NEWS

News
====

Version 2.5.0 beta1
-------------------

*(Released Fri, 12 Aug 2011)*

Incompatible/important changes and bugfixes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

- The default of the ``/2/instances/[instance_name]/rename`` RAPI
  resource's ``ip_check`` parameter changed from ``True`` to ``False``
  to match the underlying LUXI interface.
- The ``/2/nodes/[node_name]/evacuate`` RAPI resource was changed to use
  body parameters, see :doc:`RAPI documentation <rapi>`. The server does
  not maintain backwards-compatibility as the underlying operation
  changed in an incompatible way. The RAPI client can talk to old
  servers, but it needs to be told so as the return value changed.
- When creating file-based instances via RAPI, the ``file_driver``
  parameter no longer defaults to ``loop`` and must be specified.
- The deprecated ``bridge`` NIC parameter is no longer supported. Use
  ``link`` instead.
- Support for the undocumented and deprecated RAPI instance creation
  request format version 0 has been dropped. Use version 1, supported
  since Ganeti 2.1.3 and :doc:`documented <rapi>`, instead.
- Pyparsing 1.4.6 or above is required, see :doc:`installation
  documentation <install>`.
- The "cluster-verify" hooks are now executed per group by the
  ``OP_CLUSTER_VERIFY_GROUP`` opcode. This maintains the same behavior
  if you just run ``gnt-cluster verify``, which generates one opcode per
  group.
- The environment as passed to the OS scripts is cleared, and thus no
  environment variables defined in the node daemon's environment will be
  inherited by the scripts.
- The :doc:`iallocator <iallocator>` mode ``multi-evacuate`` has been
  deprecated.
- :doc:`New iallocator modes <design-multi-reloc>` have been added to
  support operations involving multiple node groups.
- Offline nodes are ignored when failing over an instance.

New features
~~~~~~~~~~~~

- The ganeti-htools project has been merged into the ganeti-core source
  tree and will be built as part of Ganeti (see :doc:`install-quick`).
- Implemented support for :doc:`shared storage <design-shared-storage>`.
- Add support for disks larger than 2 TB in ``lvmstrap`` by supporting
  GPT-style partition tables (requires `parted
  <http://www.gnu.org/s/parted/>`_).
- Added support for floppy drive and 2nd CD-ROM drive in KVM hypervisor.
- Allowed adding tags on instance creation.
- Export instance tags to hooks (``INSTANCE_TAGS``, see :doc:`hooks`)
- Allow instances to be started in a paused state, enabling the user to
  see the complete console output on boot using the console.
- Added new hypervisor flag to control default reboot behaviour
  (``reboot_behavior``).
- Added support for KVM keymaps (hypervisor parameter ``keymap``).
- Improved out-of-band management support:

  - Added ``gnt-node health`` command reporting the health status of
    nodes.
  - Added ``gnt-node power`` command to manage power status of nodes.
  - Added command for emergency power-off (EPO), ``gnt-cluster epo``.

- Instance migration can fall back to failover if instance is not
  running.
- Filters can be used when listing nodes, instances, groups and locks;
  see *ganeti(7)* manpage.
- Added post-execution status as variables to :doc:`hooks <hooks>`
  environment.
- Instance tags are exported/imported together with the instance.
- When given an explicit job ID, ``gnt-job info`` will work for archived
  jobs.
- Jobs can define dependencies on other jobs (not yet supported via
  RAPI or command line, but used by internal commands and usable via
  LUXI).

  - Lock monitor (``gnt-debug locks``) shows jobs waiting for
    dependencies.

- Instance failover is now available as a RAPI resource
  (``/2/instances/[instance_name]/failover``).
- ``gnt-instance info`` defaults to static information if primary node
  is offline.
- Opcodes have a new ``comment`` attribute.

Node group improvements
~~~~~~~~~~~~~~~~~~~~~~~

- ``gnt-cluster verify`` has been modified to check groups separately,
  thereby improving performance.
- Node group support has been added to ``gnt-cluster verify-disks``,
  which now operates per node group.
- Watcher has been changed to work better with node groups.

  - One process and state file per node group.
  - Slow watcher in one group doesn't block other group's watcher.

- Added new command, ``gnt-group evacuate``, to move all instances in a
  node group to other groups.
- Added ``gnt-instance change-group`` to move an instance to another
  node group.
- ``gnt-cluster command`` and ``gnt-cluster copyfile`` now support
  per-group operations.
- Node groups can be tagged.
- Some operations switch from an exclusive to a shared lock as soon as
  possible.
- Instance's primary and secondary nodes' groups are now available as
  query fields (``pnode.group``, ``pnode.group.uuid``, ``snodes.group``
  and ``snodes.group.uuid``).

