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This helps distinguish processes in process list in top, perf, etc.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 2493f57ce268d6fe7e4c40a87852c347fd60d29e)
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)
The runstate can't be set to SHUTDOWN twice, so the current naive code
causes a panic on the 2nd shutdown. This regression was introduced in
commit 8076773a9924dcf8aff16f7d96b2b9ac383ecc28.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit f1b7ca8dc3f34a59c7b3e55748f974ac9ed8f458)
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)
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)
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 a monitor event is canceled by a higher priority script, make sure we return
status -ECANCELED to the callback in ctdB_monitor.c
Also treat -ECANCELED as a simple "try monitor event again" and skip modifying any HEALTHY/UNHEALTHY flags when this happens
(This used to be ctdb commit a15ec57c26d1bc82af85f74eebae0bd8abde3233)
Reduce an infomational message about not performing ip reallocation
from NOTICE(the default) to INFO.
These messages are normal during startup or when stopped/banned when
we will be in recovery mode for a while.
Remove a messager in the loop waiting for initial startup to complete about
the generation being invalid. It is always invalid at this stage before we have
finished initial recovery.
Rate-limit the informational messages for CTDB_WAIT_UNTIL_RECOVERED
so that we only print them once per second for the first 60 seconds and after that only once per 10 minutes.
These messages are normal during startup, but we should not be logging them every second for cases where we will remain in recovery mode during startup for an extended period of time.
Such as if suspended or permabanned.
CQ S1023302
(This used to be ctdb commit 3a0af8780dc595acbed880f288fcbc4f62c862fb)
the initial recovery phase
CQ S1022412
Signed-off-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit e02bbd915b7151c615ff64f09ad9abc9720bef7d)
scheduler for the child.
Use ctdb_fork() from callers where we dont want the child to be running
at real-time privilege.
(This used to be ctdb commit 58795a4c9e0624e20fa3e0023b65127053edd103)
This can cause ctdbd to spin at 100% in the eventsystem,
creating a timed event that will immediately trigger again
and again.
On uniprocessors this cause the eventscript we are actually waiting for to
basically become cpu starved and never complete.
(This used to be ctdb commit 92c8408fba957a8ded13f7e285da290502735234)
This means we can distinguish which child is logging, esp. via syslog where we have no pid.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 68b3761a0874429b90731741f0531f76dcfbb081)
In Samba this is now called "tevent", and while we use the backwards
compatibility wrappers they don't offer EVENT_FD_AUTOCLOSE: that is now
a separate tevent_fd_set_auto_close() function.
This is based on Samba version 7f29f817fa.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 85e5e760cc91eb3157d3a88996ce474491646726)
The extra recovery interval wait was introduced in 821333afb458 but no
explanation was provided in that message. Nonetheless, if starting
the entire cluster for the first time, it should be safe to skip this.
We use the commandline arg --sloppy-start which should discourage
people from using it outside testing.
Seconds between ctdbd first log message and node healthy:
BEFORE: 16.10
AFTER: 4.03
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 509e2e89ae233a0e91998d95267bf62f296a73cd)
Seconds between ctdbd first log message and node healthy:
BEFORE: 17.08
AFTER: 16.10
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 372201d418f041d69646793105f6898ab12a7d91)
Once we've done a startup, we need to run a monitor event successfully
to be marked as healthy. Rather than wait the usual 5 seconds, run it
immediately (which will then reset next_interval to 5 seconds).
Seconds between ctdbd first log message and node healthy:
BEFORE: 23.58
AFTER: 18.09
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit c8651494febcb1c9e558b2002e2a72c2bf547c06)
This is needed because the "startup" event runs after the initial recovery,
but we need to do some actions before the initial recovery.
metze
(This used to be ctdb commit e953808449c102258abb6cba6f4abf486dda3b82)
Depending on --max-persistent-check-errors we allow ctdb
to start with unhealthy persistent databases.
The default is 0 which means to reject a startup with
unhealthy dbs.
The health of the persistent databases is checked after each
recovery. Node monitoring and the "startup" is deferred
until all persistent databases are healthy.
Databases can become healthy automaticly by a completely
HEALTHY node joining the cluster. Or by an administrator
with "ctdb backupdb/restoredb" or "ctdb wipedb".
metze
(This used to be ctdb commit 15f133d5150ed1badb4fef7d644f10cd08a25cb5)
since we no longer ban nodes when dodgy scripts continue to hang.
