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News
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====
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Version 2.1.0
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-------------
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Ganeti 2.1 brings many improvements with it. Major changes:
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- Added infrastructure to ease automated disk repairs
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- Added new daemon to export configuration data in a cheaper way than
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  using the remote API
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- Instance NICs can now be routed instead of being associated with a
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  networking bridge
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- Improved job locking logic to reduce impact of jobs acquiring multiple
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  locks waiting for other long-running jobs
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Detailed implementation details can be found in the Ganeti 2.1 design
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document.
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Details
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~~~~~~~
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- Added chroot hypervisor
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- Added more options to xen-hvm hypervisor (``kernel_path`` and
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  ``device_model``)
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- Added more options to xen-pvm hypervisor (``use_bootloader``,
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  ``bootloader_path`` and ``bootloader_args``)
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- Added luxi call to submit multiple jobs in one go
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- Added cluster initialization time option to not modify ``/etc/hosts``
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  file on nodes
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- Added network interface parameters
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- Added dry run mode to some LUs
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- Added RAPI resources:
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  - ``/2/instances/[instance_name]/info``
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  - ``/2/instances/[instance_name]/replace-disks``
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  - ``/2/nodes/[node_name]/evacuate``
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  - ``/2/nodes/[node_name]/migrate``
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  - ``/2/nodes/[node_name]/role``
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  - ``/2/nodes/[node_name]/storage``
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  - ``/2/nodes/[node_name]/storage/modify``
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  - ``/2/nodes/[node_name]/storage/repair``
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- Added OpCodes to evacuate or migrate all instances on a node
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- Added new command to list physical volumes on nodes (``gnt-node
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  physical-volumes``) and to modify them (``gnt-node modify-volume``)
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- Added new ssconf files with master candidate IP address
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  (``ssconf_master_candidates_ips``), node primary IP address
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  (``ssconf_node_primary_ips``) and node secondary IP address
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  (``ssconf_node_secondary_ips``)
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- Added ``ganeti-confd`` and a client library to query the Ganeti
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  configuration via UDP
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- Added ability to run hooks after cluster initialization and before
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  cluster destruction
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- Added automatic mode for disk replace (``gnt-instance replace-disks
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  --auto``)
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- Added ``gnt-instance recreate-disks`` to re-create (empty) disks
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  after catastrophic data-loss
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- Added ``gnt-node repair-volume`` command to repair damanged LVM volume
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  groups
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- Added ``gnt-instance move`` command to move instances
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- Added ``gnt-cluster watcher`` command to control watcher
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- Added ``gnt-node powercycle`` command to powercycle nodes
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- Added new job status field ``lock_status``
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- Added parseable error codes to cluster verification (``gnt-cluster
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  verify --error-codes``) and made output less verbose (use
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  ``--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
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- Added more unittests
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- Fixed critical bug in ganeti-masterd startup
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- Pass ``INSTANCE_REINSTALL`` variable to OS installation script when
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  reinstalling an instance
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- Converted to Sphinx (http://sphinx.pocoo.org/) for documentation
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- Many documentation updates
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- Distribute hypervisor files on ``gnt-cluster redist-conf``
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- ``gnt-instance reinstall`` can now reinstall multiple instances
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- Updated many command line parameters
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- Introduced new OS API version 15
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- No longer support a default hypervisor
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- Treat virtual LVs as inexistent
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- Improved job locking logic to reduce lock contention
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- Match instance and node names case insensitively
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- Reimplemented bash completion script to be more complete
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- 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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-------------
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- Fixed many wrong messages
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- Fixed a few bugs related to the locking library
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- Fixed MAC checking at instance creation time
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- Fixed a DRBD parsing bug related to gaps in /proc/drbd
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- Fixed a few issues related to signal handling in both daemons and
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  scripts
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- Fixed the example startup script provided
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- Fixed insserv dependencies in the example startup script (patch from
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  Debian)
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- Fixed handling of drained nodes in the iallocator framework
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- Fixed handling of KERNEL_PATH parameter for xen-hvm (Debian bug
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  #528618)
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- Fixed error related to invalid job IDs in job polling
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- Fixed job/opcode persistence on unclean master shutdown
