The monitor performs simple monitoring of a group replication cluster. It
expects no extra parameters in addition to the common monitor parameters
and will only set master and slave status bits on the servers. It is a
part of the experimental package as it is a very experimental module.
Further improvements would be to add the usage of the synced state.
The static library cannot be linked to the Jansson static library by
CMake. This appears to be a limitation in CMake and a manual combination
of the two files would be required.
For the time being, the connector is only built as a shared library.
The CHILDREN parameter expands to a list of server IPs and ports that are
direct descendants of the server that initiated the event.
Also added a note that the variables can expand to empty strings if
nothing matches the criteria of the variable.
The scripts now replace the PARENT variable with the IP and port of the
server that is the direct parent node of the server that initiated the
event. For master-slave clusters, this will be the master IP if the server
that triggered the event is a slave.
If the executed subprocess prefixes its output with either `error:`,
`warning:` or `info:`, the message will be logged on the appropriate
level. If no prefix is provided, the message is logged on the notice
level.
When the subprocess outputs a line, the message should be logged
immediately. This allows automated timestamps for the output of the
executed subprocess.
Since the thread initialization was removed from the process
initialization function, the thread finish function should not be called
in the process finish function.
By moving the initialization into Worker::run, all threads, including the
main thread, are properly initialized. This was not noticed before as
qc_sqlite initialized the main thread in the process initialization
callback.
The enums exposed by the connector are not intended to be used by the
users of the library. The fact that the protocol, and other, modules used
it was in violation of how the library is intended to be used.
Adding an internal mapping into MaxScale also removes some of the
dependencies that the core has on the connector.
Cleaned up the MaxScale version of the mysql.h header by removing all
unused includes. This revealed a large amount of dependencies on these
removed includes in other files which needed to be fixed.
Also sorted all includes in changed files by type and alphabetical
order. Removed explicit revision history from modified files.
Updated the Connector-C to 3.0.2.
Removed the `mysql_com.h` header from `maxscale/protocol/mysql.h` as it is
already included by `mysql.h` and including it causes errors with
Connector-C 3.0.2.
Organized includes in `maxscale/protocol/mysql.h`.
Basically it would be trivial to report far more operations
explicitly, but for the fact that the values in qc_query_op_t
currently, quite unnecessarily, form a bitmask.
In 2.2 that is no longer the case, so other operations will be
added there.
Apart from listeners, all DCBs will be assigned to the current
thread. This simplifies the addition of DCBs to worker threads.
Also performed a small cleanup of poll_add_dcb to make it more readable.
Thread-local non-POD types are not supported on CentOS 6 and thus they
need to be replaced with pointers to the relevant objects and initialized
at runtime.
In addition to this, functor objects don't appear to work as expected in
CentOS 6 and replacing them with a simple for-loop seems to work.
The test attempted to copy the generated CSV file from the MaxScale server
when in fact it was on the master server. Removed HEAVY label from the
test as it takes about 10 seconds to run.
Cherry-picked from commit f80cde2af149fda9c47d8f9131f82527b76af487.
