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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.ClusterSpec;
import com.yahoo.config.provision.Environment;
import com.yahoo.config.provision.Flavor;
import com.yahoo.config.provision.HostFilter;
import com.yahoo.config.provision.HostSpec;
import com.yahoo.config.provision.NodeFlavors;
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 com.yahoo.log.LogLevel;
import com.yahoo.transaction.NestedTransaction;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import com.yahoo.vespa.hosted.provision.node.filter.ApplicationFilter;
import com.yahoo.vespa.hosted.provision.node.filter.NodeHostFilter;
import java.time.Clock;
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 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;
int getSpareCapacityProd() {
return SPARE_CAPACITY_PROD;
}
@Inject
public NodeRepositoryProvisioner(NodeRepository nodeRepository, NodeFlavors flavors, Zone zone) {
this.nodeRepository = nodeRepository;
this.capacityPolicies = new CapacityPolicies(zone, flavors);
this.zone = zone;
this.preparer = new Preparer(nodeRepository, zone.environment().equals(Environment.prod)
? SPARE_CAPACITY_PROD
: SPARE_CAPACITY_NONPROD);
this.activator = new Activator(nodeRepository);
}
/**
* 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 requestedCapacity,
int wantedGroups, ProvisionLogger logger) {
if (cluster.group().isPresent()) throw new IllegalArgumentException("Node requests cannot specify a group");
if (requestedCapacity.nodeCount() > 0 && requestedCapacity.nodeCount() % wantedGroups != 0)
throw new IllegalArgumentException("Requested " + requestedCapacity.nodeCount() + " nodes in " + wantedGroups + " groups, " +
"which doesn't allow the nodes to be divided evenly into groups");
log.log(LogLevel.DEBUG, () -> "Received deploy prepare request for " + requestedCapacity + " in " +
wantedGroups + " groups for application " + application + ", cluster " + cluster);
int effectiveGroups;
NodeSpec requestedNodes;
if ( requestedCapacity.type() == NodeType.tenant) {
int nodeCount = capacityPolicies.decideSize(requestedCapacity);
if (zone.environment().isManuallyDeployed() && nodeCount < requestedCapacity.nodeCount())
logger.log(Level.INFO, "Requested " + requestedCapacity.nodeCount() + " nodes for " + cluster +
", downscaling to " + nodeCount + " nodes in " + zone.environment());
Optional<String> defaultFlavorOverride = nodeRepository.getDefaultFlavorOverride(application);
Flavor flavor = capacityPolicies.decideFlavor(requestedCapacity, cluster, defaultFlavorOverride);
log.log(LogLevel.DEBUG, () -> "Decided flavor for requested tenant nodes: " + flavor);
boolean exclusive = capacityPolicies.decideExclusivity(cluster.isExclusive());
effectiveGroups = wantedGroups > nodeCount ? nodeCount : wantedGroups; // cannot have more groups than nodes
requestedNodes = NodeSpec.from(nodeCount, flavor, exclusive, requestedCapacity.canFail());
}
else {
requestedNodes = NodeSpec.from(requestedCapacity.type());
effectiveGroups = 1; // type request with multiple groups is not supported
}
return asSortedHosts(preparer.prepare(application, cluster, requestedNodes, effectiveGroups));
}
@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);
}
private List<HostSpec> asSortedHosts(List<Node> nodes) {
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());
hosts.add(new HostSpec(node.hostname(),
node.allocation().orElseThrow(IllegalStateException::new).membership(),
node.flavor(),
node.status().vespaVersion()));
}
return hosts;
}
private void validate(Collection<HostSpec> hosts) {
for (HostSpec host : hosts) {
if ( ! host.membership().isPresent())
throw new IllegalArgumentException("Hosts must be assigned a cluster when activating, but got " + host);
if ( ! host.membership().get().cluster().group().isPresent())
throw new IllegalArgumentException("Hosts must be assigned a group when activating, but got " + host);
}
}
}
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