Misc
~~~~

- Numerous updates to documentation and manpages.

  - :doc:`RAPI <rapi>` documentation now has detailed parameter
    descriptions.

- A lockset's internal lock is now also visible in lock monitor.
- Log messages from job queue workers now contain information about the
  opcode they're processing.
- ``gnt-instance console`` no longer requires the instance lock.
- A short delay when waiting for job changes reduces the number of LUXI
  requests significantly.
- DRBD metadata volumes are overwritten with zeros during disk creation.


Version 2.4.3
-------------

*(Released Fri, 5 Aug 2011)*

Many bug-fixes and a few small features:

- Fixed argument order in ``ReserveLV`` and ``ReserveMAC`` which caused
  issues when you tried to add an instance with two MAC addresses in one
  request
- KVM: fixed per-instance stored UID value
- KVM: configure bridged NICs at migration start
- KVM: Fix a bug where instance will not start with never KVM versions
  (>= 0.14)
- Added OS search path to ``gnt-cluster info``
- Fixed an issue with ``file_storage_dir`` where you were forced to
  provide an absolute path, but the documentation states it is a
  relative path, the documentation was right
- Added a new parameter to instance stop/start called ``--no-remember``
  that will make the state change to not be remembered
- Implemented ``no_remember`` at RAPI level
- Improved the documentation
- Node evacuation: don't call IAllocator if node is already empty
- Fixed bug in DRBD8 replace disks on current nodes
- Fixed bug in recreate-disks for DRBD instances
- Moved assertion checking locks in ``gnt-instance replace-disks``
  causing it to abort with not owning the right locks for some situation
- Job queue: Fixed potential race condition when cancelling queued jobs
- Fixed off-by-one bug in job serial generation
- ``gnt-node volumes``: Fix instance names
- Fixed aliases in bash completion
- Fixed a bug in reopening log files after beeing sent a SIGHUP
- Added a flag to burnin to allow specifying VCPU count
- Bugfixes to non-root Ganeti configuration


Version 2.4.2
-------------

*(Released Thu, 12 May 2011)*

Many bug-fixes and a few new small features:

- Fixed a bug related to log opening failures
- Fixed a bug in instance listing with orphan instances
- Fixed a bug which prevented resetting the cluster-level node parameter
  ``oob_program`` to the default
- Many fixes related to the ``cluster-merge`` tool
- Fixed a race condition in the lock monitor, which caused failures
  during (at least) creation of many instances in parallel
- Improved output for gnt-job info
- Removed the quiet flag on some ssh calls which prevented debugging
  failures
- Improved the N+1 failure messages in cluster verify by actually
  showing the memory values (needed and available)
- Increased lock attempt timeouts so that when executing long operations
  (e.g. DRBD replace-disks) other jobs do not enter 'blocking acquire'
  too early and thus prevent the use of the 'fair' mechanism
- Changed instance query data (``gnt-instance info``) to not acquire
  locks unless needed, thus allowing its use on locked instance if only
  static information is asked for
- Improved behaviour with filesystems that do not support rename on an
  opened file
- Fixed the behaviour of ``prealloc_wipe_disks`` cluster parameter which
  kept locks on all nodes during the wipe, which is unneeded
- Fixed ``gnt-watcher`` handling of errors during hooks execution
- Fixed bug in ``prealloc_wipe_disks`` with small disk sizes (less than
  10GiB) which caused the wipe to fail right at the end in some cases
- Fixed master IP activation when doing master failover with no-voting
- Fixed bug in ``gnt-node add --readd`` which allowed the re-adding of
  the master node itself
- Fixed potential data-loss in under disk full conditions, where Ganeti
  wouldn't check correctly the return code and would consider
  partially-written files 'correct'
- Fixed bug related to multiple VGs and DRBD disk replacing
- Added new disk parameter ``metavg`` that allows placement of the meta
  device for DRBD in a different volume group
- Fixed error handling in the node daemon when the system libc doesn't
  have major number 6 (i.e. if ``libc.so.6`` is not the actual libc)
- Fixed lock release during replace-disks, which kept cluster-wide locks
  when doing disk replaces with an iallocator script
- Added check for missing bridges in cluster verify
- Handle EPIPE errors while writing to the terminal better, so that
