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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.versions;
import com.google.common.collect.ImmutableMap;
import com.yahoo.component.Version;
import com.yahoo.config.provision.CloudName;
import com.yahoo.config.provision.HostName;
import com.yahoo.config.provision.zone.ZoneApi;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.application.SystemApplication;
import com.yahoo.vespa.hosted.controller.maintenance.OsUpgrader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
/**
* Information about OS versions in this system.
*
* @author mpolden
*/
public class OsVersionStatus {
public static final OsVersionStatus empty = new OsVersionStatus(ImmutableMap.of());
private final Map<OsVersion, NodeVersions> versions;
/** Public for serialization purpose only. Use {@link OsVersionStatus#compute(Controller)} for an up-to-date status */
public OsVersionStatus(ImmutableMap<OsVersion, NodeVersions> versions) {
this.versions = ImmutableMap.copyOf(Objects.requireNonNull(versions, "versions must be non-null"));
}
/** All known OS versions and their nodes */
public Map<OsVersion, NodeVersions> versions() {
return versions;
}
/** Returns nodes eligible for OS upgrades that exist in given cloud */
public List<NodeVersion> nodesIn(CloudName cloud) {
return versions.entrySet().stream()
.filter(entry -> entry.getKey().cloud().equals(cloud))
.flatMap(entry -> entry.getValue().asMap().values().stream())
.collect(Collectors.toUnmodifiableList());
}
/** Returns versions that exist in given cloud */
public Set<Version> versionsIn(CloudName cloud) {
return versions.keySet().stream()
.filter(osVersion -> osVersion.cloud().equals(cloud))
.map(OsVersion::version)
.collect(Collectors.toUnmodifiableSet());
}
/** Compute the current OS versions in this system. This is expensive and should be called infrequently */
public static OsVersionStatus compute(Controller controller) {
var osVersionStatus = controller.osVersionStatus();
var osVersions = new HashMap<OsVersion, List<NodeVersion>>();
var now = controller.clock().instant();
controller.osVersions().forEach(osVersion -> osVersions.put(osVersion, new ArrayList<>()));
for (var application : SystemApplication.all()) {
if (!application.isEligibleForOsUpgrades()) continue;
for (var zone : zonesToUpgrade(controller)) {
var targetOsVersion = controller.serviceRegistry().configServer().nodeRepository()
.targetVersionsOf(zone.getId())
.osVersion(application.nodeType())
.orElse(Version.emptyVersion);
controller.serviceRegistry().configServer().nodeRepository()
.list(zone.getId(), application.id()).stream()
.filter(node -> OsUpgrader.eligibleForUpgrade(node, application))
.map(node -> new NodeVersion(node.hostname(), zone.getId(), node.currentOsVersion(), targetOsVersion, now))
.forEach(nodeVersion -> {
var newNodeVersion = osVersionStatus.of(nodeVersion.hostname())
.map(nv -> nv.withCurrentVersion(nodeVersion.currentVersion(), now)
.withWantedVersion(nodeVersion.wantedVersion()))
.orElse(nodeVersion);
var version = new OsVersion(newNodeVersion.currentVersion(), zone.getCloudName());
osVersions.putIfAbsent(version, new ArrayList<>());
osVersions.get(version).add(newNodeVersion);
});
}
}
var newOsVersions = ImmutableMap.<OsVersion, NodeVersions>builder();
for (var osVersion : osVersions.entrySet()) {
var nodeVersions = ImmutableMap.<HostName, NodeVersion>builder();
for (var nodeVersion : osVersion.getValue()) {
nodeVersions.put(nodeVersion.hostname(), nodeVersion);
}
newOsVersions.put(osVersion.getKey(), new NodeVersions(nodeVersions.build()));
}
return new OsVersionStatus(newOsVersions.build());
}
/** Returns version of node identified by given host name */
private Optional<NodeVersion> of(HostName hostname) {
return versions.values().stream()
.map(nodeVersions -> nodeVersions.asMap().get(hostname))
.map(Optional::ofNullable)
.flatMap(Optional::stream)
.findFirst();
}
private static List<ZoneApi> zonesToUpgrade(Controller controller) {
return controller.zoneRegistry().osUpgradePolicies().stream()
.flatMap(upgradePolicy -> upgradePolicy.asList().stream())
.flatMap(Collection::stream)
.collect(Collectors.toUnmodifiableList());
}
}
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