diskimage-builder/elements/ironic-agent
Ben Nemec e49d347ba9 Generalize logic for skipping final image generation
Since the ironic-agent element builds the ramdisk and extracts the
kernel itself, there's no need to actually generate an image at the
end of the process.  Previously the unnecessary image was being
deleted, but this wastes a bunch of time compressing and converting
the image.  It's better to just not create the image at all.

This change adds a noop element called no-final-image that
disk-image-create looks for in the element list and, if found, will
cause it to skip the final image generation.  This is more flexible
than the previous ironic-agent-specific method that would have
required changes to disk-image-create for every element that wanted
to behave similarly.

Note that this cannot be done using an environment variable, because
element environments.d entries do not propagate out to
disk-image-create.  It also doesn't make sense as a user option
because it should be set by the element author, not the user.

Change-Id: I168feb18f0d578b3babbe4784d3ef75e755e1ebd
2016-07-28 13:14:36 -05:00
..
cleanup.d Clean more from ironic-agent ramdisk image 2016-06-24 13:21:32 -05:00
environment.d Use ironic-agent for source-repositories 2015-11-22 15:03:31 -05:00
extra-data.d Support to add certificate in ironic-agent 2016-04-14 13:42:36 +00:00
finalise.d Do not remove sudo in ironic-agent 2016-05-16 10:39:04 +10:00
install.d Add dhcp-all-interfaces.target for syncing units 2016-05-16 10:15:53 +01:00
post-install.d Merge "ironic-agent postinst fails on systemd with no iptables" 2016-04-04 19:35:42 +00:00
test-elements/build-succeeds-fedora Remove zero length files 2016-01-20 19:08:54 -05:00
element-deps Generalize logic for skipping final image generation 2016-07-28 13:14:36 -05:00
element-provides Add element for building ramdisk with ironic-python-agent 2014-11-13 19:30:44 +02:00
package-installs.yaml package-installs: add list to arch and "not-arch" list 2016-07-01 21:31:59 +02:00
pkg-map Install ironic-agent dependencies via package-installs 2015-09-21 13:10:30 +02:00
README.rst Support to add certificate in ironic-agent 2016-04-14 13:42:36 +00:00
source-repository-ironic-agent Install IPA in a virtual environment 2016-02-16 11:17:12 +00:00
svc-map [ironic-agent] Use svc-map for enabling agent 2015-09-01 07:12:52 -04:00

============
ironic-agent
============
Builds a ramdisk with ironic-python-agent.  More information can be found at:
    https://git.openstack.org/cgit/openstack/ironic-python-agent/

Beyond installing the ironic-python-agent, this element does the following:

* Installs the ``dhcp-all-interfaces`` so the node, upon booting, attempts to
  obtain an IP address on all available network interfaces.
* Disables the ``iptables`` service on SysV and systemd based systems.
* Disables the ``ufw`` service on Upstart based systems.
* Installs packages required for the operation of the ironic-python-agent::
    ``qemu-utils`` ``parted`` ``hdparm`` ``util-linux`` ``genisoimage``
* When installing from source, ``python-dev`` and ``gcc`` are also installed
  in order to support source based installation of ironic-python-agent and its
  dependencies.
* Install the certificate if any, which is set to the environment variable
  ``DIB_IPA_CERT`` for validating the authenticity by ironic-python-agent. The
  certificate can be self-signed certificate or CA certificate.

This element outputs three files:

- ``$IMAGE-NAME.initramfs``: The deploy ramdisk file containing the
  ironic-python-agent (IPA) service.
- ``$IMAGE-NAME.kernel``: The kernel binary file.
- ``$IMAGE-NAME.vmlinuz``: A hard link pointing to the ``$IMAGE-NAME.kernel``
  file; this is just a backward compatibility layer, please do not rely
  on this file.

.. note::
   The package based install currently only enables the service when using the
   systemd init system. This can easily be changed if there is an agent
   package which includes upstart or sysv packaging.

.. note::
   Using the ramdisk will require at least 1.5GB of ram