This way newly added files will be not be excluded by default. Fixes
also a small whitespace error in utils.py.

Reviewed-by: iustinp

This allows the rename failures to show the ouput of OS scripts.

Reviewed-by: ultrotter

As per Michael's comment, gitignore should not ignore a couple of real
files from the autotools/ directory.

Reviewed-by: ultrotter

The ConfigWriter.AllocateDRBDMinor requires the instance name, not the
instance object. The LUSetInstanceParms is passing wrongly the instance
object, which can cause breakage.

The patch also adds asserts to check for this mismatch in ConfigWriter.

Reviewed-by: ultrotter

The urllib2 module has very bad error handling. This patch changes to urllib
which is simpler, and we derive a custom class from the FancyURLopener. Burning
is no longer keeping sockets in CLOSE_WAIT state with this patch.

Reviewed-by: ultrotter

This patch adds support for verification of drbd minors space in cluster
verify: minors which belong to running instances and should be online
but are not, and minors which do not belong to any instace but are in
use.

The patch requires exposing some methods from bdev.DRBD8 and
config.ConfigWriter which were until now private methods.

Reviewed-by: ultrotter

Reviewed-by: ultrotter

In order to prevent errors with old, in-use DRBD minors, we check and
abort at create time if our minor is already in use. For this we need to
also modify DRBD8Status to be able to parse cs:Unconfigured devices.

Reviewed-by: ultrotter

This patch adds a tail file function, to be used for parsing and returning in
the job log OS installation failures.

Reviewed-by: ultrotter

This patch adds unified temporary file handling to the
testutils.GanetiTestCase class, which adds easy creation and automated
cleanup of temporary files.

The patch allows a simpler handling in a couple of test cases but
requires all child classes to call the parent setUp and tearDown
methods.

Reviewed-by: ultrotter

Reviewed-by: ultrotter

This allows the install and reinstall instance to return (hopefully)
relevant log files from the OS create scripts.

Reviewed-by: ultrotter

This will record the failure cause in starting up the instance in the
job log (and thus to the user).

Reviewed-by: ultrotter

Commit 2302 only modified _CreateBlockDevOnPrimary to the new style
result, but _CreateBlockDevOnSecondary was forgotten. After the merger
of the two functions, _CreateBlockDevOnSecondary was taken as template
so we checked against old-style values, thus completely breaking error
handling.

Reviewed-by: imsnah

Instead of having the default live in the gnt-cluster script, we move it
to the constants file. The patch also fixes a typo on constants.py.

Reviewed-by: ultrotter

This patch replaces a few obvious uses of [instance.primary_node] +
list(instance.secondary_nodes) (or similar usage) with the new
instance.all_nodes.

Reviewed-by: ultrotter

Commit 2294 introduced a new instance.all_nodes property, which
unfortunately is working incorrectly for non-drbd instances.

This patch fixes it by making sure the primary node is always added to
the set, even before recursing over (any potential) children.

Reviewed-by: imsnah

We don't need to pre-create the node entries in lvmap, since they will
be created at recursion time.

Reviewed-by: ultrotter

Some callers of _CreateBlockDev need recursive behaviour, but not all.
The replace secondary first creates (manually) new LVs to ensure storage
is there, and then it creates the new DRBD. At this point, we need a
non-recursive call so that the LVs are not needlessly re-created.

This patch splits the single device creation into a separate function,
so that LUReplaceDisks can use it.

Reviewed-by: ultrotter

Since only two boolean parameters differ between these two functions, we
combine them as to have less code duplication. This will be needed in
the future as we will need to split off the recursive part off.

Reviewed-by: ultrotter

This allows errors to be visible at the user level instead of just node
daemon logs.

Reviewed-by: ultrotter

For future propagation of error messages from backend to cmdlib and to
the job log, just having True/False return from the disk creation
function is not enough.

This patch converts these functions (_CreateDisks, _CreateBlockDevOnXXX)
to raise exception on errors, and otherwise the return value is None.

Reviewed-by: ultrotter

Currently when creation LVM-based instances, we always get the
extremely-confusing message "ERROR Can't find LV /dev/xenvg/..." which
is actually expected. This behaviour was introduced before we had
UUID-style LV names, since at that point it was not a unexpected to have
such volumes laying around after a failed creation.

Today, it's much more of an error to see existing volumes, and it's
better to abort with a failure. Since bdev.LogicalVolume.Create() method
will raise an error in case it exists, we can remove this check in
backend before creating the device.

The Create methods for DRBD and FileStorage currently don't raise
exception, as behaviour is not very well defined here.

We also change some exception types raised in bdev so that all
exceptions raised by device creation are a subclass of GenericError.

Reviewed-by: ultrotter

Currently we use a different UUID for the _data and _meta volumes of a
DRBD disk. This is confusing as it's hard to associate the two in the
output of “lvs” or “gnt-node volumes”.

