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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
If set, this was used to setup an IP takeover run on a timer after
certain updates to the public IP address configuration (e.g. "ctdb
addip").
However, "ctdb reloadips" completely manages public IP reconfiguration
and avoids the anomalies that DeferredRebalanceOnNodeAdd was
introduced to work around.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This was a workaround for trying to ensure public IP addresses are
properly rebalanced after running "ctdb addip" on multiple nodes.
"ctdb reloadips" is a better solution.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is undocumented and is not needed. It was a workaround for
trying to ensure public IP addresses are properly rebalanced after
running "ctdb addip" on multiple nodes. "ctdb reloadips" is a better
solution.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
