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This groups function prototypes for common client/server functions in
common/common.h and removes them from ctdb_private.h.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This groups function prototypes for system specific functions in
common/system.h and removes them from ctdb_private.h.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Wed Oct 28 15:59:02 CET 2015 on sn-devel-104
This was part of libctdb which has been removed.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Currently only Samba is built with CTDB and since CTDB headers are not
public any more, no other application can build with CTDB. So define
CTDB_SOCKET only during build.
In future CTDB will have public API and proper way of figuring out
CTDB_SOCKET.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
The databases are repacked automatically during vacuuming when the
freelist size grows beyond configured threshold (RepackLimit).
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Centrally define all the default capabilities to make the defaults
crystal clear. Capability-related command-line options now have a
direct correspondence rather than a reverse correspondence.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Michael Adam <obnox@samba.org>
The database generation for each database is updated only during recovery.
After recovery is complete the database generation would be the same as
the global generation.
The database generation is required for parallel database recovery.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Since the banning code does not call this function anymore, it can be
made static.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
The same structure is required in new controls for database transactions.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
The pending calls are migration requests received from clients (over unix
domain socket) which are under processing. After a recovery is finished,
any requests which are under processing will be dropped since they do
not belong to the current generation. All the pending call requests
are resent with new generation to restart record migrations.
This is in preparation for parallel database recovery.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Just use ctdb_tcp_connection. It is the same. There are no external
users.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
When the ctdb statistics is reset, reset per database statistics to keep
it consistent with ctdb statistics.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This has not been used for a long time.
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): Fri Jul 10 23:41:18 CEST 2015 on sn-devel-104
This needs to be cleared to avoid stale data when a new recovery
master is elected.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Guenther
Signed-off-by: Günther Deschner <gd@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat May 30 05:03:59 CEST 2015 on sn-devel-104
ctdb_get_capabilities() gets capabilities from all connected nodes
into an array. ctdb_get_node_capabilities() gets capabilities for a
particular node from array. ctdb_node_has_capabilities() returns true
if given node has all of the given capabilities.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is like CTDB_CONTROL_GET_NODEMAP but it loads from the nodes file
instead of the daemon.
Also new client function ctdb_ctrl_getnodesfile()
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Every time a nodemap is contructed the node IP addresses all need to
be parsed. This isn't very productive use of CPU.
Instead, parse each string once when the nodes file is loaded. This
results in much simpler code.
This code also removes the use of ctdb_address. Duplicating the port
is pointless without an abstraction layer around ctdb_address. If
CTDB gets an incompatible transport in the future then add an
abstraction layer.
Note that the infiniband code is not updated. Compilation of the
infiniband code is already broken. Fixing it will be a separate,
properly tested effort.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Having it require a CTDB context stops ctdb_parse_address() from being
used in more generic code. Just use the existing talloc context for
memory allocations.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Have it just silently take or fail to take the lock, except on an
unexpected failure (where it should log an error).
This means that when it is called we need to keep the old behaviour
and explicitly release the lock. In do_recovery() the lock is
released and a message is printed before attempting to take the lock.
In the daemon sanity check the lock must be released in the error path
if it is actually taken.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Unlock the recovery lock file. This way knowledge of the file
descriptor isn't sprinkled throughout the code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
For now replace.h needs to be before tdb.h, since tdb.h needs
stdbool.h. This is fixed upstream but not yet in various packaged
versions.
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): Fri Oct 31 03:46:40 CET 2014 on sn-devel-104
Remove unused #defines. CTDB doesn't use these. _PUBLIC_ is defined
in replace.h anyway.
Remove unnecessary #includes.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Remove --logfile and --syslog daemon options and replace with
--logging.
