Using internal DCBs for query routing wasn't needed as the client DCB
could be used. This could also be done by simply routing the query again
with routeQuery.
The modulecmd functionality allows the avrorouter to easily control the
conversion process with one command. The conversion can now be started and
stopped by the user.
This also fixes a bug where the conversion would stop if there were no
binlog files present when the service was started.
MXS-1009. This commit adds a gwbuf_free after maxinfo_execute() to
free a buffer with an sql-query after it has been processed. Also,
the parse tree in maxinfo_execute_query() is now freed. The tree_free-
function was renamed to maxinfo_tree_free, since it is now globally
available.
This commit has additional changes (in relation to the 1.4.4 branch)
to remove errors caused by differences in the html and sql-sides of
MaxInfo.
The service header in include/maxscale/ contains the public part of the
service API. These functions can be safely used by the modules.
The internal header located in service/core/maxscale/ is used by the core
to initialize MaxScale at startup or to provide other services in a more
controlled way (the config_runtime, for example).
The listeners aren't really destroyed and are only stopped. Further
changes are required so that they won't be started again once they have
been destroyed.
The server test used the wrong name.
MySQL users test loaded multiple modules in one function call and wasn't
appropriate for an internal test suite test as it requires a working
installation.
The cache filter didn't set the library paths before trying to load
modules.
The binlogrouter was missing a NULL check which caused a crash.
Maxadmin now supports the runtime creation of listeners. The new 'default'
value can be used to signal values that don't need to be configured and
the default value should be used.
The config_runtime.h header contains functions that can be used to
manipulate the running configuration. Currently the header contains the
function to create, add, remove and destroy servers.
The prepared statements were router according to the real type instead of
being router to the master. This was caused by the change in the route
target function.
This commit adds a free() to null_auth_free_client_data, which plugs
the memory leak in maxinfo.
Also, this commit fixes some segfaults when multiple threads are
running status_row() or variable_row(). The functions use
statically allocated index variables, which often go out-of-bounds
in concurrent use. This fix changes the indexes to thread-specific
variables, with allocating and deallocating. This does seem to slow
the functions down somewhat.
The maxadmin interface to add servers to objects now allows a maximum of
11 objects to be listed. This will make it simpler to add a server to both
a monitor and a service in one command.
This fix allows the gap detection and the writing of an IGNORABLE event
only if master_event_state == BLR_EVENT_DONE.
Note: The hole is not being created if the event is bigger than 16MB
With the use_sql_variables_in=master option, readwritesplit should route
all user variable modifications and reads with user variables to the
master.
Previously, the modification of user variables was grouped into generic
system variables which caused all modifications to system variables to go
to the master only. The router requires a finer grained distiction between
normal system variable modifications and user variable modifications.
With the improvements to the query classifier, readwritesplit now properly
routes all user variable operations to the master and other system
variable modifications to all servers.
When a connection to the master fails, readwritesplit should always treat
it the same way. Previously, if a connection to the master was lost but it
hadn't lost the master status, the failure would be treated like a slave
server failure.
When a server is created in server_create, it sets the port to the default
of 3306 if no explicit port is defined. The code that called this function
still expected a minimum of three arguments: name, address and port.
When a service is added or removed from a service, a supplementary
configuration file is created. This allows MaxScale to survive restars and
unexpected downtime even if runtime changes to the servers of a service
have been made.
With these changes, it is possible to start MaxScale without any servers,
create servers, add the created servers to services and monitors and
restart Maxscale without losing the runtime configuration changes.
When a server is added to a monitor, an supplementary configuration file
is generated to persist this information. This will allow dynamic
modifications to server lists which will survive restarts and unexpected
downtime.
The monitor will only add new servers to its list of monitored
servers. This prevents duplicate entries in the list and makes it safe to
persist all used servers to the supplementary configuration file instead of only the ones that are not listed in the main configuration.
Servers created at runtime can now be configured to use SSL. The
configuration is only possible if the server is not in use.
The `alter server` command in maxadmin now takes a list of `key=value`
strings. This allows the user to define multiple alter operations with one
command.
The backend references now use a common closing function so that all
variables are reset to proper states. The stored queries weren't always
freed and they would leak memory if left open.
Server creation and allocation are now the same apart from the fact that
allocation only adds the server to the running configuration where as the
creation of a server also persist it to disk.
The server serialization should not be seen through the server.h API. This
allows the serialization method to change without actually having to
change the interfaces.
When a server is created via MaxAdmin, it will be serialized to disk. This
allows created servers to be retained through a restart of MaxScale.
Currently, all serialized objects are stored in one folder and there is no
structure in the created files. In the future, servers could be created
under a `servers` subdirectory so that it is easier to see what was
added. Whether there is a need for this will be seen.
The address, port, monuser and monpw parameters of an existing server can
be changed at runtime. The support for enabling SSL will come in a later
commit.
Allowing servers to be modified could also be done by destroying and
recreating them. Since the servers are never actually destroyed, it is
better to allow the alteration of the existing ones.
The `add server` command accepts a server name and either a service name
or a monitor name. It will add servers to services and monitors. Since all
monitors use the MONITOR_SERVER structures directly, the monitors need
to be stopped before new servers are added to them
