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This avoids having to export it in every file that includes the
functions file.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Added so that nfs_check_services() could be run against an arbirary
directory. However, with the function moved to the event script, this
isn't useful. CTDB_NFS_CHECKS_DIR can be used for testing instead.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
There is no need to explicitly check that recovery is not active before
sending TRANS33_COMMIT control. Just try TRANS3_COMMIT control and if
recovery occurs before the control is completed, the control will fail
and it can be retried.
Make sure g_lock lock is released after the transaction is complete.
Also, add timeout to the client api.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Since g_lock checks if the process exists in case of conflicting lock,
there is no need to register srvid.
Transaction start returns a transaction handle and transaction
commit/cancel will free that handle. Since we cannot call async code
in a talloc destructor, this avoids the use of talloc destructor for
cancelling the transaction.
If user frees the transaction handle instead of calling transaction
cancel, it will leave stale g_lock lock. This stale g_lock lock will
get cleaned up on next transaction attempt.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
If a conflicting g_lock entry is found, check if the process exists.
This matches Samba implementation.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Instead of delaying for 1 second, try to get g_lock lock again after
1 milli-second.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
In delete_record, sync call to ctdb_ctrl_schedule_for_deletion will
cause nested event loops. Instead wrap the async version.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
In commit 1ee7053180, the
ctdb_rec_buffer_traverse always passes NULL for header. So explicitly
extract header from the data.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Logging that node has lost election is less useful than knowing which
node has won the election.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
The ipalloc code doesn't need a CTDB context so neither should the
code that tests it.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
No longer require CTDB context but pass in number of nodes, algorithm,
no_ip_failback and force_rebalance_nodes.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
At the moment IP is short-circuited when there are no available IP
addresses. However, if some IP addresses are already allocated then
"no available IP addresses" means that all the addresses should
(probably) be released. The current short-circuit means that no
already hosted IP addresses will be released.
The short-circuit exists to avoid lots of messages saying that all IP
addresses can not be assigned at startup time. So, add a check to
ipalloc_can_host_ips() so that it succeeds if IP addresses are already
allocated to nodes.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Abstracts out code involving internals of IP allocation state.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is never used in the allocation algorithms. It is only used when
building the merged IP list.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
How the existing IP layout is constructed and how the merged IP list is
sorted are important aspects of the IP allocation algorithm. Construct the
merged IP list when known and available IPs are assigned.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Use ctdb_fetch_remote_public_ips() inline to fetch each list. Assign
them into the IP allocation state separately.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Factor out new function ctdb_fetch_remote_public_ips() to fetch known
or available public IP addresses, according to flags.
This also drops the hack where the array from a
ctdb_public_ip_list_old was assigned to a pointer in a
ctdb_public_ip_list.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It isn't used outside this function, so just use a local variable.
This makes create_merged_ip_list() independent of the CTDB context.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It is only run during a takeover run and only logs errors. It doesn't
actually do anything to fix potential errors. The takeover run should
fix any inconsistencies anyway.
Instead, leave a comment in the recovery daemon's monitoring loop to
add proper remote IP verification later.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is unnecessary. IP allocation state already has a node count and
"i" is already a PNN.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Deleted (and other inactive) nodes will have an empty list of known
IP addresses.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This pointer is for an array that is always allocated. The check is
meant to skip a node that has no IP addresses. However, when there
are no IP addresses the loop below will not do anything anyway.
Add this as a check at the beginning of the function instead.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
No need to allocate these and iterate as
read_ctdb_public_ip_info_node() now returns a usable array.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If there is per-node data then each chunk is read in a separate call
and is cherry-picked out into known_public_ips[] for each node. This
is confusing.
Instead, a single call now reads all data for multiple nodes and
returns complete arrays of known and available IP addresses.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It isn't used outside this function. Instead, update k directly.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Known public IPs array is now dynamically allocated instead of
allocated once with artificial size limit.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These tests aren't run anywhere. They were used to test internal
functions during development.
The aim is to simplify this test program so that it can be linked with
the ipalloc subsystem, allowing removal of ctdbd_test.c and all of its
complications.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
In case of database recovery failure, if there are no banning credits
assigned, then the async computation is never terminated. The else
condition is missing in (max_credits >= NUM_RETRIES) check.
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): Fri Jun 24 09:56:23 CEST 2016 on sn-devel-144
(showing what is the rule and what is the exception)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Tue Jun 21 11:48:29 CEST 2016 on sn-devel-144
... instead of --nosetsched command-line option.