  piping the output to e.g. ``less`` doesn't cause a backtrace
- Fixed rare case where a ^C during Luxi calls could have been
  interpreted as server errors, instead of simply terminating
- Fixed a race condition in LUGroupAssignNodes (``gnt-group
  assign-nodes``)
- Added a few more parameters to the KVM hypervisor, allowing a second
  CDROM, custom disk type for CDROMs and a floppy image
- Removed redundant message in instance rename when the name is given
  already as a FQDN
- Added option to ``gnt-instance recreate-disks`` to allow creating the
  disks on new nodes, allowing recreation when the original instance
  nodes are completely gone
- Added option when converting disk templates to DRBD to skip waiting
  for the resync, in order to make the instance available sooner
- Added two new variables to the OS scripts environment (containing the
  instance's nodes)
- Made the root_path and optional parameter for the xen-pvm hypervisor,
  to allow use of ``pvgrub`` as bootloader
- Changed the instance memory modifications to only check out-of-memory
  conditions on memory increases, and turned the secondary node warnings
  into errors (they can still be overridden via ``--force``)
- Fixed the handling of a corner case when the Python installation gets
  corrupted (e.g. a bad disk) while ganeti-noded is running and we try
  to execute a command that doesn't exist
- Fixed a bug in ``gnt-instance move`` (LUInstanceMove) when the primary
  node of the instance returned failures during instance shutdown; this
  adds the option ``--ignore-consistency`` to gnt-instance move

And as usual, various improvements to the error messages, documentation
and man pages.

Version 2.4.1
-------------

*(Released Wed, 09 Mar 2011)*

Emergency bug-fix release. ``tools/cfgupgrade`` was broken and overwrote
the RAPI users file if run twice (even with ``--dry-run``).

The release fixes that bug (nothing else changed).


Version 2.4.0
-------------

*(Released Mon, 07 Mar 2011)*

Final 2.4.0 release. Just a few small fixes:

- Fixed RAPI node evacuate
- Fixed the kvm-ifup script
- Fixed internal error handling for special job cases
- Updated man page to specify the escaping feature for options


Version 2.4.0 rc3
-----------------

*(Released Mon, 28 Feb 2011)*

A critical fix for the ``prealloc_wipe_disks`` feature: it is possible
that this feature wiped the disks of the wrong instance, leading to loss
of data.

Other changes:

- Fixed title of query field containing instance name
- Expanded the glossary in the documentation
- Fixed one unittest (internal issue)


Version 2.4.0 rc2
-----------------

*(Released Mon, 21 Feb 2011)*

A number of bug fixes plus just a couple functionality changes.

On the user-visible side, the ``gnt-* list`` command output has changed
with respect to "special" field states. The current rc1 style of display
can be re-enabled by passing a new ``--verbose`` (``-v``) flag, but in
the default output mode special fields states are displayed as follows:

- Offline resource: ``*``
- Unavailable/not applicable: ``-``
- Data missing (RPC failure): ``?``
- Unknown field: ``??``

Another user-visible change is the addition of ``--force-join`` to
``gnt-node add``.

As for bug fixes:

- ``tools/cluster-merge`` has seen many fixes and is now enabled again
- Fixed regression in RAPI/instance reinstall where all parameters were
  required (instead of optional)
- Fixed ``gnt-cluster repair-disk-sizes``, was broken since Ganeti 2.2
- Fixed iallocator usage (offline nodes were not considered offline)
- Fixed ``gnt-node list`` with respect to non-vm_capable nodes
- Fixed hypervisor and OS parameter validation with respect to
  non-vm_capable nodes
- Fixed ``gnt-cluster verify`` with respect to offline nodes (mostly
  cosmetic)
- Fixed ``tools/listrunner`` with respect to agent-based usage


Version 2.4.0 rc1
-----------------

*(Released Fri,  4 Feb 2011)*

Many changes and fixes since the beta1 release. While there were some
internal changes, the code has been mostly stabilised for the RC
release.

Note: the dumb allocator was removed in this release, as it was not kept
up-to-date with the IAllocator protocol changes. It is recommended to
use the ``hail`` command from the ganeti-htools package.

Note: the 2.4 and up versions of Ganeti are not compatible with the
0.2.x branch of ganeti-htools. You need to upgrade to
ganeti-htools-0.3.0 (or later).

Regressions fixed from 2.3
~~~~~~~~~~~~~~~~~~~~~~~~~~

