Dynamic configuration

MaxScale 2.1 supports dynamic configuration of servers, monitors and listeners. A set of new commands were added to maxadmin. See output of maxadmin help and maxadmin help { create | destroy | alter | add | remove } for more details.

Dynamic server configuration

MaxScale can now change the servers of a service or a monitor at run-time. New servers can also be created and they will persisted even after a restart.

create server: Creates a new server

destroy server: Destroys a created server

add server: Adds a server to a service or a monitor

remove server: Removes a server from a service or a monitor

alter server: Alter server configuration

alter monitor: Alter monitor configuration

With these new features, you can start MaxScale without the servers and define them later.

Dynamic listener configuration

New listeners for services can be created and destroyed at runtime. This allows the services to adapt to changes in client traffic.

create listener: Create a new listener

destroy listener: Destroy a created listener. The listener will stop handling client requests and will be removed after the next restart of MaxScale.

In addition to these commands, individual listeners can now be stopped and started.

shutdown listener: Stop a listener

restart listener: Restart a listener

Dynamic monitor configuration

New monitors can be created, modified and destroyed at runtime. This allows new clusters to be added into MaxScale by defining new monitors for them. The monitor parameters can also be changed at runtime making them more adaptive and allowing runtime tuning of parameters.

create monitor: Create a new monitor

destroy monitor: Destroy a created monitor

alter monitor: Alter monitor parameters