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net.ipv4.tcp_tw_recycle has been removed from Linux 4.12 but, still,
makes sense to check its existence. Unfortunately, current check does
not test for the procfs file existence. This commit fixes the issue.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13984
Signed-off-by: Rafael David Tinoco <rafaeldtinoco@ubuntu.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Jun 4 23:31:24 UTC 2019 on sn-devel-184
CTDB's system memory monitoring in 05.system.script monitors both main
memory and swap. The swap monitoring was originally based on
the (possibly incorrect, see below) idea that swap space stacks on top
of main memory, so that when a system starts filling swap space then
this is supposed to be a good sign that the system is running out of
memory. Additionally, performance on a Linux system tends to be
destroyed by the I/O associated with a lot of swapping to spinning
disks.
However, some platforms default to creating only 4GB of swap space
even when there is 128GB of main memory. With such a small swap to
main memory ratio, memory pressure can force swap to be nearly full
even when a significant amount of main memory is still available and
the system is performing well. This suggests that checking swap
utilisation might be less than useful in many circumstances.
So, remove the separate swap space checking and change the memory
check to cover the total of main memory and swap space.
Test function set_mem_usage() still takes an argument for each of main
memory and swap space utilisation. For simplicity, the same number is
now passed twice to make the intended results comprehensible. This
could be changed later.
A couple of tests are cleaned up to no longer use hard-coded
/proc/meminfo and ps output.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
I thought this was being triggered during automated testing.
However, it appears that a poor choice of fixed ports for NFS RPC
services was the real problem. Revert, since the original behaviour
may be useful.
This reverts commit f1a1c300e1.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
While 0 may indicate that all threads have exited after being stuck,
it may also indicate that nfsd should not be running due to being shut
down.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13860
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@samba.org>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Sun Mar 31 11:47:44 UTC 2019 on sn-devel-144
The alternative seems to be to try something via CTDB_NFS_CALLOUT.
That would be complicated and seems like overkill for something this
simple.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13860
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@samba.org>
The situation for NFS config has got more complicated and is probably
broken in statd-callout on Debian-like systems at the moment. Allow
several alternative configuration names to be tried. Stop after the
first that is found and loaded.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13860
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@samba.org>
At least Red Hat and Debian appear to use (a variant of?) the upstream
systemd units for NFS, so adding support for these services is
relatively easy. Distributions using Sys-V init can patch the
call-out to use the relevant Sys-V init services.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13860
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@samba.org>
When an NFS check restarts a failed service by hand then systemd will
be unable to stop or start this service again because (at least) the
PID file will be wrong. Do this via the NFS Linux kernel call-out
instead. Allow the call-out to use the services instead of doing
manual restarts. Add variables for mount, status and rquotad services
to support this.
Adding systemd NFS services to the call-out will follow.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13860
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@samba.org>
There will be more of these variable for other services so, for
readability, it makes sense for them to start with "nfs_".
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13860
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@samba.org>
ctdbd will start without a recovery lock configured. It will log a
message saying that this is not optimal. However, a careless user may
overlook both this message and the importance of setting a recovery
lock. If the existing example configuration is uncommented then the
directory containing it will be created (by 01.reclock.script) and the
failure (i.e. multiple nodes able to take the lock) will be confusing.
Instead, change the example setting to one that will result in banned
nodes, encouraging users to consciously configure (or deconfigure) the
recovery lock. Tweak the corresponding comment.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13790
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
gstack isn't widely available, so provide a simple function that does
the same thing if it gstack can't be found.
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 Jul 11 14:47:21 CEST 2018 on sn-devel-144
Preparation for recommending configuration for each script next to the
actual script.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is the initial location that will be used by the new
multi-component aware event daemon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Drop function loadconfig(), replacing uses with "load_system_config
ctdb". Drop translation of old-style configuration to new
configuration file. Drop export of debugging variables. Drop
documentation and configuration examples.
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): Thu May 17 07:03:04 CEST 2018 on sn-devel-144
Put it in a function so it is easy to move to common code just in case
it is needed somewhere else.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This pulls database options from the configuration file, caches then
and makes the values available in scripts.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This allows the relevant command-line options to be removed from the
daemon while still leaving the old ctdbd.conf options file in place.