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): Mon Jun 20 20:22:57 CEST 2016 on sn-devel-144
Test with 0-sized arrays in various data types.
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): Sat Jun 18 23:31:50 CEST 2016 on sn-devel-144
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Sat Jun 11 10:23:03 CEST 2016 on sn-devel-144
This makes ctdbd_wrapper usable in non-standard installs.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Once DB_PUSH_START is processed as part of recovery, push_started
flag tracks if there are multiple attempts to send DB_PUSH_START.
In DB_PUSH_CONFIRM, once the record count is confirmed, all information
related to DB_PUSH should be reset. However, The push_started flag was
not reset when the push_state was reset.
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): Wed Jun 8 14:31:52 CEST 2016 on sn-devel-144
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11956
In do_recovery, after the recovery and takeover is complete, recoverd
event is triggered. When the parallel database recovery was separated,
ctdb_recovery_helper implemented sending END_RECOVERY control which
causes recoverd event to be triggered. So when there is parallel database
recovery, recoverd event is triggered twice.
Instead move the call to run_recovered_eventscript() explicitly in
the serial recovery code path. This avoids the duplication trigger of
recoverd event.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This generates takeip-pre and releaseip-pre call-out events.
One use is to put NFS into grace before an IP is assigned to an
interface.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
A second NFS eventscript may be required, so make this code available
to it.
The initialisation code can't be evaluated in the functions file
because service_state_dir isn't yet setup, so put it in a function and
call it with other initialisation code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
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): Wed Jun 8 04:52:18 CEST 2016 on sn-devel-144
The recovery lock helper must exit when it notices its parent is gone.
However, that can take a few seconds.
The usual way of terminating the recovery daemon is for the main ctdbd
to send it a SIGTERM. Installing a handler is nice and simple.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If the process holding the recovery lock terminates unexpectedly then
the recovery daemon needs to know that the lock is no longer held.
While here, rename hold_reclock_handler() to take_reclock_handler() so
there is a clear difference between the two handler names.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This makes the API more general. If they are needed in a handler then
they can be in the private data.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will allow a simplification of the cluster mutex API, so the
private data can be registered when calling ctdb_cluster_mutex().
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It won't be called more than once by the cluster mutex code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
After the first activity on the file descriptor, ignore any subsequent
activity. Single-shot handlers are easier to write.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It isn't necessarily a file.
Don't bother changing the control, since it doesn't pervade the code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Setting the recovery lock file at startup can be done more simply.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Support for updating the recovery lock is being removed because it
isn't possible to recover from failure.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If the recovery lock setting is not consistent with that of the
recovery master then abort.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The recovery lock can not be reliably updated at run-time. If it
fails to update on some nodes then split-brain protection is gone and
there is no reasonable way to repair the situation. CTDB will have to
be restarted on all nodes. So, if this feature is being used to avoid
scheduling an outage then an outage will have to be scheduled just in
case!
To update the recovery lock, shut down CTDB on all nodes, reconfigure
the recovery lock and start CTDB again.
Those that *really* want to be able to change the recovery lock at
run-time can still do so. Set CTDB_RECOVERY_LOCK to point to a script
and this script can then be modified at run-time. However, please
don't report bugs if bad things happen...
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11946
Commit 670db6ac1d split tevent-util public
library to create tevent-unix-util public library for standalone ctdb
use. This created a public library dependency between samba and ctdb
for packaging.
Bundle tevent_unix.c in public library tevent-util as before. However,
to avoid the dependencies for packaging, standalone ctdb build will
build tevent-util as a private library with only tevent_unix.c
This simplifies any new subsystems (or libraries) which need tevent-util
and are linked in both samba and ctdb.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
The timeout RecoverTimeout (default 120) is used for control messages
sent during the recovery. If any of the nodes does not respond to any
of the recovery control messages for RecoverTimeout seconds, then it
will cause a failure of recovery of a database. Recovery helper will
retry the recovery for a database 5 times.
In the worst case, if a database could not be recovered within 5 attempts,
a total of 600 seconds would have passed. During this time period other
timeouts will be triggered causing unnecessary failures as follows:
1. During the recovery, even though recoverd is processing events,
it does not send a ping message to ctdb daemon. If a ping message is
not received for RecdPingTimeout (default 60) seconds, then ctdb will
count it as unresponsive recovery daemon. If the recovery daemon
fails for RecdFailCount (default 10) times, then ctdb daemon will
restart recovery daemon. So after 600 seconds, ctdb daemon will
restart recovery daemon.