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- Fixed handling of partial job processing after unclean master
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  shutdown
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- Fixed error reporting from LUs, previously all errors were converted
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  into execution errors
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- Fixed error reporting from burnin
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- Decreased significantly the memory usage of the job queue
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- Optimised slightly multi-job submission
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- Optimised slightly opcode loading
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- Backported the multi-job submit framework from the development
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  branch; multi-instance start and stop should be faster
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- Added script to clean archived jobs after 21 days; this will reduce
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  the size of the queue directory
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- Added some extra checks in disk size tracking
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- Added an example ethers hook script
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- Added a cluster parameter that prevents Ganeti from modifying of
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  /etc/hosts
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- 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
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- Added a bind-address option to ganeti-rapi
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- Added more checks to the configuration verify
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- Enhanced the burnin script such that some operations can be retried
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  automatically
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- Converted instance reinstall to multi-instance model
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Version 2.0.3
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-------------
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- Added ``--ignore-size`` to the ``gnt-instance activate-disks`` command
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  to allow using the pre-2.0.2 behaviour in activation, if any existing
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  instances have mismatched disk sizes in the configuration
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- Added ``gnt-cluster repair-disk-sizes`` command to check and update
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  any configuration mismatches for disk sizes
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- Added ``gnt-master cluste-failover --no-voting`` to allow master
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  failover to work on two-node clusters
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- Fixed the ``--net`` option of ``gnt-backup import``, which was
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  unusable
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- Fixed detection of OS script errors in ``gnt-backup export``
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- Fixed exit code of ``gnt-backup export``
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Version 2.0.2
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-------------
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- Added experimental support for stripped logical volumes; this should
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  enhance performance but comes with a higher complexity in the block
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  device handling; stripping is only enabled when passing
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  ``--with-lvm-stripecount=N`` to ``configure``, but codepaths are
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  affected even in the non-stripped mode
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- Improved resiliency against transient failures at the end of DRBD
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  resyncs, and in general of DRBD resync checks
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- Fixed a couple of issues with exports and snapshot errors
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- Fixed a couple of issues in instance listing
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- Added display of the disk size in ``gnt-instance info``
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- 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
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- Fixed http server library, and thus RAPI, to handle invalid
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  username/password combinations correctly; this means that now they
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  report unauthorized for queries too, not only for modifications,
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  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
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- Fixed cluster modify and changes of candidate pool size
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- Fixed cluster verify error messages for wrong files on regular nodes
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- Fixed a couple of issues with node demotion from master candidate role
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- Fixed node readd issues
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- 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
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  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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-------------
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- added ``-H``/``-B`` startup parameters to ``gnt-instance``, which will
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  allow re-adding the start in single-user option (regression from 1.2)
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- the watcher writes the instance status to a file, to allow monitoring
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  to report the instance status (from the master) based on cached
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  results of the watcher's queries; while this can get stale if the
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  watcher is being locked due to other work on the cluster, this is
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  still an improvement
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- the watcher now also restarts the node daemon and the rapi daemon if
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  they died
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- 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
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  hook scripts need to take action based on the instance's properties
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  (no longer need to query back into ganeti)
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- instance failovers when the instance is stopped do not check for free
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  RAM, so that failing over a stopped instance is possible in low memory
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  situations
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- rapi uses queries for tags instead of jobs (for less job traffic), and
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  for cluster tags it won't talk to masterd at all but read them from
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  ssconf
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- a couple of error handling fixes in RAPI
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- drbd handling: improved the error handling of inconsistent disks after
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  resync to reduce the frequency of "there are some degraded disks for
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  this instance" messages
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- fixed a bug in live migration when DRBD doesn't want to reconnect (the
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  error handling path called a wrong function name)
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Version 2.0.0 final
