If 'dynamic_node_detection' has been set to false, then the
Clustrix monitor will not dynamically figure out what nodes are
available, but instead use the bootstrap nodes as such.
With 'dynamic_node_detection' being false, the Clustrix monitor
will do no cluster checks, but simply ping the health port of
each server.
'dynamic_node_detection' specifies whether the Clustrix monitor
should dynamically figure out what nodes there are, or just rely
upon static information.
'health_check_port' specifies the port to be used when perforing
the health check ping.
When checking the node info, also include information about wheter
a node is being SOFTFAILed. If it is, turn on the `Being Drained`
bit.
A node is SOFTFAILed with the intention of removing it, so better
not to create new connections to it as they later would be broken
when the node is actually taken down.
It is now possible to [un]softfail a Clustrix node via MaxScale
using a Clustrix monitor module command.
In case a node is successfully softfailed, the `Being Drained` bit
will automatically turned on. Similarly, if a node is successfully
unsoftfailed, the `Being Drained` bit will be cleared.
