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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.provisioning;
import com.google.inject.Inject;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.Capacity;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.Environment;
import com.yahoo.config.provision.HostFilter;
import com.yahoo.config.provision.HostSpec;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.config.provision.NodeType;
import com.yahoo.config.provision.ProvisionLogger;
import com.yahoo.config.provision.Provisioner;
import com.yahoo.config.provision.Zone;
import java.util.logging.Level;
import com.yahoo.transaction.Mutex;
import com.yahoo.transaction.NestedTransaction;
import com.yahoo.vespa.flags.FlagSource;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.NodeList;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import com.yahoo.vespa.hosted.provision.applications.Application;
import com.yahoo.vespa.hosted.provision.node.Allocation;
import com.yahoo.vespa.hosted.provision.node.filter.ApplicationFilter;
import com.yahoo.vespa.hosted.provision.node.filter.NodeHostFilter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Optional;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Implementation of the host provisioner API for hosted Vespa, using the node repository to allocate nodes.
* Does not allocate hosts for the routing application, see VespaModelFactory.createHostProvisioner
*
* @author bratseth
*/
public class NodeRepositoryProvisioner implements Provisioner {
private static final Logger log = Logger.getLogger(NodeRepositoryProvisioner.class.getName());
private static final int SPARE_CAPACITY_PROD = 0;
private static final int SPARE_CAPACITY_NONPROD = 0;
private final NodeRepository nodeRepository;
private final CapacityPolicies capacityPolicies;
private final Zone zone;
private final Preparer preparer;
private final Activator activator;
private final Optional<LoadBalancerProvisioner> loadBalancerProvisioner;
int getSpareCapacityProd() {
return SPARE_CAPACITY_PROD;
}
@Inject
public NodeRepositoryProvisioner(NodeRepository nodeRepository, Zone zone,
ProvisionServiceProvider provisionServiceProvider, FlagSource flagSource) {
this.nodeRepository = nodeRepository;
this.capacityPolicies = new CapacityPolicies(zone);
this.zone = zone;
this.loadBalancerProvisioner = provisionServiceProvider.getLoadBalancerService().map(lbService -> new LoadBalancerProvisioner(nodeRepository, lbService));
this.preparer = new Preparer(nodeRepository,
zone.environment() == Environment.prod ? SPARE_CAPACITY_PROD : SPARE_CAPACITY_NONPROD,
provisionServiceProvider.getHostProvisioner(),
provisionServiceProvider.getHostResourcesCalculator(),
flagSource,
loadBalancerProvisioner);
this.activator = new Activator(nodeRepository, loadBalancerProvisioner);
}
/**
* Returns a list of nodes in the prepared or active state, matching the given constraints.
* The nodes are ordered by increasing index number.
*/
@Override
public List<HostSpec> prepare(ApplicationId application, ClusterSpec cluster, Capacity requested,
ProvisionLogger logger) {
log.log(zone.system().isCd() ? Level.INFO : LogLevel.DEBUG,
() -> "Received deploy prepare request for " + requested +
" for application " + application + ", cluster " + cluster);
if (cluster.group().isPresent()) throw new IllegalArgumentException("Node requests cannot specify a group");
if ( ! hasQuota(application, requested.maxResources().nodes()))
throw new IllegalArgumentException(requested + " requested for " + cluster +
". Max value exceeds your quota. Resolve this at https://cloud.vespa.ai/quota");
int groups;
NodeResources resources;
NodeSpec nodeSpec;
if ( requested.type() == NodeType.tenant) {
ClusterResources target = decideTargetResources(application, cluster.id(), requested);
int nodeCount = capacityPolicies.decideSize(target.nodes(), requested, cluster, application);
resources = capacityPolicies.decideNodeResources(target.nodeResources(), requested, cluster);
boolean exclusive = capacityPolicies.decideExclusivity(cluster.isExclusive());
groups = Math.min(target.groups(), nodeCount); // cannot have more groups than nodes
nodeSpec = NodeSpec.from(nodeCount, resources, exclusive, requested.canFail());
logIfDownscaled(target.nodes(), nodeCount, cluster, logger);
}
else {
groups = 1; // type request with multiple groups is not supported
resources = requested.minResources().nodeResources();
nodeSpec = NodeSpec.from(requested.type());
}
return asSortedHosts(preparer.prepare(application, cluster, nodeSpec, groups), resources);
}
@Override
public void activate(NestedTransaction transaction, ApplicationId application, Collection<HostSpec> hosts) {
validate(hosts);
activator.activate(application, hosts, transaction);
}
@Override
public void restart(ApplicationId application, HostFilter filter) {
nodeRepository.restart(ApplicationFilter.from(application, NodeHostFilter.from(filter)));
}
@Override
public void remove(NestedTransaction transaction, ApplicationId application) {
nodeRepository.deactivate(application, transaction);
loadBalancerProvisioner.ifPresent(lbProvisioner -> lbProvisioner.deactivate(application, transaction));
}
/**
* Returns the target cluster resources, a value between the min and max in the requested capacity,
* and updates the application store with the received min and max.
