Since 8.0.6 and lower have issues that break Ganeti's usage of drbd,
this patch notes the required version of DRBD.

Reviewed-by: ultrotter

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 adds some information about the new ‘verify-disks’ command.

Reviewed-by: imsnah

This patch modifies the watcher to run the ‘gnt-cluster verify-disks’
command and to log its output (if any).

Reviewed-by: 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: 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

Reviewed-by: imsnah

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

Reviewed-by: schreiberal

Reviewed-by: iustinp

Reviewed-by: schreiberal

Reviewed-by: iustinp

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

lexgrog cannot parse the current ganeti-os-interface.7 manpage, which in turn
leads to a lintian warning. In order to fix this the NAME section must have the
standard format which doesn't allow multiple words in the first field.

Reviewed-by: iustinp

Reviewed-by: imsnah

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

Reviewed-by: ultrotter

We want the name of the example OS to be nicer for packagers, so update
the install documentation accordingly.

Also, put in a notice about using the latest release OS version, so if
we forget to update this doc, we are not completely wrong.

Reviewed-by: schreiberal

This reverts commit 397, as the support in autoconf for docdir is
present since 2.59c, and this is too new for some distributions.

Reviewed-by: imsnah

This patch adds checking for our external python modules at the
./configure stage, as it's better to check than rely on documentation.

The patch adds one autoconf macro from the autoconf macro archive
(http://autoconf-archive.cryp.to)

Reviewed-by: imsnah

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

Reviewed-by: schreiberal

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

Reviewed-by: iustinp

This patch adds a simple man page for the master startup script and
modifies the footer.sgml fragment to include it.

Reviewed-by: imsnah

The /var/run directory can be a tmpfs mount, so even if we make it at
install time (or include it in the package) it can go away. Therefore,
test for its existence and create it in the startup script.

Reviewed-by: imsnah

The docdir variable is defined by autoconf, so we don't need to define
it ourselves. This way, the target documentation directory can
be changed via ./configure instead of patching Makefile.am.

In truth, we should install the pdf and html files using the pdf and
html targets, since configure defines pdfdir=htmldir=docdir; but
installing them in docdir is good enough.

Reviewed-by: imsnah

Reviewed-by: schreiberal

This may help to debug problems in QA tests.

Reviewed-by: schreiberal

Reviewed-by: iustinp

Reviewed-by: iustinp