Synnefo » snf-ganeti

News

====

Version 2.5.0 beta1

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

*(unreleased)*

- 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

- 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.

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,

/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

ganeti-htools package supports the new protocol since version 0.2.4.

Another important change is increased validation of node and instance

names. This might create problems in special cases, if invalid host

names are being used.

Also, a new layer of hypervisor parameters has been added, that sits at

OS level between the cluster defaults and the instance ones. This allows

customisation of virtualization parameters depending on the installed

OS. For example instances with OS 'X' may have a different KVM kernel

(or any other parameter) than the cluster defaults. This is intended to

help managing a multiple OSes on the same cluster, without manual

modification of each instance's parameters.

A tool for merging clusters, ``cluster-merge``, has been added in the

tools sub-directory.

Bug fixes

~~~~~~~~~

- Improved the int/float conversions that should make the code more

  robust in face of errors from the node daemons

- Fixed the remove node code in case of internal configuration errors

- Fixed the node daemon behaviour in face of inconsistent queue

  directory (e.g. read-only file-system where we can't open the files

  read-write, etc.)

- Fixed the behaviour of gnt-node modify for master candidate demotion;

  now it either aborts cleanly or, if given the new "auto_promote"

  parameter, will automatically promote other nodes as needed

- Fixed compatibility with (unreleased yet) Python 2.6.5 that would

  completely prevent Ganeti from working

- Fixed bug for instance export when not all disks were successfully

  exported

- Fixed behaviour of node add when the new node is slow in starting up

  the node daemon

- Fixed handling of signals in the LUXI client, which should improve

  behaviour of command-line scripts

- Added checks for invalid node/instance names in the configuration (now

  flagged during cluster verify)

- Fixed watcher behaviour for disk activation errors

- Fixed two potentially endless loops in http library, which led to the

  RAPI daemon hanging and consuming 100% CPU in some cases

- Fixed bug in RAPI daemon related to hashed passwords

- Fixed bug for unintended qemu-level bridging of multi-NIC KVM

  instances

- Enhanced compatibility with non-Debian OSes, but not using absolute

  path in some commands and allowing customisation of the ssh

  configuration directory

- Fixed possible future issue with new Python versions by abiding to the

  proper use of ``__slots__`` attribute on classes

- Added checks that should prevent directory traversal attacks

- Many documentation fixes based on feedback from users

New features

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

- Added an "early_release" more for instance replace disks and node

  evacuate, where we release locks earlier and thus allow higher

  parallelism within the cluster

- Added watcher hooks, intended to allow the watcher to restart other

  daemons (e.g. from the ganeti-nbma project), but they can be used of

  course for any other purpose

- Added a compile-time disable for DRBD barriers, to increase

  performance if the administrator trusts the power supply or the

  storage system to not lose writes

- Added the option of using syslog for logging instead of, or in

  addition to, Ganeti's own log files

- Removed boot restriction for paravirtual NICs for KVM, recent versions

  can indeed boot from a paravirtual NIC

- Added a generic debug level for many operations; while this is not

  used widely yet, it allows one to pass the debug value all the way to

  the OS scripts

- Enhanced the hooks environment for instance moves (failovers,

  migrations) where the primary/secondary nodes changed during the

  operation, by adding {NEW,OLD}_{PRIMARY,SECONDARY} vars

- Enhanced data validations for many user-supplied values; one important

  item is the restrictions imposed on instance and node names, which

  might reject some (invalid) host names

- Add a configure-time option to disable file-based storage, if it's not

  needed; this allows greater security separation between the master

  node and the other nodes from the point of view of the inter-node RPC

  protocol

- Added user notification in interactive tools if job is waiting in the

  job queue or trying to acquire locks

- Added log messages when a job is waiting for locks

- Added filtering by node tags in instance operations which admit

  multiple instances (start, stop, reboot, reinstall)

- Added a new tool for cluster mergers, ``cluster-merge``

- Parameters from command line which are of the form ``a=b,c=d`` can now

  use backslash escapes to pass in values which contain commas,

  e.g. ``a=b\\c,d=e`` where the 'a' parameter would get the value

  ``b,c``

- For KVM, the instance name is the first parameter passed to KVM, so

  that it's more visible in the process list

Version 2.1.0

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

*(Released Tue, 2 Mar 2010)*

Ganeti 2.1 brings many improvements with it. Major changes:

- Added infrastructure to ease automated disk repairs

- Added new daemon to export configuration data in a cheaper way than

  using the remote API

- Instance NICs can now be routed instead of being associated with a

  networking bridge

- Improved job locking logic to reduce impact of jobs acquiring multiple

  locks waiting for other long-running jobs

In-depth implementation details can be found in the Ganeti 2.1 design

document.

Details

~~~~~~~

- Added chroot hypervisor

- Added more options to xen-hvm hypervisor (``kernel_path`` and

  ``device_model``)

- Added more options to xen-pvm hypervisor (``use_bootloader``,

  ``bootloader_path`` and ``bootloader_args``)

- Added the ``use_localtime`` option for the xen-hvm and kvm

  hypervisors, and the default value for this has changed to false (in

  2.0 xen-hvm always enabled it)

- Added luxi call to submit multiple jobs in one go

- Added cluster initialization option to not modify ``/etc/hosts``

  file on nodes

- Added network interface parameters

- Added dry run mode to some LUs

- Added RAPI resources:

  - ``/2/instances/[instance_name]/info``

  - ``/2/instances/[instance_name]/replace-disks``

  - ``/2/nodes/[node_name]/evacuate``