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'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>
