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autogenerate_config_docs

Automatically generate configuration tables to document OpenStack.

Dependencies: python-git (at least version 0.3.2 RC1), oslo.config, oslo-incubator, openstack-doc-tools

Setting up your environment

Note: This tool is best run in a fresh VM environment, as running it requires installing the dependencies of the particular OpenStack product you are working with. Installing all of that on your normal machine could leave you with a bunch of cruft!

Install git and python-pip:

$ sudo apt-get install git python-pip

Install oslo.config and GitPython:

$ sudo pip install oslo.config "GitPython>=0.3.2.RC1"

Install oslo-incubator from git:

$ git clone git://git.openstack.org/openstack/oslo-incubator
$ cd oslo-incubator
$ python setup.py build
$ sudo python setup.py install

Check out the repository you are working with:

$ git clone https://git.openstack.org/openstack/nova.git

(This guide makes reference to a /repos directory, so you should record the directory you are using and replace as appropriate below.)

Check out the tool itself:

$ git clone https://git.openstack.org/openstack/openstack-doc-tools.git

Install the dependencies for the product you are working with:

$ sudo pip install -r nova/requirements.txt

Note 1: Occasionally, the requirements.txt file does not reference all dependencies needed to import all modules in a package. You may need to manually install some dependencies with pip or your distro's package manager. Always check the log for failed imports.

Note 2: Although this tool imports from your checkout, occasionally conflicts happen with installed files (e.g. a change from foo/bar.py to foo/bar/init.py). For best results, uninstall the old product and install from git using setup.py.

Using the tool

This tool is divided into three parts:

Extraction of flags names

$ openstack-doc-tools/autogenerate_config_docs/autohelp.py create nova -i /repos/nova

You only need to use the create action to add a new product. Otherwise, use update.

$ openstack-doc-tools/autogenerate_config_docs/autohelp.py update nova -i /repos/nova

The create action will create a new nova.flagmappings file, possibly overriding an existing file. The update action will create a nova.flagmappings.new file, merging in group information from the existing nova.flagmappings file.

Grouping of flags

This is currently done manually, by using the flag name file and placing a category after a space.

$ head nova.flagmappings
aggregate\_image\_properties\_isolation\_namespace scheduling
aggregate\_image\_properties\_isolation\_separator scheduling
allow\_instance\_snapshots policy
allow\_migrate\_to\_same\_host policy
allow\_resize\_to\_same\_host policy
allow\_same\_net\_traffic network
allowed\_direct\_url\_schemes glance
...

Creation of docbook-formatted configuration table files

$ openstack-doc-tools/autogenerate_config_docs/autohelp.py docbook nova -i /repos/nova

Duplicate options

Sometimes the log will tell you there was a duplicate option name. This often happens if a parent module does import * from a child module. For example, nova.db does from nova.db.api import *. If one module name is a child of the other, the tool will use the option from the more specific module and tell you so. This is probably not a problem.

If the tool tells you it's chosing one at random, then something else is happening, and you should investigate. Otherwise, you may lose an option.

A worked example - updating the docs for Icehouse

update automatically generated tables - from scratch

$ sudo apt-get update $ sudo apt-get install git python-pip python-dev $ sudo pip install git-review GitPython $ git clone git://git.openstack.org/openstack/openstack-manuals.git $ git clone git://git.openstack.org/openstack/openstack-doc-tools.git $ cd openstack-manuals/ $ git review -d 35726 $ cd tools/autogenerate-config-flagmappings

Now, cloning and installing requirements for nova, glance, quantum

$ for i in nova glance neutron; do git clone git://git.openstack.org/openstack/$i.git; done $ for i in nova glance neutron; do sudo pip install -r $i/requirements.txt; done

This missed some requirements for nova, which were fixed by:

$ sudo pip install python-glanceclient websockify pyasn1 python-cinderclient error_util $ sudo apt-get install python-ldap python-lxml

Making the flag names update

$ ../../openstack-doc-tools/autogenerate_config_docs/autohelp.py -vvv update nova -i ~/nova > nova.log

At this point, search through nova.flagmappings.new for anything labelled Unknown and fix, once that is done use:

$ ../../openstack-doc-tools/autogenerate_config_docs/autohelp.py -vvv docbook nova -i ~/nova

to generate the XML files and move those into the appropriate part of the git repo

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