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-------------------
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- no changes from rc5
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Version 2.0 release candidate 5
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-------------------------------
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- fix a couple of bugs (validation, argument checks)
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- fix ``gnt-cluster getmaster`` on non-master nodes (regression)
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- some small improvements to RAPI and IAllocator
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- make watcher automatically start the master daemon if down
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Version 2.0 release candidate 4
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-------------------------------
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- change the OS list to not require locks; this helps with big clusters
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- fix ``gnt-cluster verify`` and ``gnt-cluster verify-disks`` when the
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  volume group is broken
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- ``gnt-instance info``, without any arguments, doesn't run for all
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  instances anymore; either pass ``--all`` or pass the desired
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  instances; this helps against mistakes on big clusters where listing
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  the information for all instances takes a long time
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- miscellaneous doc and man pages fixes
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Version 2.0 release candidate 3
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-------------------------------
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- Change the internal locking model of some ``gnt-node`` commands, in
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  order to reduce contention (and blocking of master daemon) when
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  batching many creation/reinstall jobs
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- Fixes to Xen soft reboot
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- No longer build documentation at build time, instead distribute it in
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  the archive, in order to reduce the need for the whole docbook/rst
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  toolchains
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Version 2.0 release candidate 2
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-------------------------------
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- Now the cfgupgrade scripts works and can upgrade 1.2.7 clusters to 2.0
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- Fix watcher startup sequence, improves the behaviour of busy clusters
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- Some other fixes in ``gnt-cluster verify``, ``gnt-instance
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  replace-disks``, ``gnt-instance add``, ``gnt-cluster queue``, KVM VNC
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  bind address and other places
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- Some documentation fixes and updates
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Version 2.0 release candidate 1
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-------------------------------
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- More documentation updates, now all docs should be more-or-less
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  up-to-date
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- A couple of small fixes (mixed hypervisor clusters, offline nodes,
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  etc.)
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- Added a customizable HV_KERNEL_ARGS hypervisor parameter (for Xen PVM
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  and KVM)
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- Fix an issue related to $libdir/run/ganeti and cluster creation
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Version 2.0 beta 2
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------------------
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- Xen PVM and KVM have switched the default value for the instance root
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  disk to the first partition on the first drive, instead of the whole
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  drive; this means that the OS installation scripts must be changed
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  accordingly
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- Man pages have been updated
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- RAPI has been switched by default to HTTPS, and the exported functions
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  should all work correctly
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- RAPI v1 has been removed
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- Many improvements to the KVM hypervisor
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- Block device errors are now better reported
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- Many other bugfixes and small improvements
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Version 2.0 beta 1
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------------------
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- Version 2 is a general rewrite of the code and therefore the
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  differences are too many to list, see the design document for 2.0 in
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  the ``doc/`` subdirectory for more details
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- In this beta version there is not yet a migration path from 1.2 (there
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  will be one in the final 2.0 release)
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- A few significant changes are:
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  - all commands are executed by a daemon (``ganeti-masterd``) and the
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    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,
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    see the ``gnt-job(8)`` manpage
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  - the RAPI daemon supports read-write operations, secured by basic
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    HTTP authentication on top of HTTPS
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  - DRBD version 0.7 support has been removed, DRBD 8 is the only
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    supported version (when migrating from Ganeti 1.2 to 2.0, you need
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    to migrate to DRBD 8 first while still running Ganeti 1.2)
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  - DRBD devices are using statically allocated minor numbers, which
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    will be assigned to existing instances during the migration process
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  - there is support for both Xen PVM and Xen HVM instances running on
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    the same cluster
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  - KVM virtualization is supported too
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  - file-based storage has been implemented, which means that it is
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    possible to run the cluster without LVM and DRBD storage, for
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    example using a shared filesystem exported from shared storage (and
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    still have live migration)
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Version 1.2.7
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-------------
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- Change the default reboot type in ``gnt-instance reboot`` to "hard"
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- Reuse the old instance mac address by default on instance import, if
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  the instance name is the same.
