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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.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.api.integration.configserver.Node;
import com.yahoo.vespa.hosted.controller.application.SystemApplication;
import com.yahoo.vespa.hosted.controller.versions.OsVersion;
import java.time.Duration;
import java.util.Optional;
import java.util.Set;
import java.util.logging.Logger;
/**
* Maintenance job that schedules upgrades of OS / kernel on nodes in the system.
*
* @author mpolden
*/
public class OsUpgrader extends InfrastructureUpgrader {
private static final Logger log = Logger.getLogger(OsUpgrader.class.getName());
private static final Set<Node.State> upgradableNodeStates = Set.of(
Node.State.ready,
Node.State.active,
Node.State.reserved
);
private final CloudName cloud;
public OsUpgrader(Controller controller, Duration interval, JobControl jobControl, CloudName cloud) {
super(controller, interval, jobControl, controller.zoneRegistry().osUpgradePolicy(cloud), name(cloud));
this.cloud = cloud;
}
@Override
protected void upgrade(Version target, SystemApplication application, ZoneApi zone) {
if (!application.isEligibleForOsUpgrades()) return;
var existingTarget = targetVersion(zone, application);
if (existingTarget.isPresent() && existingTarget.get().equals(target)) return;
log.info(String.format("Upgrading OS of %s to version %s in %s in cloud %s", application.id(), target, zone.getId(), zone.getCloudName()));
controller().serviceRegistry().configServer().nodeRepository().upgradeOs(zone.getId(), application.nodeType(), target);
}
@Override
protected boolean convergedOn(Version target, SystemApplication application, ZoneApi zone) {
return currentVersion(zone, application, target).equals(target);
}
@Override
protected boolean requireUpgradeOf(Node node, SystemApplication application, ZoneApi zone) {
return cloud.equals(zone.getCloudName()) && eligibleForUpgrade(node, application);
}
@Override
protected Optional<Version> targetVersion() {
// Return target if we have nodes in this cloud on a lower version
return controller().osVersion(cloud)
.filter(target -> controller().osVersionStatus().nodesIn(cloud).stream()
.anyMatch(node -> node.version().isBefore(target.version())))
.map(OsVersion::version);
}
private Version currentVersion(ZoneApi zone, SystemApplication application, Version defaultVersion) {
return minVersion(zone, application, Node::currentOsVersion).orElse(defaultVersion);
}
private Optional<Version> targetVersion(ZoneApi zone, SystemApplication application) {
return controller().serviceRegistry().configServer().nodeRepository()
.targetVersionsOf(zone.getId())
.osVersion(application.nodeType());
}
/** Returns whether node in application should be upgraded by this */
public static boolean eligibleForUpgrade(Node node, SystemApplication application) {
return upgradableNodeStates.contains(node.state()) &&
application.isEligibleForOsUpgrades();
}
private static String name(CloudName cloud) {
return capitalize(cloud.value()) + OsUpgrader.class.getSimpleName(); // Prefix maintainer name with cloud name
}
private static String capitalize(String s) {
if (s.isEmpty()) {
return s;
}
char firstLetter = Character.toUpperCase(s.charAt(0));
if (s.length() > 1) {
return firstLetter + s.substring(1).toLowerCase();
}
return String.valueOf(firstLetter);
}
}
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