2. If ctdb daemon stays in recovery for RecoveryDropAllIPs (default 120),
then it will drop all the public addresses. This will cause all
SMB client to be disconnected unnecessarily. The released public
addresses will not be taken over till the recovery is complete.
To avoid dropping of IPs and restarting recovery daemon during a delayed
recovery, adjust RecoverTimeout to 30 seconds and limit number of
retries for recovering a database to 3. If we don't hear from a node
for more than 25 seconds, then the node is considered disconnected.
So 30 seconds is sufficient timeout for controls during recovery.
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): Mon Jun 6 08:49:15 CEST 2016 on sn-devel-144
If the node becomes stopped or banned after recovery is marked
active, then it will never freeze the databases, and hence the
node will keep banning itself indefinitely, until ctdbd is restarted.
This is a regression from 4.3, introduced with
b4357a79d9
and
d8f3b490bb
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11945
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 Jun 1 17:36:12 CEST 2016 on sn-devel-144
This adapts the debug message in local_node_got_banned
to reflect what the function is currently doing.
This message was not adapted when the function was changed.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Jun 1 04:30:36 CEST 2016 on sn-devel-144
Both of these expand to 1. However, AF_LOCAL is a Unix domain socket,
which makes no sense when reading the code.
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 May 26 11:42:46 CEST 2016 on sn-devel-144
With an empty value the first expression adds a trailing opening
quote, so the second expression doesn't add the closing quote. Handle
this with a special case.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This doesn't need to print the family. Nothing uses it.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Stub scripts are more obvious. rc.local should only be used when
strictly necessary.
iptables_wrapper doesn't need to be no-op-ed, provided flock is
installed.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Block and unblock IP addresses using these new functions. This makes
the code more readable.
The case statement in each function is very cheap, so there is no need
to prematurely optimise and pass the family.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
CTDB_INIT_STYLE isn't used in this script.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Kai Blin <kai@samba.org>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Fri May 20 21:06:18 CEST 2016 on sn-devel-144
Some Linux distributions don't have a "service" compatibility command.
To avoid breaking working systems, prefer the "service" compatibility
command just in case it does some extra, unexpected magic.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Kai Blin <kai@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
Autobuild-User(master): Uri Simchoni <uri@samba.org>
Autobuild-Date(master): Tue May 17 21:21:30 CEST 2016 on sn-devel-144
If this fails, we want to know which states it wanted to move to. Don't do the
return before the debug.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Sat May 14 03:06:05 CEST 2016 on sn-devel-144
Add CTDB_NFS_STATE_FS_TYPE and CTDB_NFS_STATE_MNT config options, show use in
nfs-ganesha-callout. Since the callout script is only an example, we
officially don't have default values for these.
Signed-off-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Comment typos and clarifications, erroneous variable names, corrected
pathnames, reorganizing variables, and squashing a few non-fatal
scripting errors.
Signed-off-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
If a recovery is going to be done then this will be followed by a
takeover run anyway. So, there's no use doing the takeover run
checks, potentially doing a takeover run and then doing a recovery.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The recovery daemon should be less involved in the service monitoring
logic.
The cases handled here are already handled elsewhere:
* When a node becomes unhealthy/healthy the monitoring code will
trigger a takeover run
* When a node is disabled/enabled the ctdb CLI tool will trigger a
takeover run
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
It will just become healthy again in the next monitor cycle.
Instead, let the recovery master ban it if the problem persists.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Banning is now handled by the takeover code sending banning credit
messages.
This commit makes a change in behaviour quite obvious. Takeover runs
were initiated from several locations in the code but banning was only
done from one of these locations. Now banning can be done from any
failed takeover run.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Post-process failues and only send banning credits to the node with
the most failures.
If there is a widespread problem or a problem on the recovery master
node then this should help avoid banning all the nodes.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will allow banning credits assignments to be limited according to
some criteria.
Note that this only matters when multiple controls are sent to each
node: RELEASE_IP and TAKEOVER_IP. This doesn't change the behaviour
for IPREALLOCATED.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Banning credits are now assigned by takeover runs called from all
locations in the recovery daemon. Previously this only happened from
one of the callers. When separating out the takeover run code the
behaviour should be consistent.