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- Handle situations in which the node info rpc returns incomplete
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  results (issue 46)
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- Add checks for tcp/udp ports collisions in ``gnt-cluster verify``
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- Improved version of batcher:
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  - state file support
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  - instance mac address support
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  - support for HVM clusters/instances
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- Add an option to show the number of cpu sockets and nodes in
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  ``gnt-node list``
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- Support OSes that handle more than one version of the OS api (but do
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  not change the current API in any other way)
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- Fix ``gnt-node migrate``
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- ``gnt-debug`` man page
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- Fixes various more typos and small issues
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- Increase disk resync maximum speed to 60MB/s (from 30MB/s)
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Version 1.2.6
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-------------
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- new ``--hvm-nic-type`` and ``--hvm-disk-type`` flags to control the
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  type of disk exported to fully virtualized instances.
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- 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
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  avoid warnings on cluster verify if there is not enough memory to fail
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  over an instance. in the future it will prevent automatically failing
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  it over when we will support that.
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- batcher tool for instance creation, see ``tools/README.batcher``
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- ``gnt-instance reinstall --select-os`` to interactively select a new
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  operating system when reinstalling an instance.
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- when changing the memory amount on instance modify a check has been
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  added that the instance will be able to start. also warnings are
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  emitted if the instance will not be able to fail over, if auto_balance
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  is true.
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- documentation fixes
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- sync fields between ``gnt-instance list/modify/add/import``
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- fix a race condition in drbd when the sync speed was set after giving
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  the device a remote peer.
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Version 1.2.5
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-------------
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- note: the allowed size and number of tags per object were reduced
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- fix a bug in ``gnt-cluster verify`` with inconsistent volume groups
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- fixed twisted 8.x compatibility
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- fixed ``gnt-instance replace-disks`` with iallocator
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- add TCP keepalives on twisted connections to detect restarted nodes
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- disk increase support, see ``gnt-instance grow-disk``
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- implement bulk node/instance query for RAPI
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- add tags in node/instance listing (optional)
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- experimental migration (and live migration) support, read the man page
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  for ``gnt-instance migrate``
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- the ``ganeti-watcher`` logs are now timestamped, and the watcher also
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  has some small improvements in handling its state file
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Version 1.2.4
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-------------
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- Experimental readonly, REST-based remote API implementation;
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  automatically started on master node, TCP port 5080, if enabled by
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  ``--enable-rapi`` parameter to configure script.
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- Instance allocator support. Add and import instance accept a
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  ``--iallocator`` parameter, and call that instance allocator to decide
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  which node to use for the instance. The iallocator document describes
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  what's expected from an allocator script.
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- ``gnt-cluster verify`` N+1 memory redundancy checks: Unless passed the
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  ``--no-nplus1-mem`` option ``gnt-cluster verify`` now checks that if a
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  node is lost there is still enough memory to fail over the instances
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  that reside on it.
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- ``gnt-cluster verify`` hooks: it is now possible to add post-hooks to
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  ``gnt-cluster verify``, to check for site-specific compliance. All the
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  hooks will run, and their output, if any, will be displayed. Any
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  failing hook will make the verification return an error value.
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- ``gnt-cluster verify`` now checks that its peers are reachable on the
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  primary and secondary interfaces
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- ``gnt-node add`` now supports the ``--readd`` option, to readd a node
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  that is still declared as part of the cluster and has failed.
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- ``gnt-* list`` commands now accept a new ``-o +field`` way of
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  specifying output fields, that just adds the chosen fields to the
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  default ones.
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- ``gnt-backup`` now has a new ``remove`` command to delete an existing
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  export from the filesystem.
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- New per-instance parameters hvm_acpi, hvm_pae and hvm_cdrom_image_path
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  have been added. Using them you can enable/disable acpi and pae
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  support, and specify a path for a cd image to be exported to the
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  instance. These parameters as the name suggest only work on HVM
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  clusters.
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- When upgrading an HVM cluster to Ganeti 1.2.4, the values for ACPI and
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  PAE support will be set to the previously hardcoded values, but the
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  (previously hardcoded) path to the CDROM ISO image will be unset and
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  if required, needs to be set manually with ``gnt-instance modify``
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  after the upgrade.
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- The address to which an instance's VNC console is bound is now
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  selectable per-instance, rather than being cluster wide. Of course
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  this only applies to instances controlled via VNC, so currently just
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  applies to HVM clusters.