Modularise and clean up logging initialisation code. The
initialisation API includes an app_name argument that is currently
unused - this will be used in extensions to the syslog backend.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It is much simpler for most cases to have a syslog backend that
doesn't need a separate CTDB-specific logging daemon. This loses the
lossy, non-blocking mode provided by logd. However, a corresponding
feature with a completely different implemention (not requiring an
extra daemon) will be re-added into the syslog backend. In an ideal
world the new implementation would be added first but unfortunately
that is hard to do because the logd code is hooked in at more than one
place.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This makes the code cleaner and allows the syslog backend to be easily
modified without affecting other code. Also do some extra clean-up,
including whitespace fixups.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Put declarations into ctdb_logging.h, factor out some common code,
clean up #includes.
Remove the check so see if the 1st character of the debug level is
'-'. This is wrong, since it is trying to check for a negative
numeric debug level (which is no longer supported) and would need to
be handled in the else anyway.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is set but otherwise not used. This allows the 1st argument to
ctdb_set_logfile() to be generalised to a TALLOC_CTX.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is only used by logging code and there is already a file-level
variable for this. struct ctdb_context already contains too many
things.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Internally map them to DEBUG_ERR to limit code churn.
This reduces the unwieldy number of debug levels used by CTDB. ALERT
and CRIT aren't of much use as separate errors, since everything from
ERR up should always be logged. In future just ERR can be used.
This also improves compatibility with Samba's debug.c system priority
mapping.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It isn't used and shouldn't be. CTDB can't make the system unusable.
Update associated test to ensure that EMERG isn't attempted. Actually
test all remaining debug levels and modernise the test a bit.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Remove local lib/util and lib/tdb-wrap. Update wscript, packaging and
includes.h.
The only potentially surprising thing here is a fake samba-util
subsystem that just depends on samba-util-core. As explained in a
comment:
When a combined build is implemented, CTDB will wanted to build
against samba-util rather than samba-util-core. Similarly, other
Samba subsystems expect samba-util. So, for a standalone build,
just define a fake samba-util subsystem that pulls in
samba-util-core.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
Samba's debug subsystem has changed a lot, so CTDB's logging needs
to be rewritten to be compatible.
The new debug.h/debug.c can't just be pulled in because it has some
extra dependencies into Samba's lib/util. For now, to support the
smallest possible patch, implement a minimal subset of Samba's
debug.[ch] that just supports the DEBUG_CALLBACK logtype.
Define a callback for each logging method.
Check later to see if debug_extra (or similar) can somehow be
implemented using debug classes.
The timestamp on CTDB CLI tool and test program DEBUG() output goes
away, so update the unit test code to cope.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
As far as we know, nobody uses this and it just complicates the
logging subsystem.
Remove all ringbuffer code and documentation. Update the local
daemons startup code correspondingly.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
Warnings are currently produced when compiling Samba and
ctdb_private.h is included. A forward enum declaration avoids the
warning.
This is a temporary measure. The log ringbuffer should be removed
soon.
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 Sep 23 10:31:50 CEST 2014 on sn-devel-104
To accommodate removing file_lines_load() from here, drop the #ifdef
around the declaration in util.h.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
debug_extra is CTDB-specific. Moving it will help with the
transitions to Samba's updated debug.[ch].
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This function is only used in this file. Samba's lib/util doesn't
have timeval_delta(), so staging a clean transition.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is part of a migration to Samba's lib/util. CTDB always passes 0
(i.e. no max_size) so use a simple assert() to enforce this, rather
than changing a lot of code that will be discarded anyway.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is the only place it is used.
After migrating to Samba's lib/util, the lock helper can be changed to
use strhex_to_data_blob().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
To avoid warnings when using --enable-developer, which uses
-Wmissing-prototypes.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
When CTDB receives DMASTER_REQUEST or DMASTER_REPLY packet, the specified
record needs to be updated as soon as possible to avoid inconsistent
dmaster information between nodes. During this time, queue up all calls
for that record and process them only after dmaster request/reply has
been processed.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
There is no need for a special function to free lock request and
corresponding lock context. Freeing lock request will free lock
context also.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This makes sure that when the client context is destroyed, the lock
request goes away. If the lock requests is already scheduled, then the
lock child process will be terminated.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
We really should extricate these from source3 and into some common
code. However, just copy them for now to help get rid of a lot of
warnings.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This avoids traversing a single pending queue which is quite expensive
when there are lots of pending lock requests. This seems to happen
quite a lot on a loaded cluster for notify_index.tdb.