It is a temporary measure to enable testing in an old testing
environment.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This must harken back to the days of yore when corrupt persistent
databases were an issue. We haven't seen this used. If CTDB fails to
start due to a corrupt persistent database then this database can be
removed by hand.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These should be done using features provided by the operating system.
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 May 12 09:13:28 CEST 2018 on sn-devel-144
Some of these just aim to load the generic script.options file while
others target more specific files.
For NFS configuration, always use 60.nfs.options - even for 06.nfs.
This could be carefully documented but will change a lot before
release so there is no need.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This allows other scripts to use the given options for a particular
event script. One interesting example is that the ctdb_natgw tool
should look for configuration in events.d/11.natgw.options.
In the future this will be something like
events/failover/11.natgw.options, so require the component to be
specified even though it isn't yet used.
Test support is also updated.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Just document that NAT gateway and LVS are not compatible with this
option. Update the documentation to make it clear that this is a
10.interface option.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The only configuration options used by statd-callout are NFS_HOSTNAME,
which comes from the NFS system configuration file, and
CTDB_NFS_CALLOUT, which is exported by the 60.nfs event script.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is no longer necessary after the removal of support for
CTDB_DBDIR=tmpfs.
File-local variable ctdb_rundir is no longer used, so drop it.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue May 1 16:20:37 CEST 2018 on sn-devel-144
CTDB has no business mounting filesystems. Instead, documentation
for the new configuration system will include a recommendation that a
tmpfs be mounted on the volatile database directory.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Volatile databases now have their own subdirectory. This makes things
easier if we later recommend mounting a tmpfs on the volatile database
directory, rather than supporting the current CTDB_DBDIR=tmpfs magic.
No need to create database directories for local daemon tests. ctdbd
will do that.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If CTDB_DBDIR_PERSISTENT is not set then set the default relative to
CTDB_VARDIR. The persistent database directory is not (necessarily)
relative to the volatile one.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
After configuration changes ctdbd_wrapper will no longer see the
CTDB_RECOVERY_LOCK option. The daemon already logs a warning if the
recovery lock is not set, so simply drop this extra warning.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is too inflexible for general use. There is no use finding a new
home for this in the new configuration scheme.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Notification scripts are installed into $CTDB_BASE/notify.d/ and are
always run by notify.sh. Leave notify.sh where it is for now but no
longer consider it a configuration file. This is an interim measure
and will be changed again soon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is not used.
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 Apr 27 09:37:49 CEST 2018 on sn-devel-144
This was previously used by the loadconfig() function.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This warning (apparently new in shellcheck 0.4.7) only applies to
double-quoted strings. Change affected constant strings to use
single-quotes. In the one example that contains a variable expansion
escape the backslash as recommended.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13359
There is no serverid database anymore.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Sat Mar 31 08:34:00 CEST 2018 on sn-devel-144
Using CTDB_SET_TunableVariables in the main configuration file is no
longer supported.
The only subtlety is an unexpected order change in one of the unit
test results. This is because the old implementation implicitly
sorted the tunable variables via the set command.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
For now this loads the global CTDB configuration too. This will
change in the future after things are properly modularised.
This also anticipates a future change where event scripts end with a
".script" suffix.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
loadconfig() currently tries to load the CTDB configuration and also
any system configuration relevant to the current (event) script.
Instead add a new function load_system_config() to load the
distribution-specific system configuration for a component. Call this
directly in the rare scripts that need the system configuration.
Also call load_system_config when loading the CTDB configuration to
pull in anything from the CTDB system configuration. This is partly
for backward compatibility but also to get options that can be used
anywhere.
loadconfig() no longer takes an argument. It simply loads the CTDB
configuration.
Drop support for falling back to /etc/ctdb/sysconfig/ctdb (or
similar). Surely there's nobody who uses that!
Also, drop the indirection where loadconfig() calls _loadconfig().
This was used years ago as a test hook and is no longer required.
Inexplicably, this change introduces a new shellcheck test failure, so
silence this.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This seems never to have caught on so reduce complexity.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Tests now deviate from the compile-time default by setting CTDB_BASE.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The interface must always be specified in the public addresses file.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This option adds a lot of unnecessary complexity to scripts.
