* next: (34 commits)
  watcher: automatically restart noded/rapi
  watcher: handle full and drained queue cases
  rapi: rework error handling
  Fix backend.OSEnvironment be/hv parameters
  rapi: make tags query not use jobs
  Change failover instance when instance is stopped
  Export more instance information in hooks
  watcher: write the instance status to a file
  Fix the SafeEncoding behaviour
  Move more hypervisor strings into constants
  Add -H/-B startup parameters to gnt-instance
  call_instance_start: add optional hv/be parameters
  Fix gnt-job list argument handling
  Instance reinstall: don't mix up errors
  Don't check memory at startup if instance is up
  gnt-cluster modify: fix --no-lvm-storage
  LUSetClusterParams: improve volume group removal
  gnt-cluster info: show more cluster parameters
  LUQueryClusterInfo: return a few more fields
  Add the new DRBD test files to the Makefile
  ...

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

This is simply a version bump, no changes from rc5.

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

This patch makes the watcher automatically restart the node and rapi
daemons, if they are not running (as per the PID file).

This is not an exhaustive test; a better one would be TCP connect to the
port, and an even better one a simple protocol ping (e.g. get / for rapi
and a rpc_call_alive for noded), but since we don't know how they've
been started we can't implement it today. rapi would need to write the
SSL/port to a file, and noded something similar, so that we know how to
connect.

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

Currently the watcher is broken when the queue is full, thus not
fulfilling its job as a queue cleaner. It also doesn't handle nicely the
queue drained status.

This patch does a few changes:
  - first archive jobs, and only after submit jobs; this fixes the case
    where the queue is already full and there are jobs suited for
    archiving (but not the case where the jobs all too young to be
    archived)
  - handle nicely the job queue full and drained cases—instead of
    tracebacks, log such cases nicely
  - reverse the initial value and special cases for update_file; we now
    whitelist instead of blacklist cases, since we have much more
    blacklist cases than vice versa, and we set the flag to True only
    after the run is successful

The last change, especially, is a significant one: now errors during the
watcher run will not update the status file, and thus they won't be lost
again in the logs.

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

Currently the rapi code doesn't have any custom error handling; any
exceptions raised are simply converted into an HTTP 500 error, without
much explanation.

This patch adds a couple of generic SubmitJob/GetClient functions that
handle some errors specially so that they are transformed into HTTP
errors, with more detailed information.

With this patch, the behaviour of rapi when the queue is full or
drained, or when the master is down is more readable.

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

Commit 67fc3042 added some more
variables to be exported to OSEnvironment, but it has two bugs:
  - wrong variable name (env vs. result)
  - in OSEnvironment we don't have the automatic converstion to strings
    that we do in hooks, so we must manually enforce this

With this patch instance creations work again.

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

Currently the rapi tags query implementation is similar to the command
line one: it submits OpGetTags jobs. This not good, since this being an
API it can be used a lot and can pollute the job queue with many such
trivial jobs.

This patch converts it to use either queries (for nodes/instances) or
direct read from ssconf (for the cluster case). For ssconf, we added a
function to the ssconf.SimpleStore class for reading the tags.

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

Currently, if the instance is stopped, we still check for enough memory
on the target node. This is a little bit too strict, since in case too
many nodes have failed and one is out of the memory, this prevents
fixing the cluster (with the instances down).

We change it to do the memory checks only when the instance will be
started.

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

Currently we miss in hooks the instance's hypervisor, hypervisor
parameters and backend parameters. This forces hooks to query back into
ganeti, which is dangerous due to possible luxi sockets exhaustion.

This patch adds these three as INSTANCE_HYPERVISOR, INSTANCE_HV_*,
INSTANCE_BE_*. The hook environment prefixes all keys with “GANETI”, so
a default settings for a xen-pvm instance would be:

  GANETI_INSTANCE_HV_initrd_path=
  GANETI_INSTANCE_HV_kernel_args=ro
  GANETI_INSTANCE_HV_kernel_path=/boot/vmlinuz-2.6-xenU
  GANETI_INSTANCE_HV_root_path=/dev/sda1

Any dashes in parameter names are changed to underscores, since
variables with dashes are not easy to access from the shell
(alternatively we could deny those via an unittest for constants.py).

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

Signed-off-by: Guido Trotter <ultrotter@google.com>

This patch modifies the watcher to keep on-disk a file with the instance
status; this can be used from outside of ganeti to react to instances
being down (when the watcher cannot restart them).

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

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

Currently we have bad behaviour in SafeEncode:
  - binary strings are actually not handled correctly (ahem)
  - the encoding is not stable, due to use of string_escape

For this reason, we replace the use of string_escape with part of the
code of string escape (PyString_Repr in Objects/stringobject.c); we
don't escape backslashes or single quotes, since that is that makes it
nonstable. Furthermore, we only use the encode('ascii', ...) for unicode
inputs.

The patch also adds unittests for the function that test basic
behaviour.

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

This patch adds constants for the mouse and boot order strings; while
there are still some issues remaining, we're trying to cleanup hardcoded
strings from the hypervisors.