We now only mark nodes as unhealthy if monitor events fail or timeout. Never ban.
(This used to be ctdb commit 5c8e56fc7a518e115bceac257867739283cf6a1e)
there is no rational need for a setting where we permanently mark nodes as disabled everytime an eventscript fails
(This used to be ctdb commit 68a8ee99b128a5ec883600735626bdb3bbc9c503)
If we've timed out, but we've not timed out more than
ctdb->tunable.script_ban_count, we pretend we haven't.
There's a logic bug in the way this is done: if we were unhealthy before,
this would set us to "healthy" again (status == 0). I don't think this
would happen in real life, but it's a little surprising.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit e6488c0e05bab5c4c2c0a6370930b0b27e5ed56e)
Currently the timeout handler in eventscript.c does the banning if a
timeout happens. However, because monitor events are different, it has
to special case them.
As we call the callback anyway in this case, we should make that handle
-ETIME as it sees fit: for everyone but the monitor event, we simply ban
ourselves. The more complicated monitor event banning logic is now in
ctdb_monitor.c where it belongs.
Note: I wrapped the other bans in "if (status == -ETIME)", though they
should probably ban themselves on any error. This change should be a
noop.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 9ecee127e19a9e7cae114a66f3514ee7a75276c5)
and until we have gone through a full re-recovery timeout without triggering
any pending recoveries before we start up the services and start monitoring
the node.
(This used to be ctdb commit 821333afb458358f90446062b0242790695e5060)
Rather than doing strcmp everywhere, pass an explicit enum around. This
also subtly documents what options are available. The "options" arg
is now used for extra arguments only.
Unfortunately, gcc complains on empty format strings, so we make
ctdb_event_script() take no varargs, and add ctdb_event_script_args(). We
leave ctdb_event_script_callback() taking varargs, which means callers
have to do "%s", "".
For the moment, we have CTDB_EVENT_UNKNOWN for handling forced scripts
from the ctdb tool.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 8001488be4f2beb25e943fe01b2afc2e8779930d)
Everyone uses the same timeout value, so just remove it from the API.
If we ever need variable timeouts, that might as well be central too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 533c3e053293941d2a9484b495e78d45f478bb08)
The problem was this:
When the monitor event fails, the node->flags get updated,
and an update (containing the old and new flags) is sent to
the recovery master.
If the recovery master sends the update to itself (the same process),
it was compairing the node->flags variable with the received new flags.
This check always found both flag values to be equal
and never sets the rec->need_takeover_run variable to true.
There were two problem, first the push_flags_handler() function
didn't pass the received old flags.
And the ctdb_control_modflags() function ignored the received old flags.
metze
(This used to be ctdb commit 8ec633b64a05a2d903c2b9639909f15f6375548f)
The waiters reference the locakwait handle in order to remove itself from the li
nked list which caused a SEGV.
We dont actually need to remove ourselves from this list here since
if the parent freeze_handle holding the list is freed, then all waiters are rele
ased as well, and the only place we actually need to relink the waiter is in ctd
b_freeze_lock_handler, where we want to respond back to the clients and release
the waiters but we still want to keep the freeze_handle hanging around.
(This used to be ctdb commit e01ab46bafad09a5e320d420734db129d35863bc)
The databases can become frozen a while before we do the actual recovery
since we have the re-recovery timeout.
There is no point in doing much monitoring if we are waiting for a recovery,
or if we are banned.
This will eliminate some annoying log entries where certain tests will fail if the databases are locked.
(This used to be ctdb commit ff824676fab94168707aada7423ae766bc0f711c)
master to perform an explicit ip reallocation.
This is more reliable and faster than having the recovery dameon track these
changes, and since we now have an explicit method to ask the recovery daemon
to perform an explicit ip reallocation, we should use this.
(This used to be ctdb commit 3807681e74f4bfe92befdae6ed616ff5f1a99880)
This would allow a sysadmin to set up ctdb to send an email/snmptrap/... when the status of the node changes.
(This used to be ctdb commit ce534a83a05dbd40238e4eee0669d60ff396f935)
race between the ctdb tool and the recovery daemon both at once
trying to push flag changes across the cluster.
(This used to be ctdb commit a9a1156ea4e10483a4bf4265b8e9203f0af033aa)
just disable the monitoring during the "startrecovery" event and enable it again once recovery has completed
(This used to be ctdb commit 68029894f80804c9f31fc90ed0c1b58f75812c3d)