The callback (and corresponding data) passed to ctdb_takeover_run() is
now ignored. Dropping this will allow the interface between the
recovery daemon and IP takeover to be simplified.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Probably due to oversight, this is currently only used for the
"takeip" step.
This does consistent error handling and provides a layer of
indirection to the passed callback, so use it for "releaseip" and
"ipreallocated" steps too.
The callback data now needs to be initialised before the first
possible jump to "ipreallocated".
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Abstract out the initialisation of the callback data. Later, we'll
need to do it multiple times or move it.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The ipreallocated control has been in CTDB for a long time.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These tests do not use ctdb tool stub anymore.
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): Wed May 11 02:19:20 CEST 2016 on sn-devel-144
Since there are no public IPs setup, these tests do not really test the
functionality.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This tested parse_nodestring function from tools/ctdb.c. However,
ctdb.c is soon going to be replaced with the code using new client API.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Now all the IP takeover code for non-master node is in this function.
The function can always be renamed to something more suitable.
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): Fri May 6 15:10:59 CEST 2016 on sn-devel-144
Update log levels and messages, comments and wrapping of long lines.
No functional changes.
Note that interfaces_have_changed() already does adequate logging.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
When public IP checking is disabled, verify_local_ip_allocation()
still retrieves known IP addresses and runs through a loop that does
nothing.
Instead, completely skip the retrieval and checking loop.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This makes verify_local_ip_allocation() self-contained and simplifies
main_loop().
Due to indentation changes, this commit is most easily read when
ignoring whitespace.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
There is no need to return one of several states and then trigger an
election for one of those return states. Have the recovery master
validation trigger the election directly and just return whether
monitoring should continue.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Change this to return just 0 or -1. It isn't monitoring anything.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
update_local_flags() never returns MONITOR_ELECTION_NEEDED, so drop
this entire if-statement.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Deferred attach processing is done unconditionally at this point. It
is then done again if recovery lock checking is done and completes
successfuly. If the recovery lock checking fails then it should not
be done at all.
Move this processing so it is done with the early exit when the
recovery lock is not being used.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue May 3 08:08:31 CEST 2016 on sn-devel-144
If the buffer size provided is not sufficient, then return the required
buffer length.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This means that the packet allocation will happen just before push
functions are called.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This follows the convention used for marshalling routines for ctdb data types.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This currently fails exactly when it is needed: when there is a
dangling link pointing into an unmounted filesystem. This happens
because [ -e <dangling-link> ] returns false. The solution is simply
to remove that check.
Now the first condition in the "if" statement catches the backward
compatibility case where $GANRECDIR used to be a directory. It will
also catch other problems, such as if a file has been created in this
location. If nothing exists then it will silently succeed (due to
-f).
The second case catches a symlink pointing to the wrong place (e.g. in
an unmounted filesystem).
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Apr 30 04:28:13 CEST 2016 on sn-devel-144
The cluster mutex code already passes the latency and expects the
handler to update the statistics.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdb_recovery_have_lock(), ctdb_recovery_lock(),
ctdb_recovery_unlock() are only used by recovery daemon, so move them
there.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This means that the cluster mutex handle can now be treated as opaque.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
All of the ctdb_cluster_mutex_* infrastucture can now handle an
arbitrary mutex.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The underlying change is to allow the cluster mutex argstring to
optionally contain a helper command. When the argument string starts
with '!' then the first word is the helper command to run. This is
now the standard way of changing the helper from the default.
CTDB_CLUSTER_MUTEX_HELPER show now only be used to change the location
of the default helper when testing.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is currently just treated as the name of a lock file. However,
it is really some arbitrary arguments to lock helper.
Therefore, it should be parsed and passed as separate arguments to the
lock helper.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Replace the file descriptor for the recovery lock in the CTDB context
with the cluster mutex handle, where non-NULL means locked.
Attempting to take the recovery lock is now asynchronous and no longer
blocks the recovery daemon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Unlike fcntl(2), some other helper might need to explicitly take
action to release a mutex. This can be done by catching SIGTERM.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This implements the type of fcntl locking that the recovery lock uses.
The intent is to use it for multiple locks and allow the choice of
helper to be configured.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If the reclock is set then print it, otherwise print nothing.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is currently only used to check whether the recovery lock can be
taken. However, name it more generally in anticipation of using it
for general cluster mutex taking and testing.
No functional changes. A couple of debug message simplifications and
code rearrangements.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is used to reply to the recmode control for all the different
cases. The callers can later be generalised to use a pointer, which
can then be used for recovery lock handling in different contexts.