- Fixed the ``gnt-cluster verify-disks`` command
- Made ``gnt-cluster verify-disks`` work in parallel (as opposed to
  serially on nodes)
- Fixed disk adoption breakage
- Fixed wrong headers in instance listing for field aliases

Other bugs fixed
~~~~~~~~~~~~~~~~

- Fixed corner case in KVM handling of NICs
- Fixed many cases of wrong handling of non-vm_capable nodes
- Fixed a bug where a missing instance symlink was not possible to
  recreate with any ``gnt-*`` command (now ``gnt-instance
  activate-disks`` does it)
- Fixed the volume group name as reported by ``gnt-cluster
  verify-disks``
- Increased timeouts for the import-export code, hopefully leading to
  fewer aborts due network or instance timeouts
- Fixed bug in ``gnt-node list-storage``
- Fixed bug where not all daemons were started on cluster
  initialisation, but only at the first watcher run
- Fixed many bugs in the OOB implementation
- Fixed watcher behaviour in presence of instances with offline
  secondaries
- Fixed instance list output for instances running on the wrong node
- a few fixes to the cluster-merge tool, but it still cannot merge
  multi-node groups (currently it is not recommended to use this tool)


Improvements
~~~~~~~~~~~~

- Improved network configuration for the KVM hypervisor
- Added e1000 as a supported NIC for Xen-HVM
- Improved the lvmstrap tool to also be able to use partitions, as
  opposed to full disks
- Improved speed of disk wiping (the cluster parameter
  ``prealloc_wipe_disks``, so that it has a low impact on the total time
  of instance creations
- Added documentation for the OS parameters
- Changed ``gnt-instance deactivate-disks`` so that it can work if the
  hypervisor is not responding
- Added display of blacklisted and hidden OS information in
  ``gnt-cluster info``
- Extended ``gnt-cluster verify`` to also validate hypervisor, backend,
  NIC and node parameters, which might create problems with currently
  invalid (but undetected) configuration files, but prevents validation
  failures when unrelated parameters are modified
- Changed cluster initialisation to wait for the master daemon to become
  available
- Expanded the RAPI interface:

  - Added config redistribution resource
  - Added activation/deactivation of instance disks
  - Added export of console information

- Implemented log file reopening on SIGHUP, which allows using
  logrotate(8) for the Ganeti log files
- Added a basic OOB helper script as an example


Version 2.4.0 beta1
-------------------

*(Released Fri, 14 Jan 2011)*

User-visible
~~~~~~~~~~~~

- Fixed timezone issues when formatting timestamps
- Added support for node groups, available via ``gnt-group`` and other
  commands
- Added out-of-band framework and management, see :doc:`design
  document <design-oob>`
- Removed support for roman numbers from ``gnt-node list`` and
  ``gnt-instance list``.
- Allowed modification of master network interface via ``gnt-cluster
  modify --master-netdev``
- Accept offline secondaries while shutting down instance disks
- Added ``blockdev_prefix`` parameter to Xen PVM and HVM hypervisors
- Added support for multiple LVM volume groups
- Avoid sorting nodes for ``gnt-node list`` if specific nodes are
  requested
- Added commands to list available fields:

  - ``gnt-node list-fields``
  - ``gnt-group list-fields``
  - ``gnt-instance list-fields``

- Updated documentation and man pages

Integration
~~~~~~~~~~~

- Moved ``rapi_users`` file into separate directory, now named
  ``.../ganeti/rapi/users``, ``cfgupgrade`` moves the file and creates a
  symlink
- Added new tool for running commands on many machines,
  ``tools/ganeti-listrunner``
- Implemented more verbose result in ``OpInstanceConsole`` opcode, also
  improving the ``gnt-instance console`` output
- Allowed customisation of disk index separator at ``configure`` time
- Export node group allocation policy to :doc:`iallocator <iallocator>`
- Added support for non-partitioned md disks in ``lvmstrap``
- Added script to gracefully power off KVM instances
- Split ``utils`` module into smaller parts
- Changed query operations to return more detailed information, e.g.
  whether an information is unavailable due to an offline node. To use
  this new functionality, the LUXI call ``Query`` must be used. Field
  information is now stored by the master daemon and can be retrieved
  using ``QueryFields``. Instances, nodes and groups can also be queried
  using the new opcodes ``OpQuery`` and ``OpQueryFields`` (not yet
  exposed via RAPI). The following commands make use of this
  infrastructure change:

  - ``gnt-group list``
  - ``gnt-group list-fields``
  - ``gnt-node list``
  - ``gnt-node list-fields``
  - ``gnt-instance list``
  - ``gnt-instance list-fields``
  - ``gnt-debug locks``

