Resource Management

/**
 * Service factory interface for Mesos components
 * Provides lifecycle management for all Mesos integration services
 */
public interface MesosServices extends AutoCloseable {
    /**
     * Create a worker store for persistent TaskManager state
     * @param configuration - Configuration for store implementation
     * @return MesosWorkerStore instance (standalone or ZooKeeper-based)
     * @throws Exception if the worker store could not be created
     */
    MesosWorkerStore createMesosWorkerStore(Configuration configuration) throws Exception;
    
    /**
     * Create factory for Mesos resource manager actors
     * @return Actor factory for resource management
     */
    MesosResourceManagerActorFactory createMesosResourceManagerActorFactory();
    
    /**
     * Get artifact server for distributing job files to tasks
     * @return Artifact server instance
     */
    MesosArtifactServer getArtifactServer();
    
    /**
     * Create Mesos scheduler driver for framework communication
     * @param mesosConfig - Mesos-specific configuration
     * @param scheduler - Scheduler implementation
     * @param implicitAcknowledgements - Whether to configure driver for implicit acknowledgements
     * @return Configured SchedulerDriver instance
     */
    SchedulerDriver createMesosSchedulerDriver(MesosConfiguration mesosConfig,
                                               Scheduler scheduler,
                                               boolean implicitAcknowledgements);
    
    /**
     * Close all services and cleanup resources
     * @param cleanup - Whether to perform cleanup operations
     * @throws Exception if the closing operation failed
     */
    void close(boolean cleanup) throws Exception;
}

/**
 * Utilities for creating MesosServices instances
 * Handles selection between standalone and ZooKeeper-based implementations
 */
public class MesosServicesUtils {
    /**
     * Create MesosServices instance based on HA configuration
     * @param config - Flink configuration containing HA settings
     * @param hostname - Hostname for service binding
     * @return Appropriate MesosServices implementation
     */
    public static MesosServices createMesosServices(Configuration config, String hostname);
}

import org.apache.flink.configuration.Configuration;
import org.apache.flink.mesos.runtime.clusterframework.services.MesosServices;
import org.apache.flink.mesos.runtime.clusterframework.services.MesosServicesUtils;

// Create services based on configuration
Configuration config = new Configuration();
config.setString("high-availability", "zookeeper");
config.setString("high-availability.zookeeper.quorum", "zk1:2181,zk2:2181");

MesosServices services = MesosServicesUtils.createMesosServices(config, "master-host");

// Use services
MesosWorkerStore workerStore = services.createMesosWorkerStore(config);
MesosArtifactServer artifactServer = services.getArtifactServer();

// Cleanup when done
services.close(true);

/**
 * Factory for creating Mesos resource managers
 * Integrates with Flink's ActiveResourceManager framework
 */
public class MesosResourceManagerFactory extends ActiveResourceManagerFactory<RegisteredMesosWorkerNode> {
    /**
     * Create Mesos resource manager factory
     * @param mesosServices - Mesos services instance
     * @param mesosConfiguration - Mesos scheduler configuration
     */
    public MesosResourceManagerFactory(MesosServices mesosServices, 
                                       MesosConfiguration mesosConfiguration);
}

/**
 * Handles launching of TaskManager processes in Mesos containers
 * Converts Flink ContainerSpecification to Mesos TaskInfo
 */
public class LaunchableMesosWorker implements LaunchableTask {
    /**
     * Get unique task identifier
     * @return Mesos task ID for this worker
     */
    public Protos.TaskID taskID();
    
    /**
     * Get Fenzo task requirements for resource scheduling
     * @return TaskRequest with resource and constraint requirements
     */
    public TaskRequest taskRequest();
    
    /**
     * Launch the TaskManager task on the specified Mesos slave
     * @param slaveId - Target Mesos slave for task execution
     * @param allocation - Allocated resources for the task
     * @return TaskInfo for Mesos task launch
     */
    public Protos.TaskInfo launch(Protos.SlaveID slaveId, MesosResourceAllocation allocation);
    
    /**
     * Extract port configuration keys from Flink configuration
     * @param config - Flink configuration
     * @return Set of port keys requiring dynamic assignment
     */
    public static Set<String> extractPortKeys(Configuration config);
    
    /**
     * Configure artifact server for task artifact distribution
     * @param artifactServer - Server instance for artifact hosting  
     * @param taskManagerParameters - TaskManager configuration parameters
     * @param config - Flink configuration
     * @param logger - Logger for operation reporting
     */
    public static void configureArtifactServer(MesosArtifactServer artifactServer,
                                               MesosTaskManagerParameters taskManagerParameters,
                                               Configuration config,
                                               Logger logger);
}

import org.apache.flink.mesos.runtime.clusterframework.LaunchableMesosWorker;
import org.apache.flink.mesos.util.MesosResourceAllocation;

