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Move information about TCP connection tracking and resetting into
ctdb.7.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
exportfs can hang when, for example, DNS is flakey. Given that
exports don't change much, it makes sense to cache them.
Don't try to add error handling when exportfs fails but do print a
warning. Proper error handling can be added separately.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These should be created elsewhere. If not then something is wrong, so
don't hide the problem.
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 Nov 20 04:40:26 CET 2015 on sn-devel-104
Various scripts (including debug_locks.sh, 00.ctdb, 05.system) need
CTDB_DBDIR to point to the right place... but it doesn't.
Move the rewriting of CTDB_DBDIR to loadconfig() so that it happens
for all scripts. Have this code set internal variable
CTDB_DBDIR_TMPFS_OPTIONS so that ctdbd_wrapper can do the mount.
This loses the generality that was present in dbdir_tmpfs_start() but
it wasn't being used anyway. If it is needed in the future then it
will be in the git history.
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): Wed Nov 18 11:51:54 CET 2015 on sn-devel-104
The tmpfs is mounted and unmounted by ctdbd_wrapper. Format is
CTDB_DBDIR=tmpfs:<tmpfs-options>. The only default for the tmpfs is
mode=700 - to override, specify a different value in <tmpfs-options>.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Mon Nov 9 10:58:32 CET 2015 on sn-devel-104
This will make it easier to run things after CTDB is stopped.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri Nov 6 13:43:45 CET 2015 on sn-devel-104
Since commit 84f5528d9b526b1e9cb02c245e816c0c5e54c3bc, CTDB will not
remove an existing socket if it can connect to the existing one.
Instead it will fail to start.
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): Wed Oct 28 09:44:37 CET 2015 on sn-devel-104
If 2 attempts are made to start CTDB in quick succession then it is
possible for the 2nd attempt to remove a newly created PID file from
the 1st.
If the PID file existed then the PID/SID from ctdbd_is_running() will
be passed to kill_ctdbd(). If the PID file did not exist then there
is no point removing it.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
In this case: ctdbd_wrapper, onnode, ctdb_diagnostics, ctdb.sudoers.
Set sensible defaults from configure options.
Update documentation to match, trying to fix up anything that has been
missed before.
The onnode unit tests need a symlink to the functions file.
The simple integration tests need to set CTDB_BASE and also
need symlinks to functions/nodes.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
fixup
Signed-off-by: Martin Schwenke <martin@meltin.net>
This variable points to /etc/ by default.
This distinguishes it from the different variable from wscript, which
points to /etc/ctdb/.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Also fix an unused test to set CTDB_BASE.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Clearly identifies where all state files from scripts should go and
allows that location to be easily changed. This patch should not
change any behaviour (outside of eventscript unit tests, where a
clearer location is now used).
CTDB_VARDIR should no longer be overridden. Continue to set
CTDB_DBDIR and similar to override database location in unit tests.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Have wscript do path substitution.
No need to export this and CTDB_ETCDIR here, but test scripts will
still need to do so.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Using $CTDB_VARDIR at file scope is dangerous because it doesn't
respect the configuration. Uses of these variables are simple so just
drop the variables and use $CTDB_VARDIR inside functions where it is
safe.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This directory has been under $CTDB_VARDIR for a long time, so is
already removed. The command is also potentially dangerous if
$ctdb_managed_dir is not set.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
They're not used outside of ctdb_standard_event_helper().
As a consequence, make ctdb_standard_event_helper() do nothing. It is
harder to remove because it is used in many places, perhaps by
external eventscripts where it has been copied from existing scripts.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
To get a similar effect just do something like this:
mmaddcallback ctdb-disable-on-quorumLoss \
--command /usr/bin/ctdb \
--event quorumLoss --parms "disable"
mmaddcallback ctdb-enable-on-quorumReached \
--command /usr/bin/ctdb \
--event quorumReached --parms "enable"
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
60.nfs sets this to a directory where the NFS callout can store state.
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): Mon Sep 14 08:36:34 CEST 2015 on sn-devel-104
Always check filesystem usage for the database directories.
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): Sat Aug 29 20:08:48 CEST 2015 on sn-devel-104
CTDB should warn by default if too much system memory or swap is used.
The tests have also been tweaked. In particular, the filesystem-only
tests need to initialise the memory information to avoid errors where
meminfo isn't set.
Document the defaults, warning against disabling them.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
They are only printed when the percentage usage changes. This should
stop the logs from being filled with warnings.
Add a test for the throttling.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Marking the node unhealthy should cause Samba processes to close,
possible freeing a stack of memory. If not, then it is somebody
else's problem.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
New variables CTDB_MONITOR_MEMORY_USAGE and CTDB_MONITOR_SWAP_USAGE.
Both take a pair of <warn_threshold>:<unhealthy_threshold> where each
theshold is specified as a percentage.
This adds a callout to check_thresholds() that is run when the
unhealthy threshold is reached.
Add some combination tests.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
CTDB_MONITOR_FREE_MEMORY and CTDB_MONITOR_FREE_MEMORY_WARN are now
percentages that specify thresholds of acceptable memory usage.
Memory/swap usage in tests also specified as percentages.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
No need to use 2 different sources of information for similar checks.
Also, output of free has been changed, whereas /proc/meminfo is a
kernel API, which will not change.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This allows both errors (i.e. unhealthy) and warnings for different
thresholds. It replaces CTDB_CHECK_FS_USE.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Drop obvious comments. Use die() for less lines of code. Use a case
statement to avoid forking unnecessary processes for each filesystem
being checked. Drop parentheses around percentages in messages.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Will put all the system monitoring in here, simplifying 00.ctdb.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
We don't expect to maintain an up-to-date copy. NFS Ganesha team
might provide patches.
Also move the Ganesha .check file
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This adds new configuration variable CTDB_RPCINFO_LOCALHOST6.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is an optimisation to avoid forking the callout for operations
that are not implemented.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Unhealthy after 1 failed attempt to contact the portmapper.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Now that there is only a single NFS eventscript, other eventscripts no
longer need to load all of this.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is now handled by passing the desired number of threads to the
command specified in the dump_stuck_threads variable in .check files.
Remove unused function nfs_dump_some_threads().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This isn't a straightforward move of code from 60.ganesha to the
callout. Simplifications have been made to allow better
interoperation with the new NFS checking logic.
The following configuration variables have been removed:
CTDB_GANESHA_REC_SUBDIR
Edit NFS ganesha callout to change this location
CTDB_NFS_SERVER_MODE, NFS_SERVER_MODE
Use CTDB_NFS_CALLOUT instead
CTDB_NFS_SKIP_KNFSD_ALIVE_CHECK, CTDB_SKIP_GANESHA_NFSD_CHECK
Disable the corresponding .check file instead
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
$service_check_cmd specifies a command to run instead of the regular
rpcinfo-based check.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