Adding per database queues avoids the need to traverse pending queue
for that database if there are already the maximum number of active
lock requests.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Mon Aug 4 20:23:45 CEST 2014 on sn-devel-104
The number of pending locks displayed in ctdb statistics are stored in
ctdb_statistics structure and not ctdb_context.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
This allows to change the maximum number of lock processes that can
be active.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
To enable TDB mutex support, set tunable TDBMutexEnabled=1.
When databases are attached for the first time, attach flags must include
TDB_MUTEX_LOCKING and TDBMutexEnabled must set to enable mutex support.
However, when CTDB attaches databases internally for recovery, it will
enable mutex support if TDBMutexEnabled is set.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Wed Jul 9 06:45:17 CEST 2014 on sn-devel-104
This prevents ctdb tool from thawing databases prematurely in
thaw/wipedb/restoredb commands if recovery is active.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This duplicates ctdb->ctdbd_pid.
Thanks to Sumit Bose <sbose@redhat.com> for the suggestion.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
When calling sched_setscheduler() with SCHED_OTHER, the only valid
priority is 0. Nice value is "restored" anyway.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This will allow to build clustered samba with built-in ctdb tree rather
than needing to install CTDB first.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
As part of vacuuming, recoverd attaches to databases to migrate records.
When detaching a database from main daemon, it should be removed from
recovery daemon also.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Wed Apr 23 17:05:45 CEST 2014 on sn-devel-104
Database priority is a global property and all the nodes should have the
priority set for the databases. Just setting priority on one node can
lead to problems in the recovery as a database can be frozen at wrong
priority and then freezing database would not succeed.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Mon Apr 7 14:06:26 CEST 2014 on sn-devel-104
reloadips really expects deleted IPs to be released before completing.
Otherwise the recovery daemon starts failing the local IP check. The
races that follow can cause a node to be banned.
To make the error handling simple, do the actual deletion in
release_ip_callback().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Any currently running monitor events are cancelled if any other events
are scheduled. However, this does not stop monitor events to be run
when other events are already running.
Keep track of the number of active events and schedule monitor event
only if there are no active events.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
At the moment ctdb_check_healthy() is overloaded to wait until the
first recovery is complete, handle the "startup" event and also
actually handle monitoring. This is untidy and hard to follow.
Instead, have the daemon explicitly wait for 1st recovery after the
"setup" event. When first recovery is complete, schedule a function
to handle the "startup" event. When the "startup" event succeeds then
explicitly enable monitoring.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This function has been replaced with ctdb_vfork_with_logging().
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Thu Jan 16 04:05:35 CET 2014 on sn-devel-104
This will be used to spawn lightweight helper processes to run
eventscripts.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This was added to support external monitoring using CTDB event scripts.
However, it was never used.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This code can then be used to track child processes created with vfork().
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
This limit was currently a global limit and not per database. This
prevents any database freeze lock requests from getting scheduled if
the global limit was reached.
Only individual record requests should be limited and database freeze
requests should always get scheduled.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Also add test.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
When running a mixed version cluster, compatibility with older
versions was was broken during recent refactorisation.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Use /var/run/ctdb/ctdbd.socket because there might be other daemons
that need sockets in the future.
The local daemons test code to create a link for the default
convenience socket has to be removed because the link can't be created
as a regular user in the new location. This should be OK since all
calls to the ctdb tool in the test code should be wrapped in onnode.
When debugging tests, a developer will have to set CTDB_SOCKET by
hand.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Pair-programmed-with: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit dc67a4e24af9d07aead2a1710eeaf5d6cc409201)
No need to check if the options are set. The options are always set
via static defaults.