Configuration should go in $CTDB_BASE, either directly or via a
symlink, so simplify by using the default location.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This was added for a vendor who decided not to use it. It is almost
certainly unused by anyone. If anyone really needs it then it is in
the git history.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Event scripts live in a standard place.
For testing, CTDB_BASE is modified.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Use the default compile-time PID file.
Use a CTDB_PIDFILE environment variable when testing.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This tries to be backward compatible with very old versions of CTDB,
so don't bother.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is already created by installation and/or packaging.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
All of this logic was necessary when ctdbd did poor PID file and
socket handling. Those things are now solid, so remove this
unnecessary logic.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The code has been broken since commit
4b652c1527.
If ctdbd isn't all the way up in time just make a basic attempt to
shut it down.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Scripts that use these counters must call ctdb_setup_state_dir().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Scripts that use these functions must call ctdb_setup_state_dir().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Replace all uses of ctdb_setup_service_state_dir() by
ctdb_setup_state_dir().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This allows state directories for scripts other than services.
ctdb_setup_state_dir() takes 2 mandatory arguments.
Unlike ctdb_setup_service_state_dir(), this does not print the
directory name but sets a global variable. The intention is to go
back to a more sensible style of usage.
This will require a shellcheck directive before the first use, such
as:
# Set by ctdb_setup_state_dir
# shellcheck disable=SC2154
foo="${script_state_dir}/bar"
An alternative would be something like the following, which tricks
shellcheck into believing the variable is set:
ctdb_setup_state_dir "service" "foo"
# Shellcheck
script_state_dir="$script_state_dir"
However, this is more cryptic.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Don't use the same directory as temporary databases.
Make associated test consistent.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This means there will be 2 loops reading the data but the code flow is
much more obvious.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This causes unnecessary g_lock activity and overhead.
This could be optimised in ctdb.c:control_ptrans(). However, that
makes the code more complex. Let's only do that if we get more
potentially no-op uses.
Note no optimisation is needed in the "notify" case because there is
already an early exit if there are no items.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This was an attempt to debug an unexpected situation. It never
triggered, so delete it and all supporting code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This makes it consistent with the rest of the script code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is an unconditional reconfiguration so skip the unnecessary
logic.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is an optimisation that can cause incorrect results. If ctdbd
was killed and there is a stale PID file then this will often cause
"CTDB exited during initialisation". The wrapper reads the old PID
from the PID file, finds the PID gone, complains and exits.
It is better to drop this code and finally get this right. If ctdbd
does exit early then it will take CTDB_STARTUP_TIMEOUT (default 10)
seconds before the wrapper fails. That's not too bad...
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13070
This avoids running event script copies left by a package manager.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Given the size of the command substitutions it would be less clear to
embed the assignments and substitutions inside a conditional. It is
clearer if the exit code is checked afterwards.
However, do fix some untidy uses of != instead of -ne when comparing
with $?. Make the code easier to understand by reversing the logic
and using -eq and ||.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This makes the code look deliberate instead like something has been
accidentally omitted.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This was out of date due to the removal of service_check_reconfigure()
and similar.
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): Thu Jul 13 17:57:11 CEST 2017 on sn-devel-144
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12856
This stops logger reading from stdin.
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): Sat Jun 24 14:37:48 CEST 2017 on sn-devel-144
When thousands of connections are being killed the logs are flooded
with information about connections that should be killed. When some
connections are not killed then the number not killed is printed.
This is the wrong way around! When debugging "fail-back" problems, it
is important to know details of connections that were *not* killed.
It is almost never important to know the full list of all connections
that were *supposed* to be killed.
Instead, print a summary showing how many connections of the total
were killed. If any were not killed then print a list of remaining
connections.
Update unit tests: infrastructure for fake TCP connections, existing,
test cases, add new test cases.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Failures in startup/shutdown/releaseip/takeip are currently
incorrectly ignored.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12837
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Some configurations may set CTDB_NFS_CALLOUT to the empty string.
They may do this if they allow a choice of NFS implementations. In
this case the default call-out for Linux kernel NFS should be used.
However, statd-callout does not call nfs_callout_init() to set the
default. Therefore, statd-callout is unable to restart the lock
manager, so the grace period is never entered.
statd-callout must call nfs_callout_init() before trying to restart
the lock manager.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12589
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Thu Feb 16 09:21:03 CET 2017 on sn-devel-144
