Description

This is the document for new Scheduler: https://cwiki.apache.org/confluence/display/OPENWHISK/New+architecture+proposal

Regarding FPCSchedulerServer, it provides some APIs to access the concrete info for scheduler node. including

• /state

curl -u xxx:'xxx' http://xxx.xxx.xxx.xxx:13001/state
{"0":"104","creationCount":"0"}    # it means  current scheduler node: `scheduler0` includes `104`  total queue,  has no creating queues 

• /queue/total

curl -u xxx:'xxx' http://xxx.xxx.xxx.xxx:13001/queue/total
104 # it means includes 104 total queues

• /queue/status

curl -u xxx:'xxx' http://xxx.xxx.xxx.xxx:13001/queue/status
[{
		"data": "RunningData(Actor[akka://scheduler-actor-system/user/$Qd#905522799],Actor[akka://scheduler-actor-system/user/$Pd#-785916053])",
		"fqn": "[email protected]",
		"invocationNamespace": "xxx",
		"status": "Running",
		"waitingActivation": 0
	}, {
		"data": "RunningData(Actor[akka://scheduler-actor-system/user/$Y#-32044316],Actor[akka://scheduler-actor-system/user/$X#-359037829])",
		"fqn": "[email protected]",
		"invocationNamespace": "xxx",
		"status": "Running",
		"waitingActivation": 0
	}
 ...
 ]

• disable
  When want to gracefully shutdown the scheduler, can invoke /disable

curl -u xxx:'xxx' -X POST http://xxx.xxx.xxx.xxx:13001/disable

Related issue and scope

• I opened an issue to propose and discuss this change (#????)

My changes affect the following components

• API
• Controller
• Message Bus (e.g., Kafka)
• Loadbalancer
• Invoker
• Intrinsic actions (e.g., sequences, conductors)
• Data stores (e.g., CouchDB)
• Tests
• Deployment
• CLI
• General tooling
• Documentation

Types of changes

• Bug fix (generally a non-breaking change which closes an issue).
• Enhancement or new feature (adds new functionality).
• Breaking change (a bug fix or enhancement which changes existing behavior).

Checklist:

• I signed an Apache CLA.
• I reviewed the style guides and followed the recommendations (Travis CI will check :).
• I added tests to cover my changes.
• My changes require further changes to the documentation.
• I updated the documentation where necessary.