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News
====
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Version 2.1.0
-------------

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

Detailed 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 luxi call to submit multiple jobs in one go
- Added cluster initialization time 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``
  - ``/2/nodes/[node_name]/migrate``
  - ``/2/nodes/[node_name]/role``
  - ``/2/nodes/[node_name]/storage``
  - ``/2/nodes/[node_name]/storage/modify``
  - ``/2/nodes/[node_name]/storage/repair``

- Added OpCodes to evacuate or migrate all instances on a node
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- Added new command to list storage elements on nodes (``gnt-node
  list-storage``) and modify them (``gnt-node modify-storage``)
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- Added new ssconf files with master candidate IP address
  (``ssconf_master_candidates_ips``), node primary IP address
  (``ssconf_node_primary_ips``) and node secondary IP address
  (``ssconf_node_secondary_ips``)
- Added ``ganeti-confd`` and a client library to query the Ganeti
  configuration via UDP
- Added ability to run hooks after cluster initialization and before
  cluster destruction
- Added automatic mode for disk replace (``gnt-instance replace-disks
  --auto``)
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- Added ``gnt-instance recreate-disks`` to re-create (empty) disks
  after catastrophic data-loss
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- Added ``gnt-node repair-storage`` command to repair damaged LVM volume
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  groups
- Added ``gnt-instance move`` command to move instances
- Added ``gnt-cluster watcher`` command to control watcher
- Added ``gnt-node powercycle`` command to powercycle nodes
- Added new job status field ``lock_status``
- Added parseable error codes to cluster verification (``gnt-cluster
  verify --error-codes``) and made output less verbose (use
  ``--verbose`` to restore previous behaviour)
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- Added UUIDs to the main config entities (cluster, nodes, instances)
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- Added support for OS variants
- Added more unittests
- Fixed critical bug in ganeti-masterd startup
- Pass ``INSTANCE_REINSTALL`` variable to OS installation script when
  reinstalling an instance
- Converted to Sphinx (http://sphinx.pocoo.org/) for documentation
- Many documentation updates
- Distribute hypervisor files on ``gnt-cluster redist-conf``
- ``gnt-instance reinstall`` can now reinstall multiple instances
- Updated many command line parameters
- Introduced new OS API version 15
- No longer support a default hypervisor
- Treat virtual LVs as inexistent
- Improved job locking logic to reduce lock contention
- Match instance and node names case insensitively
- Reimplemented bash completion script to be more complete
- Improved burnin
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- Added option to specify maximum timeout on instance shutdown
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- Added ``--no-ssh-init`` option to ``gnt-cluster init``
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Version 2.0.4
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-------------

- Fixed many wrong messages
- Fixed a few bugs related to the locking library
- Fixed MAC checking at instance creation time
- Fixed a DRBD parsing bug related to gaps in /proc/drbd
- Fixed a few issues related to signal handling in both daemons and
  scripts
- Fixed the example startup script provided
- Fixed insserv dependencies in the example startup script (patch from
  Debian)
- Fixed handling of drained nodes in the iallocator framework
- Fixed handling of KERNEL_PATH parameter for xen-hvm (Debian bug
  #528618)
- Fixed error related to invalid job IDs in job polling
- Fixed job/opcode persistence on unclean master shutdown
- Fixed handling of partial job processing after unclean master
  shutdown
- Fixed error reporting from LUs, previously all errors were converted
  into execution errors
- Fixed error reporting from burnin
- Decreased significantly the memory usage of the job queue
- Optimised slightly multi-job submission
- Optimised slightly opcode loading
- Backported the multi-job submit framework from the development
  branch; multi-instance start and stop should be faster
- Added script to clean archived jobs after 21 days; this will reduce
  the size of the queue directory
- Added some extra checks in disk size tracking
- Added an example ethers hook script
- Added a cluster parameter that prevents Ganeti from modifying of
  /etc/hosts
- Added more node information to RAPI responses
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- Added a ``gnt-job watch`` command that allows following the ouput of a
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  job
- Added a bind-address option to ganeti-rapi
- Added more checks to the configuration verify
- Enhanced the burnin script such that some operations can be retried
  automatically
- Converted instance reinstall to multi-instance model
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Version 2.0.3
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-------------

- Added ``--ignore-size`` to the ``gnt-instance activate-disks`` command
  to allow using the pre-2.0.2 behaviour in activation, if any existing
  instances have mismatched disk sizes in the configuration
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- Added ``gnt-cluster repair-disk-sizes`` command to check and update
  any configuration mismatches for disk sizes
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- Added ``gnt-master cluste-failover --no-voting`` to allow master
  failover to work on two-node clusters
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- Fixed the ``--net`` option of ``gnt-backup import``, which was
  unusable
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- Fixed detection of OS script errors in ``gnt-backup export``
- Fixed exit code of ``gnt-backup export``