The patch changes so that they use the same prefix.

Reviewed-by: ultrotter

Due to deficiencies in our block device implementation, it is a must to
call SetDiskID on disks before passing them to remote nodes. Since in
export/import, we don't touch the disks themselves, this was not needed
before in this function.

However, since having instance symlinks, the correct ID is needed here
too, and with static minors it's a "must need". This reflects into
failed instance starts after migration and/or failover.

Reviewed-by: ultrotter

In case we pass --disk-grow 0[,0..] then we should not call GrowDisks as it
prints confusing log lines.

Reviewed-by: imsnah

Since we often need the list of all nodes of an instance, we add a new
"all_nodes" property that returns all nodes of the instance, and we
switch secondary_nodes to a simpler implementation based on this new
function.

Reviewed-by: ultrotter

We need to pass the fully-qualified node to _CheckNodeOnline, not the short
one.

Reviewed-by: imsnah

This patch adds a burnin option to keep instances at the end, so that
debugging after a burnin failure is easier.

Also, we reorder the command line parsing and client query so that one
can use ./tools/burnin --help even on non-ganeti machines.

Reviewed-by: ultrotter

This patch rewraps some comments to shorter lengths, changes
double-quotes to single-quotes inside triple-quoted docstrings for
better editor handling.

It also fixes some epydoc errors, namely invalid crossreferences (after
method rename), documentation for inexistent (removed) parameters, etc.

Reviewed-by: ultrotter

The source port/addr is currently logged three times for each
connection, and this is unnecessary. We change two log entries to debug,
since they are useful for precise timing, and we keep only one at INFO
level.

Reviewed-by: imsnah

Reviewed-by: ultrotter

This is again a copy of the latest 1.2 burnin code related to migration.

Reviewed-by: ultrotter

This is forward port via copy (and not individual patches cherry-pick)
of the latest code on the 1.2 branch related to the migration.

The changes compared to 1.2 are the fact that we don't need the
IdentifyDisks step anymore (the drbd rpc calls are independent now), and
the rpc module improvements.

Reviewed-by: ultrotter

In replace disks to new secondary, since Attach (and therefore
call_blockdev_find) is not modifying the devices anymore, we need to
switch this LU to the new call_drbd_disconnect_net and
call_drbd_attach_net functions.

Due to the authentication needed in 2.0, we need to be more careful with
the activation order. In 1.2, we have the case that the new node was
directly activated with networking information, and could connect to the
primary while it was still connected or WFConnect to the old secondary.

In the new scheme, we:
  - create the new drbd in StandAlone mode
  - shutdown old secondary (primary becomes WFConnection)
  - disconnect primary (and thus it goes into StandAlone)
  - connect both primary and new secondary to network using the
    call_drbd_attach_net rpc

This should be safer, and is cleaner. This passes burnin.

Reviewed-by: ultrotter

This is a modified forward-port of DrbdNetReconfig and their associated
RPCs. In Ganeti 2.0, these functions will be used for two things:
  - live migration (as in 1.2)
  - and for other network reconfiguration tasks, since DRBD8.Attach()
    doesn't do them anymore

Because of the Attach() changes, we can now implement the
AttachNet/DisconnectNet functions as independent entities, and we don't
need the cache anymore.

Note these functions are copies of the latest 1.2 code, and not
cherry-picks of the (many) patches that went into 1.2.

Reviewed-by: ultrotter

Since now the Assemble function is different than Attach, we rename this
backend function to show that the intent is to fully assemble the device
(and it's always allowed to modify the device).

Reviewed-by: ultrotter

Currently, both the Attach and Assemble methods for DRBD8 devices will use and
alter the device state. This is suboptimal, and it has been worked
around in 1.2 via a special cache in the node daemon so that we don't
need to call Attach() again in migration, for example.

Since in 2.0 we have static minors, we can change these functions so
that:
  - Attach() does not affect the device in any way, and only checks if
    the minor is already in use or not
  - Assemble() has two logic paths, one for startup from unused minor
    (the old Assemble, now renamed _FastAssemble) and one for
    re-checking/fixing an in-use minor (the old Attach, now renamed
    _SlowAttach)

Basically Attach was renamed to _SlowAttach, Assemble to _FastAssemble,
and we have a new, simple Assemble that calls one or the other based on
the result of the new Attach.

The LUReplaceDisks (with new secondary) is relying on the special
semantics of Attach modifying the device and is broken until the end of
the patch series.

Reviewed-by: ultrotter

The caller of dev.Assemble() (backend._RecursiveAssembleBD) is doing an
explicit recursion over all the children of the device, with better
error reporting. As such, we don't need this repeated assembly inside
the base BlockDev class.

Reviewed-by: ultrotter

... as found by the QA script - bug was introduced by me in commit 2117.

Reviwed-by: imsnah