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Version 1.2.3
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-------------
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- more tweaks to the disk activation code (especially helpful for DRBD)
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- change the default ``gnt-instance list`` output format, now there is
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  one combined status field (see the manpage for the exact values this
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  field will have)
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- some more fixes for the mac export to hooks change
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- make Ganeti not break with DRBD 8.2.x (which changed the version
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  format in ``/proc/drbd``) (issue 24)
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- add an upgrade tool from "remote_raid1" disk template to "drbd" disk
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  template, allowing migration from DRBD0.7+MD to DRBD8
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Version 1.2.2
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-------------
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- fix ``gnt-instance modify`` breakage introduced in 1.2.1 with the HVM
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  support (issue 23)
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- add command aliases infrastructure and a few aliases
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- allow listing of VCPUs in the ``gnt-instance list`` and improve the
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  man pages and the ``--help`` option of ``gnt-node
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  list``/``gnt-instance list``
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- fix ``gnt-backup list`` with down nodes (issue 21)
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- change the tools location (move from $pkgdatadir to $pkglibdir/tools)
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- fix the dist archive and add a check for including svn/git files in
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  the future
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- some developer-related changes: improve the burnin and the QA suite,
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  add an upload script for testing during development
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Version 1.2.1
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-------------
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- experimental HVM support, read the install document, section
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  "Initializing the cluster"
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- allow for the PVM hypervisor per-instance kernel and initrd paths
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- add a new command ``gnt-cluster verify-disks`` which uses a new
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  algorithm to improve the reconnection of the DRBD pairs if the device
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  on the secondary node has gone away
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- make logical volume code auto-activate LVs at disk activation time
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- slightly improve the speed of activating disks
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- allow specification of the MAC address at instance creation time, and
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  changing it later via ``gnt-instance modify``
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- fix handling of external commands that generate lots of output on
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  stderr
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- 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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481 7faf5110 Michael Hanselmann
- Log the ``xm create`` output to the node daemon log on failure (to
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  help diagnosing the error)
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- In debug mode, log all external commands output if failed to the logs
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- Change parsing of lvm commands to ignore stderr
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Version 1.2b3
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-------------
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490 61b5e342 Michael Hanselmann
- Another round of updates to the DRBD 8 code to deal with more failures
491 61b5e342 Michael Hanselmann
  in the replace secondary node operation
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- Some more logging of failures in disk operations (lvm, drbd)
493 61b5e342 Michael Hanselmann
- A few documentation updates
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- QA updates
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Version 1.2b2
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-------------
499 61b5e342 Michael Hanselmann
500 61b5e342 Michael Hanselmann
- Change configuration file format from Python's Pickle to JSON.
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  Upgrading is possible using the cfgupgrade utility.
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- Add support for DRBD 8.0 (new disk template ``drbd``) which allows for
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  faster replace disks and is more stable (DRBD 8 has many improvements
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  compared to DRBD 0.7)
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- Added command line tags support (see man pages for ``gnt-instance``,
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  ``gnt-node``, ``gnt-cluster``)
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- Added instance rename support
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- Added multi-instance startup/shutdown
509 61b5e342 Michael Hanselmann
- Added cluster rename support
510 61b5e342 Michael Hanselmann
- Added ``gnt-node evacuate`` to simplify some node operations
511 61b5e342 Michael Hanselmann
- Added instance reboot operation that can speedup reboot as compared to
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  stop and start
513 61b5e342 Michael Hanselmann
- Soften the requirement that hostnames are in FQDN format
514 61b5e342 Michael Hanselmann
- The ``ganeti-watcher`` now activates drbd pairs after secondary node
515 61b5e342 Michael Hanselmann
  reboots
516 61b5e342 Michael Hanselmann
- Removed dependency on debian's patched fping that uses the
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  non-standard ``-S`` option
518 7faf5110 Michael Hanselmann
- Now the OS definitions are searched for in multiple, configurable
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  paths (easier for distros to package)
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- Some changes to the hooks infrastructure (especially the new
521 61b5e342 Michael Hanselmann
  post-configuration update hook)
522 61b5e342 Michael Hanselmann
- Other small bugfixes
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.. vim: set textwidth=72 :