MAAS 1.6.0

1.6.0
=====

Special notice:
  Cluster interfaces now have static IP ranges in order to give nodes stable
  IP addresses. You need to set the range in each interface to turn on this
  feature. See below for details.

Major new features
------------------

IP addresses overhaul.
  This release contains a total reworking of IP address allocation. You can
  now define a separate "static" range in each cluster interface configuration
  that is separate from the DHCP server's dynamic range. Any node in use by
  a user will receive an IP address from the static range that is guaranteed
  not to change during its allocated lifetime. Previously, this was at the
  whim of the DHCP server despite MAAS placing host maps in its configuration.

  Currently, dynamic IP addresses will continue to receive DNS entries so as
  to maintain backward compatibility with installations being upgraded from
  1.5. However, this will be changed in a future release to only give
  DNS entries to static IPs.

  You can also use the API to `reserve IP addresses`_ on a per-user basis.

.. _reserve IP addresses: http://maas.ubuntu.com/docs1.6/api.html#ip-addresses

Support for additional OSes.
  MAAS can now install operating systems other than Ubuntu on nodes.
  Preliminary beta support exists for CentOS and SuSE via the `Curtin`_ "fast"
  installer. This has not been thoroughly tested yet and has been provided
  in case anyone finds this useful and is willing to help find and report bugs.

Minor notable changes
---------------------

DNS entries
  In 1.5 DNS entries for nodes were a CNAME record. As of 1.6, they are now
  all "A" records, which allows for reliable reverse look-ups.

  Only nodes that are allocated to a user and started will receive "A" record
  entries. Unallocated nodes no longer have DNS entries.

Removal of bootresources.yaml
  The bootresources.yaml file, which had to be configured separately on each
  cluster controller, is no longer in use. Instead, the configuration for
  which images to download is now held by the region controller, and defaults
  to downloading all images for LTS releases. A `rudimentary API`_ is
  available to manipulate this configuration.

.. _rudimentary API: http://maas.ubuntu.com/docs1.6/api.html#boot-source

Fast installer is now the default
  Prevously, the slower Debian installer was used by default. Any newly-
  enlisted nodes will now use the newer `fast installer`_. Existing nodes
  will keep the installer setting that they already have.

.. _fast installer: https://launchpad.net/curtin