No need to talloc_strdup() the values via wrapper functions. The
options aren't going away. Remove now unused ctdb_set_tdb_dir() and
similar functions.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 1fe82f3d7b610547ff4945887f15dd6c5798a49b)
Behaves like mkdir -p.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit afe2145d91725daf1399f0a24f1cddcf65f0ec31)
Reported by John P Janosik <jpjanosi@us.ibm.com>
Signed-off-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit 1f327401f2e181780937aa3f6c479376ff787f3f)
No need to pass it as an extra argument to ctdb_start_daemon.
Also ensure options.public_address_list gets a nice static default.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit a3d63a9db89d08bb284b3b3a6db773422f21b477)
Also get rid of ctdb_set_event_script_dir(). It creates an
unnecessary copy of something that will be around for the lifetime of
the process.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 21b4d1aba00902f1eee0cbf4f082b0794fd5b738)
This allows ctdb_load_nodes_file() to move to ctdb_server.c and
ctdb_set_nlist() to become static.
Setting ctdb->nodes_file needs to be done early, before the nodes file
is loaded. It is now set from CTDB_BASE instead ETCDIR, so setting
CTDB_BASE also needs to be done earlier.
Unhack ctdbd_test.c - it no longer needs to define
ctdb_load_nodes_file().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 20e705e63bd3b20837cc3ac92fdcf2a9650ccfc8)
Implementing persistent trasnaction code from Samba.
Persistent transaction code was reimplemented in Samba using g_lock.tdb
to hold transaction locks and using TRANS3_COMMIT control.
Implementation details:
1. When starting a transaction, create a record with "transaction-<dbid>"
as key and store current server_id in the structure.
2. If a record already exists, some other client has already started a
transaction. Verify that the process corresponding to server_id stored
in the record really exists or it's a stale record and overwrite it.
3. All modifications to the actual persistent database are stored in a
marshal buffer.
4. When transaction is committed, read the sequence number of the
persistent database and increment it. Sequence number record is also
stored in the marshal buffer.
5. Send the changed records (marshal buffer) in TRANS3_COMMIT control
to all the active nodes.
6. If all controls succeed, verify that the sequence number has been
incremented. Commit is successful. If any of the controls fail,
abort the transaction.
7. In case sequence number has not yet been incremented, then database
recovery has been triggered. So repeat from step 5.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 4e0f1971792c9431d8d51dc57d54ecc9e4576dd5)
This removes data types and structure elements related to TRANS2
persistent transaction code.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 22a253b7ccf1ff854cddf0b67969dc84d7d6a654)
The current implementation has a few flaws:
* A takeover run is called unconditionally when the timer goes even if
the recovery master role has moved. This means a node other than
the recovery master can incorrectly do a takeover run.
* The rebalancing target nodes are cleared in the setup for a takeover
run, regardless of whether the takeover run succeeds.
* The timer to force a rebalance isn't cleared if another takeover run
occurs before the deadline. Any forced rebalancing will happen in
the first takeover run and when the timer expires some time later
then an unnecessary takeover run will occur.
* If the recovery master role moves then the rebalancing data will
stay on the original node and affect the next takeover run to occur
if the recovery master role should come back to the original node.
Instead, store an array of rebalance target nodes in the recovery
master context. This is passed as an extra argument to
ctdb_takeover_run() each time it is called and is cleared when a
takeover run succeeds. The timer hangs off the array of rebalance
target nodes, which is cleared if the node isn't the recovery master.
This means that it is possible to lose rebalance data if the recovery
master role moves. However, that's a difficult problem to solve. The
best way of approaching it is probably to try to stop the recovery
master role from jumping around unnecesarily when inactive nodes join
the cluster.