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Version 2.0.2
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-------------

- Added experimental support for stripped logical volumes; this should
  enhance performance but comes with a higher complexity in the block
  device handling; stripping is only enabled when passing
  ``--with-lvm-stripecount=N`` to ``configure``, but codepaths are
  affected even in the non-stripped mode
- Improved resiliency against transient failures at the end of DRBD
  resyncs, and in general of DRBD resync checks
- Fixed a couple of issues with exports and snapshot errors
- Fixed a couple of issues in instance listing
- Added display of the disk size in ``gnt-instance info``
- Fixed checking for valid OSes in instance creation
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- Fixed handling of the "vcpus" parameter in instance listing and in
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  general of invalid parameters
- Fixed http server library, and thus RAPI, to handle invalid
  username/password combinations correctly; this means that now they
  report unauthorized for queries too, not only for modifications,
  allowing earlier detect of configuration problems
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- Added a new "role" node list field, equivalent to the master/master
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  candidate/drained/offline flags combinations
- Fixed cluster modify and changes of candidate pool size
- Fixed cluster verify error messages for wrong files on regular nodes
- Fixed a couple of issues with node demotion from master candidate role
- Fixed node readd issues
- Added non-interactive mode for ``ganeti-masterd --no-voting`` startup
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- Added a new ``--no-voting`` option for masterfailover to fix failover
  on two-nodes clusters when the former master node is unreachable
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- Added instance reinstall over RAPI

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Version 2.0.1
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-------------

- added ``-H``/``-B`` startup parameters to ``gnt-instance``, which will
  allow re-adding the start in single-user option (regression from 1.2)
- the watcher writes the instance status to a file, to allow monitoring
  to report the instance status (from the master) based on cached
  results of the watcher's queries; while this can get stale if the
  watcher is being locked due to other work on the cluster, this is
  still an improvement
- the watcher now also restarts the node daemon and the rapi daemon if
  they died
- fixed the watcher to handle full and drained queue cases
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- hooks export more instance data in the environment, which helps if
  hook scripts need to take action based on the instance's properties
  (no longer need to query back into ganeti)
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- instance failovers when the instance is stopped do not check for free
  RAM, so that failing over a stopped instance is possible in low memory
  situations
- rapi uses queries for tags instead of jobs (for less job traffic), and
  for cluster tags it won't talk to masterd at all but read them from
  ssconf
- a couple of error handling fixes in RAPI
- drbd handling: improved the error handling of inconsistent disks after
  resync to reduce the frequency of "there are some degraded disks for
  this instance" messages
- fixed a bug in live migration when DRBD doesn't want to reconnect (the
  error handling path called a wrong function name)

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Version 2.0.0 final
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-------------------

- no changes from rc5

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Version 2.0 release candidate 5
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-------------------------------

- fix a couple of bugs (validation, argument checks)
- fix ``gnt-cluster getmaster`` on non-master nodes (regression)
- some small improvements to RAPI and IAllocator
- make watcher automatically start the master daemon if down

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Version 2.0 release candidate 4
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-------------------------------

- change the OS list to not require locks; this helps with big clusters
- fix ``gnt-cluster verify`` and ``gnt-cluster verify-disks`` when the
  volume group is broken
- ``gnt-instance info``, without any arguments, doesn't run for all
  instances anymore; either pass ``--all`` or pass the desired
  instances; this helps against mistakes on big clusters where listing
  the information for all instances takes a long time
- miscellaneous doc and man pages fixes

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Version 2.0 release candidate 3
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-------------------------------

- Change the internal locking model of some ``gnt-node`` commands, in
  order to reduce contention (and blocking of master daemon) when
  batching many creation/reinstall jobs
- Fixes to Xen soft reboot
- No longer build documentation at build time, instead distribute it in
  the archive, in order to reduce the need for the whole docbook/rst
  toolchains

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Version 2.0 release candidate 2
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-------------------------------

- Now the cfgupgrade scripts works and can upgrade 1.2.7 clusters to 2.0
- Fix watcher startup sequence, improves the behaviour of busy clusters
- Some other fixes in ``gnt-cluster verify``, ``gnt-instance
  replace-disks``, ``gnt-instance add``, ``gnt-cluster queue``, KVM VNC
  bind address and other places
- Some documentation fixes and updates

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Version 2.0 release candidate 1
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-------------------------------

- More documentation updates, now all docs should be more-or-less
  up-to-date
- A couple of small fixes (mixed hypervisor clusters, offline nodes,
  etc.)
- Added a customizable HV_KERNEL_ARGS hypervisor parameter (for Xen PVM
  and KVM)
- Fix an issue related to $libdir/run/ganeti and cluster creation

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Version 2.0 beta 2
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------------------