Since the formatting of frozensets is currently wrong, we also add an
utility function for this and change all the error messages to use it.

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

Bugs in either our code or in associated libraries can bring the master daemon
down, and this (due to the 2.0 architecture) stops all work on the cluster.

Since the watcher already does periodic checks on the cluster, we modify
it to try to start the master automatically in case of failures to
connect. This will be tried only once per cycle.

Also, in this case, we modify the code so that the watcher status file
is not updated - its timestamp will reflect thus the time of last
successful connection to the master.

Side note: the except errors.ConfigurationError part could be cleaned
up, since in 2.0 we don't usually get that directly, and if we do it's
an error and we shouldn't touch the file anyway; but that is not a rc5
change.

Signed-off-by: Iustin Pop <iustin@google.com>

This patch adds for current instance a ‘disk_space_total’ key, similar
to the key for the new instance in case of new allocations.

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

This patch modifies the start instance script, opcode and logical unit
to support temporary startup parameters.

Different from 1.2, where only the kernel arguments were supporting
changes (and thus xen-pvm specific), this version supports changing all
hypervisor and backend parameters (with appropriate checks).

This is much more flexible, and allows for example:
  - start with different, temporary kernel
  - start with different memory size

Note: in later versions, this should be extended to cover disk
parameters as well (e.g. start with drbd without flushes, start with
drbd in async mode, etc.).

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

This patch modifies the rpc.call_instance_start - the master side - to
take optional hv/be parameters. The noded side is unchanged and
oblivious to the change.

This will allow implementation of single-user capability and such on
startup (temporary, as opposed to permanent).

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

Currently QueryJob returns "None" when a wrong job ID is passed.
Handle this in gnt-job list, by printing an error for each wrong job,
and still giving output for all the jobs which actually do exist.

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

If the remote info rpc call fails we can't assume that the instance is
up.

Signed-off-by: Guido Trotter <ultrotter@google.com>

Signed-off-by: Guido Trotter <ultrotter@google.com>

Currently doing a gnt-cluster-modify --no-lvm-storage is silently
ignored, as it passes a None value in vg_name, which is the same as not
modifying that parameter. Explicitely set the passed value to '', so the
non-true not-None value can be evaluate to actually remove a volume
group.

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

Currently LUSetClusterParams will remove the volume group if the vg_name
field passed in is not true, but not None. Setting the target volume
group to False or the empty string, though, is a bad idea because it's
not a boolean value, and at cluster init we set it to None if
--no-lvm-storage is passed. With this fix we handle '' (or any other
non-None false value) as the "unset" value, but actually store None in
the config.

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

Even if we cannot modify all of them, they are useful information about
the current cluster.

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

Some fields can be set at cluster init, and perhaps even modifed with
SetClusterParams but there's no way to know them. With this patch we
export them in the cluster info query.

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

Currently the KVM hypervisor returns strings for the memory and cpu
values, while the xen hypervisor returns integers. Making this uniform
converting the values to integers in KVM as well.

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

LUSetInstanceParam currently assumes that the 'memory' value of a
call_instance_info result is an integer, while the rest of the code
explicitely converts it to int(). Converting it to int works around a
bug which prevents changing the memory allocation of a live instance if
the remote call returns the memory in string format.

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

These were forgotten in commit 01e2ce3a,
and caused “make distcheck” to fail.

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

In Ganeti 1.2, “none” was used to signify no initrd. In 2.0 we have
changed to “no_” as a prefix (i.e. “-H no_initrd_path”) and thus we
document in the manpage this.

The QA suite is changed accordingly.

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

The _TransformPath function is not used anymore in 2.0, let's remove it.

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

Patch for adding network_port to the instance attributes exported by the
RAPI.

[iustin@google.com: slightly changed the formatting]
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Minor patch to clarify the URL necessary for accessing the RAPI.

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

The version is 2.0, and we don't build PDFs by default, only HTML
files.

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

This is for Python 2.6 compatibility.

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

The Python interpreter used to run the test cases is hard-coded to be
/usr/bin/python. If we use the first one from $PATH instead, it is
much easier to test ganeti with other Python versions.

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

These can be set in the defaults file, default to no arguments being
passed, and make it easy for local installation to customize the way the
ganeti daemons are called.

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

In the example init script we'll execute an optional defaults file to
make it easier to add local customizations to the ganeti startup.

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

Currently two of the ;; ending the case bodies are not indented with
anything. Reindent all of them to the body of the loop, as it's done
somewhere else in the init script.

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

Python 2.6 complains about module 'sha' being deprecated. It makes
execution of Ganeti commands a bit annoying, and when you run
'ganeti-watcher' in cron jobs, you get a mail message after every
execution.

Tests pass under under Python 2.6 and Python 2.4.

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

Python 2.6 complains about module 'sha' being deprecated. It makes
execution of Ganeti commands a bit annoying, and when you run
'ganeti-watcher' in cron jobs, you get a mail message after every
execution.

Tests pass under under Python 2.6 and Python 2.4.

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