The long term solution is to avoid this nonsense completely. The IP
allocation algorithm needs to cache state between runs so that it
knows which nodes have just become healthy. This also needs recovery
master stability.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit c51c1efe5fc7fa668597f2acd435dee16e410fc9)
This implements a superset of CTDB_SRVID_DISABLE_IP_CHECK. It stops
the IP checks but also causes any attempted takeover runs to fail and
be rescheduled.
This is meant to completely stop IP movements.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 00db4de53a0d86013e79e6577e7e6cf3ef864e56)
No need for a separate one for each SRVID.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit d9c22b04d5aa7938a3965bd3144568664eb772ce)
This is an internal structure. It was moved into ctdb_private.h a
long time ago to allow unit testing. Unit test compilation was
changed shortly afterwards to make this unnecessary.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit db57261d7dc264e161659a8c547f44fbd9e88eeb)
This reverts commit 035c0d981bde8c0eee8b3f24ba8e2dc817e5b504.
This is a premature optimization. Record can bounce between nodes
very quickly if it is a contended record. There is no need to hold a
record on a node unnecessarily. In case record contention becomes bad,
enabling sticky records on a database is a better idea.
Conflicts:
include/ctdb_private.h
server/ctdb_tunables.c
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit ac417b0003f0116f116834ad2ac51482d25cfa0d)
This reverts commit 10a057d8e15c8c18e540598a940d3548c731b0b4.
This approach would not work when creating local databases since currently
there is no control to receive TDB flags for remote databases.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit ca61eb776ab862bd269e45ee0f9f96e7e1e0e001)
When creating missing databases either locally or remotely, make sure
to use the correct tdb flags from other nodes. Without this, volatile
databases can get attached without TDB_INCOMPATIBLE_HASH flag.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 10a057d8e15c8c18e540598a940d3548c731b0b4)
Instead of maintaining another structure, add an element as place holder for
marshall buffer of hot keys. This avoids duplication of the structure.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit e73b2e12adc9db1dedb48d32bba3a8406a80f4cd)
The structure cannot be removed without adding support for marshalling keys
for hot records.
This reverts commit 26a4653df594d351ca0dc1bd5f5b2f5b0eb0a9a5.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 023ca2e84f5ed064a288526b9c2bc7e06674dd81)
The code for deadlock detection and killing smbd process causing deadlock
has been removed and replaced with external debug script.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 2211cd94bea266547d3e6f167d3160a6b23bec88)
Send the ctdb_db_statistics directly instead of first copying it to
duplicate ctdb_db_statistics_wire structure. This simplifies the
implementation of the control to get database statistics.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 26a4653df594d351ca0dc1bd5f5b2f5b0eb0a9a5)
The log messages in verify_remote_ip_allocation() are confusing
because they don't include the PNN of the problem node, because it is
not known in this function.
Add the PNN of the node being verified as a function argument and then
shuffle the log messages around to make them clearer.
Also fold 3 nested if statements into just one.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit f0942fa01cd422133fc9398f56b4855397d7bc86)
This is like ctdb_fatal() but exits cleanly without dumping core or
generating a backtrace.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit c0a9456692c88a7a5542cd893d8f326524d3f94e)
When this function is called, we are already committed to banning
and there is no point in failing this function. In case, freezing of
databases fails, it will be fixed from recovery daemon.
(This used to be ctdb commit bb178338658b4ae32382a1f62f7c21cee1d4878f)
If this function fails due to memory errors, there is no way to recover.
The best course of action is to abort.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 46efe7a886f8c4c56f19536adc98a73c22db906a)
This adds more serialisation to the startup, ensuring that the
"startup" event runs after everything to do with the first recovery
(including the "recovered" event).
Given that it now takes longer to get to the "startup" state, the
initscript needs to wait until ctdbd gets to "first_recovery".
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit ed6814ff0a59ddbb1c1b3128b505380f60d7aeb7)
Also new client function ctdb_ctrl_get_runstate().
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit dc4220e6f618cc688b3ca8e52bcb3eec6cb55bb1)
This allows states, including startup and shutdown states, to be
clearly tracked. This doesn't include regular runtime "states", which
are handled by node flags.
