SetKey is used, other than for adding new nodes, in another few cases. Update
the docstring to reflect this, so we don't mislead people reading it.

Reviewed-by: iustinp

This completes the changes in r898 by actually getting rid of the old unused
hypervisor.py code which was left in the code tree.

Reviewed-by: iustinp

- Add a docstring to IOServer's constructor
- Add argument description to PoolWorker's and JobRunner's ones

Reviewed-by: iustinp

Reviewed-by: iustinp

Since local_raid1 and remote_raid1 are deprecated they are removed
from the docs. This patch removes some old documentation sections
and bumps the documented version from 1.2 to 1.3.

Reviewed-by: iustinp

Reviewed-by: iustinp

Only post-hooks are run on cluster verify, and then their output is sent back
to the LU, which upon failure displays it to the user and changes the result of
the execution to a failure.

Reviewed-by: iustinp

Previously LUs could be failed by pre-hooks, and post-hooks just had effects by
themselves. This patch allows a LU to define the HooksCallBack function if it
wants to know about its hooks' results and alter its results in response.

The ChainOpCode execution path contains some commented out hooks code, which
this patch modifies to run the HooksCallBack function, so this is not forgot if
it ever gets uncommented out.

Reviewed-by: iustinp

Right now the hooks output is propagated from the nodes all the way up to
HooksMaster.RunPhase, which uses it for debugging PRE hooks, but then silently
discards them. We'll now propagate it up to the Processor.ExecOpCode function,
where they can be handled for other purposes (or discarded again, of course).
This patch also improves a bit the HooksMaster.RunPhase docstring.

Reviewed-by: iustinp

Since NoHooksLU defines HPATH as None, BuildHooksEnv will never be called (as
the LogicalUnit.BuildHooksEnv docstring correctly states). Removing the
function altogether, to avoid having dead code lying around, and to make sure
the non-implemented one in LogicalUnit will be called if someone mistakenly
tries to call it, so it's immediately clear that something is wrong.

Reviewed-by: iustinp

The LogicalUnit.BuildHooksEnv docstring used to say that the node list should
not include the master node. This is obviously not the case checking the
relevant code, and double-checking with iustin he confirmed it just document
some obsolete behaviour. This patch removes those remarks making the docstring
shorter, easier, and, last but not least, correct! ;)

Reviewed-by: iustinp

A fewdocstrings in the HooksRunner backend class list arguments the relevant
functions do not take.  Clean them up.

Reviewed-by: iustinp

Reviewed-by: iustinp

Reviewed-by: iustinp

This patch adds a mechanism to disable utils.RunCmd in selected
programs. This is needed in the master daemon unless we confirm
threading doesn't pose any problems.

This makes cluster init fail, but creating new trunk clusters is anyway
broken at the moment.

Reviewed-by: ultrotter

This patch adds a check to LUExportInstance.CheckPrereq to raise an
error when an instance with file disks is exported.

Reviewed-by: ultrotter

This patch adds the file storage options to gnt-backup import which
would otherwise fail since the values of file_storage_dir and
file_driver are accessed in LUCreateInstance.

Reviewed-by: ultrotter

Before it was a huge file with more than 700 lines. No code changes were
made except for changing imports and class names where needed. In the
future, we could even think about only importing the hypervisors we
actually need. The patch finished QA scripts and distcheck successfully.

Reviewed-by: iustinp

This patch removes the lock and the lock options from cli.py and moves
them to the master.

Later during development we can remove it completely, but for now it's
good to protect any other tool that uses the lock directly.

Reviewed-by: imsnah,ultrotter

This patch converts the cli.py SubmitOpCode method to use the unix
protocol and thus execute the opcodes via the master.

The patch allows a partial burnin to work with the master. Currently the
query opcodes, since they are executed via the SubmitOpCode, are
executed inside a job too, which is suboptimal, but they work fine.

The cmd lock has been removed from the master, but the cli.py still
takes the lock. This is ok for this in-progress patch (since the master
still has only one executor thread). This will be fixed in a future
patch.

Reviewed-by: ultrotter

bdev.FileStorage does not have major or minor fields, so gnt-instance
info for file backed instances fails with a TypeError. This patch
adds checks to prevent that and print 'N/A' instead.

