Synnefo » snf-ganeti » ganeti-local

News

====

Version 2.6.0 rc1

-----------------

*(Released Mon, 25 Jun 2012)*

New features

~~~~~~~~~~~~

Instance run status

+++++++++++++++++++

The current ``admin_up`` field, which used to denote whether an instance

should be running or not, has been removed. Instead, ``admin_state`` is

introduced, with 3 possible values -- ``up``, ``down`` and ``offline``.

The rational behind this is that an instance being “down” can have

different meanings:

- it could be down during a reboot

- it could be temporarily be down for a reinstall

- or it could be down because it is deprecated and kept just for its

  disk

The previous Boolean state was making it difficult to do capacity

calculations: should Ganeti reserve memory for a down instance? Now, the

tri-state field makes it clear:

- in ``up`` and ``down`` state, all resources are reserved for the

  instance, and it can be at any time brought up if it is down

- in ``offline`` state, only disk space is reserved for it, but not

  memory or CPUs

The field can have an extra use: since the transition between ``up`` and

``down`` and vice-versus is done via ``gnt-instance start/stop``, but

transition between ``offline`` and ``down`` is done via ``gnt-instance

modify``, it is possible to given different rights to users. For

example, owners of an instance could be allowed to start/stop it, but

not transition it out of the offline state.

Instance policies and specs

+++++++++++++++++++++++++++

In previous Ganeti versions, an instance creation request was not

limited on the minimum size and on the maximum size just by the cluster

resources. As such, any policy could be implemented only in third-party

clients (RAPI clients, or shell wrappers over ``gnt-*``

tools). Furthermore, calculating cluster capacity via ``hspace`` again

required external input with regards to instance sizes.

In order to improve these workflows and to allow for example better

per-node group differentiation, we introduced instance specs, which

allow declaring:

- minimum instance disk size, disk count, memory size, cpu count

- maximum values for the above metrics

- and “standard” values (used in ``hspace`` to calculate the standard

  sized instances)

The minimum/maximum values can be also customised at node-group level,

for example allowing more powerful hardware to support bigger instance

memory sizes.

Beside the instance specs, there are a few other settings belonging to

the instance policy framework. It is possible now to customise, per

cluster and node-group:

- the list of allowed disk templates

- the maximum ratio of VCPUs per PCPUs (to control CPU oversubscription)

- the maximum ratio of instance to spindles (see below for more

  information) for local storage

All these together should allow all tools that talk to Ganeti to know

what are the ranges of allowed values for instances and the

over-subscription that is allowed.

For the VCPU/PCPU ratio, we already have the VCPU configuration from the

instance configuration, and the physical CPU configuration from the

node. For the spindle ratios however, we didn't track before these

values, so new parameters have been added:

- a new node parameter ``spindle_count``, defaults to 1, customisable at

  node group or node level

- at new backend parameter (for instances), ``spindle_use`` defaults to 1

Note that spindles in this context doesn't need to mean actual

mechanical hard-drives; it's just a relative number for both the node

I/O capacity and instance I/O consumption.

Instance migration behaviour

++++++++++++++++++++++++++++

While live-migration is in general desirable over failover, it is

possible that for some workloads it is actually worse, due to the

variable time of the “suspend” phase during live migration.

To allow the tools to work consistently over such instances (without

having to hard-code instance names), a new backend parameter

``always_failover`` has been added to control the migration/failover

behaviour. When set to True, all migration requests for an instance will

instead fall-back to failover.

Instance memory ballooning

++++++++++++++++++++++++++

Initial support for memory ballooning has been added. The memory for an

instance is no longer fixed (backend parameter ``memory``), but instead

can vary between minimum and maximum values (backend parameters

``minmem`` and ``maxmem``). Currently we only change an instance's

memory when:

- live migrating or failing over and instance and the target node

  doesn't have enough memory

- user requests changing the memory via ``gnt-instance modify

  --runtime-memory``

Instance CPU pinning

++++++++++++++++++++

In order to control the use of specific CPUs by instance, support for

controlling CPU pinning has been added for the Xen, HVM and LXC

hypervisors. This is controlled by a new hypervisor parameter

``cpu_mask``; details about possible values for this are in the

:manpage:`gnt-instance(8)`. Note that use of the most specific (precise

VCPU-to-CPU mapping) form will work well only when all nodes in your

cluster have the same amount of CPUs.

Disk parameters

+++++++++++++++

Another area in which Ganeti was not customisable were the parameters

used for storage configuration, e.g. how many stripes to use for LVM,

DRBD resync configuration, etc.

To improve this area, we've added disks parameters, which are

customisable at cluster and node group level, and which allow to

specify various parameters for disks (DRBD has the most parameters

currently), for example:

- DRBD resync algorithm and parameters (e.g. speed)

- the default VG for meta-data volumes for DRBD

- number of stripes for LVM (plain disk template)

- the RBD pool

These parameters can be modified via ``gnt-cluster modify -D …`` and

``gnt-group modify -D …``, and are used at either instance creation (in

case of LVM stripes, for example) or at disk “activation” time

(e.g. resync speed).

Rados block device support

++++++++++++++++++++++++++

A Rados (http://ceph.com/wiki/Rbd) storage backend has been added,

denoted by the ``rbd`` disk template type. This is considered

experimental, feedback is welcome. For details on configuring it, see

the :doc:`install` document and the :manpage:`gnt-cluster(8)` man page.

Master IP setup

+++++++++++++++

The existing master IP functionality works well only in simple setups (a

single network shared by all nodes); however, if nodes belong to

different networks, then the ``/32`` setup and lack of routing

information is not enough.

To allow the master IP to function well in more complex cases, the

system was reworked as follows:

- a master IP netmask setting has been added

- the master IP activation/turn-down code was moved from the node daemon

  to a separate script

- whether to run the Ganeti-supplied master IP script or a user-supplied

  on is a ``gnt-cluster init`` setting

Details about the location of the standard and custom setup scripts are

in the man page :manpage:`gnt-cluster(8)`; for information about the

setup script protocol, look at the Ganeti-supplied script.

SPICE support

+++++++++++++

The `SPICE <http://www.linux-kvm.org/page/SPICE>`_ support has been

improved.

It is now possible to use TLS-protected connections, and when renewing

or changing the cluster certificates (via ``gnt-cluster renew-crypto``,

it is now possible to specify spice or spice CA certificates. Also, it

is possible to configure a password for SPICE sessions via the

hypervisor parameter ``spice_password_file``.

There are also new parameters to control the compression and streaming

options (e.g. ``spice_image_compression``, ``spice_streaming_video``,

etc.). For details, see the man page :manpage:`gnt-instance(8)` and look

for the spice parameters.

Lastly, it is now possible to see the SPICE connection information via

``gnt-instance console``.

OVF converter

+++++++++++++

A new tool (``tools/ovfconverter``) has been added that supports

conversion between Ganeti and the `Open Virtualization Format

<http://en.wikipedia.org/wiki/Open_Virtualization_Format>`_ (both to and

from).

This relies on the ``qemu-img`` tool to convert the disk formats, so the

actual compatibility with other virtualization solutions depends on it.

Confd daemon changes

++++++++++++++++++++

The configuration query daemon (``ganeti-confd``) is now optional, and

has been rewritten in Haskell; whether to use the daemon at all, use the

Python (default) or the Haskell version is selectable at configure time

via the ``--enable-confd`` parameter, which can take one of the

``haskell``, ``python`` or ``no`` values. If not used, disabling the

daemon will result in a smaller footprint; for larger systems, we

welcome feedback on the Haskell version which might become the default

in future versions.

User interface changes

