Having only one exception hierarchy makes catching them simpler. Before
ProtocolError would derive directly from Exception, but with this patch
it'll also be in the hierarchy defined by the ganeti.errors module.
Separating encoding and decoding errors is not necessary at this point
as they're never handled separately, and merging them removes a few
lines from the code.

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

* devel-2.1: (40 commits)
  Fix unused imports or add silences where needed
  bdev: Add a TODO and a pylint silence
  confd: add a TODO and a pylint disable
  pylint: Temporarily disable W0201
  Disable R0922 in pylint
  Further pylint disables, mostly for Unused args
  pylint: disable the similarities checker
  LUDiagnoseOS._DiagnoseByOS: remove unused arg
  daemons: handle arguments correctly and uniformly
  hv_xen/_GetConfigFileDiskData: remove unused arg
  jqueue/_CheckRpcResult: log the whole operation
  Optparse extenders have to obey a given API
  backend._OSOndiskAPIVersion: remove obsolete arg
  pylint cleanups: dangerous initializers
  Convert to static methods (where appropriate)
  Remove more unused variables
  Add targeted pylint disables
  burnin: move decorators out of classes
  Rename an ConfdInotifyEventHandler init argument
  Introduce a makefile lint rule
  ...

Conflicts:
	daemons/ganeti-confd  - removed imports
	daemons/ganeti-noded  - fixed new GenericMain

In some cases pylint doesn't parse the import correctly, so we add
silences; but there are also many cases of unused imports, which we
simply remove.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

A piece of old code in bdev.py uses a for loop over a single variable
because we can 'break' out of the loop or exit on the 'else' path. This
is not a nice usage of the for loop, it should be converted to a
standard if...elif...else structure.

In the meantime we silence a warning from pylint (it is actually
invalid, IMHO) and add a TODO.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Two variables are used in a strange way in ExecConfd. Until that is
clarified, add a TODO and a silence for the unused variable warning.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

There seems to be a bug in pylint relating to W0201 (“Attribute '%r'
defined outside __init__”) being re-enabled by simple comments and not
being able to be disabled again.

Until that is fixed, we disable this warning.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

R0922, “Abstract class is only referenced 1 times”, cannot be disabled
in the source code, and thus
lib/http/auth.py:HttpServerRequestAuthentication gives this warning
(it's actually also referenced from the tests, but we do not include
them).

Therefore we need to disable it at pylintrc level.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Many of our functions have to follow a given API, and thus we have to
keep a given signature, but pylint doesn't understand this. Therefore,
we silence this warning.

The patch does a few other cleanups.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This is a very slow checker, estimated to be O(n²) by its author; so
using it all the time is not good. It can be re-enabled on the command
line via “--disable-checker=”.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

The node_list argument to _DiagnoseByOS is not used, and is obsoleted by
the fact that the rlist argument already has the valid nodes as keys
(assuming RPC behaviour didn't change). Thus, we remove it and silence
the warning.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Of all daemons, only rapi did abort when given argument. None of our
daemons use any arguments, but they accepted them blindly. This is a
very bad experience for the user.

This patch adds checking and exiting in all daemons, in a uniform way.
One other option would have been to add a flag to GenericMain
(noargs=True).

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

The disk template is not needed, all that's used is the disk data. As
such, remove this parameter from the function.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Currently only the rpc call, but not its description (which also shows
the argument) is logged. We change this to log failmsg too, and this
also silences a warning.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

So we just silence the warning.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

The 'name' argument is not used anymore, probably since before 2.0.
Since this is an internal function, we can just remove it (from its
caller too).

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Plus a silence for a wrong "uninitialized var".

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Many methods are simple pure functions, and not depending on the object
state. We convert these to staticmethods.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This removes unused variables in the rest of the code (outside lib/).

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This patch should have only:

- pylint disables
- docstring changes
- whitespace changes

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Similar to commit c881c5, we move the decorators out of classes, such
that they become simple functions instead of methods. This more clean,
since only the wrapped functions need to be methods/have access to
‘self’.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

'file' is a builtin keyword/type. Like many others, it should not be
used as a variable/argument name.

No code is actually passing in this argument so renaming it is simple.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This runs pylint over all the python files. Yes, it takes a long while,
but it's the only way to properly analyze the source codes as only in
this way pylint can see all uses of the various modules/classes/etc.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

The chroot and fake hypervisors were missing:

- the powercycle node functionality
- proper handling of migration requests

The powercycle was just used as in the other hypervisors (use the
standard linux powercycle). The migration for chroot was disabled
explicitly, whereas for the fake one it was implemented to simulate
correctly. This required some work on the fake hypervisor, but now the
implementation of start/stop/etc. is much more clean.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This adds targeted pylint disables, but since _autoconf.py is
autogenerated we need to do this in Makefile.am (hence the separate
patch).

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

We don't get any useful out of this - a git grep is as effective, and
these only pollute the pylint output.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This patch adds explicit errors (instead of notimplemented) in
FileStorage (and the associated TODOs).

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Wrong argument name and wrong number of arguments in string formatting.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This patch abstract the check "is instance stopped" into a separate
function, and thus simplifies a couple of higher-level functions. It
also moves from manual read of the pidfile to use the (correct
abstraction of) _InstancePidAlive.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

In some cases we only need the pidfile, but not the pid or the alive
status.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Detected by an 'Unused variable' warning.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Note there are some cases left which need extra cleanup.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

The logging functions expand the arguments themselves, thus it's safer
to let them do it rather than manual string formatting.

Also re-wraps one comment.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

* devel-2.0:
  Fix indentation in hv_kvm
  Implement BuildHooksEnv for NoHooksLU
  Clarifiy some more wide pylint disables
  Fix two bugs in seldom-used codepaths
  Update pylintrc
  Add targetted pylint disables
  Partial cherry-pick of 6c881c52 from the 2.1 branch
  Add a release script
  Fix a typo in the doc string

Conflicts:
	lib/cli.py
	lib/cmdlib.py
	lib/hypervisor/hv_kvm.py
	lib/jstore.py
	lib/locking.py
	lib/mcpu.py
	lib/rapi/rlib2.py

Many of the conflicts were on code removed from 2.1, so the resolving was
trivial.

Per pylint warnings.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This just adds a stub function that raises an assertion error; this
accomplishes two things:

- silences many pylint warnings
- if we ever stumble upon this, a specific assertion error is
  (hopefully) clearer than just a not implemented error

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This removes/updates some module-wide pylint disables.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

New version of pylint, new bugs found!

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

Since the current pylintrc is in now way good for our style, we update
it:

- remove docstring checks, since we have too many cases where a
  docstring doesn't make sense
- relax naming rules to cover more alternatives (but not break the
  naming rules)
- increase many of the limits

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

This patch adds targeted pylint disables, where it makes sense (either
due to limitations in pylint or due to historical usage), and also a few
blanket ones in rapi where all the names are… “different”.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>