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A convention when testing members of ctdb-util is to include the .c
file so that static functions can potentially be tested. This means
that such tests can't be linked against ctdb-util or duplicate symbols
will be encountered.
ctdb-tests-common depends on ctdb-client, which depends in turn on
ctdb-util, so this can't be used to pull in backtrace support.
Instead, make ctdb-tests-backtrace its own subsystem.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Also, rename ctdb_unit_tests to ctdb_util_tests. The sorting makes
it clear that only items from ctdb-util are tested here.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Commit f5a2037734 arguably got this
back-to-front:
2022-07-27T09:50:01.985857+10:00 testn1 ctdbd[17820]: ../../ctdb/server/ctdb_takeover.c:514 sending TAKE_IP for '10.0.1.173'
2022-07-27T09:50:01.990601+10:00 testn1 ctdbd[17820]: Send TCP tickle ACK: 10.0.1.77:33004 -> 10.0.1.173:2049
2022-07-27T09:50:01.991323+10:00 testn1 ctdb-takeover[19758]: TAKEOVER_IP 10.0.1.173 succeeded on node 0
Unfortunately there is an inconsistency somewhere in the connection
tracking code used for tickle ACKs, making this less than obvious.
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 28 09:02:08 UTC 2022 on sn-devel-184
The include isn't strictly necessary, since it is included via
common/reqid.c anyway. However, it is a useful hint.
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 Jul 22 17:01:00 UTC 2022 on sn-devel-184
root can read files for which the mode prohibits reading, so this test
case fails when run as root. Work around this when running as root.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Some versions of nfs-utils (e.g. recent CentOS 7) use /etc/nfs.conf
but do not include the nfsconf utility to extract values from the
file. However, git has an excellent conf file parser, so use it as a
last resort.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
For example:
In /home/martins/samba/samba/ctdb/tools/onnode line 304:
[ "$nodes" != "${nodes%[ ${nl}]*}" ] && verbose=true
^---^ SC2295 (info): Expansions inside ${..} need to be quoted separately, otherwise they match as patterns.
Did you mean:
[ "$nodes" != "${nodes%[ "${nl}"]*}" ] && verbose=true
For more information:
https://www.shellcheck.net/wiki/SC2295 -- Expansions inside ${..} need to b...
Who knew? Thanks ShellCheck!
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This works as an unprivileged user, so avoids unnecessary errors when
running in test mode (and not as root):
2022-02-18T12:21:12.436491+11:00 node.0 ctdbd[6958]: ctdb_sys_check_iface_exists: Failed to open raw socket
2022-02-18T12:21:12.436534+11:00 node.0 ctdbd[6958]: ctdb_sys_check_iface_exists: Failed to open raw socket
2022-02-18T12:21:12.436557+11:00 node.0 ctdbd[6958]: ctdb_sys_check_iface_exists: Failed to open raw socket
2022-02-18T12:21:12.436577+11:00 node.0 ctdbd[6958]: ctdb_sys_check_iface_exists: Failed to open raw socket
The corresponding porting test would now become pointless because it
would just confirm that "fake" does not exist. Attempt to make it
useful by using a less likely name than "fake" and attempting to
detect the loopback interface.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
A public IP address can be released in between (and probably before)
attempts to send ARPs. One situation when this can occur is when a
cluster is shutting down: node A shuts down first, public IPs from
node A are taken over by node B, node B is shutdown.
Notice this when it occurs and cancel further attempts to send ARPs.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
For the tickle ACK logging, render the connection in a buffer. This
produces more complete information.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Make this fully self-contained in the recovery daemon and avoid
indexing by PNN.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This structure is now standalone, so indexing by PNN can be avoided
via a subsequent commit. Index by culprit here to make this commit
simple.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
For memory usage, no need to dump all of this data on every failed
monitor event. The first call will be enough to diagnose the problem.
The node will then go unhealthy, drop clients and memory usage should
then drop.
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 Jul 22 07:32:54 UTC 2022 on sn-devel-184
If filesystem usage exceeds the unhealthy threshold then checking
memory usage checking is not done. Always do them both.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Use printf to allow easier line breaks and use some early returns.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
About to modify this file, so reformat first as per recent Samba
convention.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
SC2164 (warning): Use 'cd ... || exit' or 'cd ... || return' in case cd fails.
