Ganeti 2.7.0 available

---------- Forwarded message ----------
From: Guido Trotter <ultrotter@google.com>
Date: Thu, Jul 4, 2013 at 3:40 PM
Subject: Ganeti 2.7.0 released
To: Ganeti Users list <ganeti@googlegroups.com>


Hi,

We are happy to announce that Ganeti 2.7.0 has been released, with no
important changes from 2.7.0~rc3. Here is the NEWS file entry for 2.7:

Version 2.7.0
-------------

*(Released Thu, 04 Jul 2013)*

Incompatible/important changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

- Instance policies for disk size were documented to be on a per-disk
  basis, but hail applied them to the sum of all disks. This has been
  fixed.
- ``hbal`` will now exit with status 0 if, during job execution over
  LUXI, early exit has been requested and all jobs are successful;
  before, exit status 1 was used, which cannot be differentiated from
  "job error" case
- Compatibility with newer versions of rbd has been fixed
- ``gnt-instance batch-create`` has been changed to use the bulk create
  opcode from Ganeti. This lead to incompatible changes in the format of
  the JSON file. It's now not a custom dict anymore but a dict
  compatible with the ``OpInstanceCreate`` opcode.
- Parent directories for file storage need to be listed in
  ``$sysconfdir/ganeti/file-storage-paths`` now. ``cfgupgrade`` will
  write the file automatically based on old configuration values, but it
  can not distribute it across all nodes and the file contents should be
  verified. Use ``gnt-cluster copyfile
  $sysconfdir/ganeti/file-storage-paths`` once the cluster has been
  upgraded. The reason for requiring this list of paths now is that
  before it would have been possible to inject new paths via RPC,
  allowing files to be created in arbitrary locations. The RPC protocol
  is protected using SSL/X.509 certificates, but as a design principle
  Ganeti does not permit arbitrary paths to be passed.
- The parsing of the variants file for OSes (see
  :manpage:`ganeti-os-interface(7)`) has been slightly changed: now empty
  lines and comment lines (starting with ``#``) are ignored for better
  readability.
- The ``setup-ssh`` tool added in Ganeti 2.2 has been replaced and is no
  longer available. ``gnt-node add`` now invokes a new tool on the
  destination node, named ``prepare-node-join``, to configure the SSH
  daemon. Paramiko is no longer necessary to configure nodes' SSH
  daemons via ``gnt-node add``.
- Draining (``gnt-cluster queue drain``) and un-draining the job queue
  (``gnt-cluster queue undrain``) now affects all nodes in a cluster and
  the flag is not reset after a master failover.
- Python 2.4 has *not* been tested with this release. Using 2.6 or above
  is recommended. 2.6 will be mandatory from the 2.8 series.


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

- New network management functionality to support automatic allocation
  of IP addresses and managing of network parameters. See
  :manpage:`gnt-network(8)` for more details.
- New external storage backend, to allow managing arbitrary storage
  systems external to the cluster. See
  :manpage:`ganeti-extstorage-interface(7)`.
- New ``exclusive-storage`` node parameter added, restricted to
  nodegroup level. When it's set to true, physical disks are assigned in
  an exclusive fashion to instances, as documented in :doc:`Partitioned
  Ganeti <design-partitioned>`.  Currently, only instances using the
  ``plain`` disk template are supported.
- The KVM hypervisor has been updated with many new hypervisor
  parameters, including a generic one for passing arbitrary command line
  values. See a complete list in :manpage:`gnt-instance(8)`. It is now
  compatible up to qemu 1.4.
- A new tool, called ``mon-collector``, is the stand-alone executor of
  the data collectors for a monitoring system. As of this version, it
  just includes the DRBD data collector, that can be executed by calling
  ``mon-collector`` using the ``drbd`` parameter. See
  :manpage:`mon-collector(7)`.
- A new user option, :pyeval:`rapi.RAPI_ACCESS_READ`, has been added
  for RAPI users. It allows granting permissions to query for
  information to a specific user without giving
  :pyeval:`rapi.RAPI_ACCESS_WRITE` permissions.
- A new tool named ``node-cleanup`` has been added. It cleans remains of
  a cluster from a machine by stopping all daemons, removing
  certificates and ssconf files. Unless the ``--no-backup`` option is
  given, copies of the certificates are made.
- Instance creations now support the use of opportunistic locking,
  potentially speeding up the (parallel) creation of multiple instances.
  This feature is currently only available via the :doc:`RAPI
  <rapi>` interface and when an instance allocator is used. If the
  ``opportunistic_locking`` parameter is set the opcode will try to
  acquire as many locks as possible, but will not wait for any locks
  held by other opcodes. If not enough resources can be found to
  allocate the instance, the temporary error code
  :pyeval:`errors.ECODE_TEMP_NORES` is returned. The operation can be
  retried thereafter, with or without opportunistic locking.
- New experimental linux-ha resource scripts.
- Restricted-commands support: ganeti can now be asked (via command line
  or rapi) to perform commands on a node. These are passed via ganeti
  RPC rather than ssh. This functionality is restricted to commands
  specified on the ``$sysconfdir/ganeti/restricted-commands`` for security
  reasons. The file is not copied automatically.

Misc changes
~~~~~~~~~~~~

- Diskless instances are now externally mirrored (Issue 237). This for
  now has only been tested in conjunction with explicit target nodes for
  migration/failover.
- Queries not needing locks or RPC access to the node can now be
  performed by the confd daemon, making them independent from jobs, and
  thus faster to execute. This is selectable at configure time.
- The functionality for allocating multiple instances at once has been
  overhauled and is now also available through :doc:`RAPI <rapi>`.

There are no significant changes from version 2.7.0~rc3.


--
Guido Trotter
Ganeti Engineering
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