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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.controller.versions;
import com.google.common.collect.ImmutableList;
import com.yahoo.collections.ListMap;
import com.yahoo.component.Version;
import com.yahoo.component.Vtag;
import com.yahoo.vespa.hosted.controller.Application;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.api.integration.github.GitSha;
import com.yahoo.vespa.hosted.controller.application.ApplicationList;
import com.yahoo.vespa.hosted.controller.application.Deployment;
import com.yahoo.vespa.hosted.controller.application.JobList;
import java.net.URI;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import static com.yahoo.vespa.hosted.controller.application.DeploymentJobs.JobError.outOfCapacity;
/**
* 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
*/
public class VersionStatus {
private static final Logger log = Logger.getLogger(VersionStatus.class.getName());
private static final String VESPA_REPO = "vespa-yahoo";
private static final String VESPA_REPO_OWNER = "vespa";
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 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::isCurrentSystemVersion).findAny();
}
/**
* 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* Calling this is free, but the returned status is slightly out of date.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) {
return compute(controller, Vtag.currentVersion);
}
/** Compute version status using the given current version. This is useful for testing. */
public static VersionStatus compute(Controller controller, Version currentVersion) {
ListMap<Version, String> configServerVersions = findConfigServerVersions(controller);
Set<Version> infrastructureVersions = new HashSet<>();
infrastructureVersions.add(currentVersion);
infrastructureVersions.addAll(configServerVersions.keySet());
// The system version is the oldest infrastructure version
Version systemVersion = infrastructureVersions.stream().sorted().findFirst().get();
Collection<DeploymentStatistics> deploymentStatistics = computeDeploymentStatistics(infrastructureVersions,
controller.applications().asList());
List<VespaVersion> versions = new ArrayList<>();
for (DeploymentStatistics statistics : deploymentStatistics) {
if (statistics.version().isEmpty()) continue;
try {
VespaVersion vespaVersion = createVersion(statistics,
statistics.version().equals(systemVersion),
configServerVersions.getList(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 ListMap<Version, String> findConfigServerVersions(Controller controller) {
List<URI> configServers = controller.zoneRegistry().zones()
.controllerManaged()
.ids().stream()
.flatMap(zoneId -> controller.getSecureConfigServerUris(zoneId).stream())
.collect(Collectors.toList());
ListMap<Version, String> versions = new ListMap<>();
for (URI configServer : configServers)
versions.put(controller.applications().configServer().version(configServer), configServer.getHost());
return versions;
}
private static Collection<DeploymentStatistics> computeDeploymentStatistics(Set<Version> infrastructureVersions,
List<Application> applications) {
Map<Version, DeploymentStatistics> versionMap = new HashMap<>();
for (Version infrastructureVersion : infrastructureVersions) {
versionMap.put(infrastructureVersion, DeploymentStatistics.empty(infrastructureVersion));
}
ApplicationList applicationList = ApplicationList.from(applications)
.notPullRequest()
.hasProductionDeployment();
for (Application application : applicationList.asList()) {
// Note that each version deployed on this application in production exists
// (ignore non-production versions)
for (Deployment deployment : application.productionDeployments().values()) {
versionMap.computeIfAbsent(deployment.version(), DeploymentStatistics::empty);
}
// List versions which have failing jobs, versions which are in production, and versions for which there are running deployment jobs
// Failing versions
JobList.from(application)
.failing()
.not().failingApplicationChange()
.not().failingBecause(outOfCapacity)
.mapToList(job -> job.lastCompleted().get().version())
.forEach(version -> versionMap.put(version, versionMap.getOrDefault(version, DeploymentStatistics.empty(version)).withFailing(application.id())));
// Succeeding versions
JobList.from(application)
.lastSuccess().present()
.production()
.mapToList(job -> job.lastSuccess().get().version())
.forEach(version -> versionMap.put(version, versionMap.getOrDefault(version, DeploymentStatistics.empty(version)).withProduction(application.id())));
// Deploying versions
JobList.from(application)
.upgrading()
.mapToList(job -> job.lastTriggered().get().version())
.forEach(version -> versionMap.put(version, versionMap.getOrDefault(version, DeploymentStatistics.empty(version)).withDeploying(application.id())));
}
return versionMap.values();
}
private static VespaVersion createVersion(DeploymentStatistics statistics,
boolean isSystemVersion,
Collection<String> configServerHostnames,
Controller controller) {
GitSha gitSha = controller.gitHub().getCommit(VESPA_REPO_OWNER, VESPA_REPO, statistics.version().toFullString());
Instant releasedAt = Instant.ofEpochMilli(gitSha.commit.author.date.getTime()); // commitedAt ...
VespaVersion.Confidence confidence;
// Always compute confidence for system version
if (isSystemVersion) {
confidence = VespaVersion.confidenceFrom(statistics, controller);
} else {
// Keep existing confidence for non-system versions if already computed
confidence = confidenceFor(statistics.version(), controller)
.orElse(VespaVersion.confidenceFrom(statistics, controller));
}
return new VespaVersion(statistics,
gitSha.sha, releasedAt,
isSystemVersion,
configServerHostnames,
confidence
);
}
/** Returns the current confidence for the given version */
private static Optional<VespaVersion.Confidence> confidenceFor(Version version, Controller controller) {
return controller.versionStatus().versions().stream()
.filter(v -> version.equals(v.versionNumber()))
.map(VespaVersion::confidence)
.findFirst();
}
}
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