Package org.jdrupes.vmoperator.manager

Class Controller

java.lang.Object

org.jgrapes.core.internal.ComponentVertex

org.jgrapes.core.Component

org.jdrupes.vmoperator.manager.Controller

All Implemented Interfaces:

Iterable<ComponentType>, Channel, ComponentType, Eligible, Manager

public class Controller
extends Component

Implements a controller as defined in the Operator Whitepaper.

The implementation splits the controller in two components. The VmMonitor and the Reconciler. The former watches the VM definitions (CRs) and generates VmDefChanged events when they change. The latter handles the changes and reconciles the resources in the cluster.

The controller itself supports a single configuration property:

"/Manager":
  "/Controller":
    namespace: vmop-dev

This may only be set when running the Manager (and thus the Controller) outside a container during development.

Nested Class Summary

Nested classes/interfaces inherited from interface org.jgrapes.core.Channel

Channel.Default

Field Summary

Fields inherited from class org.jgrapes.core.Component

logger

Fields inherited from interface org.jgrapes.core.Channel

BROADCAST, SELF

Constructor Summary

Constructors

Constructor	Description
Controller(Channel componentChannel)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
void	onConfigurationUpdate(ConfigurationUpdate event)	Configure the component.
void	onHandlingError(HandlingError event)	Special handling of ApiException thrown by handlers.
void	onModifyVm(ModifyVm event, VmChannel channel)	On modify vm.
void	onStart(Start event)	Handle the start event.

Methods inherited from class org.jgrapes.core.Component

channel, component, defaultCriterion, isEligibleFor, setName

Methods inherited from class org.jgrapes.core.internal.ComponentVertex

activeEventPipeline, addHandler, attach, channelReplacements, children, componentPath, componentVertex, detach, fire, initComponentsHandlers, iterator, name, newEventPipeline, newEventPipeline, parent, registerAsGenerator, root, toString, unregisterAsGenerator

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface org.jgrapes.core.Manager

stream

Constructor Details

Controller

public Controller(Channel componentChannel)

Creates a new instance.

Method Details

onHandlingError

@Handler(channels=org.jgrapes.core.Channel.class)
public void onHandlingError(HandlingError event)

Special handling of ApiException thrown by handlers.

Parameters:

event - the event

onConfigurationUpdate

@Handler
public void onConfigurationUpdate(ConfigurationUpdate event)

Configure the component.

Parameters:

event - the event

onStart

@Handler(priority=100)
public void onStart(Start event)
             throws IOException,
io.kubernetes.client.openapi.ApiException

Handle the start event.

Has higher priority because it configures the default Kubernetes client.

Parameters:

event - the event

Throws:

IOException

io.kubernetes.client.openapi.ApiException

onModifyVm

@Handler
public void onModifyVm(ModifyVm event,
 VmChannel channel)
                throws io.kubernetes.client.openapi.ApiException,
IOException

On modify vm.

Parameters:

event - the event

Throws:

io.kubernetes.client.openapi.ApiException - the api exception

IOException - Signals that an I/O exception has occurred.