139 lines
5.7 KiB
ReStructuredText
139 lines
5.7 KiB
ReStructuredText
===============================
|
|
Installing Ironic Python Agent!
|
|
===============================
|
|
|
|
Image Builders
|
|
==============
|
|
|
|
Unlike most other python software, you must build or download an IPA ramdisk
|
|
image before use. This is because it's not installed in an operating system,
|
|
but instead is run from within a ramdisk.
|
|
|
|
Two kinds of images are published on every commit from every branch of IPA:
|
|
|
|
* DIB_ images are suitable for production usage and can be downloaded from
|
|
https://tarballs.openstack.org/ironic-python-agent/dib/files/.
|
|
* TinyIPA_ images are suitable for CI and testing environments and can be
|
|
downloaded from
|
|
https://tarballs.openstack.org/ironic-python-agent/tinyipa/files/.
|
|
|
|
If you need to build your own image, use the tools from the
|
|
ironic-python-agent-builder_ project.
|
|
|
|
IPA Flags
|
|
=========
|
|
|
|
You can pass a variety of flags to IPA on start up to change its behavior.
|
|
|
|
* ``--standalone``: This disables the initial lookup and heartbeats to Ironic.
|
|
Lookup sends some information to Ironic in order to determine Ironic's node
|
|
UUID for the node. Heartbeat sends periodic pings to Ironic to tell Ironic
|
|
the node is still running. These heartbeats also trigger parts of the deploy
|
|
and cleaning cycles. This flag is useful for debugging IPA without an Ironic
|
|
installation.
|
|
|
|
* ``--debug``: Enables debug logging.
|
|
|
|
|
|
IPA and SSL
|
|
===========
|
|
|
|
During its operation IPA makes HTTP requests to a number of other services,
|
|
currently including
|
|
|
|
- ironic for lookup/heartbeats
|
|
- ironic-inspector to publish results of introspection
|
|
- HTTP image storage to fetch the user image to be written to the node's disk
|
|
(Object storage service or other service storing user images
|
|
when ironic is running in a standalone mode)
|
|
|
|
When these services are configured to require SSL-encrypted connections,
|
|
IPA can be configured to either properly use such secure connections or
|
|
ignore verifying such SSL connections.
|
|
|
|
Configuration mostly happens in the IPA config file
|
|
(default is ``/etc/ironic_python_agent/ironic_python_agent.conf``)
|
|
or command line arguments passed to ``ironic-python-agent``,
|
|
and it is possible to provide some options via kernel command line arguments
|
|
instead.
|
|
|
|
Available options in the ``[DEFAULT]`` config file section are:
|
|
|
|
insecure
|
|
Whether to verify server SSL certificates.
|
|
When not specified explicitly, defaults to the value of ``ipa-insecure``
|
|
kernel command line argument (converted to boolean).
|
|
The default for this kernel command line argument is taken to be ``False``.
|
|
Overriding it to ``True`` by adding ``ipa-insecure=1`` to the value of
|
|
``[pxe]pxe_append_params`` in ironic configuration file will allow running
|
|
the same IPA-based deploy ramdisk in a CI-like environment when services
|
|
are using secure HTTPS endpoints with self-signed certificates without
|
|
adding a custom CA file to the deploy ramdisk (see below).
|
|
|
|
cafile
|
|
Path to the PEM encoded Certificate Authority file.
|
|
When not specified, available system-wide list of CAs will be used to
|
|
verify server certificates.
|
|
Thus in order to use IPA with HTTPS endpoints of other services in
|
|
a secure fashion (with ``insecure`` option being ``False``, see above),
|
|
operators should either ensure that certificates of those services
|
|
are verifiable by root CAs present in the deploy ramdisk,
|
|
or add a custom CA file to the ramdisk and set this IPA option to point
|
|
to this file at ramdisk build time.
|
|
|
|
certfile
|
|
Path to PEM encoded client certificate cert file.
|
|
This option must be used when services are configured to require client
|
|
certificates on SSL-secured connections.
|
|
This cert file must be added to the deploy ramdisk and path
|
|
to it specified for IPA via this option at ramdisk build time.
|
|
This option has an effect only when the ``keyfile`` option is also set.
|
|
|
|
keyfile
|
|
Path to PEM encoded client certificate key file.
|
|
This option must be used when services are configured to require client
|
|
certificates on SSL-secured connections.
|
|
This key file must be added to the deploy ramdisk and path
|
|
to it specified for IPA via this option at ramdisk build time.
|
|
This option has an effect only when the ``certfile`` option is also set.
|
|
|
|
Currently a single set of cafile/certfile/keyfile options is used for all
|
|
HTTP requests to the other services.
|
|
|
|
Securing IPA's HTTP server itself with SSL is not yet supported in default
|
|
ramdisk builds.
|
|
|
|
Hardware Managers
|
|
=================
|
|
|
|
What is a HardwareManager?
|
|
--------------------------
|
|
Hardware managers are how IPA supports multiple different hardware platforms
|
|
in the same agent. Any action performed on hardware can be overridden by
|
|
deploying your own hardware manager.
|
|
|
|
Why build a custom HardwareManager?
|
|
-----------------------------------
|
|
Custom hardware managers allow you to include hardware-specific tools, files
|
|
and cleaning steps in the Ironic Python Agent. For example, you could include a
|
|
BIOS flashing utility and BIOS file in a custom ramdisk. Your custom
|
|
hardware manager could expose a cleaning step that calls the flashing utility
|
|
and flashes the packaged BIOS version (or even download it from a tested web
|
|
server).
|
|
|
|
How can I build a custom HardwareManager?
|
|
-----------------------------------------
|
|
Operators wishing to build their own hardware managers should reference
|
|
the documentation available at `Hardware Managers`_.
|
|
|
|
.. _Hardware Managers: https://docs.openstack.org/ironic-python-agent/latest/contributor/hardware_managers.html
|
|
.. _ironic-python-agent-builder: https://docs.openstack.org/ironic-python-agent-builder
|
|
.. _DIB: https://docs.openstack.org/ironic-python-agent-builder/latest/admin/dib.html
|
|
.. _TinyIPA: https://docs.openstack.org/ironic-python-agent-builder/latest/admin/tinyipa.html
|
|
|
|
Indices and tables
|
|
==================
|
|
|
|
* :ref:`genindex`
|
|
* :ref:`search`
|