From a0c0657dc867db61951edff24ddc944bed132ac0 Mon Sep 17 00:00:00 2001 From: Fabian Mastenbroek Date: Fri, 5 Mar 2021 14:44:30 +0100 Subject: compute: Make VirtProvisoningService responsible for Server lifecycle This change refactors the OpenDC Compute module so that the VirtProvisioningService is now responsible for managing the lifecycle of Server objects as opposed to the VirtDriver and BareMetalDriver previously. --- .../kotlin/org/opendc/compute/core/virt/Host.kt | 94 ++++++++++++++++++++++ .../org/opendc/compute/core/virt/HostEvent.kt | 75 +++++++++++++++++ .../org/opendc/compute/core/virt/HostListener.kt | 41 ++++++++++ .../org/opendc/compute/core/virt/HostState.kt | 38 +++++++++ .../org/opendc/compute/core/virt/Hypervisor.kt | 56 ------------- .../opendc/compute/core/virt/HypervisorEvent.kt | 76 ----------------- .../virt/InsufficientMemoryOnServerException.kt | 3 + .../driver/InsufficientMemoryOnServerException.kt | 3 - .../opendc/compute/core/virt/driver/VirtDriver.kt | 63 --------------- .../core/virt/service/VirtProvisioningService.kt | 4 +- 10 files changed, 253 insertions(+), 200 deletions(-) create mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/Host.kt create mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostEvent.kt create mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostListener.kt create mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostState.kt delete mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/Hypervisor.kt delete mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HypervisorEvent.kt create mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/InsufficientMemoryOnServerException.kt delete mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/driver/InsufficientMemoryOnServerException.kt delete mode 100644 simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/driver/VirtDriver.kt (limited to 'simulator/opendc-compute/opendc-compute-core/src') diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/Host.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/Host.kt new file mode 100644 index 00000000..60a31b69 --- /dev/null +++ b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/Host.kt @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2021 AtLarge Research + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +package org.opendc.compute.core.virt + +import kotlinx.coroutines.flow.Flow +import org.opendc.compute.core.Server +import java.util.* + +/** + * Base interface for representing compute resources that host virtualized [Server] instances. + */ +public interface Host { + /** + * A unique identifier representing the host. + */ + public val uid: UUID + + /** + * The state of the host. + */ + public val state: HostState + + /** + * The events emitted by the driver. + */ + public val events: Flow + + /** + * Determine whether the specified [instance][server] can still fit on this host. + */ + public fun canFit(server: Server): Boolean + + /** + * Register the specified [instance][server] on the host. + * + * Once the method returns, the instance should be running if [start] is true or else the instance should be + * stopped. + */ + public suspend fun spawn(server: Server, start: Boolean = true) + + /** + * Determine whether the specified [instance][server] exists on the host. + */ + public operator fun contains(server: Server): Boolean + + /** + * Stat the server [instance][server] if it is currently not running on this host. + * + * @throws IllegalArgumentException if the server is not present on the host. + */ + public suspend fun start(server: Server) + + /** + * Stop the server [instance][server] if it is currently running on this host. + * + * @throws IllegalArgumentException if the server is not present on the host. + */ + public suspend fun stop(server: Server) + + /** + * Terminate the specified [instance][server] on this host and cleanup all resources associated with it. + */ + public suspend fun terminate(server: Server) + + /** + * Add a [HostListener] to this host. + */ + public fun addListener(listener: HostListener) + + /** + * Remove a [HostListener] from this host. + */ + public fun removeListener(listener: HostListener) +} diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostEvent.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostEvent.kt new file mode 100644 index 00000000..a07523e8 --- /dev/null +++ b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostEvent.kt @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2020 AtLarge Research + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +package org.opendc.compute.core.virt + +import org.opendc.compute.core.metal.Node + +/** + * An event that is emitted by a [Host]. + */ +public sealed class HostEvent { + /** + * The driver that emitted the event. + */ + public abstract val driver: Host + + /** + * This event is emitted when the number of active servers on the server managed by this driver is updated. + * + * @property driver The driver that emitted the event. + * @property numberOfActiveServers The number of active