This patch cleans up  the Haskell library detection and defaults.

First, it makes the base compiler/libraries required, per the email discussion.

It then adds two new small autoconf macros, on to check for a required
Haskell library and one to do custom action based on test results. We
use these macros to cleanup and simplify a bit the module detection:

- rapi, confd, and split query are auto detected and enabled if _all_
  required libraries are present
- unittests are enabled if _all_ required libraries are present

The patch also updates the documentation regarding required libraries.

After this patch, base Ganeti fully buildable on Debian Squeeze/Ubuntu
Lucid.

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

We try to automatically enable the htools-rapi and split query (if
confd and htools-rapi are enabled) options. This is our intended
default configuration, and allows easier test of the new code
path. Further cleanups for checking whether confd can be enabled will
come later.

The move block is due to the fact that we first have to check for
htools-rapi, and only then we can auto-enable the feature.

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

This will need some more configure.ac checks for required libraries,
which will come later with the Haskell dependencies reorganisation.

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

Some parts of the code still use a hardcoded user name: root. This patch
replaces all with a constant specified at build time. The end goal is to
make it possible to run a Ganeti cluster without any special privileges
(of course this will prevent some functionality from working).

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

This is needed for virtual clusters where a non-root user is used to run
the daemons.

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

And expand cli.GetClient() to allow opening the query socket, instead
of the main master socket.

Finally, enable the query socket use in gnt-cluster version, since
that is already implemented fully in Queryd.hs/hconfd.

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

Phew, it wasn't easy, but…

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Bernardo Dal Seno <bdalseno@google.com>

This is a trivial release, with just bug fixes, so a small change log.

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

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

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

Signed-off-by: René Nussbaumer <rn@google.com>
Reviewed-by: Agata Murawska <agatamurawska@google.com>

Signed-off-by: René Nussbaumer <rn@google.com>
Reviewed-by: Agata Murawska <agatamurawska@google.com>

Commit 8a69b3a8 changed the DRBD barriers disabled by default if
“--disable-drbd-barriers” is used to “bfd”, where “d” stands for
disk-drain. DRBD's upstream updated their documentation[1] to
say disk drains should always be used.

[1] http://git.drbd.org/?p=drbd-8.3.git;a=commit;h=f952dcfed57acf



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

I've added the changes under beta1, not beta2, since it's easier to
keep it separate.

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

Currently, the lint target does a sequential: pep8, pylint, pylint on
the QA sources. hlint is run only when explicitly requested.

This patch reorganises the lint target by:

- splitting the current lint target into separate pylint (slow),
  pylint-qa (fast), pep8 (fast) targets
- making lint itself depend on the above plus hlint
- both pep8 and hlint are optional, based on whether the said binaries
  were detected at configure time

make -j is slightly faster after this patch (1m18s → 1m7s).

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

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

This is needed so we can specify the xen command upon configure time

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

Finally!

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

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

Also update NEWS file.

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

If GHC_PKG_QUICKCHECK contains multiple values, the test would fail
with “too many arguments”.

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

We switch from vmlinuz-2.6-… to vmlinuz-3-…. To do this nicely, we
also add a ./configure-time setting for the KVM instance kernel.

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

This patch changes configure.ac Makefile.am so that the user can pass:

- --disable-confd (or --enable-confd=no) to disable it completely
- --enable-confd=yes or --enable-confd=python to select the
  traditional implementation (this is the default setting)
- --enable-confd=haskell to select hconfd

The only "not nice" thing is that I've chosen to keep the
hconfd.hs/hconfd name, and we rename it after install via an
install-exec-hook. The other choice is possible too (to rename the
source file/binary).

One additional note is that if we select haskell, the _rule_ for
creating daemons/ganeti-confd dissapears; whereas if we select python,
the rule for htools/hconfd still exists (one can build it explicitly),
it just is not installed. This is due to the different way in which
the rules are declared.

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

By accident, commit a002ed79 introduced the qemu-img checks in the
htools block. I found this also by mistake while investigating
another issue :)

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

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

A later, more complete patch, will allow selecting between either the
Python version or the Haskell version. This is just a temporary
solution to help building without all the needed Haskell libraries.

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

Tests ending in "-runasroot" or "-runasroot.py" are run through fakeroot,
so activity that needs root privileges can be tested.

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

Add the disk-barriers and meta-barriers parameters described in the
design doc.

constants.py:
* add the needed LD and DT-level parameters, use the defaults provided
  at ./configure time;
* add constants representing which barriers should be disabled and the
  set of valid options.

lib/bdev.py:
* factor the barriers handling code to a class method, for testing
  purposes;
* implement the more granular version checking logic;
* use the LD level parameters;
* add stricter check on DRBD version (8.0, 8.2 or 8.3), as we do not
  support 8.4 yet.

lib/cmdlib.py:
* translate DT level parameters to LD level ones.

configure.ac, Makefile.am:
* set both disk and meta barriers parameters depending on the value of
  --enable-drbd-barriers.

test/ganeti.bdev_unittest.py:
* unit tests for the code that sets DRBD barrier parameters depending on
  the version.

doc/design-resource-model.rst:
* reword the description of meta-barriers;
* change all disk parameters names to use dashes instead of underscores.

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

configure.ac:
* change the documentation of --with-lvm-stripecount parameter to
  reflect the change

doc/design-resource-model.rst:
* change drbd/stripes to drbd/data-stripes and drbd/metastripes to
  drbd/meta-stripes

rest of files:
* add the plain/stripes, drbd/data-stripes and drbd/meta-stripes disk
  parameters

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

Doesn't do anything yet.

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

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

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

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

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

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

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: Iustin Pop <iustin@google.com>

This was overlooked in the review, sorry.

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