Two more PEP8 fixes

cmdlib: Avoid wrapping using backslash

gnt_group: Avoid ** magic using keyword arguments (the “pep8” tool
doesn't like the inline comment in this case and will complain about
spaces around the “**” operator)

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

check-python-code: Give location(s) of lines longer than 80 chars

Until now it would only say that there was a line longer than 80
characters, but not where.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

PEP8 style fixes

Identified using the “pep8” utility.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Wrap a few long lines

Had to break it as well, today! ;)

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

listrunner: Avoid exception if machine is rebooted

Handle exceptions gracefully when trying to read the command's output.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Remove wrong type declaration from option

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Andrea Spadaccini <spadaccio@google.com>

Fix wrong method name in cluster-merge

Fixed a wrong method name in the last patch.

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Fix --skip-stop-instances help message

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

cluster-merge: Add the --skip-stop-instances opt

This option allows to do a check for running instances on the mergee
clusters instead of stopping them.

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

watcher: Wait for child processes by default

This patch retains the behaviour of ganeti-watcher in previous Ganeti
versions.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Update release date in NEWS for 2.5.0~beta2

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Try 3 times before giving up on per-node commands

When contacting lots of nodes some may fail. Give it a couple more
chances before giving up on them.

Possible future TODO: continue, but just mark them as offline.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Allow retrying commands in cluster-merge

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Add a TODO on the VerifyCluster option

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Transform node readd exceptions into just errors

We are after the point of no return, no point in failing everything
because a node failed to readd. Better to just report it and move on.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Offline node when adding it to a merged cluster

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Bump version to 2.5.0~beta2

Also update NEWS file.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

sphinx_ext: workaround epydoc warning

Similar to commit c29e35f, this works around epydoc breakage by
aliasing the module. Makes 'apidoc' pass again on my machine.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

check-news: Show per-file line number

… not the global line number.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Unify some file headers

Remove unnecessary commas, add empty lines where necessary to make them
consistent.

I'm working on a script to check this, but it's not yet ready.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Makefile: Add design-ovf-support to list of doc files

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

ensure-dirs: Fix epydoc error

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Documentation fix for importing with --src-dir option

Signed-off-by: Agata Murawska <agatamurawska@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

ensure-dirs: Check mode and owner before changing

This avoids many calls to chmod(2) and chown(2), and thereby ctime
updates.

Since I had to update the unittests anyway I untangled the code a bit,
split it into more separate functions and added some more tests.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

ensure-dirs: Refine error handling on stat(2)

The “_stat_fn” function is renamed to “_lstat_fn” to reflect its
function. The try/except block just wraps calling lstat(2) and nothing
else.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

ensure-dirs: Change wording of some messages

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

ensure-dirs: Implement debug logging

There was no logging at all.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

ensure-dirs: Set permissions on job files in queue

This was a regression from 2.4.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

ensure-dirs: Set permissions on queue lock file

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

ensure-dirs: Set correct permissions on ssconf files

The files should be 0444, not 0400. This was a regression from 2.4.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

cfgupgrade: Add confirmation message

A message will be given instead of just dropping the user back to the
prompt in case of a successful upgrade.

[…]
documentation formats). Continue with upgrading configuration?
y/[n]/?: y
Configuration successfully upgraded for version 2.5.0~beta1.
root@master:~#

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Handle network interfaces without IPs

If the user specified a network interface with no IPs, he would receive
an unhelpful "list index out of range" error. Fixed that.

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Fixed potential unreferenced variable usage

I noticed a path in the code that would use spice_ip_version even if
it was not initialized. This patch fixes it.

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Added documentation for gnt-instance remove --force in the man page

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Added documentation for SPICE options in the gnt-instance man page

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Added basic support for SPICE

Implemented the following parameters:
- spice_bind
- spice_ip_version

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

NEWS: Add release date for 2.5.1~beta1

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Fix exit code of “gnt-cluster verify”

With commit fcad7225e3fc4 LU-generated jobs are used, but the
exit code must still be backwards-compatible.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Update NEWS for 2.5

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Small improvements for cluster verify

- Check if BGL is actually owned
- Show group name as feedback

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

watcher: Use locks when querying for resource information

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Allow locking to be used via OpQuery

The original design for query2 specifically excluded locking, but now
it's turned out that it would be a good thing to have in watcher. This
patch adds a new parameter to OpQuery and enables its use in LUQuery. A
missing function is added to LUGroupQuery, a comment clarified in
_NodeQuery and all locks declared as shared acquires in the same LU.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Document job results for RAPI where possible

Some opcodes aren't documented yet.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

opcodes: Add more result checks, add some comments

Some of these will be used by the RAPI documentation.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

sphinx_ext: Allow documenting opcode results

Will be used by RAPI documentation.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

ht: Allow adding comment to type descriptions

This will be used to add some more details to type descriptions, e.g. on
opcode parameters or result values. The implementation is very similar
to “WithDesc”.

I chose to use “[…]” after finding “/*…*/” hard to read and spot. At
some we'll have to introduce proper formatting (e.g. using HTML).

