This patch adds a new opcode and LU for growing an instance's disk.

The opcode allows growing only one disk at time, and will throw an error
if the operation fails midway (e.g. on the primary node after it has
been increased on the secondary node). As such, it might actually leave
different sized LVs on different nodes, but this will not create
problems.

Reviewed-by: imsnah

This patch adds a method that implements updating of a disk
(object.Disk) size, together with its children.

While this will not track the exact disk size, it allows at least an
approximate size to be recorded in the configuration (and queried).

Reviewed-by: imsnah

This simple patch exposes the block device grow operation at the rpc
layer. It does not increase the protocol version as it has been recently
changed by the live failover rpc call.

Reviewed-by: imsnah

This patch adds a wrapper over the block device grow operation that
converts the input and output parameters as needed for the rpc layer.

Reviewed-by: imsnah

This patch implements disk resize at the bdev level for the LVM and
DRBD8 disk types. It is not implemented for DRBD7 and MD since the way
MD works with its underlaying devices makes it harder and this
combination is also deprecated.

The LVM resize operation is tried three times, with different allocation
policies:
  - contiguous first, since this is best for allocation purposes (it
    won't fragment too much the PV)
  - cling, which is supported only by more recent LVM versions, will try
    to place the new extents on the same PV as the rest of the LV
  - and finally normal, which is the default

Reviewed-by: imsnah

Before we used to be able to update SimpleStore by just calling SetKey, this
feature is now moved to an external class, which inherits from it. In this
patch the new WritableSimpleStore class is also put to use, in the LUs that
need it. Rather than making each LU instantiate it, we have a new LogicalUnit
flag REQ_WSSTORE which defaults to False, but when declared to be True asks the
LogicalUnit to be initialized with a writeable version of the SimpleStore.
LUMasterFailover and LURenameCluster are then changed to use it.

InitCluster is also changed to instantiate a WritableSimpleStore, rather
than a normal one.

Reviewed-by: imsnah

This patch adds the migration rpc call and its implementation in the
backend. The patch does not deal with the correct activation of disks.

Because of the new RPC, the protocol version is increased.

Reviewed-by: imsnah

This is just the hypervisor-level migration (e.g. “xm migrate”) not the
whole node coordination work.

Reviewed-by: ultrotter

When replacing disks or evacuating nodes with instances administratively
down ganeti fails because the instance disks are not active. This patch
activates them, performs the replacement, and shuts them down again.
Changing this also fixes the same issue on gnt-node evacuate.

Reviewed-by: iustinp

We're not adding a new instance, just making configuration changes to
the one we're working on.

Reviewed-by: imsnah

Currently the iallocator option is ignored by burnin at import/export
time even if passed in. With this patch it becomes used. The log message
used by the importer is also changed to reflect this.

This patch also improves import/export on the non-iallocator case:
  - The secondary node is not passed anymore on non-mirrored templates
  - On mirrored templates the secondary node is logged

Reviewed-by: imsnah

There is a mistake in the error message generated when we can't reach a
node for checking for available disk space. Without it, the error
message is:
Failure: prerequisites not met for this operation:
Cannot get current information from node '{u'gnte2.lab.k1024.org':
{'cpu_total': 1, 'memory_free': 480, 'vg_size': 131068, 'memory_total':
504, 'bootid': '2176dd3b-2f96-42f0-8b6e-2873ecaf5f9c', 'memory_dom0':
134, 'vg_free': 130172}, u'gnte1.lab.k1024.org': False}'

instead of the expected:
Failure: prerequisites not met for this operation:
Cannot get current information from node 'gnte2.lab.k1024.org'

Reviewed-by: imsnah

Reviewed-by: iustinp

- Shorter code
- Reorder arguments to logger.SetupLogging calls to make more sense

Reviewed-by: iustinp

When a Job raises a ganeti exception a message is printed but nothing is
reported in the job itself. It's better to update the job status, thus
notifying the client, possibly polling for the job result, of what went
wrong.

Reviewed-by: iustinp

s/result/op_result/ (this code was never used, so this wasn't caught)

Reviewed-by: iustinp

Not all distributions have the same version of aclocal, autoconf
or automake. Users can pass the name of a specific executables
via environment variables. Change configure.ac to require at
least autoconf 1.9.

Reviewed-by: iustinp

This allows us to initialize a new cluster. The code certainly contains
bugs and hooks aren't implemented yet.

Reviewed-by: iustinp

This is required for splitting the cluster initialization code.

Reviewed-by: iustinp

This is required for the split of the cluster initialization code.

Reviewed-by: iustinp, ultrotter

It's not needed anymore now that all opcodes require a cluster. Cluster
initialization was the only exception.

Reviewed-by: iustinp

Reviewed-by: iustinp

…/run/master.sock is not specific enough.

Reviewed-by: iustinp

SimpleStore is instantiated anew most of the times it's used, so having
a cache inside it serves no purpose. Removing it.

Reviewed-by: iustinp

- Failover back to original node in instance failure test
- Exclude secondary node from list of potential nodes in
  replace-disks test

Reviewed-by: iustinp

Reviewed-by: ultrotter

Reviewed-by: iustinp

- Add --iallocator options
- Small text fixes

Reviewed-by: ultrotter

Reviewed-by: iustinp

Reviewed-by: iustinp

Reviewed-by: ultrotter

The remote API will use JSON for the foreseable future, so it's better
to put the serialization format in the function name. We can still
use another serialization format for Ganeti's core.

Reviewed-by: amishchenko, schreiberal

Reviewed-by: ultrotter

Currently the check for enough memory is done only on instance start
command and failover command. But we also start an instance in instance
create, therefore we need to check this instead of failing to start in
the hypervisor phase.

The patch adds a check for node memory in the case the creation command
specifies that the instance should be started. It is allowed for the
memory to be less than needed if the instance will not be started, in
order to allow migration and other such cases.

Reviewed-by: imsnah

Author: schreiberal
Reviewed-by: iustinp

Another tiny fix. Anybody got a nice brown paper bag I can wear?

Author: schreiberal
Reviewed-by: iustinp

This fixes gnt-instance modify so it actually works with the
new HVM parameters for Ganeti 1.2

Author: schreiberal
Reviewed-by: iustinp

This patch modifies the code for "gnt-instance info .." to only display
instance parameters that actually apply to that instance, i.e. for PVM
instances no HVM parameters are shown and vice versa.

Author: schreiberal
Reviewed-by: iustinp

This patch documents the extended HVM features.

Author: schreiberal
Reviewed-by: imsnah

This patch adds hypervisor support for the extended HVM features.

Author: schreiberal
Reviewed-by: iustinp