- Xen PVM and KVM have switched the default value for the instance root
  disk to the first partition on the first drive, instead of the whole
  drive; this means that the OS installation scripts must be changed
  accordingly
- Man pages have been updated
- RAPI has been switched by default to HTTPS, and the exported functions
  should all work correctly
- RAPI v1 has been removed
- Many improvements to the KVM hypervisor
- Block device errors are now better reported
- Many other bugfixes and small improvements

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Version 2.0 beta 1
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------------------

- Version 2 is a general rewrite of the code and therefore the
  differences are too many to list, see the design document for 2.0 in
  the ``doc/`` subdirectory for more details
- In this beta version there is not yet a migration path from 1.2 (there
  will be one in the final 2.0 release)
- A few significant changes are:

  - all commands are executed by a daemon (``ganeti-masterd``) and the
    various ``gnt-*`` commands are just front-ends to it
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  - all the commands are entered into, and executed from a job queue,
    see the ``gnt-job(8)`` manpage
  - the RAPI daemon supports read-write operations, secured by basic
    HTTP authentication on top of HTTPS
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  - DRBD version 0.7 support has been removed, DRBD 8 is the only
    supported version (when migrating from Ganeti 1.2 to 2.0, you need
    to migrate to DRBD 8 first while still running Ganeti 1.2)
  - DRBD devices are using statically allocated minor numbers, which
    will be assigned to existing instances during the migration process
  - there is support for both Xen PVM and Xen HVM instances running on
    the same cluster
  - KVM virtualization is supported too
  - file-based storage has been implemented, which means that it is
    possible to run the cluster without LVM and DRBD storage, for
    example using a shared filesystem exported from shared storage (and
    still have live migration)

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Version 1.2.7
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-------------

- Change the default reboot type in ``gnt-instance reboot`` to "hard"
- Reuse the old instance mac address by default on instance import, if
  the instance name is the same.
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- Handle situations in which the node info rpc returns incomplete
  results (issue 46)
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- Add checks for tcp/udp ports collisions in ``gnt-cluster verify``
- Improved version of batcher:

  - state file support
  - instance mac address support
  - support for HVM clusters/instances

- Add an option to show the number of cpu sockets and nodes in
  ``gnt-node list``
- Support OSes that handle more than one version of the OS api (but do
  not change the current API in any other way)
- Fix ``gnt-node migrate``
- ``gnt-debug`` man page
- Fixes various more typos and small issues
- Increase disk resync maximum speed to 60MB/s (from 30MB/s)

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Version 1.2.6
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-------------

- new ``--hvm-nic-type`` and ``--hvm-disk-type`` flags to control the
  type of disk exported to fully virtualized instances.
- provide access to the serial console of HVM instances
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- instance auto_balance flag, set by default. If turned off it will
  avoid warnings on cluster verify if there is not enough memory to fail
  over an instance. in the future it will prevent automatically failing
  it over when we will support that.
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- batcher tool for instance creation, see ``tools/README.batcher``
- ``gnt-instance reinstall --select-os`` to interactively select a new
  operating system when reinstalling an instance.
- when changing the memory amount on instance modify a check has been
  added that the instance will be able to start. also warnings are
  emitted if the instance will not be able to fail over, if auto_balance
  is true.
- documentation fixes
- sync fields between ``gnt-instance list/modify/add/import``
- fix a race condition in drbd when the sync speed was set after giving
  the device a remote peer.

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Version 1.2.5
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-------------

- note: the allowed size and number of tags per object were reduced
- fix a bug in ``gnt-cluster verify`` with inconsistent volume groups
- fixed twisted 8.x compatibility
- fixed ``gnt-instance replace-disks`` with iallocator
- add TCP keepalives on twisted connections to detect restarted nodes
- disk increase support, see ``gnt-instance grow-disk``
- implement bulk node/instance query for RAPI
- add tags in node/instance listing (optional)
- experimental migration (and live migration) support, read the man page
  for ``gnt-instance migrate``
- the ``ganeti-watcher`` logs are now timestamped, and the watcher also
  has some small improvements in handling its state file

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Version 1.2.4
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-------------