Introduce new functions ctdb_set_runstate(), runstate_to_string() and
runstate_from_string().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 8076773a9924dcf8aff16f7d96b2b9ac383ecc28)
These functions were used in locking child process to do the locking. With
locking helper, these are not required.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit c660f33c3eaa1b4a2c4e951c1982979e57374ed4)
These should never be seen outside the IP allocation code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit e143abd16ccde2e0edfe103673d31a5fb06b6aef)
This really needs to be per-node. The rename is because nodes with
this tunable switched on should drop IPs if they become unhealthy (or
disabled in some other way).
* Add new flag NODE_FLAGS_NOIPHOST, only used in recovery daemon.
* Enhance set_ipflags_internal() and set_ipflags() to setup
NODE_FLAGS_NOIPHOST depending on setting of NoIPHostOnAllDisabled
and/or whether nodes are disabled/inactive.
* Replace can_node_servce_ip() with functions can_node_host_ip() and
can_node_takeover_ip(). These functions are the only ones that need
to look at NODE_FLAGS_NOIPTAKEOVER and NODE_FLAGS_NOIPHOST. They
can make the decision without looking at any other flags due to
previous setup.
* Remove explicit flag checking in IP allocation functions (including
unassign_unsuitable_ips()) and just call can_node_host_ip() and
can_node_takeover_ip() as appropriate.
* Update test code to handle CTDB_SET_NoIPHostOnAllDisabled.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 1308a51f73f2e29ba4dbebb6111d9309a89732cc)
It isn't used, superceded by "ipreallocated".
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit c2bb8596a8af6406ef50e53953884df9d6246a96)
This is an alternative to using ctdb_run_eventscripts() that can be
used when in recovery.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 27a44685f0d7a88804b61a1542bb42adc8f88cb1)
This is used for some checks
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit c7924ce6404bb18641b00d5fbd2fe9da9aaf7959)
This in preparation of turning the vacuming on the lmaster into
into a two phase process:
- First the node sends the list of records to be vacuumed
to all other nodes with this new RECEIVE_RECORDS control.
The remote nodes should store the lmaster's empty current copy.
- Only those records that could be stored on all other nodes
are processed further. They are send to all other nodes with
the TRY_DELETE_RECORDS control as before for deletion.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit e397702e271af38204fd99733bbeba7c1db3a999)
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit 1e989894764e4cd1d551c44784d91cb295cd790d)
It really is internal.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit abb64f62efaa70df4b87c030b96300eafd98e6a3)
Default is not to create a pid file.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit 996e74d3db0c50f91b320af8ab7c43ea6b1136af)
Must be called by all child processes.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit 59b019a97aad9a731f9080ea5be14d0dbdfe03d6)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 2e92deef5221ee651028ef87138b3113f1fece91)
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit e691df43d20871468142c8fb83f7c7303c4ec307)
When CTDB is busy with lots of smbd, CTDB was spending too much time in
daemon_check_srvids() which searches a list of srvids in the registered
message handlers. Using a hash based index significantly improves the
performance of search in a linked list.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 3e09f25d419635f6dd679b48fa65370f7860be7d)
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit a73bb56991b8c07ed0e9517ffcf0dc264be30487)
Commit a82d3ec12f0fda16d6bfa8442a07595de897c10e broke fetching from
the log ringbuffer. The solution there is still generally good: there
is no need to keep the ringbuffer in children created by
ctdb_fork()... except for those special children that are created to
fetch data from the ringbuffer!
Introduce a new function ctdb_fork_no_free_ringbuffer() that does
everything ctdb_fork() needs to do except free the ringbuffer (i.e. it
is the old ctdb_fork() function). The new ctdb_fork() function just
calls that function and then frees the ringbuffer in the child.
This means all callers of ctdb_fork() have the convenience of having
the ringbuffer freed. There are 3 special cases:
* Forking the recovery daemon. We want to be able to fetch from the
ringbuffer there.