Remote API
~~~~~~~~~~

- New RAPI resources (see :doc:`rapi`):

  - ``/2/modify``
  - ``/2/groups``
  - ``/2/groups/[group_name]``
  - ``/2/groups/[group_name]/assign-nodes``
  - ``/2/groups/[group_name]/modify``
  - ``/2/groups/[group_name]/rename``
  - ``/2/instances/[instance_name]/disk/[disk_index]/grow``

- RAPI changes:

  - Implemented ``no_install`` for instance creation
  - Implemented OS parameters for instance reinstallation, allowing
    use of special settings on reinstallation (e.g. for preserving data)

Misc
~~~~

- Added IPv6 support in import/export
- Pause DRBD synchronization while wiping disks on instance creation
- Updated unittests and QA scripts
- Improved network parameters passed to KVM
- Converted man pages from docbook to reStructuredText


Version 2.3.1
-------------

*(Released Mon, 20 Dec 2010)*

Released version 2.3.1~rc1 without any changes.


Version 2.3.1 rc1
-----------------

*(Released Wed, 1 Dec 2010)*

- impexpd: Disable OpenSSL compression in socat if possible (backport
  from master, commit e90739d625b, see :doc:`installation guide
  <install-quick>` for details)
- Changed unittest coverage report to exclude test scripts
- Added script to check version format


Version 2.3.0
-------------

*(Released Wed, 1 Dec 2010)*

Released version 2.3.0~rc1 without any changes.


Version 2.3.0 rc1
-----------------

*(Released Fri, 19 Nov 2010)*

A number of bugfixes and documentation updates:

- Update ganeti-os-interface documentation
- Fixed a bug related to duplicate MACs or similar items which should be
  unique
- Fix breakage in OS state modify
- Reinstall instance: disallow offline secondaries (fixes bug related to
  OS changing but reinstall failing)
- plus all the other fixes between 2.2.1 and 2.2.2


Version 2.3.0 rc0
-----------------

*(Released Tue, 2 Nov 2010)*

- Fixed clearing of the default iallocator using ``gnt-cluster modify``
- Fixed master failover race with watcher
- Fixed a bug in ``gnt-node modify`` which could lead to an inconsistent
  configuration
- Accept previously stopped instance for export with instance removal
- Simplify and extend the environment variables for instance OS scripts
- Added new node flags, ``master_capable`` and ``vm_capable``
- Added optional instance disk wiping prior during allocation. This is a
  cluster-wide option and can be set/modified using
  ``gnt-cluster {init,modify} --prealloc-wipe-disks``.
- Added IPv6 support, see :doc:`design document <design-2.3>` and
  :doc:`install-quick`
- Added a new watcher option (``--ignore-pause``)
- Added option to ignore offline node on instance start/stop
  (``--ignore-offline``)
- Allow overriding OS parameters with ``gnt-instance reinstall``
- Added ability to change node's secondary IP address using ``gnt-node
  modify``
- Implemented privilege separation for all daemons except
  ``ganeti-noded``, see ``configure`` options
- Complain if an instance's disk is marked faulty in ``gnt-cluster
  verify``
- Implemented job priorities (see ``ganeti(7)`` manpage)
- Ignore failures while shutting down instances during failover from
  offline node
- Exit daemon's bootstrap process only once daemon is ready
- Export more information via ``LUInstanceQuery``/remote API
- Improved documentation, QA and unittests
- RAPI daemon now watches ``rapi_users`` all the time and doesn't need a
  restart if the file was created or changed
- Added LUXI protocol version sent with each request and response,
  allowing detection of server/client mismatches
- Moved the Python scripts among gnt-* and ganeti-* into modules
- Moved all code related to setting up SSH to an external script,
  ``setup-ssh``
- Infrastructure changes for node group support in future versions


Version 2.2.2
-------------

*(Released Fri, 19 Nov 2010)*

A few small bugs fixed, and some improvements to the build system:

- Fix documentation regarding conversion to drbd
- Fix validation of parameters in cluster modify (``gnt-cluster modify
  -B``)
- Fix error handling in node modify with multiple changes
- Allow remote imports without checked names


Version 2.2.1
-------------

*(Released Tue, 19 Oct 2010)*

- Disable SSL session ID cache in RPC client


Version 2.2.1 rc1
-----------------

*(Released Thu, 14 Oct 2010)*

- Fix interaction between Curl/GnuTLS and the Python's HTTP server
  (thanks Apollon Oikonomopoulos!), finally allowing the use of Curl
  with GnuTLS
- Fix problems with interaction between Curl and Python's HTTP server,
  resulting in increased speed in many RPC calls
- Improve our release script to prevent breakage with older aclocal and
  Python 2.6


