When waiting for the lock and pressing ^C, the user will get a backtrace
as the KeyboardInterrupt exception is not handled. The patch adds a
simple method of handling it.

Note that this is not about ^C in any other place.

Reviewed-by: schreiberal,imsnah

This patch adds the OpVerifyDisks handling in mcpu.py and the
verify-disks command in the gnt-cluster script, which for every instance
computed by LUVerifyDisks submits a new OpActivateInstanceDisks request.

Reviewed-by: imsnah

This patch adds a new LUVerifyDisks that implements the OpVerifyDisks.
The algorithm is that by determining not-used logical volumes for
instances that are supposed to be running, we presume from there that
the DRBD devices are not online and therefore one should
‘activate-disks’ for those instances.

Reviewed-by: imsnah

This patch adds the definition of a new opcode that will be used to
compute the list of instances with not-online disks.

Reviewed-by: imsnah

Currently, the volume_list call returns only the volume size. However,
it is useful to also have two other things: the 'inactive' state of the
volume (which might trigger a ‘vgchange -a y’ on the volume group) and
the online state (which shows if the volume is in use or not).

Since this modifies an RPC call, we also bump the protocol version,
although the single user of the call didn't care about the dictionary
values, only about the keys.

Reviewed-by: imsnah

Reviewed-by: schreiberal

Use result.stdout instead of result.output to avoid potential confusion
by merged in error messages from stderr.

Reviewed-by: iustinp

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

Reviewed-by: imsnah

- When line wrapping is needed, move spaces to the next line.
- Remove embedded line breaks from error messages.

Reviewed-by: schreiberal

This fixes the parsing of integers in the drbdsetup show output with
newer pyparsing versions.

Basically, the convert-to-int action that we use was taken from the
example documentation of an older pyparsing version that automatically
uses only the second element if the result is returned as a tuple, but
this was deprecated for a while and removed in 1.4.3.

Based on a nice report by Jorge Cabello <jorge@aspl.es>, and
confirmation about pyparsing behaviour from its author. Thanks!

Reviewed-by: imsnah

This patch replaces the hardcoded ‘/var/lock/’ directory with one based on
LOCALSTATEDIR.

Reviewed-by: imsnah

This patch adds logging of command failures to the debug log in case the
user either started the command (gnt-*) or the node daemon with the
debug flag.

Reviewed-by: imsnah

Currently, the results of ConfigWriter.VerifyConfig() are lost. Make
sure we log them too in cluster verify.

Reviewed-by: ultrotter

Since we now do changes of remote peers in two steps (Attach with no
network information and then Attach with the new peer's data), we don't
need this operation anymore.

Reviewed-by: imsnah

This patch splits the single operation of replace peer into two distinct
phases, in order to make a single change to the instance configuration:
  - detach from network
  - if at least one drbd device succeeded, make one change to the
    instance, pointing all disks to the new peer
  - attach to the new peer

This should eliminate the case when a failure in the second reattach can
leave the instance with two secondaries.

Reviewed-by: imsnah

This patch adds a new success condition for identifying DRBD8 devices:
if the local device is correct, but the network peer is not, we shutdown
the network and attach to the correct one (this also handles going to
standalone mode).

This new check (and its actions) is based on the fact that we don't pass
incorrect data from the master to the node (otherwise we could start
syncing with an incorrect peer.

Reviewed-by: imsnah

This patch adds a check in _AssembleNet so that if we are passed None
value in the unique_id, we instead switch to standalone mode.

Reviewed-by: imsnah

If we didn't sort this list, files would be in arbitrary order.

Reviewed-by: iustinp

Reviewed-by: iustinp

We didn't test for failure, just always logged the output.

Reviewed-by: imsnah

Reviewed-by: iustinp

Reviewed-by: ultrotter

Reviewed-by: schreiberal

This fixes issue #13.

Reviewed-by: schreiberal

Right now an assembly error produces an exception but not a log message. This
is bad because the exception suggests looking at the log, but the log itself
has a lot of errors which are not really a problem and only some which really
is. In order to make it clear where in the log the problem occurred we log a
message too, before raising the exception.

Reviewed-by: iustinp

Reviewed-by: schreiberal

We want to prevent sending too many 'None' children to a device.
However, the test as it is today is wrong, as we want to test the
situation after adding a new child, and not before. This patch fixes
this by testing greater-or-equal instead of just greater.

Reviewed-by: imsnah

The code assumes all lines have at least two elements which are
whitespace separated - i.e. it does not deal with empty lines or comment
lines with no spaces. This patch fixes this.

Also, the patch replaces the blank between IP and the canonical name
with a tab (restoring previous behaviour).

Reviewed-by: imsnah

This is a critical file. Breaking it would be very bad. Thus, if the system
crashes before the data is synched to the disk, it should have the complete
file afterwards.

Reviewed-by: iustinp

- Combine hostname and aliases on one line
- Fix bug with wrongfully removed newline characters
- Use wrapper for SetEtcHostsEntry in cmdlib

Reviewed-by: iustin

Reviewed-by: TODO

Reviewed-by: schreiberal

In order to make the replace secondary action to be done via the same
opcode parameters for both remote_raid1 and drbd, we must allow the
LUReplaceDisks to change replace_disks_all for drbd with non-empty
remote_node into replace_disks_sec.

This fixes gnt-node evacuate and also allows gnt-instace replace-disks
to have the same syntax for both remote_raid1 and drbd (when replacing
the secondary).

Reviewed-by: ultrotter

Currently, an unreachable node (or one that return undetermined failure)
in the hooks pre-phase will abort the curren operation. This is not
good, as a down node could prevent many operation on the cluster.

This patch changes a RPC-level failure (and not a hook execution
failure) into a warning. It also modifies the related test cases.

This fixes issue 11.

Reviewed-by: ultrotter

Reviewed-by: schreiberal

Reviewed-by: schreiberal

Reviewed-by: schreiberal

This patch modifes:
  - mcpu.Processor.LogWarning to have its 'hint' parameter as optional
    and only log it if not None
  - cmdlib._WaitForSync to not log directly to stdout/stderr but via the
    proc.Log(Info|Warning) methods
  - the LU attribute 'processor' is renamed to 'proc' to shorten the
    name

Reviewed-by: imsnah