* The ringbuffer fetching code. Change the 2 calls in this code (main
daemon, recovery daemon) to call ctdb_fork_no_free_ringbuffer()
instead.
While we're here, clear the log ringbuffer when the recovery deamon is
forked, since it will contain a copy of the messages from the main
daemon.
Note to self: always test... even the most obvious patches... ;-)
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 00db5fa00474f8a83f1aa3b603fd756cc9b49ff4)
Use an environment variable instead. This just means that the
initscript exports CTDB_DEBUG_HUNG_SCRIPT and the code checks for the
environment variable.
The justification for this simplification is that more debug options
will be arriving soon and we want to handle them consistently without
needing to add a command-line option for each. So, the convention
will be to use an environment variable for each debug option.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 0581f9a84e58764d194f4e04064c2c5b393c348b)
The only allocation against this context is by
ctdb_fork_with_logging(). This memory is freed by ctdb_log_handler()
anyway. There should be no memory leak.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 501461cc3e132d4adee9e91b5d4513a26bae2846)
When CTDB is shut down and monitoring has been stopped, monitor_context
gets freed and all the callback states hanging off it. This includes
callback state for current_monitor, if the current monitor event has
not yet finished. As a result, when the shutdown event is called,
current_monitor->callback state is not NULL, but it's actually freed
and it's a dangling reference.
So before executing callback function and freeing callback state check
if ctdb->monitor->monitor_context is not NULL.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 7d8546ee4353851f0543d0ca2c4c67cb0cc75aea)
When CTDB is shutting down, recovery daemon is stopped, but the
event that checks if recovery daemon is still alive is not destroyed.
So recovery master is restarted during shutdown if CTDB daemon takes
longer to shutdown.
There are two processes that check if recovery daemon is working.
1. ctdb_check_recd() - which checks every 30 seconds if the recovery
daemon process exists.
2. ctdb_recd_ping_timeout() - which is triggered when recovery daemon
fails to ping CTDB daemon.
Both the events are periodic and need to be destroyed when shutting down.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 746168df2e691058e601016110fae818c6a265c3)
This effectively reverts d96cb02c2c24f9eabbc53d3d38e90dea49cff3e0
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 496387a585b2c5778c808cf02b8e1435abde4c3e)
Samba versions 3.6.x and older do not set the database priority.
This can cause deadlock between Samba and CTDB since the locking order
of database will be different. A hack was added for automatic promotion
of priority for specific databases to avoid deadlock. This code should
not be invoked with Samba version 4.x which correctly specifies the
priority for each database.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit 4a9e96ad3d8fc46da1cd44cd82309c1b54301eb7)
This fixes a bug where wrong variable is checked.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit f81e9add466b1d9b2796c09c6ba63b77296ea149)
RECLOCK is for recovery lock in CTDB. Do not override the meaning for
tracking locks on databases. Database lock latency has nothing to do
with recovery lock latency.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 54e24a151d2163954e5a2a1c0f41a2b5c19ae44b)
If any of the nodes fail takeover run (either due to timeout or failure
to complete within takeover_timeout interval) from main loop, recovery
master will give up trying takeover run with following message:
"Unable to setup public takeover addresses. Try again later"
And as a side-effect the monitoring is disabled on all the nodes. Before
ctdb_takeover_run() is called from main loop, monitoring get disabled via
startrecovery event. Since ctdb_takeover_run() fails, it never runs
recovered event and monitoring does not get re-enabled.
In main_loop, ctdb_takeover_run() is called with a takeover_fail_callback.
This callback will get called if any of the nodes fail in handling
takeip/releaseip/ipreallocated events in ctdb_takeover_run().
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit a5c6bb1fffb8dc3960af113957a1fd080cc7c245)
These support getting and clearing logs from the ring-buffer in the
recovery daemon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit cbca233d1e03b2410e0bb63b936328d4a8b3c7b4)