Version 2.2.1 rc0
-----------------

*(Released Thu, 7 Oct 2010)*

- Fixed issue 125, replace hardcoded "xenvg" in ``gnt-cluster`` with
  value retrieved from master
- Added support for blacklisted or hidden OS definitions
- Added simple lock monitor (accessible via (``gnt-debug locks``)
- Added support for -mem-path in KVM hypervisor abstraction layer
- Allow overriding instance parameters in tool for inter-cluster
  instance moves (``tools/move-instance``)
- Improved opcode summaries (e.g. in ``gnt-job list``)
- Improve consistency of OS listing by sorting it
- Documentation updates


Version 2.2.0.1
---------------

*(Released Fri, 8 Oct 2010)*

- Rebuild with a newer autotools version, to fix python 2.6 compatibility


Version 2.2.0
-------------

*(Released Mon, 4 Oct 2010)*

- Fixed regression in ``gnt-instance rename``


Version 2.2.0 rc2
-----------------

*(Released Wed, 22 Sep 2010)*

- Fixed OS_VARIANT variable for OS scripts
- Fixed cluster tag operations via RAPI
- Made ``setup-ssh`` exit with non-zero code if an error occurred
- Disabled RAPI CA checks in watcher


Version 2.2.0 rc1
-----------------

*(Released Mon, 23 Aug 2010)*

- Support DRBD versions of the format "a.b.c.d"
- Updated manpages
- Re-introduce support for usage from multiple threads in RAPI client
- Instance renames and modify via RAPI
- Work around race condition between processing and archival in job
  queue
- Mark opcodes following failed one as failed, too
- Job field ``lock_status`` was removed due to difficulties making it
  work with the changed job queue in Ganeti 2.2; a better way to monitor
  locks is expected for a later 2.2.x release
- Fixed dry-run behaviour with many commands
- Support ``ssh-agent`` again when adding nodes
- Many additional bugfixes


Version 2.2.0 rc0
-----------------

*(Released Fri, 30 Jul 2010)*

Important change: the internal RPC mechanism between Ganeti nodes has
changed from using a home-grown http library (based on the Python base
libraries) to use the PycURL library. This requires that PycURL is
installed on nodes. Please note that on Debian/Ubuntu, PycURL is linked
against GnuTLS by default. cURL's support for GnuTLS had known issues
before cURL 7.21.0 and we recommend using the latest cURL release or
linking against OpenSSL. Most other distributions already link PycURL
and cURL against OpenSSL. The command::

  python -c 'import pycurl; print pycurl.version'

can be used to determine the libraries PycURL and cURL are linked
against.

Other significant changes:

- Rewrote much of the internals of the job queue, in order to achieve
  better parallelism; this decouples job query operations from the job
  processing, and it should allow much nicer behaviour of the master
  daemon under load, and it also has uncovered some long-standing bugs
  related to the job serialisation (now fixed)
- Added a default iallocator setting to the cluster parameters,
  eliminating the need to always pass nodes or an iallocator for
  operations that require selection of new node(s)
- Added experimental support for the LXC virtualization method
- Added support for OS parameters, which allows the installation of
  instances to pass parameter to OS scripts in order to customise the
  instance
- Added a hypervisor parameter controlling the migration type (live or
  non-live), since hypervisors have various levels of reliability; this
  has renamed the 'live' parameter to 'mode'
- Added a cluster parameter ``reserved_lvs`` that denotes reserved
  logical volumes, meaning that cluster verify will ignore them and not
  flag their presence as errors
- The watcher will now reset the error count for failed instances after
  8 hours, thus allowing self-healing if the problem that caused the
  instances to be down/fail to start has cleared in the meantime
- Added a cluster parameter ``drbd_usermode_helper`` that makes Ganeti
  check for, and warn, if the drbd module parameter ``usermode_helper``
  is not consistent with the cluster-wide setting; this is needed to
  make diagnose easier of failed drbd creations
- Started adding base IPv6 support, but this is not yet
  enabled/available for use
- Rename operations (cluster, instance) will now return the new name,
  which is especially useful if a short name was passed in
- Added support for instance migration in RAPI
- Added a tool to pre-configure nodes for the SSH setup, before joining
  them to the cluster; this will allow in the future a simplified model
  for node joining (but not yet fully enabled in 2.2); this needs the
  paramiko python library
- Fixed handling of name-resolving errors
- Fixed consistency of job results on the error path
- Fixed master-failover race condition when executed multiple times in
  sequence
- Fixed many bugs related to the job queue (mostly introduced during the
  2.2 development cycle, so not all are impacting 2.1)
- Fixed instance migration with missing disk symlinks
- Fixed handling of unknown jobs in ``gnt-job archive``
- And many other small fixes/improvements

