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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.ArrayListMultimap;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ListMultimap;
import com.yahoo.component.Version;
import com.yahoo.config.provision.HostName;
import java.util.logging.Level;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.application.ApplicationList;
import com.yahoo.vespa.hosted.controller.application.SystemApplication;
import com.yahoo.vespa.hosted.controller.maintenance.SystemUpgrader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
/**
* Information about the current platform versions in use.
* The versions in use are the set of all versions running in current applications, versions
* of config servers in all zones, and the version of this controller itself.
*
* This is immutable.
*
* @author bratseth
* @author mpolden
*/
public class VersionStatus {
private static final Logger log = Logger.getLogger(VersionStatus.class.getName());
private final ImmutableList<VespaVersion> versions;
/** Create a version status. DO NOT USE: Public for testing and serialization only */
public VersionStatus(List<VespaVersion> versions) {
this.versions = ImmutableList.copyOf(versions);
}
/** Returns the current version of controllers in this system */
public Optional<VespaVersion> controllerVersion() {
return versions().stream().filter(VespaVersion::isControllerVersion).findFirst();
}
/**
* Returns the current Vespa version of the system controlled by this,
* or empty if we have not currently determined what the system version is in this status.
*/
public Optional<VespaVersion> systemVersion() {
return versions().stream().filter(VespaVersion::isSystemVersion).findFirst();
}
/** Returns whether the system is currently upgrading */
public boolean isUpgrading() {
return systemVersion().map(VespaVersion::versionNumber).orElse(Version.emptyVersion)
.isBefore(controllerVersion().map(VespaVersion::versionNumber)
.orElse(Version.emptyVersion));
}
/**
* Lists all currently active Vespa versions, with deployment statistics,
* sorted from lowest to highest version number.
* The returned list is immutable.
* Calling this is free, but the returned status is slightly out of date.
*/
public List<VespaVersion> versions() { return versions; }
/** Returns the given version, or null if it is not present */
public VespaVersion version(Version version) {
return versions.stream().filter(v -> v.versionNumber().equals(version)).findFirst().orElse(null);
}
/** Create the empty version status */
public static VersionStatus empty() { return new VersionStatus(ImmutableList.of()); }
/** Create a full, updated version status. This is expensive and should be done infrequently */
public static VersionStatus compute(Controller controller) {
var systemApplicationVersions = findSystemApplicationVersions(controller);
var controllerVersions = findControllerVersions(controller);
var infrastructureVersions = ArrayListMultimap.<Version, HostName>create();
for (var kv : controllerVersions.asMap().entrySet()) {
infrastructureVersions.putAll(kv.getKey().version(), kv.getValue());
}
infrastructureVersions.putAll(systemApplicationVersions.asVersionMap());
// The system version is the oldest infrastructure version, if that version is newer than the current system
// version
Version newSystemVersion = infrastructureVersions.keySet().stream().min(Comparator.naturalOrder()).get();
Version systemVersion = controller.versionStatus().systemVersion()
.map(VespaVersion::versionNumber)
.orElse(newSystemVersion);
if (newSystemVersion.isBefore(systemVersion)) {
log.warning("Refusing to lower system version from " +
controller.systemVersion() +
" to " +
newSystemVersion +
", nodes on " + newSystemVersion + ": " +
infrastructureVersions.get(newSystemVersion).stream()
.map(HostName::value)
.collect(Collectors.joining(", ")));
} else {
systemVersion = newSystemVersion;
}
var deploymentStatistics = DeploymentStatistics.compute(infrastructureVersions.keySet(),
controller.jobController().deploymentStatuses(ApplicationList.from(controller.applications().asList())
.withProjectId()));
List<VespaVersion> versions = new ArrayList<>();
List<Version> releasedVersions = controller.mavenRepository().metadata().versions();
for (DeploymentStatistics statistics : deploymentStatistics) {
if (statistics.version().isEmpty()) continue;
try {
boolean isReleased = Collections.binarySearch(releasedVersions, statistics.version()) >= 0;
