ironic-inspector/CONTRIBUTING.rst

How To Contribute

Basics

• Our source code is hosted on OpenStack GitHub, but please do not send pull requests there.
• Please follow usual OpenStack Gerrit Workflow to submit a patch.
• Update change log in README.rst on any significant change.
• It goes without saying that any code change should by accompanied by unit tests.
• Note the branch you're proposing changes to. master is the current focus of development, use stable/VERSION for proposing an urgent fix, where VERSION is the current stable series. E.g. at the moment of writing the stable branch is stable/1.0.
• Please file a launchpad blueprint for any significant code change and a bug for any significant bug fix.

Development Environment

First of all, install tox utility. It's likely to be in your distribution repositories under name of python-tox. Alternatively, you can install it from PyPI.

Next checkout and create environments:

git clone https://github.com/openstack/ironic-inspector.git
cd ironic-inspector
tox

Repeat tox command each time you need to run tests. If you don't have Python interpreter of one of supported versions (currently 2.7 and 3.4), use -e flag to select only some environments, e.g.

tox -e py27

Note

Support for Python 3 is highly experimental, stay with Python 2 for the production environment for now.

There is a simple functional test that involves fetching the ramdisk from Github:

tox -e func

Run the service with:

.tox/py27/bin/ironic-inspector --config-file example.conf

Of course you may have to modify example.conf to match your OpenStack environment.

You can develop and test ironic-inspector using DevStack - see DevStack Support for the current status.

DevStack Support

DevStack provides a way to quickly build full OpenStack development environment with requested components. There is a plugin for installing ironic-inspector on DevStack.

Example local.conf

[[local|localrc]]
enable_service ironic ir-api ir-cond
disable_service n-net n-novnc
enable_service neutron q-svc q-agt q-dhcp q-l3 q-meta
enable_service s-proxy s-object s-container s-account
disable_service heat h-api h-api-cfn h-api-cw h-eng
disable_service cinder c-sch c-api c-vol

enable_plugin ironic-inspector https://github.com/openstack/ironic-inspector

IRONIC_BAREMETAL_BASIC_OPS=True
IRONIC_VM_COUNT=2
IRONIC_VM_SPECS_RAM=1024
IRONIC_DEPLOY_FLAVOR="fedora deploy-ironic"

IRONIC_INSPECTOR_RAMDISK_FLAVOR="fedora ironic-discoverd-ramdisk"

VIRT_DRIVER=ironic

LOGDAYS=1
LOGFILE=~/logs/stack.sh.log
SCREEN_LOGDIR=~/logs/screen

DEFAULT_INSTANCE_TYPE=baremetal
TEMPEST_ALLOW_TENANT_ISOLATION=False

Notes

• Replace "fedora" with whatever you have

• You need at least 1G of RAM for VMs, default value of 512 MB won't work

• Network configuration is pretty sensitive, better not to touch it without deep understanding

• This configuration disables Heat and Cinder, adjust it if you need these services

• Before restarting stack.sh:

  rm -rf /opt/stack/ironic-inspector

Test

There is a test script included:

source devstack/openrc admin admin
/opt/stack/ironic-inspector/devstack/exercise.sh

Usage

Start introspection for a node manually:

source devstack/openrc admin admin
openstack baremetal introspection start <UUID>

Then check status via API:

openstack baremetal introspection status <UUID>

Writing a Plugin

• ironic-inspector allows you to hook code into the data processing chain after introspection. Inherit ProcessingHook class defined in ironic_inspector.plugins.base module and overwrite any or both of the following methods:

  before_processing(introspection_data,**)

  called before any data processing, providing the raw data. Each plugin in the chain can modify the data, so order in which plugins are loaded matters here. Returns nothing.

  before_update(introspection_data,node_info,**)

  called after node is found and ports are created, but before data is updated on a node. Please refer to the docstring for details and examples.

  Note

  Keyword arguments node_patches and port_patches are also provided, but should not be used in new plugins.

  Make your plugin a setuptools entry point under ironic_inspector.hooks.processing namespace and enable it in the configuration file (processing.processing_hooks option).

• ironic-inspector allows plugins to override the action when node is not found in node cache. Write a callable with the following signature:

  (introspection_data,**)

  called when node is not found in cache, providing the processed data. Should return a NodeInfo class instance.

  Make your plugin a setuptools entry point under ironic_inspector.hooks.node_not_found namespace and enable it in the configuration file (processing.node_not_found_hook option).

• ironic-inspector allows more condition types to be added for Introspection Rules. Inherit RuleConditionPlugin class defined in ironic_inspector.plugins.base module and overwrite at least the following method:

  check(node_info,field,params,**)

  called to check that condition holds for a given field. Field value is provided as field argument, params is a dictionary defined at the time of condition creation. Returns boolean value.

  The following methods and attributes may also be overridden:

  validate(params,**)

  called to validate parameters provided during condition creating. Default implementation requires keys listed in REQUIRED_PARAMS (and only them).

  REQUIRED_PARAMS

  contains set of required parameters used in the default implementation of validate method, defaults to value parameter.

  ALLOW_NONE

  if it's set to True, missing fields will be passed as None values instead of failing the condition. Defaults to False.

  Make your plugin a setuptools entry point under ironic_inspector.rules.conditions namespace.

• ironic-inspector allows more action types to be added for Introspection Rules. Inherit RuleActionPlugin class defined in ironic_inspector.plugins.base module and overwrite at least the following method:

  apply(node_info,params,**)

  called to apply the action.

  The following methods and attributes may also be overridden:

  rollback(node_info,params,**)

  called to clean up when conditions were not met. Default implementation does nothing.

  validate(params,**)

  called to validate parameters provided during actions creating. Default implementation requires keys listed in REQUIRED_PARAMS (and only them).

  REQUIRED_PARAMS

  contains set of required parameters used in the default implementation of validate method, defaults to no parameters.

  Make your plugin a setuptools entry point under ironic_inspector.rules.conditions namespace.

Note

** argument is needed so that we can add optional arguments without breaking out-of-tree plugins. Please make sure to include and ignore it.

Adding migrations to the database

In order to make any changes to the database, you must add a new migration. This can be done using alembic:

alembic --config ironic_inspector/alembic.ini revision -m "A short description"

This will generate an empty migration file, with the correct revision information already included. In this file there are two functions:

• upgrade - The upgrade function is run when

  ironic-inspector-dbsync upgrade is run, and should be populated with code to bring the database up to its new state from the state it was in after the last migration.

• downgrade - The downgrade function should have code to undo the actions which

  upgrade performs, returning the database to the state it would have been in before the migration ran.

For further information on creating a migration, refer to Create a Migration Script from the alembic documentation.