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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.orchestrator.policy;
import com.yahoo.vespa.applicationmodel.ApplicationInstance;
import com.yahoo.vespa.applicationmodel.HostName;
import com.yahoo.vespa.flags.BooleanFlag;
import com.yahoo.vespa.flags.FetchVector;
import com.yahoo.vespa.flags.FlagSource;
import com.yahoo.vespa.flags.Flags;
import com.yahoo.vespa.orchestrator.OrchestratorContext;
import com.yahoo.vespa.orchestrator.controller.ClusterControllerClientFactory;
import com.yahoo.vespa.orchestrator.controller.ClusterControllerNodeState;
import com.yahoo.vespa.orchestrator.model.ApplicationApi;
import com.yahoo.vespa.orchestrator.model.ApplicationApiFactory;
import com.yahoo.vespa.orchestrator.model.ClusterApi;
import com.yahoo.vespa.orchestrator.model.NodeGroup;
import com.yahoo.vespa.orchestrator.model.StorageNode;
import com.yahoo.vespa.orchestrator.status.ApplicationInstanceStatus;
import com.yahoo.vespa.orchestrator.status.HostStatus;
import com.yahoo.vespa.orchestrator.status.ApplicationLock;
/**
* @author oyving
*/
public class HostedVespaPolicy implements Policy {
public static final String APPLICATION_SUSPENDED_CONSTRAINT = "application-suspended";
public static final String ENOUGH_SERVICES_UP_CONSTRAINT = "enough-services-up";
public static final String UNKNOWN_SERVICE_STATUS = "unknown-service-status";
public static final String SET_NODE_STATE_CONSTRAINT = "controller-set-node-state";
public static final String CLUSTER_CONTROLLER_AVAILABLE_CONSTRAINT = "controller-available";
public static final String DEADLINE_CONSTRAINT = "deadline";
private final HostedVespaClusterPolicy clusterPolicy;
private final ClusterControllerClientFactory clusterControllerClientFactory;
private final ApplicationApiFactory applicationApiFactory;
public HostedVespaPolicy(HostedVespaClusterPolicy clusterPolicy,
ClusterControllerClientFactory clusterControllerClientFactory,
ApplicationApiFactory applicationApiFactory,
FlagSource flagSource) {
this.clusterPolicy = clusterPolicy;
this.clusterControllerClientFactory = clusterControllerClientFactory;
this.applicationApiFactory = applicationApiFactory;
}
@Override
public SuspensionReasons grantSuspensionRequest(OrchestratorContext context, ApplicationApi application)
throws HostStateChangeDeniedException {
var suspensionReasons = new SuspensionReasons();
// Apply per-cluster policy
for (ClusterApi cluster : application.getClusters()) {
suspensionReasons.mergeWith(clusterPolicy.verifyGroupGoingDownIsFine(cluster));
}
// Ask Cluster Controller to set storage nodes in maintenance, unless the node is already allowed
// to be down (or permanently down) in case they are guaranteed to be in maintenance already.
for (StorageNode storageNode : application.getNoRemarksStorageNodesInGroupInClusterOrder()) {
storageNode.setStorageNodeState(context, ClusterControllerNodeState.MAINTENANCE);
}
// Ensure all nodes in the group are marked as allowed to be down
for (HostName hostName : application.getNodesInGroupWithStatus(HostStatus.NO_REMARKS)) {
application.setHostState(context, hostName, HostStatus.ALLOWED_TO_BE_DOWN);
}
return suspensionReasons;
}
@Override
public void releaseSuspensionGrant(OrchestratorContext context, ApplicationApi application)
throws HostStateChangeDeniedException {
// Always defer to Cluster Controller whether it's OK to resume storage node
for (StorageNode storageNode : application.getSuspendedStorageNodesInGroupInReverseClusterOrder()) {
storageNode.setStorageNodeState(context, ClusterControllerNodeState.UP);
}
// In particular, we're not modifying the state of PERMANENTLY_DOWN nodes.
for (HostName hostName : application.getNodesInGroupWithStatus(HostStatus.ALLOWED_TO_BE_DOWN)) {
application.setHostState(context, hostName, HostStatus.NO_REMARKS);
}
}
@Override
public void acquirePermissionToRemove(OrchestratorContext context, ApplicationApi applicationApi)
throws HostStateChangeDeniedException {
ApplicationInstanceStatus applicationStatus = applicationApi.getApplicationStatus();
if (applicationStatus == ApplicationInstanceStatus.ALLOWED_TO_BE_DOWN) {
throw new HostStateChangeDeniedException(
applicationApi.getNodeGroup(),
HostedVespaPolicy.APPLICATION_SUSPENDED_CONSTRAINT,
"Unable to test availability constraints as the application " +
applicationApi.applicationId() + " is allowed to be down");
}
// Apply per-cluster policy
for (ClusterApi cluster : applicationApi.getClusters()) {
clusterPolicy.verifyGroupGoingDownPermanentlyIsFine(cluster);
}
// Get permission from the Cluster Controller to remove the content nodes.
for (StorageNode storageNode : applicationApi.getStorageNodesInGroupInClusterOrder()) {
// Consider changing the semantics of setting storage node state to DOWN in cluster controller, to avoid 2 calls.
storageNode.setStorageNodeState(context.createSubcontextForSingleAppOp(true), ClusterControllerNodeState.DOWN);
storageNode.forceDistributorState(context, ClusterControllerNodeState.DOWN);
}
// Ensure all nodes in the group are marked as permanently down
for (HostName hostName : applicationApi.getNodesInGroupWith(status -> status != HostStatus.PERMANENTLY_DOWN)) {
applicationApi.setHostState(context, hostName, HostStatus.PERMANENTLY_DOWN);
}
}
// TODO: Remove later - currently used for backward compatibility testing
@Override
public void releaseSuspensionGrant(
OrchestratorContext context,
ApplicationInstance applicationInstance,
HostName hostName,
ApplicationLock lock) throws HostStateChangeDeniedException {
NodeGroup nodeGroup = new NodeGroup(applicationInstance, hostName);
ApplicationApi applicationApi = applicationApiFactory.create(nodeGroup, lock, clusterControllerClientFactory);
releaseSuspensionGrant(context, applicationApi);
}
}
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