Example with a comment:
  List of ((Length 2) and (Item 0 is (NonEmptyString [name of changed
  parameter]), item 1 is Anything))

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Clarify job ID-related type checks, add unittests

Instead of a rather complicated expression only “JobId” is output. Job
ID lists (like generated by “SubmitManyJobs”) are limited to two-item
lists. Unittests are added.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Change OpClusterVerifyConfig's result, verify results

This patch removes the list of node groups (not used anymore since
commit fcad7225e3fc) from OpClusterVerifyConfig's result and adds result
verification to all OpClusterVerify* opcodes.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Fixed error in Makefile.am, changing spaces with tabs

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Added the test data files for netutils to Makefile.am

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Use LU-generated jobs for verifying cluster

This patch moves the logic for verifying the various node groups in a
cluster into the master daemon. Job dependencies are used to ensure the
configuration, which requires the BGL, is verified first.

With this change it will be possible to expose whole-cluster
verification through the remote API without requiring additional client
logic on top of standard features like LU-generated jobs and job
dependencies.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

opcodes: Use variables for verification parameters

Just some cleanup before the 2.5 release.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

mcpu: Specify actual received type on opcode issue

This helped me debug an issue with opcodes.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Use resource kind as OpQuery*'s description

This gives a hint as to what's queried. “QUERY(instance)” or
“QUERY(node)” are way better than just “QUERY”.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Added helper functions in netutils and related constants

Added the following functions to netutils:
- IsValidInterface
- GetInterfaceIpAddresses
- _GetIpAddressesFromIpOutput

Added the following static methods to netutils.IPAddress:
- GetAddressFamilyFromVersion
- GetVersionFromAddressFamily

Added unit tests for the new methods in netutils.IPAddress, for the IP
address search regex and for GetInterfaceIpAddresses

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Fix epydoc error in rlib2.py

I blindly assumed epydoc would use normal reST, but turns out it uses
its own “epytext” in our configuration. Since the latter doesn't support
blockquotes, I just make the paragraph a literal block.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Fix typo in rlib2's docstring

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Benjamin Lipton <benlipton@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Documentation fixes and clarification

- In README, refer to “install.rst”, not “install.html”
- In rapi.rst, wrap line longer than 72 characters
- In rlib2.py, update and clarify description of POST vs. PUT

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

gnt-instance: Rename _SHUTDOWN_* to _EXPAND_*

Once upon a time these constants were only used for stopping instances,
but pretty soon they became more useful. Let's rename them.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

List returned fields in RAPI documentation

Also replace console types with constants.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

rlib2: Exclude oplog/opresult from bulk job list

These fields can get rather large. Excluding them from the big bulk list
reduces the amount of data. They are still available via per-job
requests.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

rlib: Expose node group tags

Commit 1ffd26739d3 added support for tagging node groups. Also add a
check for exposed fields.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

rapi: Bulk support for jobs

This was requested in issue 181.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Fixed an error in the documentation of _GetKVMVersion

Fixed an epydoc compilation error that I introduced with last commit.

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Mention globbing filters in ganeti(7) manpage

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Removed code duplication for calls to _GetKVMVersion

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Fix epydoc breakage caused by f8638e288c7a

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Changed NET_PORT_CHECK to REQ_NET_PORT_CHECK, to improve consistency

I originally made this change because I needed the OPT_NET_PORT_CHECK,
and I am committing it even if I don't need anymore OPT_NET_PORT_CHECK
because IMO it improves the consistency of the name of the wrappers.

Also, I changed the code of the check to use inequality operators
chaining.

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Added check for the ip command at configure time

Also, corrected a few places where the ip command was hardcoded.

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Detect globbing patterns as query arguments

Short: this patch enables the use of “gnt-instance list '*.site'”.

Detailed description: This patch changes the command line interface code
to try to deduce the kind of filter from the arguments to a “list”
command. If it's a list of plain names an old-style name filter is used.
If filtering is forced or the single argument is potentially a filter,
it is parsed as a query filter string. Any name looking like a globbing
pattern (e.g. “*.site” or “web?.example.com”) is treated as such.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

cluster-merge: implement params delta mercifulness

Sometimes it's good to tell the user about parameter differences but
then proceed anyway. Strictness is still enforced for those parameters
that would break the cluster (volume group name, storage dir if file
storage is enabled).

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

cluster-merge: consider file storage enable state

There's no point in checking whether the file storage dir in the two
clusters is the same if file storage is not even enabled

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Allow fixing of split instances via relocate

Currently, the IAllocator code requests strictly that the (set of) groups of
the nodes we're relocating from is equal to the set of groups we're
relocating to.

This, however, makes is impossible to fix split instances, since (by
definition) the secondary of a split instance is not in the same group
as the primary node, and after the fixing is it the same.

The patch changes the test from group equality to check that the final
group set (across both primary and secondary nodes) is a subset of the
initial group set (again across both nodes). This means we can't
"extend" the group of nodes but keeping the same or decreasing it is
allowed.