~~~~~~~~~~~~~~~~~~~~~~

We have replaced the ``--disks`` option of ``gnt-instance

replace-disks`` with a more flexible ``--disk`` option, which allows

adding and removing disks at arbitrary indices (Issue 188). Furthermore,

disk size and mode can be changed upon recreation (via ``gnt-instance

recreate-disks``, which accepts the same ``--disk`` option).

As many people are used to a ``show`` command, we have added that as an

alias to ``info`` on all ``gnt-*`` commands.

The ``gnt-instance grow-disk`` command has a new mode in which it can

accept the target size of the disk, instead of the delta; this can be

more safe since two runs in absolute mode will be idempotent, and

sometimes it's also easier to specify the desired size directly.

API changes

~~~~~~~~~~~

RAPI coverage has improved, with (for example) new resources for

recreate-disks, node power-cycle, etc.

Compatibility

~~~~~~~~~~~~~

There is partial support for ``xl`` in the Xen hypervisor; feedback is

welcome.

Python 2.7 is better supported, and after Ganeti 2.6 we will investigate

whether to still support Python 2.4 or move to Python 2.6 as minimum

required version.

Support for Fedora has been slightly improved; the provided example

init.d script should work better on it and the INSTALL file should

document the needed dependencies.

Internal changes

~~~~~~~~~~~~~~~~

The deprecated ``QueryLocks`` LUXI request has been removed. Use

``Query(what=QR_LOCK, ...)`` instead.

The LUXI requests :pyeval:`luxi.REQ_QUERY_JOBS`,

:pyeval:`luxi.REQ_QUERY_INSTANCES`, :pyeval:`luxi.REQ_QUERY_NODES`,

:pyeval:`luxi.REQ_QUERY_GROUPS`, :pyeval:`luxi.REQ_QUERY_EXPORTS` and

:pyeval:`luxi.REQ_QUERY_TAGS` are deprecated and will be removed in a

future version. :pyeval:`luxi.REQ_QUERY` should be used instead.

RAPI client: ``CertificateError`` now derives from

``GanetiApiError``. This should make it more easy to handle Ganeti

errors.

Deprecation warnings due to PyCrypto/paramiko import in

``tools/setup-ssh`` have been silenced, as usually they are safe; please

make sure to run an up-to-date paramiko version, if you use this tool.

The QA scripts now depend on Python 2.5 or above (the main code base

still works with Python 2.4).

The configuration file (``config.data``) is now written without

indentation for performance reasons; if you want to edit it, it can be

re-formatted via ``tools/fmtjson``.

A number of bugs has been fixed in the cluster merge tool.

``x509`` certification verification (used in import-export) has been

changed to allow the same clock skew as permitted by the cluster

verification. This will remove some rare but hard to diagnose errors in

import-export.

Version 2.6.0 beta2

-------------------

*(Released Mon, 11 Jun 2012)*

Second beta release of 2.6. The following changes were done from beta2

to rc1:

- Fixed ``daemon-util`` with non-root user models

- Fixed creation of plain instances with ``--no-wait-for-sync``

- Fix wrong iv_names when running ``cfgupgrade``

- Export more information in RAPI group queries

- Fixed bug when changing instance network interfaces

- Extended burnin to do NIC changes

- query: Added ``<``, ``>``, ``<=``, ``>=`` comparison operators

- Changed default for DRBD barriers

- Fixed DRBD error reporting for syncer rate

- Verify the options on disk parameters

And of course various fixes to documentation and improved unittests and

QA.

Version 2.6.0 beta1

-------------------

*(Released Wed, 23 May 2012)*

First beta release of 2.6. The following changes were done from beta1 to

beta2:

- integrated patch for distributions without ``start-stop-daemon``

- adapted example init.d script to work on Fedora

- fixed log handling in Haskell daemons

- adapted checks in the watcher for pycurl linked against libnss

- add partial support for ``xl`` instead of ``xm`` for Xen

- fixed a type issue in cluster verification

- fixed ssconf handling in the Haskell code (was breaking confd in IPv6

  clusters)

Plus integrated fixes from the 2.5 branch:

- fixed ``kvm-ifup`` to use ``/bin/bash``

- fixed parallel build failures

- KVM live migration when using a custom keymap

Version 2.5.1

-------------

*(Released Fri, 11 May 2012)*