Internal changes:

- Enhanced both the unittest and the QA coverage
- Switched the opcode validation to a generic model, and extended the
  validation to all opcode parameters
- Changed more parts of the code that write shell scripts to use the
  same class for this
- Switched the master daemon to use the asyncore library for the Luxi
  server endpoint


Version 2.2.0 beta 0
--------------------

*(Released Thu, 17 Jun 2010)*

- Added tool (``move-instance``) and infrastructure to move instances
  between separate clusters (see :doc:`separate documentation
  <move-instance>` and :doc:`design document <design-2.2>`)
- Added per-request RPC timeout
- RAPI now requires a Content-Type header for requests with a body (e.g.
  ``PUT`` or ``POST``) which must be set to ``application/json`` (see
  :rfc:`2616` (HTTP/1.1), section 7.2.1)
- ``ganeti-watcher`` attempts to restart ``ganeti-rapi`` if RAPI is not
  reachable
- Implemented initial support for running Ganeti daemons as separate
  users, see configure-time flags ``--with-user-prefix`` and
  ``--with-group-prefix`` (only ``ganeti-rapi`` is supported at this
  time)
- Instances can be removed after export (``gnt-backup export
  --remove-instance``)
- Self-signed certificates generated by Ganeti now use a 2048 bit RSA
  key (instead of 1024 bit)
- Added new cluster configuration file for cluster domain secret
- Import/export now use SSL instead of SSH
- Added support for showing estimated time when exporting an instance,
  see the ``ganeti-os-interface(7)`` manpage and look for
  ``EXP_SIZE_FD``


Version 2.1.8
-------------

*(Released Tue, 16 Nov 2010)*

Some more bugfixes. Unless critical bugs occur, this will be the last
2.1 release:

- Fix case of MAC special-values
- Fix mac checker regex
- backend: Fix typo causing "out of range" error
- Add missing --units in gnt-instance list man page


Version 2.1.7
-------------

*(Released Tue, 24 Aug 2010)*

Bugfixes only:
  - Don't ignore secondary node silently on non-mirrored disk templates
    (issue 113)
  - Fix --master-netdev arg name in gnt-cluster(8) (issue 114)
  - Fix usb_mouse parameter breaking with vnc_console (issue 109)
  - Properly document the usb_mouse parameter
  - Fix path in ganeti-rapi(8) (issue 116)
  - Adjust error message when the ganeti user's .ssh directory is
    missing
  - Add same-node-check when changing the disk template to drbd


Version 2.1.6
-------------

*(Released Fri, 16 Jul 2010)*

Bugfixes only:
  - Add an option to only select some reboot types during qa/burnin.
    (on some hypervisors consequent reboots are not supported)
  - Fix infrequent race condition in master failover. Sometimes the old
    master ip address would be still detected as up for a short time
    after it was removed, causing failover to fail.
  - Decrease mlockall warnings when the ctypes module is missing. On
    Python 2.4 we support running even if no ctypes module is installed,
    but we were too verbose about this issue.
  - Fix building on old distributions, on which man doesn't have a
    --warnings option.
  - Fix RAPI not to ignore the MAC address on instance creation
  - Implement the old instance creation format in the RAPI client.


Version 2.1.5
-------------

*(Released Thu, 01 Jul 2010)*

A small bugfix release:
  - Fix disk adoption: broken by strict --disk option checking in 2.1.4
  - Fix batch-create: broken in the whole 2.1 series due to a lookup on
    a non-existing option
  - Fix instance create: the --force-variant option was ignored
  - Improve pylint 0.21 compatibility and warnings with Python 2.6
  - Fix modify node storage with non-FQDN arguments
  - Fix RAPI client to authenticate under Python 2.6 when used
    for more than 5 requests needing authentication
  - Fix gnt-instance modify -t (storage) giving a wrong error message
    when converting a non-shutdown drbd instance to plain


Version 2.1.4
-------------

*(Released Fri, 18 Jun 2010)*

A small bugfix release:

  - Fix live migration of KVM instances started with older Ganeti
    versions which had fewer hypervisor parameters
  - Fix gnt-instance grow-disk on down instances
  - Fix an error-reporting bug during instance migration
  - Better checking of the ``--net`` and ``--disk`` values, to avoid
    silently ignoring broken ones
  - Fix an RPC error reporting bug affecting, for example, RAPI client
    users
  - Fix bug triggered by different API version os-es on different nodes
  - Fix a bug in instance startup with custom hvparams: OS level
    parameters would fail to be applied.
  - Fix the RAPI client under Python 2.6 (but more work is needed to
    make it work completely well with OpenSSL)
  - Fix handling of errors when resolving names from DNS


Version 2.1.3
-------------

*(Released Thu, 3 Jun 2010)*

A medium sized development cycle. Some new features, and some
fixes/small improvements/cleanups.