// Create worker with resource requirements
LaunchableMesosWorker worker = new LaunchableMesosWorker(/* constructor params */);

// Get resource requirements for scheduling
TaskRequest taskRequest = worker.taskRequest();
double cpuCores = taskRequest.getCPUs();
double memoryMB = taskRequest.getMemory();

// Launch on allocated resources
Protos.SlaveID slaveId = Protos.SlaveID.newBuilder().setValue("slave-001").build();
MesosResourceAllocation allocation = new MesosResourceAllocation(/* resources */);
Protos.TaskInfo taskInfo = worker.launch(slaveId, allocation);

/**
 * Factory for creating Mesos worker resource specifications
 * Handles resource requirement calculation and specification
 */
public class MesosWorkerResourceSpecFactory implements WorkerResourceSpecFactory<RegisteredMesosWorkerNode> {
    /**
     * Create worker resource specification from TaskManager parameters
     * @param taskManagerParameters - Resource requirements
     * @return Worker resource specification
     */
    public RegisteredMesosWorkerNode createWorkerResourceSpec(MesosTaskManagerParameters taskManagerParameters);
}

/**
 * Registered Mesos worker node with resource information
 * Represents a TaskManager instance registered with the resource manager
 */
public class RegisteredMesosWorkerNode extends WorkerResourceSpec {
    /**
     * Get worker resource specification
     * @return Resource requirements and allocation details
     */
    public WorkerResourceSpec getResourceSpec();
    
    /**
     * Get Mesos task ID for this worker
     * @return Unique task identifier
     */
    public Protos.TaskID getTaskId();
}

/**
 * Actions interface for Mesos resource manager operations
 * Defines cluster management operations available to the resource manager
 */
public interface MesosResourceManagerActions {
    /**
     * Request allocation of new TaskManager resources
     * @param resourceProfile - Required resource profile
     * @param timeout - Timeout for resource allocation
     */
    void requestNewWorker(ResourceProfile resourceProfile, Duration timeout);
    
    /**
     * Release allocated TaskManager resources
     * @param workerId - Identifier of worker to release
     */
    void releaseWorker(ResourceID workerId);
    
    /**
     * Get current cluster resource status
     * @return Current allocation and utilization information
     */
    ClusterResourceStatus getClusterResourceStatus();
}

// Configure auto-scaling behavior
Configuration config = new Configuration();
config.setString("resourcemanager.rpc.port", "0");
config.setString("resourcemanager.rpc.bind-port", "0");

// Enable reactive scaling
config.setBoolean("scheduler-mode.reactive", true);
config.setString("execution.checkpointing.mode", "EXACTLY_ONCE");

// Resource constraints
config.setDouble("mesos.resourcemanager.tasks.cpus", 2.0);
config.setString("taskmanager.memory.process.size", "2g");

Configuration config = new Configuration();

// Framework role for reservations
config.setString(MesosOptions.RESOURCEMANAGER_FRAMEWORK_ROLE, "production");

// Resource constraints with reservations
config.setString("mesos.constraints.hard.attribute", "rack:LIKE:rack-1");
config.setString("mesos.resourcemanager.tasks.cpus", "2.0");
config.setString("mesos.resourcemanager.tasks.mem", "2048");

Configuration config = new Configuration();

// Docker container configuration
config.setString("mesos.resourcemanager.tasks.container.type", "docker");
config.setString("mesos.resourcemanager.tasks.container.docker.image", "flink:1.13.6-scala_2.11");
config.setString("mesos.resourcemanager.tasks.container.docker.network", "HOST");

// Volume mounts
config.setString("mesos.resourcemanager.tasks.container.volumes", 
    "/host-data:/container-data:RO,/host-logs:/container-logs:RW");

// Environment variables
config.setString("containerized.master.env.FLINK_CONF_DIR", "/opt/flink/conf");

/**
 * Resource allocation details for Mesos tasks
 */
public class MesosResourceAllocation {
    public double cpus();
    public double memoryMB();
    public double diskMB();
    public double networkMbps();
    public List<Protos.Resource> mesosResources();
}

/**
 * Cluster resource status information
 */
public class ClusterResourceStatus {
    public int totalTaskManagers();
    public int availableTaskSlots();
    public int allocatedTaskSlots();
    public ResourceProfile totalResources();
    public ResourceProfile availableResources();
}

/**
 * Task launch context and parameters
 */
public class TaskLaunchContext {
    public ContainerSpecification containerSpec();
    public MesosTaskManagerParameters taskManagerParameters();
    public Map<String, String> environmentVariables();
    public List<String> commandLineArguments();
}