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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.maintenance;
import com.yahoo.component.Version;
import com.yahoo.config.provision.CloudName;
import com.yahoo.config.provision.zone.ZoneApi;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.versions.OsVersion;
import com.yahoo.vespa.hosted.controller.versions.OsVersionTarget;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDate;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
/**
* Automatically schedule OS upgrades.
*
* This is used in clouds where new OS versions regularly become available.
*
* @author mpolden
*/
public class OsUpgradeScheduler extends ControllerMaintainer {
/** Trigger a new upgrade when the current target version reaches this age */
private static final Duration MAX_VERSION_AGE = Duration.ofDays(30);
/**
* The interval at which new versions become available. We use this to avoid scheduling upgrades to a version that
* may not be available yet
*/
private static final Duration AVAILABILITY_INTERVAL = Duration.ofDays(7);
private static final DateTimeFormatter VERSION_DATE_PATTERN = DateTimeFormatter.ofPattern("yyyyMMdd");
public OsUpgradeScheduler(Controller controller, Duration interval) {
super(controller, interval);
}
@Override
protected boolean maintain() {
for (var cloud : supportedClouds()) {
Optional<Version> newTarget = newTargetIn(cloud);
if (newTarget.isEmpty()) continue;
controller().upgradeOsIn(cloud, newTarget.get(), Optional.of(upgradeBudget()), false);
}
return true;
}
/** Returns the new target version for given cloud, if any */
private Optional<Version> newTargetIn(CloudName cloud) {
Optional<Version> currentTarget = controller().osVersionTarget(cloud)
.map(OsVersionTarget::osVersion)
.map(OsVersion::version);
if (currentTarget.isEmpty()) return Optional.empty();
if (!hasExpired(currentTarget.get())) return Optional.empty();
Instant now = controller().clock().instant();
String qualifier = LocalDate.ofInstant(now.minus(AVAILABILITY_INTERVAL), ZoneOffset.UTC)
.format(VERSION_DATE_PATTERN);
return Optional.of(new Version(currentTarget.get().getMajor(),
currentTarget.get().getMinor(),
currentTarget.get().getMicro(),
qualifier));
}
/** Returns whether we should upgrade from given version */
private boolean hasExpired(Version version) {
String qualifier = version.getQualifier();
if (!qualifier.matches("^\\d{8,}")) return false;
String dateString = qualifier.substring(0, 8);
Instant now = controller().clock().instant();
Instant versionDate = LocalDate.parse(dateString, VERSION_DATE_PATTERN)
.atStartOfDay(ZoneOffset.UTC)
.toInstant();
return versionDate.isBefore(now.minus(MAX_VERSION_AGE));
}
/** Returns the clouds where we can safely schedule OS upgrades */
private Set<CloudName> supportedClouds() {
return controller().zoneRegistry().zones().reprovisionToUpgradeOs().zones().stream()
.map(ZoneApi::getCloudName)
.collect(Collectors.toUnmodifiableSet());
}
private Duration upgradeBudget() {
return controller().system().isCd() ? Duration.ofHours(1) : Duration.ofDays(14);
}
}
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