Significant features
~~~~~~~~~~~~~~~~~~~~

The node deamon now tries to mlock itself into memory, unless the
``--no-mlock`` flag is passed. It also doesn't fail if it can't write
its logs, and falls back to console logging. This allows emergency
features such as ``gnt-node powercycle`` to work even in the event of a
broken node disk (tested offlining the disk hosting the node's
filesystem and dropping its memory caches; don't try this at home)

KVM: add vhost-net acceleration support. It can be tested with a new
enough version of the kernel and of qemu-kvm.

KVM: Add instance chrooting feature. If you use privilege dropping for
your VMs you can also now force them to chroot to an empty directory,
before starting the emulated guest.

KVM: Add maximum migration bandwith and maximum downtime tweaking
support (requires a new-enough version of qemu-kvm).

Cluster verify will now warn if the master node doesn't have the master
ip configured on it.

Add a new (incompatible) instance creation request format to RAPI which
supports all parameters (previously only a subset was supported, and it
wasn't possible to extend the old format to accomodate all the new
features. The old format is still supported, and a client can check for
this feature, before using it, by checking for its presence in the
``features`` RAPI resource.

Now with ancient latin support. Try it passing the ``--roman`` option to
``gnt-instance info``, ``gnt-cluster info`` or ``gnt-node list``
(requires the python-roman module to be installed, in order to work).

Other changes
~~~~~~~~~~~~~

As usual many internal code refactorings, documentation updates, and
such. Among others:

  - Lots of improvements and cleanups to the experimental Remote API
    (RAPI) client library.
  - A new unit test suite for the core daemon libraries.
  - A fix to creating missing directories makes sure the umask is not
    applied anymore. This enforces the same directory permissions
    everywhere.
  - Better handling terminating daemons with ctrl+c (used when running
    them in debugging mode).
  - Fix a race condition in live migrating a KVM instance, when stat()
    on the old proc status file returned EINVAL, which is an unexpected
    value.
  - Fixed manpage checking with newer man and utf-8 charachters. But now
    you need the en_US.UTF-8 locale enabled to build Ganeti from git.


Version 2.1.2.1
---------------

*(Released Fri, 7 May 2010)*

Fix a bug which prevented untagged KVM instances from starting.


Version 2.1.2
-------------

*(Released Fri, 7 May 2010)*

Another release with a long development cycle, during which many
different features were added.

Significant features
~~~~~~~~~~~~~~~~~~~~

The KVM hypervisor now can run the individual instances as non-root, to
reduce the impact of a VM being hijacked due to bugs in the
hypervisor. It is possible to run all instances as a single (non-root)
user, to manually specify a user for each instance, or to dynamically
allocate a user out of a cluster-wide pool to each instance, with the
guarantee that no two instances will run under the same user ID on any
given node.

An experimental RAPI client library, that can be used standalone
(without the other Ganeti libraries), is provided in the source tree as
``lib/rapi/client.py``. Note this client might change its interface in
the future, as we iterate on its capabilities.

A new command, ``gnt-cluster renew-crypto`` has been added to easily
replace the cluster's certificates and crypto keys. This might help in
case they have been compromised, or have simply expired.

A new disk option for instance creation has been added that allows one
to "adopt" currently existing logical volumes, with data
preservation. This should allow easier migration to Ganeti from
unmanaged (or managed via other software) instances.

Another disk improvement is the possibility to convert between redundant
(DRBD) and plain (LVM) disk configuration for an instance. This should
allow better scalability (starting with one node and growing the
cluster, or shrinking a two-node cluster to one node).

A new feature that could help with automated node failovers has been
implemented: if a node sees itself as offline (by querying the master
candidates), it will try to shutdown (hard) all instances and any active
DRBD devices. This reduces the risk of duplicate instances if an
external script automatically failovers the instances on such nodes. To
enable this, the cluster parameter ``maintain_node_health`` should be
enabled; in the future this option (per the name) will enable other
automatic maintenance features.

Instance export/import now will reuse the original instance
specifications for all parameters; that means exporting an instance,
deleting it and the importing it back should give an almost identical
instance. Note that the default import behaviour has changed from
before, where it created only one NIC; now it recreates the original
number of NICs.

Cluster verify has added a few new checks: SSL certificates validity,