This document is for a development version of Ceph.
The documentation on docs.ceph.com is generated from the restructuredText
/doc/ in the Ceph git repository.
Please make sure that your changes are written in a way that is intended
for end users of the software, unless you are making additions in
/doc/dev/, which is the section for developers.
All pull requests that modify user-facing functionality must include corresponding updates to documentation: see Submitting Patches for more detail.
Check your .rst syntax is working as expected by using the “View”
button in the github user interface when looking at a diff on
an .rst file, or build the docs locally using the
For more information about the Ceph documentation, see Documenting Ceph.
The general format for function documentation is:
/** * Short description * * Detailed description when necessary * * preconditons, postconditions, warnings, bugs or other notes * * parameter reference * return value (if non-void) */
This should be in the header where the function is declared, and functions should be grouped into logical categories. The librados C API provides a complete example. It is pulled into Sphinx by librados.rst, which is rendered at Librados (C).
To generate the doxygen documentation in HTML format use:
# make doxygen
HTML output will be under:
Most of the time, you’ll want to put the actual DOT source in a separate file, like this:
.. graphviz:: myfile.dot
If a use arises, we can integrate Blockdiag. It is a Graphviz-style declarative language for drawing things, and includes:
You can use Inkscape to generate scalable vector graphics. https://inkscape.org/en/ for restructedText documents.
If you generate diagrams with Inkscape, you should commit both the Scalable Vector Graphics (SVG) file and export a Portable Network Graphic (PNG) file. Reference the PNG file.
By committing the SVG file, others will be able to update the SVG diagrams using Inkscape.
HTML5 will support SVG inline.