A problem can only occur if /etc/ctdb/ or an important subdirectory is
removed, which means the script itself would not be found. Use && to
silence ShellCheck.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
When a node is starting, CTDB reports remote nodes as unhealthy by
default. This can be misleading.
To hide this, report an "UNKNOWN" pseudo state when a remote node is
not disconnected and the runstate is less than or equal to
"FIRST_RECOVERY".
Signed-off-by: Vinit Agnihotri <vagnihotri@ddn.com>
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These would be unintended errors. The block should be omitted to keep
the default value.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
eval is not required and causes the follow ShellCheck warning:
SC2294 (warning): eval negates the benefit of arrays. Drop eval to
preserve whitespace/symbols (or eval as string).
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 Jun 24 10:40:50 UTC 2022 on sn-devel-184
The current code requires the use of eval in the NFS callout handling
to facilitate testing. Improve the code to remove this need.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The current code works in all current cases but is lazy and wrong.
Fix it to avoid breaking on code changes involving different thread
setups.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Tests can be run by hand using different distro styles, such as:
CTDB_NFS_DISTRO_STYLE=systemd-debian \
./tests/run_tests.sh ./tests/UNIT/eventscripts/{06,60}.nfs.*
This fixes known problems for Debian styles, so the tests now pass for
the following values of CTDB_NFS_DISTRO_STYLE:
systemd-redhat
sysvinit-redhat
systemd-debian
sysvinit-debian
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
At the moment test results can be influenced by real system
configuration files.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
For example, in Sys-V init "rquotad" is started by the main "nfs"
service. At the moment the call-out can't distinguish between this
case and "should never be run". Services set to "AUTO" are
hand-stopped/started via service_stop()/service_start() on failure via
restart_after.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This logic needs improving, so factor the decision making into new
functions service_or_manual_stop() and service_or_manual_start().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Drop the argument. These now just stop/start the overall NFS service,
so rename them appropriately.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These are only called in one place and should be done inline, since
that is less confusing.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Samba is reformatting shell scripts using
shfmt -w -p -i 0 -fn
so update this one before editing.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Directly using dbgtext() with file logging results in a log entry with
no header, which is wrong. This is a regression, introduced in commit
10d15c9e5d. Prior to this, CTDB's
callback for file logging would always add a header.
Use DEBUG() instead dbgtext(). Note that DEBUG() effectively compares
the passed script_log_level with DEBUGLEVEL, so an explicit check is
no longer necessary.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15090
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Jun 16 13:33:10 UTC 2022 on sn-devel-184
These aren't set anywhere in the code.
Drop the log argument because it is also no longer used.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15090
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
This allows ctdb_set_child_logging() to work.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15090
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
If the cluster filesystem is unavailable then I/O errors may occur.
This is no worse than contention, so don't ban. This avoids having
services unavailable for longer than necessary.
Update the associated test to simply confirm that this results in a
leaderless cluster, and leadership is restored when the lock can once
again be taken.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdb_takeover.c and eventscript.c no longer use this.
ipalloc_common.c has never used it.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
After a recovery that takes a significant amount of time the logs are
flooded with messages about every resent call.
Log a summary instead and demote per-call messages to INFO level.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Signed-off-by: Pavel Filipenský <pfilipen@redhat.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Signed-off-by: Pavel Filipenský <pfilipen@redhat.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
These are easier to debug with a backtrace.
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 May 3 10:13:23 UTC 2022 on sn-devel-184
Some tests make generous use of assert() and it can be difficult to
guess the cause of failures without resorting to GDB. This provides
some help.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
None of these include any files from the include/ sub-directory.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If there is an error then this pointer is unconditionally
dereferenced.
However, the only possible error appears to be ENOMEM, where a crash
caused by dereferencing a NULL pointer isn't a terrible outcome. In
the absence of a security issue this is probably not worth
backporting.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If there is an error then this pointer is unconditionally
dereferenced.