- Experimental readonly, REST-based remote API implementation;
  automatically started on master node, TCP port 5080, if enabled by
  ``--enable-rapi`` parameter to configure script.
- Instance allocator support. Add and import instance accept a
  ``--iallocator`` parameter, and call that instance allocator to decide
  which node to use for the instance. The iallocator document describes
  what's expected from an allocator script.
- ``gnt-cluster verify`` N+1 memory redundancy checks: Unless passed the
  ``--no-nplus1-mem`` option ``gnt-cluster verify`` now checks that if a
  node is lost there is still enough memory to fail over the instances
  that reside on it.
- ``gnt-cluster verify`` hooks: it is now possible to add post-hooks to
  ``gnt-cluster verify``, to check for site-specific compliance. All the
  hooks will run, and their output, if any, will be displayed. Any
  failing hook will make the verification return an error value.
- ``gnt-cluster verify`` now checks that its peers are reachable on the
  primary and secondary interfaces
- ``gnt-node add`` now supports the ``--readd`` option, to readd a node
  that is still declared as part of the cluster and has failed.
- ``gnt-* list`` commands now accept a new ``-o +field`` way of
  specifying output fields, that just adds the chosen fields to the
  default ones.
- ``gnt-backup`` now has a new ``remove`` command to delete an existing
  export from the filesystem.
- New per-instance parameters hvm_acpi, hvm_pae and hvm_cdrom_image_path
  have been added. Using them you can enable/disable acpi and pae
  support, and specify a path for a cd image to be exported to the
  instance. These parameters as the name suggest only work on HVM
  clusters.
- When upgrading an HVM cluster to Ganeti 1.2.4, the values for ACPI and
  PAE support will be set to the previously hardcoded values, but the
  (previously hardcoded) path to the CDROM ISO image will be unset and
  if required, needs to be set manually with ``gnt-instance modify``
  after the upgrade.
- The address to which an instance's VNC console is bound is now
  selectable per-instance, rather than being cluster wide. Of course
  this only applies to instances controlled via VNC, so currently just
  applies to HVM clusters.

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Version 1.2.3
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-------------

- more tweaks to the disk activation code (especially helpful for DRBD)
- change the default ``gnt-instance list`` output format, now there is
  one combined status field (see the manpage for the exact values this
  field will have)
- some more fixes for the mac export to hooks change
- make Ganeti not break with DRBD 8.2.x (which changed the version
  format in ``/proc/drbd``) (issue 24)
- add an upgrade tool from "remote_raid1" disk template to "drbd" disk
  template, allowing migration from DRBD0.7+MD to DRBD8

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Version 1.2.2
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-------------

- fix ``gnt-instance modify`` breakage introduced in 1.2.1 with the HVM
  support (issue 23)
- add command aliases infrastructure and a few aliases
- allow listing of VCPUs in the ``gnt-instance list`` and improve the
  man pages and the ``--help`` option of ``gnt-node
  list``/``gnt-instance list``
- fix ``gnt-backup list`` with down nodes (issue 21)
- change the tools location (move from $pkgdatadir to $pkglibdir/tools)
- fix the dist archive and add a check for including svn/git files in
  the future
- some developer-related changes: improve the burnin and the QA suite,
  add an upload script for testing during development

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Version 1.2.1
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-------------

- experimental HVM support, read the install document, section
  "Initializing the cluster"
- allow for the PVM hypervisor per-instance kernel and initrd paths
- add a new command ``gnt-cluster verify-disks`` which uses a new
  algorithm to improve the reconnection of the DRBD pairs if the device
  on the secondary node has gone away
- make logical volume code auto-activate LVs at disk activation time
- slightly improve the speed of activating disks
- allow specification of the MAC address at instance creation time, and
  changing it later via ``gnt-instance modify``
- fix handling of external commands that generate lots of output on
  stderr
- update documentation with regard to minimum version of DRBD8 supported

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Version 1.2.0
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-------------

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- Log the ``xm create`` output to the node daemon log on failure (to
  help diagnosing the error)
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- In debug mode, log all external commands output if failed to the logs
- Change parsing of lvm commands to ignore stderr

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Version 1.2b3
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-------------

- Another round of updates to the DRBD 8 code to deal with more failures
  in the replace secondary node operation
- Some more logging of failures in disk operations (lvm, drbd)
- A few documentation updates
- QA updates

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Version 1.2b2
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-------------

- Change configuration file format from Python's Pickle to JSON.
  Upgrading is possible using the cfgupgrade utility.
- Add support for DRBD 8.0 (new disk template ``drbd``) which allows for
  faster replace disks and is more stable (DRBD 8 has many improvements
  compared to DRBD 0.7)
- Added command line tags support (see man pages for ``gnt-instance``,
  ``gnt-node``, ``gnt-cluster``)
- Added instance rename support
- Added multi-instance startup/shutdown
- Added cluster rename support
- Added ``gnt-node evacuate`` to simplify some node operations
- Added instance reboot operation that can speedup reboot as compared to
  stop and start
- Soften the requirement that hostnames are in FQDN format
- The ``ganeti-watcher`` now activates drbd pairs after secondary node
  reboots
- Removed dependency on debian's patched fping that uses the
  non-standard ``-S`` option
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- Now the OS definitions are searched for in multiple, configurable
  paths (easier for distros to package)
Michael Hanselmann's avatar
Michael Hanselmann committed
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- Some changes to the hooks infrastructure (especially the new
  post-configuration update hook)
- Other small bugfixes
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.. vim: set textwidth=72 :
Iustin Pop's avatar
Iustin Pop committed
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.. Local Variables:
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