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Rename ctdb_load_nodes_file to ctdb_load_nodes as it can now load nodes
from more than a regular file.
Signed-off-by: John Mulligan <jmulligan@redhat.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Currently some of this is supported by a periodic check in the
recovery daemon's main_loop(), which notices the flag change, sets
recovery mode active and freezes databases. If STOP_NODE returns
immediately then the associated recovery can complete and the node can
be continued before databases are actually frozen.
Instead, immediately do all of the things that make a node inactive.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14087
RN: Stop "ctdb stop" from completing before freezing databases
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Tue Aug 20 08:32:27 UTC 2019 on sn-devel-184
This is a superset of ctdb_local_node_got_banned() so will replace
that function, and will also be used in the NODE_STOP control.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14087
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Simple cases where variables need to be declared as an unsigned type
instead of an int.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It isn't currently possible to distinguish these 2 cases.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This avoids unnecessary work during recovery to pull records from nodes
that were INACTIVE just before the recovery.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13641
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Monitoring can fail during recovery due to databases (e.g. registry)
being unavailable. This has been avoided by explicitly disabling
monitoring around recovery via the START_RECOVERY and END_RECOVERY
controls. With this approach only there is still a window between
enabling recovery mode and START_RECOVERY when monitoring could be
attempted. However, explicitly disabling monitoring is unnecessary
because monitoring is not done when a node is in recovery.
So remove the explicit disable/enable of monitoring and rely on
monitoring being skipped when recovery mode is active.
The only possible change of behaviour with this change is that there
is now a window between setting recovery mode to normal and the
END_RECOVERY control where monitoring is enabled. However, at this
point databases would be available and the "recovered" event will
cancel any in-progress monitoring.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This allows to differentiate between the two database models.
ctdb_db_persistent() - replicated and permanent
ctdb_db_volatile() - distributed and temporary
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12857
This simplifies the code and avoids complicated conditions.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12857
If the recovery mode is already set to the expected value, there is
nothing to do.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Parallel database recovery freezes databases in parallel and irrespective
of database priority. So drop priority from freeze/thaw code.
Database priority will be dropped completely soon.
Now FREEZE and THAW controls operate on all the databases.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Logging that node has lost election is less useful than knowing which
node has won the election.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Once DB_PUSH_START is processed as part of recovery, push_started
flag tracks if there are multiple attempts to send DB_PUSH_START.
In DB_PUSH_CONFIRM, once the record count is confirmed, all information
related to DB_PUSH should be reset. However, The push_started flag was
not reset when the push_state was reset.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Wed Jun 8 14:31:52 CEST 2016 on sn-devel-144
This makes the API more general. If they are needed in a handler then
they can be in the private data.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will allow a simplification of the cluster mutex API, so the
private data can be registered when calling ctdb_cluster_mutex().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It isn't necessarily a file.
Don't bother changing the control, since it doesn't pervade the code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If the recovery lock setting is not consistent with that of the
recovery master then abort.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Deferred attach processing is done unconditionally at this point. It
is then done again if recovery lock checking is done and completes
successfuly. If the recovery lock checking fails then it should not
be done at all.
Move this processing so it is done with the early exit when the
recovery lock is not being used.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdb_recovery_have_lock(), ctdb_recovery_lock(),
ctdb_recovery_unlock() are only used by recovery daemon, so move them
there.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This means that the cluster mutex handle can now be treated as opaque.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
All of the ctdb_cluster_mutex_* infrastucture can now handle an
arbitrary mutex.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The underlying change is to allow the cluster mutex argstring to
optionally contain a helper command. When the argument string starts
with '!' then the first word is the helper command to run. This is
now the standard way of changing the helper from the default.
CTDB_CLUSTER_MUTEX_HELPER show now only be used to change the location
of the default helper when testing.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is currently just treated as the name of a lock file. However,
it is really some arbitrary arguments to lock helper.
Therefore, it should be parsed and passed as separate arguments to the
lock helper.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Replace the file descriptor for the recovery lock in the CTDB context
with the cluster mutex handle, where non-NULL means locked.
Attempting to take the recovery lock is now asynchronous and no longer
blocks the recovery daemon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Unlike fcntl(2), some other helper might need to explicitly take
action to release a mutex. This can be done by catching SIGTERM.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