*/
private ClusterResources decideTargetResources(ApplicationId applicationId, ClusterSpec.Id clusterId, Capacity requested) {
try (Mutex lock = nodeRepository.lock(applicationId)) {
Application application = nodeRepository.applications().get(applicationId).orElse(new Application(applicationId));
application = application.withClusterLimits(clusterId, requested.minResources(), requested.maxResources());
nodeRepository.applications().put(application, lock);
return application.clusters().get(clusterId).targetResources()
.orElseGet(() -> currentResources(applicationId, clusterId, requested)
.orElse(requested.minResources()));
}
}
/** Returns the current resources of this cluster, if it's already deployed and inside the requested limits */
private Optional<ClusterResources> currentResources(ApplicationId applicationId,
ClusterSpec.Id clusterId,
Capacity requested) {
List<Node> nodes = NodeList.copyOf(nodeRepository.getNodes(applicationId, Node.State.active))
.cluster(clusterId)
.not().retired()
.not().removable()
.asList();
if (nodes.isEmpty()) return Optional.empty();
long groups = nodes.stream().map(node -> node.allocation().get().membership().cluster().group()).distinct().count();
// To allow non-numeric settings to be updated without resetting to the min target, we need to use
// the non-numeric settings of the current min limit with the current numeric settings
NodeResources nodeResources = nodes.get(0).allocation().get().requestedResources()
.with(requested.minResources().nodeResources().diskSpeed())
.with(requested.minResources().nodeResources().storageType());
var currentResources = new ClusterResources(nodes.size(), (int)groups, nodeResources);
if ( ! currentResources.isWithin(requested.minResources(), requested.maxResources())) return Optional.empty();
return Optional.of(currentResources);
}
private void logIfDownscaled(int targetNodes, int actualNodes, ClusterSpec cluster, ProvisionLogger logger) {
if (zone.environment().isManuallyDeployed() && actualNodes < targetNodes)
logger.log(Level.INFO, "Requested " + targetNodes + " nodes for " + cluster +
", downscaling to " + actualNodes + " nodes in " + zone.environment());
}
private boolean hasQuota(ApplicationId application, int requestedNodes) {
if ( ! this.zone.system().isPublic()) return true; // no quota management
if (application.tenant().value().hashCode() == 3857) return requestedNodes <= 60;
if (application.tenant().value().hashCode() == -1271827001) return requestedNodes <= 75;
return requestedNodes <= 5;
}
private List<HostSpec> asSortedHosts(List<Node> nodes, NodeResources requestedResources) {
nodes.sort(Comparator.comparingInt(node -> node.allocation().get().membership().index()));
List<HostSpec> hosts = new ArrayList<>(nodes.size());
for (Node node : nodes) {
log.log(LogLevel.DEBUG, () -> "Prepared node " + node.hostname() + " - " + node.flavor());
Allocation nodeAllocation = node.allocation().orElseThrow(IllegalStateException::new);
hosts.add(new HostSpec(node.hostname(),
List.of(),
Optional.of(node.flavor()),
Optional.of(nodeAllocation.membership()),
node.status().vespaVersion(),
nodeAllocation.networkPorts(),
requestedResources == NodeResources.unspecified ? Optional.empty() : Optional.of(requestedResources),
node.status().dockerImage()));
if (nodeAllocation.networkPorts().isPresent()) {
log.log(LogLevel.DEBUG, () -> "Prepared node " + node.hostname() + " has port allocations");
}
}
return hosts;
}
private void validate(Collection<HostSpec> hosts) {
for (HostSpec host : hosts) {
if (host.membership().isEmpty())
throw new IllegalArgumentException("Hosts must be assigned a cluster when activating, but got " + host);
if (host.membership().get().cluster().group().isEmpty())
throw new IllegalArgumentException("Hosts must be assigned a group when activating, but got " + host);
}
}
}
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