A small bugfix release.

The main issues solved are on the topic of compatibility with newer LVM

releases:

- fixed parsing of ``lv_attr`` field

- adapted to new ``vgreduce --removemissing`` behaviour where sometimes

  the ``--force`` flag is needed

Also on the topic of compatibility, ``tools/lvmstrap`` has been changed

to accept kernel 3.x too (was hardcoded to 2.6.*).

A regression present in 2.5.0 that broke handling (in the gnt-* scripts)

of hook results and that also made display of other errors suboptimal

was fixed; the code behaves now like 2.4 and earlier.

Another change in 2.5, the cleanup of the OS scripts environment, is too

aggressive: it removed even the ``PATH`` variable, which requires the OS

scripts to *always* need to export it. Since this is a bit too strict,

we now export a minimal PATH, the same that we export for hooks.

The fix for issue 201 (Preserve bridge MTU in KVM ifup script) was

integrated into this release.

Finally, a few other miscellaneous changes were done (no new features,

just small improvements):

- Fix ``gnt-group --help`` display

- Fix hardcoded Xen kernel path

- Fix grow-disk handling of invalid units

- Update synopsis for ``gnt-cluster repair-disk-sizes``

- Accept both PUT and POST in noded (makes future upgrade to 2.6 easier)

Version 2.5.0

-------------

*(Released Thu, 12 Apr 2012)*

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.

- Support for KVM version 1.0, which changed the version reporting format

  from 3 to 2 digits.

- TCP/IP ports used by DRBD disks are returned to a pool upon instance

  removal.

- ``Makefile`` is now compatible with Automake 1.11.2

- Includes all bugfixes made in the 2.4 series

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.

- Added basic SPICE support to KVM hypervisor.

- ``tools/ganeti-listrunner`` allows passing of arguments to executable.

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.

  - Some opcode/job results are now also documented, see :doc:`RAPI

    <rapi>`.

- 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.

- Out-of-band commands no longer acquire the cluster lock in exclusive

  mode.

- ``devel/upload`` now uses correct permissions for directories.

Version 2.5.0 rc6

-----------------

*(Released Fri, 23 Mar 2012)*

This was the sixth release candidate of the 2.5 series.

Version 2.5.0 rc5

-----------------

*(Released Mon, 9 Jan 2012)*

This was the fifth release candidate of the 2.5 series.

Version 2.5.0 rc4

-----------------

*(Released Thu, 27 Oct 2011)*

This was the fourth release candidate of the 2.5 series.

Version 2.5.0 rc3

-----------------

*(Released Wed, 26 Oct 2011)*

This was the third release candidate of the 2.5 series.

Version 2.5.0 rc2

-----------------

*(Released Tue, 18 Oct 2011)*

This was the second release candidate of the 2.5 series.

Version 2.5.0 rc1

-----------------

*(Released Tue, 4 Oct 2011)*

This was the first release candidate of the 2.5 series.

Version 2.5.0 beta3

-------------------

*(Released Wed, 31 Aug 2011)*

This was the third beta release of the 2.5 series.

Version 2.5.0 beta2

-------------------

*(Released Mon, 22 Aug 2011)*

This was the second beta release of the 2.5 series.

Version 2.5.0 beta1

-------------------

*(Released Fri, 12 Aug 2011)*

This was the first beta release of the 2.5 series.

Version 2.4.5

-------------

*(Released Thu, 27 Oct 2011)*

- Fixed bug when parsing command line parameter values ending in

  backslash

- Fixed assertion error after unclean master shutdown

- Disable HTTP client pool for RPC, significantly reducing memory usage

  of master daemon

- Fixed queue archive creation with wrong permissions

Version 2.4.4

-------------

*(Released Tue, 23 Aug 2011)*

Small bug-fixes:

- Fixed documentation for importing with ``--src-dir`` option

- Fixed a bug in ``ensure-dirs`` with queue/archive permissions

- Fixed a parsing issue with DRBD 8.3.11 in the Linux kernel

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 being 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 beta0

-------------------

*(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,

/etc/hosts consistency across the cluster, etc.

Other changes