However, the only possible error appears to be ENOMEM, where a crash
caused by dereferencing a NULL pointer isn't a terrible outcome. In
the absence of a security issue this is probably not worth
backporting.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The only value this now provides is use of a notification script to
log when start/stop are called. This was used for debugging strange
start/stop failures, which have not been recently seen. Also, systemd
does a good job of logging start/stop.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
IPs are dropped in the shutdown event.
If a watchdog is necessary to ensure public IPs aren't on interfaces
when CTDB isn't running, then see ctdb-crash-cleanup.sh.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This further untangles public IP handling from the main daemon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is functionally the same as ctdb_release_all_ips().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This was added to be able to notice startup failures when unknown
tunables were present in the configuration. Tunables are now set by
the daemon, so this is no longer necessary.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This aims to test ctdb_tunable_load_file() but also exercises
ctdb_tunable_names() and ctdb_tunable_get_value().
ctdb_tunable_set_value() is indirectly exercised via
ctdb_tunable_load_file().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Instead of documenting test cases with a comment, this allows them to
be documented via an argument to a function that is printed when the
test case is run. This makes it easier locate test case failures when
commands used by test cases look similar,
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This allows the provided output to be specified a little more
carelessly. As per the comment, trailing newlines can't be matched
anyway, so this is notionally a bug fix.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Samba is reformatting shell scripts using
shfmt -w -p -i 0 -fn
so update this one before editing.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
We used to use this for building test packages for standalone CTDB.
However, our testing has now changed to use binary tarballs. We
believe we were the only users of this spec file and expect CTDB to
only be installed as part of a top-level Samba build, especially in
RPM form.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
./configure && make && make install is will always work.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The changes are made to replace the deprecated network commands
(ifconfig,netstat) with the new commands
(ip addr,ss) respectively
Signed-off-by: Archana Chidirala <archana.chidirala.chidirala@ibm.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Mar 8 12:30:53 UTC 2022 on sn-devel-184
Issue is reported here:
853 case CTDB_CONTROL_DB_VACUUM: {
854 struct ctdb_db_vacuum db_vacuum;
855
>>> CID 1499395: Uninitialized variables (UNINIT)
>>> Using uninitialized value "db_vacuum.full_vacuum_run" when calling "ctdb_db_vacuum_len".
856 CHECK_CONTROL_DATA_SIZE(ctdb_db_vacuum_len(&db_vacuum));
857 return ctdb_control_db_vacuum(ctdb, c, indata, async_reply);
858 }
The problem is that ctdb_bool_len() unnecessarily dereferences its
argument, which in this case is &db_vacuum.full_vacuum_run. Not a
security issue because the value copied by dereferencing 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): Wed Feb 23 02:02:06 UTC 2022 on sn-devel-184
Debugging a test failure here without GDB is not possible. Dumping a
stack trace gives a good hint.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Instead of repeatedly running a test binary.
Run time for these tests reduces from ~90s to ~75s.
When run under valgrind, the run time for protocol_test_001.sh reduces
from ~390s to <1s.
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 Feb 14 04:32:29 UTC 2022 on sn-devel-184
The current method of repeatedly running a binary has huge overhead,
especially with valgrind.
protocol_test_iterate_tag() allows output that is usually used for
hinting where a test failure occurred to be replaced with a tag
stored in a buffer, which is printed on test failure.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
A stalled node probably continues to hold the cluster lock, so confirm
elections work in this case.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14958
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 Feb 14 02:46:01 UTC 2022 on sn-devel-184
Elections should now be quite rare, so always log when one begins.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14958
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is currently missed when the cluster lock is lost.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14958
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The problem here is that election-in-progress must be set to
potentially avoid restarting the election broadcast timeout in
main_loop(), so this is already done by leader_handler().
Have force_election() set election-in-progress for all election types
and do not bother setting it in cluster_lock_election().
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14958
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Election-in-progress is set by unknown leader broadcast, so needs to
be cleared in all cases when election completes.
This was seen in a case where the leader node stalled, so didn't send
leader broadcasts for some time. The node continued to hold the
cluster lock, so another node could not become leader. However, after
the node returned to normal it still did not send leader broadcasts
because election-in-progress was never cleared.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14958
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is many years out of date and recent changes make it worse. It
is unlikely that anyone has the time to fix this in the near future,
so remove it because it is misleading.
