This allows users of the RAPI client to catch GanetiApiError for all HTTP
errors.

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

Currently they return a 500 Server Error, not really useful
for detecting nonexistent items.

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

Ganeti errors should also be logged with a backtrace.

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

Inter-cluster instance moves need the disk template. As they run
LUQueryInstanceData to get an instance's details, the disk template
must be returned.

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

GetInstanceInfo should return the resource /2/instances/$name/info,
but so far it returns /2/instances/$name. The same applies to
GetNodeInfo, which returns /2/nodes/$name. Both names are stripped
of their “Info” suffix and a new method, GetInstanceInfo, is added
for /2/instances/$name/info. There's no equivalent for nodes.

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

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

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

This also updates a comment in the unittest for utils.py. We unittest
the new function for two things: correct reporting on real case (for
localhost), and correct reporting with a mocked-out TcpPing that returns
false.

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

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Luca Bigliardi <shammash@google.com>

Remove duplicate code between a couple of asyncore related function by
having a function in charge of handling EINTR errors. Unittests included.

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

By overriding the default asyncore handle_error (which closes the
socket) with our own version, which logs what happened but tries to
proceed, we can get rid of a couple of try/except blocks. The resulting
churn is deindentation of the internal code.

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

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

While mlock on noded is definitely good in most situations, there are
some - namely my laptop - where it has no benefit, and uses precious
non-swappable memory. To avoid this we make it optional, with a new
--no-mlock option. Note that only the main node daemon and its http
children are affected: the powercycle node child still uses mlock, which
doesn't harm, since it's a short lived process happening just before
node reboot anyway. The manpage is updated.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Luca Bigliardi <shammash@google.com>

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Luca Bigliardi <shammash@google.com>

Disable warnings for:
- except Exception,
- use of __errno_location,
- redeclaration of handleError()

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Fix this pylint warning:
[W6501, Mlockall] Specify string format arguments as logging function parameters

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Fix typo spotted by pylint:
E1101:2095:LogFileHandler.handleError: Module 'logging' has no 'Filehandler' member

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

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

Currently this only supports the new instance creation request data
format version 1, but support for the old version can be easily
implemented.

Most arguments are optional and documented in the RAPI documentation.

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

As mentioned in commit d975f482, the current way of creating an
instance via RAPI is not very flexible. With this patch, a new
instance creation request data format is introduced and documented.
Support can be detected by checking the list of features returned
by the /2/features resource for the value "instance-create-reqv1".

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

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

Also add a separate function to retrieve body parameters. Having
it separate (independent of a class instance) will make it easier
to unittest users of this function.

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

The /2/features RAPI resource can be used to detect optional
features implemented by the RAPI server. This will be used
to recognize servers implementing a new request format for
instance creation requests.

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

Node daemon logs will be printed on system console if writing on the log file
fails.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Add a parameter to SetupLogging to use LogFileHandler (default is off)

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Add a log handler class which logs to /dev/console in case of logging errors.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Add Mlockall() utility to lock current process' virtual adress space into RAM.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

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

The way the resource /2/instances expects its request data (e.g.
instance name, disks, NICs) to be formatted in a dict is not
very extensible. HV and BE parameters are interleaved with all
other values. In commit 495cfdf0 a new parameter “mode” was added
which can be misunderstood as the instance creation mode, but is
actually a mode for the network interface.

Short of bumping the whole RAPI version (currently 2), which would
involve many, many other changes and potentially break clients,
we can not change the request format easily as it needs to stay
backwards and future-compatible as far as possible. This is not an
internal API, but one used by several external applications.

By introducing a data format version per request, we can still
support the old request format, and thereby not break existing users,
while we can add a more flexible request format which will, for
example, support multiple NICs and move HV/BE parameters to separate
containers, avoiding conflicts.

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

For passwords we require strict oneliners, we're a bit more lax with pid
and uid files.

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

Read the first non-empty file line. When strict is set, abort if more
than one line is non-empty. Some unittests inspired by the reverted ones
from commit b774bb10, and some new ones.

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

This partially reverts commit b774bb10.
Unittests unrelated to that particular functionality but introduced in
that commit are left untouched. Since the temporary directory is now
only used to check for a non-existing file, it is removed as well, and
a convenient very-very-unlikely-to-exist file is used instead.

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

The 0.7 version was just an example, but since we're on 0.9 now,
updating the number cannot be wrong. The new admonition helps KVM users
to configure debootstrap correctly so that instances can be shutdown
cleanly.

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

Xen: Just specify 3.0 or above as a requirement, as versions above 3.1
have been tested and work fine with Ganeti. Also note that the Xen
dependency is optional, if one wants to work with KVM.

KVM: list as an alternative, specify that 72 (the one shipped with
lenny) is the bare minimum, but newer qemu-kvm is recommended.

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