~~~~~~~~~~~~~

As usual, many internal changes were done, documentation fixes,

etc. Among others:

- Fixed cluster initialization with disabled cluster storage (regression

  introduced in 2.1.1)

- File-based storage supports growing the disks

- Fixed behaviour of node role changes

- Fixed cluster verify for some corner cases, plus a general rewrite of

  cluster verify to allow future extension with more checks

- Fixed log spamming by watcher and node daemon (regression introduced

  in 2.1.1)

- Fixed possible validation issues when changing the list of enabled

  hypervisors

- Fixed cleanup of /etc/hosts during node removal

- Fixed RAPI response for invalid methods

- Fixed bug with hashed passwords in ``ganeti-rapi`` daemon

- Multiple small improvements to the KVM hypervisor (VNC usage, booting

  from ide disks, etc.)

- Allow OS changes without re-installation (to record a changed OS

  outside of Ganeti, or to allow OS renames)

- Allow instance creation without OS installation (useful for example if

  the OS will be installed manually, or restored from a backup not in

  Ganeti format)

- Implemented option to make cluster ``copyfile`` use the replication

  network

- Added list of enabled hypervisors to ssconf (possibly useful for

  external scripts)

- Added a new tool (``tools/cfgupgrade12``) that allows upgrading from

  1.2 clusters

- A partial form of node re-IP is possible via node readd, which now

  allows changed node primary IP

- Command line utilities now show an informational message if the job is

  waiting for a lock

- The logs of the master daemon now show the PID/UID/GID of the

  connected client

Version 2.1.1

-------------

*(Released Fri, 12 Mar 2010)*

During the 2.1.0 long release candidate cycle, a lot of improvements and

changes have accumulated with were released later as 2.1.1.

Major changes

~~~~~~~~~~~~~

The node evacuate command (``gnt-node evacuate``) was significantly

rewritten, and as such the IAllocator protocol was changed - a new

request type has been added. This unfortunate change during a stable

series is designed to improve performance of node evacuations; on

clusters with more than about five nodes and which are well-balanced,

evacuation should proceed in parallel for all instances of the node

being evacuated. As such, any existing IAllocator scripts need to be

updated, otherwise the above command will fail due to the unknown

request. The provided "dumb" allocator has not been updated; but the