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Currently the iv_name is very linux-specific, and will break with the
multi-disk changes.

The patch changes this to generate sdX names based on the disk index in
the disks structure, instead of relying on the iv_name.

Reviewed-by: imsnah

Reviewed-by: imsnah

This patch changes the hypervisor functions to use the beparams dict
instead of the instance attributes.

Reviewed-by: ultrotter

This patch adds the new methods CheckParameterSyntax and the
ValidateParameters in the base and xen hypervisors. It also changes the
xen hypervisor to use the new hvparams field on instance.

Reviewed-by: imsnah

Use a default vnc_bind_address if None is specified

Reviewed-by: iustinp

Allow access to HVM serial console

Reviewed-by: imsnah

Add HVM device type flags 2/3

Reviewed-by: ultrotter

It's python, isn't it?

Reviewed-by: iustinp

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

Reviewed-by: ultrotter

This patch adds hypervisor support for the extended HVM features.

Author: schreiberal
Reviewed-by: iustinp

There are a couple of reasons for doing so:
- /proc is not OS independent, it's only supported by Linux (there are
  emulations on other systems, but those might differ from the way
  Linux represents data).
- Checking a daemon's state doesn't necessarily mean it's usable.
  Connecting to the socket using “xm info” is much safer.
- Reduce code size.

Reviewed-by: iustinp

Reviewed-by: iustinp

This patch adds the backend and frontend changes needed for being able
to list the cpu count.

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

Reviewed-by: ultrotter

The driver in the xen config file needs to be changed when dealing with
files rather then bdevs.

This patch does two things:
- Add _GetConfigFileDiskData to XenHypervisor which returns the correct
  disk xen config line. This function checks the logical disk type of
  every given block device, such that also hybrid (e.g. mixed drbd and
  file VBDs) are possible
- Make Xen[Pvm|Hvm]Hypervisor._WriteConfigFile() a classmethod to be
  able to call the helper function _GetConfigFileDiskData() in their
  parent XenHypervisor

Reviewed-by: iustinp

Reviewed-by: imsnah

Currently the fake hypervisor has hardcoded ‘/var/run’ as a base
directory for its store. This patch adds a constant RUN_DIR that is used
for both the fake hypervisor and for BDEV_CACHE_DIR.

Reviewed-by: ultrotter

This patch adds support for specifying and changing the boot device order for
HVM instances. The boot device order specification is ignored for non HVM
instances.

Reviewed-by: iustinp

This patch changes the hypervisor to use the new kernel and initrd
instance attributes. They kernel is handled as expected (use the custom
or the default one), but the initrd is treated a little bit special, in
order to keep compatibility with previous behaviour:
  - if customized and not found, raise an error
  - if default and not found, do not use one

Reviewed-by: imsnah

This patch implements a first proof-of-concept for HVM support in Ganeti.
Due to the nature of this patch, it is intended for test environments
only.

Reviewed-by: iustinp

Wrap error handling around creating the instance config file.

Reviewed-by: iustinp

Abstract the parts of the Xen hypervisor interface shared by both PVM and
HVM into a generic interface, subclass the special case PVM from that.

Prepatch for adding HVM support.


Reviewed-by: iustinp

Change the internal hypervisor API for GetShellCommandForConsole, we
now call it with the instance instead of just the instance name.

This is a prep patch for HVM, since HVM needs more than just the instance
name to determine a way of console access.

(this is a resend due to mail adress tyop)

Reviewed-by: iustinp

Move constant definitions for hypervisor into constants.py

Reviewed-by: ultrotter

Currently, the Hypervisor error raised on ‘xm create’ failure doesn't
contain the actual output from the command, thus what we log to the node
daemon log is not helpful enough. This patch fixes that.

Reviewed-by: schreiberal

The beginning of the infrastructure for detailed instance restarts. Does
not affect behaviour if code yet.

Reviewed-by: iustinp

Reviewed-by: iustinp

Since modules are not directly executables, remove the shebang from
them. This helps with lintian warnings.

Also make the autogenerated _autoconf.py contain two comment lines at
the beginning, like the other modules.

Reviewed-by: ultrotter

This changelist add:
  - documentation on how to select the kernel and initrd (if needed) for
    instances
  - support in hypervisor.py for the initrd
  - adds note about internet-connectivity and debootstrap requirements
    for the minimal etch os
  - documentation on the miminum xenvg size

Reviewed-by: roman.marxer,ultrotter

This changes the raising of exceptions from:
  raise Exception, value
to
  raise Exception(value)

as the first form will be removed in python-3000 and the second form is
preferred now.

The changes also involve a few cases of changing from raising standard
exceptions and use our own ones.

The new version also fixes many pylint-generated warnings, especially in
ganeti-noded where I changed many methods to @staticmethod.

There is no functionality changed (barring any bugs).

Reviewed-by: iustinp