] Raft-based recovery procedure: simplify rolling restart with recovery_leader' from Scylladb[bot]
The following steps are performed in sequence as part of the
Raft-based recovery procedure:
- set `recovery_leader` to the host ID of the recovery leader in
  `scylla.yaml` on all live nodes,
- send the `SIGHUP` signal to all Scylla processes to reload the config,
- perform a rolling restart (with the recovery leader being restarted
  first).

These steps are not intuitive and more complicated than they could be.

In this PR, we simplify these steps. From now on, we will be able to
simply set `recovery_leader` on each node just before restarting it.

Apart from making necessary changes in the code, we also update all
tests of the Raft-based recovery procedure and the user-facing
documentation.

Fixes scylladb/scylladb#25015

The Raft-based procedure was added in 2025.2. This PR makes the
procedure simpler and less error-prone, so it should be backported
to 2025.2 and 2025.3.

- (cherry picked from commit ec69028907)

- (cherry picked from commit 445a15ff45)

- (cherry picked from commit 23f59483b6)

- (cherry picked from commit ba5b5c7d2f)

- (cherry picked from commit 9e45e1159b)

- (cherry picked from commit f408d1fa4f)

Parent PR: #25032

Closes scylladb/scylladb#25335

* https://github.com/scylladb/scylladb:
  docs: document the option to set recovery_leader later
  test: delay setting recovery_leader in the recovery procedure tests
  gossip: add recovery_leader to gossip_digest_syn
  db: system_keyspace: peers_table_read_fixup: remove rows with null host_id
  db/config, gms/gossiper: change recovery_leader to UUID
  db/config, utils: allow using UUID as a config option
2025-08-07 09:58:13 +02:00
..
2025-06-30 10:30:13 +03:00
2024-11-06 14:09:28 +02:00
2025-05-28 11:04:25 +03:00
2025-02-20 11:24:34 +02:00
2025-05-13 13:29:04 +03:00

ScyllaDB Documentation

This repository contains the source files for ScyllaDB documentation.

  • The dev folder contains developer-oriented documentation related to the ScyllaDB code base. It is not published and is only available via GitHub.
  • All other folders and files contain user-oriented documentation related to ScyllaDB and are sources for docs.scylladb.com/manual.

To report a documentation bug or suggest an improvement, open an issue in GitHub issues for this project.

To contribute to the documentation, open a GitHub pull request.

Key Guidelines for Contributors

To prevent the build from failing:

  • If you add a new file, ensure it's added to an appropriate toctree, for example:

     .. toctree::
        :maxdepth: 2
        :hidden:
    
        Page X </folder1/article1>
        Page Y </folder1/article2>
        Your New Page </folder1/your-new-article>
    
  • Make sure the link syntax is correct. See the guidelines on creating links

  • Make sure the section headings are correct. See the guidelines on creating headings Note that the markup must be at least as long as the text in the heading. For example:

    ----------------------
    Prerequisites
    ----------------------
    

Building User Documentation

Prerequisites

  • Python
  • poetry
  • make

See the ScyllaDB Sphinx Theme prerequisites to check which versions of the above are currently required.

Mac OS X

You must have a working Homebrew in order to install the needed tools.

You also need the standard utility make.

Check if you have these two items with the following commands:

brew help
make -h

Linux Distributions

Building the user docs should work out of the box on most Linux distributions.

Windows

Use "Bash on Ubuntu on Windows" for the same tools and capabilities as on Linux distributions.

Building the Docs

  1. Run make preview to build the documentation.
  2. Preview the built documentation locally at http://127.0.0.1:5500/.

Cleanup

You can clean up all the build products and auto-installed Python stuff with:

make pristine

Information for Contributors

If you are interested in contributing to Scylla docs, please read the Scylla open source page at http://www.scylladb.com/opensource/ and complete a Scylla contributor agreement if needed. We can only accept documentation pull requests if we have a contributor agreement on file for you.

Third-party Documentation

  • Do any copying as a separate commit. Always commit an unmodified version first and then do any editing in a separate commit.

  • We already have a copy of the Apache license in our tree, so you do not need to commit a copy of the license.

  • Include the copyright header from the source file in the edited version. If you are copying an Apache Cassandra document with no copyright header, use:

This document includes material from Apache Cassandra.
Apache Cassandra is Copyright 2009-2014 The Apache Software Foundation.