After this patch, one can finally fix (automatically) split instances
via a gnt-instance replace-disks.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Revert deprecation of evacuate mode in hail

As discussed offline, the new node-change mode could be used for
evacuation, but it's not directly useful as it returns a list of
opcodes; therefore, we need to partially revert commits fbe5fcf and
5b53ca7 that removed it (and multi-evacuate, which remains removed).

The new version of relocate is actually just a wrapper over the
tryNodeEvac (which does the node evacuate); we run that and then we do
some extra checks that the nodes we got from that function are
consistent with the instance's new state.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Further cleanup after multi-evacuate removal

Commit f0edfcf6 removed the parsing of multi-evacuate result, but the
code went from:

  if mode in (multi-evac, relocate):
    …
    if mode == relocate:
      …

to:

  if mode == relocate:
    …
    if mode == relocate
      …

This patch simply removes the nested if.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Fix bug in IAllocator parsing of Evacuate result

Commit 342f9172 added stricter checks for the iallocator result in
evacuate mode, but it does this irrespective of the result
status. When the result has failed and (according to the design) the
list of nodes is empty, this code will trigger the following:

    node1# gnt-instance replace-disks -I hail instance14
    Failure: command execution error:
    Groups of nodes returned by iallocator () differ from original groups (default)

After the patch, the result is:

    node1# gnt-instance replace-disks -I hail instance14
    Failure: prerequisites not met for this operation:
    error type: insufficient_resources, error details:
    Can't compute nodes using iallocator 'hail': Request failed: …

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Implement globbing operator for filters

The operators “=*” and “!*” do globbing in filters, e.g.:

$ gnt-instance list --no-headers -o name 'name =* "*.site"'
inst1.site.example.com

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Zero DRBD metadata before creation

The docstring of the DRBD8 class says:

  … The meta device is checked for valid size and is zeroed on create.

which is not done today, hence we have
http://code.google.com/p/ganeti/issues/detail?id=182:

  node1# mkreiserfs -f /dev/xenvg/t8
  …
  ReiserFS is successfully created on /dev/xenvg/t8.
  node1# drbdmeta --force /dev/drbd256 v08 /dev/xenvg/t8 0 create-md
  md_offset 0
  al_offset 4096
  bm_offset 36864

  Found reiser filesystem

  This would corrupt existing data.
  If you want me to do this, you need to zero out the first part
  of the device (destroy the content).
  You should be very sure that you mean it.
  Operation refused.

I've tested and even just 1MB is enough to wipe the meta, but let's be
safer and pass a 'clean' meta to drbd.

Note: I didn't copy _WipeDevice from backend.py since it seemed more
complex than needed here.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Remove iallocator's “multi-evacuate” mode

It is no longer used and has been deprecated in 2.5.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

confd.querylib: Remove long-deprecated query mode

This was never used by a stable version.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Add docstring to cmdlib.TLReplaceDisks._FindFaultyDisks

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

watcher: Fix breakage caused by 9bb69bb52fb9

The first argument to str.split is the separator, not the maximum number
of splits.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

LUGroupVerifyDisks: Use _CheckInstanceNodeGroups' result

… instead of getting the list of instances once again from the
configuration.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

cmdlib: Factorize checking node groups' instances

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Include hooks.rst in version check

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Bump version to 2.5.0~beta1

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

watcher: Write per-group instance status, merge into global one

Each per-group watcher process writes its own instance status file. Once
that's done it tries to acquire an exclusive lock on the global file and
will proceed to read all status file, merging them based on each file's
mtime. If an instance is moved to another group, the newer status will
supersede that of an older file which hasn't yet been updated.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

cleaner: Remove watcher's instance status file after 21 days

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

utils.ReadFile: Add pre-read callback

This will be used by the watcher to store the file's fstat(2). It must
be done from the filehandle.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Merge branch 'stable-2.4'

Signed-off-by: René Nussbaumer <rn@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Bumping version to 2.4.3

Signed-off-by: René Nussbaumer <rn@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Fixed a typo in utils/process.py

Signed-off-by: Agata Murawska <agatamurawska@google.com>
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Fix unittest failure after list_owned changes

We just need an object that has a list_owned method.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Remove 15-second sleep from LUInstanceCreate

Remove 15 second sleep when wait_for_sync is not set. LUInstanceCreate already
calls _WaitForSync with oneshot=True, which already performs an internal
wait-loop for disks to start syncing.

Signed-off-by: Apollon Oikonomopoulos <apollon@noc.grnet.gr>
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Add a readability alias

lu.glm.list_owned becomes lu.owned_locks, which is clearer for the
reader.

Also rename three variables (which were before named owned_locks) to
make clearer what they track.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Fix broken object references in docstrings

The module is called “objects”, not “object”.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Add “gnt-instance change-group” command

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Add opcode to change instance's group

This is quite similar to evacuating a group, but the locking
is different.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Factorize checking instance's node groups

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Update the NEWS file for 2.4.3

Signed-off-by: René Nussbaumer <rn@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>