Database recovery steps are well documented in comments in the
recovery helper. Cluster monitoring documentation can be re-added
when things stop changing.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Rename test, clean up node selection. Duplicate for for banning and
removing leader capability cases. Repeat all 3 tests without cluster
lock.
All of the standard election triggers are now tested, with and without
cluster lock. Due to test cluster configuration limitations, the
tests without cluster lock are skipped on a real cluster.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Can be used to disable default options, such as cluster lock.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Rename this configuration item and move it into the [cluster]
configuration section.
Update documentation to match.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Retain "recovery lock" and mark as deprecated for backward
compatibility.
Some documentation is still inconsistent.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If the cluster is partitioned then nodes in one partition can not take
the lock anyway, so election is pointless. It just introduces
unnecessary corner cases.
Instead just race for the lock.
When a node notices a lack of leader and notifies other nodes of an
election via an unknown leader broadcast, the cluster lock election is
hooked into this broadcast.
The test needs to be updated because losing the cluster lock can now
result in a leadership change.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This doesn't make sense if leader broadcasts are used.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The following command names are changed:
recmaster -> leader
setrecmasterrole -> setleaderrole
Command output changed for the following commands:
status
getcapabilities
Documentation and tests are updated to reflect these changes.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This seems pointless but it localises a subsequent change and also
starts a terminology change in the tool code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Now all references to ctdb->recovery_lock are encapsulated in the
cluster lock code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It is no longer just a recovery lock but is always held by the cluster
leader.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdb_test_init() doesn't actually pass arguments to local_daemons.sh.
This needs to be done using ctdb_nodes_start_custom().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The introduction of the leader broadcast timeout provides an
alternative to the current leader validation. Using the leader
broadcast may not be as fast but it is more correct.
When the leader node is stopped or banned, the only way of triggering
an election is currently to fetch the leader's node map to check
whether the it is still active. This is because the leader will no
longer push the node map to other nodes. However, having all nodes
fetch the node map from an inactive leader may be unreliable.
Most of the other cases are also handled more reliably by the leader
broadcast timeout.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This no longer occurs at startup due to the leader broadcast timeout.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If no leader broadcasts have been received from the leader for more
than 5s then trigger an election.
Apart from being sane behaviour, this avoids elected-before-connected
bugs at startup, where a node elects itself leader before it is
connected to other nodes.
When a node processes a leader broadcast timeout it sends an unknown
leader broadcast to all nodes. That causes cancellation of the leader
broadcast timeout across the cluster. This is particular important at
startup, since nodes may be started in a staggered fashion. Without
this cluster-wide cancellation, a node might notice the lack of
leader, win an election and complete a recovery before other nodes
notice the lack of leader. When the leader broadcast timeout finally
occurs on the other nodes then they'll put the cluster back into an
unnecessary recovery.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These are triggered on 1 second timer, but are only sent if the node
is the current leader and there is no election underway.
If this node can not be the leader then ensure it releases the
recovery lock.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
CTDB_SRVID_LEADER will be regularly broadcast to all connected nodes
by the leader.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
An alternate election method will be added that doesn't use the
election timeout, so this provides a common way for recognising when
an election is in progress.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This makes the code self-documenting.
In ctdb_election_data() there is a slight behaviour change. An
inactive node will now try to lose an election. This case should not happen
because:
* An inactive node can't win an election round and then send a reply.
* Any inactive node should never start an election. There are
currently places where this happens and they will be fixed later.
There is an instance where this could be used in
validate_recovery_master() but this involves a more serious logic
change. Overhaul this function later.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
There are some remaining instances in this file but they will be
removed in subsequent commits.
Modernise debug macros as appropriate.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Recovery master is being renamed to leader. This follows clustering
best practice (e.g. RAFT).
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is currently referenced in a number of inconsistent
ways, including:
* pnn
* rec->ctdb->pnn
* ctdb->pnn
* ctdb_get_pnn(ctdb)
* ctdb_get_pnn(rec->ctdb)
The first of these always requires some thought about the context - is
this the node PNN or some other PNN (e.g. argument to function)?
rec->pnn is now always used when referring to the recovery daemon's
PNN.