Note that the handle is now freed in set_recmode_handler() rather than
the callbacks.
There is one difference in behaviour. Deferred attach calls are now
processed in the timeout case, where they weren't before. That's a
bug fix!
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
'0' = Child took the mutex
'1' = Unable to take mutex - contention
'2' = Unable to take mutex - timeout
'3' = Unable to take mutex - error
This is a straightforward API. When the child is generalised to an
external helper then this makes it easier for a helper to be, for
example, a simple script.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Use the more general name "cluster mutex", since we are likely to end
up with more than one cluster-wide lock. There will probably be a
dedicated recovery lock, held only during recovery, and also a second
lock that is held by the master node. Currently one lock is used for
both purposes.
At the moment the struct and functions are involved with setting the
recovery mode. However, they'll be abstracted out to more generally
deal with the cluster mutexes, so "recmode" -> "cluster_mutex". Drop
"set" from names, since this is used to test the lock. Also drop
"ctdb" prefix from functions, since they are local to this file. The
struct will eventually be a long-lived handle that will release the
mutex when freed, so name it accordingly.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
LVS and NAT gateway support had bit-rotted. We don't use any of these
in scripts/tests and we very much doubt anyone else uses them.
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 Apr 25 10:34:47 CEST 2016 on sn-devel-144
This can list the different aspects of status: master, list, status.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Tweak "ctdb natgw natgwlist" to keep output format the same.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
In particular, LVS won't work at all if there are no public IP
addresses.
This is a temporary solution until a generic reconfiguration hook is
implemented.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Why allocate all that memory and transfer all that data across the
socket?
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
When external monitoring is enabled for an NFS service using
service_check_cmd then $ctdb_check_rpc_out is empty because the
internal RPC checking isn't used. This results in empty log messages
like:
60.nfs: ERROR:
or:
60.nfs: WARNING:
Improve this so it at least says:
60.nfs: ERROR: monitoring service "statd" failed
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Some controls are fire-and-forget (CTDB_CTRL_FLAG_NOREPLY). Since there
is no reply received, the opcode in the ctdb_reply_control structure
never gets set.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
These functions were used in the transaction code. These controls did
not use server_id structure defined in samba, so samba would not use them.
Instead check if the process exists for conflicting g_lock entry.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
These controls have never been used and also they do not use the server_id
structure defined in samba. In future, similar controls can be added to
register/unregister using proper server_id structure.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This test sets TakeoverTimeout=90 to avoid banning during takeover.
However, the setting is done on the test node instead of the recovery
master node. During "ctdb reloadips", the recovery master will used
the default value of TakeoverTimeout.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
ctdb->idr and ctdb->srv get initialized as part of ctdb_init() called
from ctdb_cmdline_init().
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Get rid of the range reserved for traversals since it's not used.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Don't do a percentage calculation for either memtotal or swaptotal if they
are zero.
Signed-off-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
ss with a filter is much faster than post-processing output from
netstat. CTDB already has a hard dependency on iproute2 for IP
address handling, so depending on ss is no big deal.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This currently causes monitor failure.
Log a warning instead. If there is a transient issue, such as NFS
being restarted in the background, then the thread count file should
be there the next time around so the count can be adjusted if
necessary.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
For "master", if there is a master then print the PNN, otherwise print
nothing.
For "list", print the PNN and IP addresses without a colon in between.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This simply calls out to the wrapper, so that commands are changed as
follows:
ctdb lvsmaster -> ctdb lvs master
ctdb lvs -> ctdb lvs list
This provides a simple, extensible interface and means that "ctdb lvs
status" is also available.
Unit tests are streamlined so that there is a single test for each
CTDB state. Each test does "master", "list" and "status" sub-tests.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
To keep this commit comprehensible, 91.lvs and the CTDB CLI tool are
temporarily inconsistent. The tool will be made consistent in a
subsequent commit.
LVS now uses a configuration file specified by CTDB_LVS_NODES and
supports the same slave-only syntax as CTDB_NATGW_NODES. LVS also
uses new variable CTDB_LVS_PUBLIC_IFACE instead of
CTDB_PUBLIC_INTERFACE.
Update unit tests and documentation.