VespaVersion vespaVersion = createVersion(statistics,
controllerVersions.keySet(),
systemVersion,
isReleased,
systemApplicationVersions.matching(statistics.version()),
controller);
versions.add(vespaVersion);
} catch (IllegalArgumentException e) {
log.log(Level.WARNING, "Unable to create VespaVersion for version " +
statistics.version().toFullString(), e);
}
}
Collections.sort(versions);
return new VersionStatus(versions);
}
private static NodeVersions findSystemApplicationVersions(Controller controller) {
var nodeVersions = new LinkedHashMap<HostName, NodeVersion>();
for (var zone : controller.zoneRegistry().zones().controllerUpgraded().zones()) {
for (var application : SystemApplication.all()) {
var nodes = controller.serviceRegistry().configServer().nodeRepository()
.list(zone.getId(), application.id()).stream()
.filter(SystemUpgrader::eligibleForUpgrade)
.collect(Collectors.toList());
if (nodes.isEmpty()) continue;
var configConverged = application.configConvergedIn(zone.getId(), controller, Optional.empty());
if (!configConverged) {
log.log(LogLevel.WARNING, "Config for " + application.id() + " in " + zone.getId() +
" has not converged");
}
for (var node : nodes) {
// Only use current node version if config has converged
var version = configConverged ? node.currentVersion() : controller.systemVersion();
var nodeVersion = new NodeVersion(node.hostname(), zone.getId(), version, node.wantedVersion(),
node.suspendedSince());
nodeVersions.put(nodeVersion.hostname(), nodeVersion);
}
}
}
return NodeVersions.copyOf(nodeVersions);
}
private static ListMultimap<ControllerVersion, HostName> findControllerVersions(Controller controller) {
ListMultimap<ControllerVersion, HostName> versions = ArrayListMultimap.create();
if (controller.curator().cluster().isEmpty()) { // Use vtag if we do not have cluster
versions.put(ControllerVersion.CURRENT, controller.hostname());
} else {
for (HostName hostname : controller.curator().cluster()) {
versions.put(controller.curator().readControllerVersion(hostname), hostname);
}
}
return versions;
}
private static VespaVersion createVersion(DeploymentStatistics statistics,
Set<ControllerVersion> controllerVersions,
Version systemVersion,
boolean isReleased,
NodeVersions nodeVersions,
Controller controller) {
var latestVersion = controllerVersions.stream().max(Comparator.naturalOrder()).get();
var controllerVersion = controllerVersions.stream().min(Comparator.naturalOrder()).get();
var isSystemVersion = statistics.version().equals(systemVersion);
var isControllerVersion = statistics.version().equals(controllerVersion.version());
var confidence = controller.curator().readConfidenceOverrides().get(statistics.version());
var confidenceIsOverridden = confidence != null;
var previousStatus = controller.versionStatus().version(statistics.version());
// Compute confidence
if (!confidenceIsOverridden) {
// Always compute confidence for system and controller
if (isSystemVersion || isControllerVersion) {
confidence = VespaVersion.confidenceFrom(statistics, controller);
} else {
// This is an older version so we preserve the existing confidence, if any
confidence = getOrUpdateConfidence(statistics, controller);
}
}
// Preserve existing commit details if we've previously computed status for this version
var commitSha = latestVersion.commitSha();
var commitDate = latestVersion.commitDate();
if (previousStatus != null) {
commitSha = previousStatus.releaseCommit();
commitDate = previousStatus.committedAt();
// Keep existing confidence if we cannot raise it at this moment in time
if (!confidenceIsOverridden &&
!previousStatus.confidence().canChangeTo(confidence, controller.clock().instant())) {
confidence = previousStatus.confidence();
}
}
return new VespaVersion(statistics.version(),
commitSha,
commitDate,
isControllerVersion,
isSystemVersion,
isReleased,
nodeVersions,
confidence);
}
/**
* Calculate confidence from given deployment statistics.
*
* @return previously calculated confidence for this version. If none exists, a new confidence will be calculated.
*/
private static VespaVersion.Confidence getOrUpdateConfidence(DeploymentStatistics statistics, Controller controller) {
return controller.versionStatus().versions().stream()
.filter(v -> statistics.version().equals(v.versionNumber()))
.map(VespaVersion::confidence)
.findFirst()
.orElseGet(() -> VespaVersion.confidenceFrom(statistics, controller));
}
}
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