Doing this also reduces reliance on struct ctdb_context internals.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ban_time argument is always ctdb->tunable.recovery_ban_period, so
build this in and make the calling code more readable.
ctdb_ban_node() already logs how long a node is banned for, so don't
repeatedly log this.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
All other arguments are available via rec, so simplify.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
pnn and nodemap are both available via the rec context, so simplify.
vnnmap is unused.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The pnn and nodemap arguments to force_election() and
send_election_request() are always effectively rec->pnn and
rec->nodemap, so simplify.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is currently referenced in a number of inconsistent
ways, including:
* pnn
* rec->ctdb->pnn
* ctdb->pnn
* ctdb_get_pnn(ctdb)
* ctdb_get_pnn(rec->ctdb)
The first of these always requires some thought about the context - is
this the node PNN or some other PNN (e.g. argument to function)?
The intention is to always use rec->pnn when referring to the recovery
daemon's PNN.
Doing this also reduces reliance on struct ctdb_context internals.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Make the code self-documenting.
This preempts an upcoming change to terminology but doing it now saves
a lot of churn.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The recovery and takeover helpers can run for a while and generate
non-trivial logs, so have them reopen their logs to support log
rotation.
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 Jan 17 04:36:30 UTC 2022 on sn-devel-184
Recovery and takeover helpers can run for a while and generate
non-trivial logs. They should support log reopening.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Pass on a SIGHUP to the recovery daemon, which will then reopen its
logs.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Now that CTDB uses Samba's file logging it is possible to reopen the
logs, so that log rotation can be supported.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
SIGHUP is for reopening logs, SIGUSR1 is for reconfigure.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This has support for log rotation (or re-opening).
The log format is updated to use an RFC5424 timestamp and to include a
hostname. The addition of the hostname allows trivial merging of log
files from multiple cluster nodes.
The hostname is faked from the CTDB_BASE environment variable during
testing, as per the comment in the code. It is currently faked in a
similar manner in local_daemons.sh when printing logs, so drop this.
Unit tests need updating because stderr logging no longer produces a
"PROGNAME[PID]: " header.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This can be overridden by DEBUG_FILE, whereas DEBUG_STDERR can not.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
RFC5952 says the existing style is not recommended and the [] style
should be employed.
There are more optimised ways of adding the square brackets but they
tend to be uglier.
Parsing IPv6 sockets without [] is now tested indirectly by parsing
examples in both styles and comparing the results.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Signed-off-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Jan 13 17:02:21 UTC 2022 on sn-devel-184
Add tests to confirm that square brackets are handled and that
IPv4-mapped IPv6 addresses are parsed as expected.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>
Having this as a small static .text is simpler than having to create
this on the stack.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
According to "man rindex" on debian bullseye rindex() was deprecated
in Posix.1-2001 and removed from Posix.1-2008.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This has been found by covscan and make analyzers happy.
Pair-programmed-with: Andreas Schneider <asn@samba.org>
Signed-off-by: Pavel Filipenský <pfilipen@redhat.com>
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue Oct 12 23:24:18 UTC 2021 on sn-devel-184
test stub code has been updated to handle this, so now let's put it
to work.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14826
RN: Correctly ignore comments in CTDB public addresses file
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Note that order of sed expressions matters: the expression to delete
comment lines must come first as the second expression would transform
# comment
to
comment
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14826
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Remote nodes are already initialised as UNHEALTHY when the node list
is initialised at startup (ctdb_load_nodes_file() calls
convert_node_map_to_list()) and when disconnected (ctdb_node_dead()).
So, drop this code.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
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 Sep 9 02:38:34 UTC 2021 on sn-devel-184
If this node is not connected to a node then we shouldn't know
anything about it. The state will be pushed later by the recovery
master.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Now that there are separate disable/enable controls used by the ctdb
tool this control can ignore any flag updates for the current nodes.
These only come from the recovery master, which depends on being able
to fetch flags for all nodes.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
CTDB_SRVID_SET_NODE_FLAGS is no longer sent so drop monitor_handler()
and replace with srvid_not_implemented(). Mark the SRVID obsolete in
its comment.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The code that handles this message is
ctdb_recoverd.c:monitor_handler(). Although it appears to do
something potentially useful, it only logs the flags changes. All
changes made are to local structures - there are no actual
side-effects.