servers. + * @property availableMemory The available memory, in MB. + */ + public data class VmsUpdated( + override val driver: Host, + public val numberOfActiveServers: Int, + public val availableMemory: Long + ) : HostEvent() + + /** + * This event is emitted when a slice is finished. + * + * @property driver The driver that emitted the event. + * @property requestedBurst The total requested CPU time (can be above capacity). + * @property grantedBurst The actual total granted capacity, which might be lower than the requested burst due to + * the hypervisor being interrupted during a slice. + * @property overcommissionedBurst The CPU time that the hypervisor could not grant to the virtual machine since + * it did not have the capacity. + * @property interferedBurst The sum of CPU time that virtual machines could not utilize due to performance + * interference. + * @property cpuUsage CPU use in megahertz. + * @property cpuDemand CPU demand in megahertz. + * @property numberOfDeployedImages The number of images deployed on this hypervisor. + */ + public data class SliceFinished( + override val driver: Host, + public val requestedBurst: Long, + public val grantedBurst: Long, + public val overcommissionedBurst: Long, + public val interferedBurst: Long, + public val cpuUsage: Double, + public val cpuDemand: Double, + public val numberOfDeployedImages: Int, + public val host: Node + ) : HostEvent() +} diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostListener.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostListener.kt new file mode 100644 index 00000000..b14d9bb5 --- /dev/null +++ b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostListener.kt @@ -0,0 +1,41 @@ +/* + * Copyright (c) 2021 AtLarge Research + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +package org.opendc.compute.core.virt + +import org.opendc.compute.core.Server +import org.opendc.compute.core.ServerState + +/** + * Listener interface for events originating from a [Host]. + */ +public interface HostListener { + /** + * This method is invoked when the state of an [instance][server] on [host] changes. + */ + public fun onStateChange(host: Host, server: Server, newState: ServerState) {} + + /** + * This method is invoked when the state of a [Host] has changed. + */ + public fun onStateChange(host: Host, newState: HostState) {} +} diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostState.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostState.kt new file mode 100644 index 00000000..7f87f5f7 --- /dev/null +++ b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HostState.kt @@ -0,0 +1,38 @@ +/* + * Copyright (c) 2021 AtLarge Research + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +package org.opendc.compute.core.virt + +/** + * The state of a host. + */ +public enum class HostState { + /** + * The host is up. + */ + UP, + + /** + * The host is down. + */ + DOWN +} diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/Hypervisor.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/Hypervisor.kt deleted file mode 100644 index 1ae52baa..00000000 --- a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/Hypervisor.kt +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Copyright (c) 2020 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.compute.core.virt - -import kotlinx.coroutines.flow.Flow -import org.opendc.core.Identity -import java.util.UUID - -/** - * A hypervisor (or virtual machine monitor) is software or firmware that virtualizes the host compute environment - * into several virtual guest machines. - */ -public class Hypervisor( - /** - * The unique identifier of the hypervisor. - */ - override val uid: UUID, - - /** - * The optional name of the hypervisor. - */ - override val name: String, - - /** - * Metadata of the hypervisor. - */ - public val metadata: Map, - - /** - * The events that are emitted by the hypervisor. - */ - public val events: Flow -) : Identity { - override fun hashCode(): Int = uid.hashCode() - override fun equals(other: Any?): Boolean = other is Hypervisor && uid == other.uid -} diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HypervisorEvent.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HypervisorEvent.kt deleted file mode 100644 index d1c8d790..00000000 --- a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/HypervisorEvent.kt +++ /dev/null @@ -1,76 +0,0 @@ -/* - * Copyright (c) 2020 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.compute.core.virt - -import org.opendc.compute.core.metal.Node -import org.opendc.compute.core.virt.driver.VirtDriver - -/** - * An event that is emitted by a [VirtDriver]. - */ -public sealed class HypervisorEvent { - /** - * The driver that emitted the event. - */ - public abstract val driver: VirtDriver - - /** - * This event is emitted when the number of active servers on the server managed by this driver is updated. - * - * @property driver The driver that emitted the event. - * @property numberOfActiveServers The number of active servers. - * @property availableMemory The available memory, in MB. - */ - public data class VmsUpdated( - override val driver: VirtDriver, - public val numberOfActiveServers: Int, - public val availableMemory: Long - ) : HypervisorEvent() - - /** - * This event is emitted when a slice is finished. - * - * @property driver The driver that emitted the event. - * @property requestedBurst The total requested CPU time (can be above capacity). - * @property grantedBurst The actual total granted capacity, which might be lower than the requested burst due to - * the hypervisor being interrupted during a slice. - * @property overcommissionedBurst The CPU time that the hypervisor could not grant to the virtual machine since - * it did not have the capacity. - * @property interferedBurst The sum of CPU time that virtual machines could not utilize due to performance - * interference. - * @property cpuUsage CPU use in megahertz. - * @property cpuDemand CPU demand in megahertz. - * @property numberOfDeployedImages The number of images deployed on this hypervisor. - */ - public data class SliceFinished( - override val driver: VirtDriver, - public val requestedBurst: Long, - public val grantedBurst: Long, - public val overcommissionedBurst: Long, - public val interferedBurst: Long, - public val cpuUsage: Double, - public val cpuDemand: Double, - public val numberOfDeployedImages: Int, - public val host: Node - ) : HypervisorEvent() -} diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/InsufficientMemoryOnServerException.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/InsufficientMemoryOnServerException.kt new file mode 100644 index 00000000..0f7b5826 --- /dev/null +++ b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/InsufficientMemoryOnServerException.kt @@ -0,0 +1,3 @@ +package org.opendc.compute.core.virt + +public class InsufficientMemoryOnServerException : IllegalStateException("Insufficient memory left on server.") diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/driver/InsufficientMemoryOnServerException.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/driver/InsufficientMemoryOnServerException.kt deleted file mode 100644 index 6fe84ea6..00000000 --- a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/driver/InsufficientMemoryOnServerException.kt +++ /dev/null @@ -1,3 +0,0 @@ -package org.opendc.compute.core.virt.driver - -public class InsufficientMemoryOnServerException : IllegalStateException("Insufficient memory left on server.") diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/driver/VirtDriver.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/driver/VirtDriver.kt deleted file mode 100644 index 68cc7b50..00000000 --- a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/driver/VirtDriver.kt +++ /dev/null @@ -1,63 +0,0 @@ -/* - * Copyright (c) 2020 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.compute.core.virt.driver - -import kotlinx.coroutines.flow.Flow -import org.opendc.compute.core.Flavor -import org.opendc.compute.core.Server -import org.opendc.compute.core.image.Image -import org.opendc.compute.core.virt.HypervisorEvent -import org.opendc.core.services.AbstractServiceKey -import java.util.UUID - -/** - * A driver interface for a hypervisor running on some host server and communicating with the central compute service to - * provide virtualization for that particular resource. - */ -public interface VirtDriver { - /** - * The events emitted by the driver. - */ - public val events: Flow - - /** - * Determine whether the specified [flavor] can still fit on this driver. - */ - public fun canFit(flavor: Flavor): Boolean - - /** - * Spawn the given [Image] on the compute resource of this driver. - * - * @param name The name of the server to spawn. - * @param image The image to deploy. - * @param flavor The flavor of the server which this driver is controlling. - * @return The virtual server spawned by this method. - */ - public suspend fun spawn( - name: String, - image: Image, - flavor: Flavor - ): Server - - public companion object Key : AbstractServiceKey(UUID.randomUUID(), "virtual-driver") -} diff --git a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/service/VirtProvisioningService.kt b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/service/VirtProvisioningService.kt index b967044c..8da849af 100644 --- a/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/service/VirtProvisioningService.kt +++ b/simulator/opendc-compute/opendc-compute-core/src/main/kotlin/org/opendc/compute/core/virt/service/VirtProvisioningService.kt @@ -26,7 +26,7 @@ import kotlinx.coroutines.flow.Flow import org.opendc.compute.core.Flavor import org.opendc.compute.core.Server import org.opendc.compute.core.image.Image -import org.opendc.compute.core.virt.driver.VirtDriver +import org.opendc.compute.core.virt.Host /** * A service for VM provisioning on a cloud. @@ -40,7 +40,7 @@ public interface VirtProvisioningService { /** * Obtain the active hypervisors for this provisioner. */ - public suspend fun drivers(): Set + public suspend fun drivers(): Set /** * The number of hosts available in the system. -- cgit v1.2.3