Note that the --lvs and --single-public-ip daemon options are no
longer used. These will be removed and relevant documentation
updated in a subsequent commit.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will replace the ctdb CLI tool "lvs" and "lvsmaster" options. It
also makes LVS daemon support unnecessary.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Having both "recovered" and "ipreallocated" means that everything
happens twice when there is a recovery. No need for that.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Basic error redirection improvements before writing tests.
Deleting the service during "startup" will usually fail because the
service has never been setup, so redirect output to avoid logging an
error.
Similarly, deleting the service in "ipreallocated" will always fail
the first time, which would cause an error to be logged. Given the
simplicity of the script, there's no sane way to avoid the error
sometimes and log it if it actually matters. This could potentially
be tidied up in the future by making 91.lvs stateful, in a similar way
to 11.natgw.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Testing indicates that these are good reliable defaults that can kill
many connections in a reasonable amount of time.
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 1 08:10:54 CEST 2016 on sn-devel-144
This made sense when connections were individually queued in the
daemon. However, they're now done in batch so just keep an overall
count.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
When previously killing TCP connections via the daemon there was some
latency due to each kill being sent to the daemon via a separate
control. This probably meant that when doing a 2-way kill the tickle
ACKs sent to the client end of a connection would not interfere with
listening for the reply ACK from the server end. Now that there is no
latency, the tickle ACK or RST sent to the client end can be seen as
the reply to the server end tickle ACK, and vice-versa.
To avoid this, throw away packets that look like we sent them.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The end of the connection in parentheses is not the end being killed.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Since they're being done in batch, just schedule an event to traverse
all the connections.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The handler won't be called unless there is something to read.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdb_killtcp will take up to 5 seconds to kill connections, so don't
wait in a loop. Just check if there are remaining connections on
completion and log a message either way.
Also add a test stub.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will be needed for a rewrite of the connection killing code but
it is not used yet.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will allow killing of TCP connections without daemon involvement.
It looks strange that the common code for daemon and helper is in the
server directory. Having it in the server directory means less
temporary changes to the build configuration. This code will move
into the helper itself and will no longer be used by the daemon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This allows common.h and ctdb_private.h to be dropped.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will be used in a standalone helper.
Don't worry that the API isn't clean and opaque. All of the code will
eventually move into the helper and will no longer be used by the
daemon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This function knows nothing about CTDB contexts or VNNs, so it can be
used elsewhere.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The destructor used in this instances needs a CTDB context and a VNN.
However, destructors used in other cases may need different data.
For this instance create a local structure to hold the required data.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
We don't want this code to depend on a CTDB context, so don't go
looking there for an event context.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
If one or more nodes are misbehaving during recovery, keep track of
failures as ban_credits. If the node with the highest ban_credits exceeds
5 ban credits, then tell recovery daemon to assign banning credits.
This will ban only a single node at a time in case of recovery failure.
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): Fri Mar 25 06:57:32 CET 2016 on sn-devel-144
This will be called from recovery helper to assign banning credits to
misbehaving node.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This abstraction uses capabilities of the remote nodes to either send
older PUSH_DB controls or newer DB_PUSH_START and DB_PUSH_CONFIRM
controls.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This abstraction depending on the capability of the remote node either
uses older PULL_DB control or newer DB_PULL control.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Also, rename traverse function and traverse state for recdb_records
consistently.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This variable is used to set the dmaster value for each record in
recdb_traverse().
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This will be used to limit the size of record buffer sent in newer
controls for recovery and existing controls for vacuuming.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Interface names that are too long will be truncated by strncpy(3)
later on. It is better to validate the length of each new interface
name to ensure it will be usable.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Jeremy Allison <jra@samba.org>
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 Mar 17 13:56:41 CET 2016 on sn-devel-144
On a busy system, TRANS3_COMMIT control can take upto or longer than
3 seconds. On timeout, there are few possible outcomes.
1. The transaction has completed on all nodes and TRANS3_COMMIT control
has returned. In such a case, there is no problem.
2. The transaction has completed on the local node, but TRANS3_COMMIT
control is still active. In such a case, ctdb_transaction_commit()
can return successfully. If this is being called from ctdb, then
ctdb will exit. This will cause ctdb daemon to trigger recovery
since the client exited while transaction is active. This will cause
unnecessary recovery.
3. Database recovery was started and ctdb_transaction_commit() will
retry till the recovery completes the transaction.
Increasing the timeout to 30 seconds will avoid the spurious database
recoveries when TRANS3_COMMIT control takes longer to finish.
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): Fri Mar 11 19:59:53 CET 2016 on sn-devel-144