It used to trigger a takeover run when the DISABLED flag changed.
This was dropped back in commit
662f06de9f.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
When flags change, promote the message to NOTICE level and switch the
message to the style that is currently generated by
ctdb-recoverd.c:monitor_handler(). This will allow monitor_handler()
to go away in future.
Drop logging when flags do not change. The recovery master now logs
when it pushes flags for a node, so the lack of a corresponding
"changed flags" message here indicates that no update was required.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Don't trust the old flags from the recovery master.
Surrounding code will change in future comments, including the use of
old-style debug macros, so just make this change clear.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Note that there a change from broadcast to a directed control here.
This is OK because the recovery master will push flags if any nodes
disagree with the canonical flags fetched from a node.
Static function ctdb_ctrl_modflags() is no longer used to drop it.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
DISABLED is UNHEALTHY | PERMANENTLY_DISABLED, which is not what is
intended here. Luckily, it doesn't do any harm because nodes are
marked unhealthy at startup anyway.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These are CTDB_CONTROL_DISABLE_NODE and CTDB_CONTROL_ENABLE_NODE.
For consistency these match CTDB_CONTROL_STOP_NODE and
CTDB_CONTROL_CONTINUE_NODE. It would be possible to add a single
control but it would need to take data.
The aim is to finally fix races in flag handling. Previous fixes have
improved the situation but they have only narrowed the race window.
The problem is that the recovery daemon on the master node pushes
flags to nodes the same way that disable and enable are implemented.
So the following sequence is still racy:
1. Node A is disabled
2. Recovery master pulls flags from all nodes including A
3. Node A is enabled
4. Recovery master notices A is disabled and pushes a flag update to
all nodes including node A
5. Node A is erroneously marked disabled
Node A can not tell if the MODIFY_FLAGS control is from a "ctdb
disable" command or a flag update from the recovery master.
The solution is to use a different mechanism for disable/enable and
for a node to ignore MODIFY_FLAGS controls for their own flags.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will usually happen if flags on the node in question change, so
keeping the code simple and pushing to all nodes won't hurt. When all
nodes come up there might be differences in connected nodes, causing
such "fix ups". Receiving nodes will ignore no-op pushes.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The resulting code structure looks a little weird. However, there is
another condition that requires the flags to be pushed that will be
inserted before the continue statement in a subsequent commit..
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14784
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
pylint warns:
Use lazy % formatting in logging functions
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue Jul 20 05:29:18 UTC 2021 on sn-devel-184
Don't bother with "as e" to avoid warning about unused variable.
Don't use bare "except:" (though pylint still complains about this
version).
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Removes an unnecessary level of indirection: defaults and help strings
are now where they are expected. Also removes some global variables.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Removes the need for the global variables currently associated with
this processing. Also removes unnecessarily double-handling the
defaults, which are assigned to the global variables and set via
add_argument().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Avoids numerous pylint warnings.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Due to the number of flake8 and pylint warnings it is unclear if the
source has Python 3 incompatibilities. These will be cleaned up in
subsequent commits.
Signed-off-by: "L.P.H. van Belle" <belle@bazuin.nl>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
In ShellCheck 0.7.2, POSIX compatibility warnings got their own SC3xxx
error codes, so now both the old and new codes need to be ignored.
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 Jun 25 10:06:48 UTC 2021 on sn-devel-184
Fedora 34 now has a shell function for the which command, which causes
these uses of which to return the enclosing function definition rather
than the executable file as expected.
The event script unit tests always expect the stub service command to
be used, so the conditional in these functions is unnecessary.
$CTDB_HELPER_BINDIR already conveniently points to the stub directory,
so use it here.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
The socket is set close-on-exec but that doesn't help for processes
that do not exec(). This should be done for all child processes.
This has been seen in testing where "ctdb shutdown" waits for the
socket to close before succeeding. It appears that lingering
vacuuming processes have not closed the socket when becoming clients
so they cause "ctdb shutdown" to hang even though the main daemon
process has exited. The cause of the lingering vacuuming processes
has been previously examined but still isn't understood.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