Reviewed-by: imsnah

This patch changes the code executed when testing the signal handling
of RunCmd. Since sh does not always point to bash (e.g. on Ubuntu,
where it points to /bin/dash) this test might fail due to the returned
exit code is different so the received signal is not correctly
detected.

Additionally fix the docstring of testSignal.

Reviewed-by: iustinp

Currently the iallocator execution takes place in the master, which is a
violation of the current architecture, and will create problems with a
threaded master daemon.

This patch moves the execution to the backend, similar to the hooks
runner, by:
  - introducing a new class that handles the execution in the backend
    (and could be used also for listing the allocators, etc.)
  - introducing a new rpc call
  - replacing the actual execution in IAllocator.Run() with a rpc call

This passes burnin with the dumb allocator

Reviewed-by: imsnah

The commit "IAllocator: some more info exported" broke the instance list
generation due to a wrong index variable. This patch fixes that.

Reviewed-by: ultrotter

Add parameters to not check the path for absoluteness, implement a dry
run mode and automatically create a backup if requested. This will be
used by the cfgupgrade utility.

Reviewed-by: schreiberal

This patch adds the following information to the exported info:
  - hypervisor type (in the main dict)
  - total memory used by primary instances (in each node dict) (can be
    computed from the node+instance dicts, but it's cheap to compute
    from Ganeti) (this is not live data, just from the config)
  - total memory used by primary instances marked to be up, similar to
    the above

Reviewed-by: imsnah

Currently we try to convert the values returned by call_node_info to
ints, and if all succeed, we actually do the conversion. Simplify this
by doing it in one step.

The patch also adds exporting of node memory as 'reserved_memory'.

Reviewed-by: imsnah

This patch extends the config objects with the slots to handle
more HVM configuration items.

Author: schreiberal
Reviewed-by: iustinp,imsnah

Reviewed-by: iustinp

Reviewed-by: imsnah

This patch initializes nic_count and disk_count with 0. This prevents
some reference errors if the snap_disks block device list is empty.

Reviewed-by: ultrotter

This small patch fixes:
  - wrong indentation in two places
  - use of 'os' variable that hides global scope os module

Reviewed-by: imsnah

This patch implements secondary replace via the iallocator. The new
opcode parameter 'iallocator' behaves like this: if passed, it will
always compute and assign a new secondary, behaving in effect as if the
secondary node has been passed. It conflicts with actually giving the
secondary too.

[Note: not tested with remote_raid1, but the code should behave the
same, we only touch CheckPrereq and we assign a node.]

The patch also adds burnin support for the replace secondary operation;
with this in place, burnin can fully work with auto-assigned nodes.

Reviewed-by: ultrotter

This simple patch adds memory size for the burnin instances, which helps
testing allocator algorithm response based on the available node memory
and instance memory size values.

Reviewed-by: ultrotter

The patch which generalized the IAllocator was half-true: it actually
put the selection of the node inside the IAllocator, so callers were not
able to specify replace primary node.

This patch does:
  - split the arguments to the constructor in three sets: mode and name
    are always passed, and then we differentiate between allocation
    parameters and relocation ones
  - add a new relocate_from option to the IAllocator constructor which
    is a list of nodes we want to move the instance off
  - rename the 'nodes' argument in the request object to 'relocate_from'
    since this is clearer and is not confused with the result field also
    called 'nodes'

Reviewed-by: ultrotter

This patch adds the two attributes file_storage_dir and file_driver
to the CreateInstance opcode in the ImportExport method, since
otherwise it will fail with the file storage patches.

Reviewed-by: iustinp

When the allocator or a non-mirrored template are used the message shown by
burnin at instance creation time was wrong. Fixing it.

Reviewed-by: iustinp

Make burnin remove exports after importing the instance back.

Reviewed-by: iustinp

This patch also fixes the LUExportInstance Prereq docstring.

Reviewed-by: iustinp

This patch adds the possibility to execute instance renaming when
doing a cluster burnin. The optional parameter --rename takes
one 'spare' instance name.
Given this option it renames all given instances to the spare one
and back to their original name.

Reviewed-by: iustinp