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package com.yahoo.vespa.config.server.maintenance;
import com.yahoo.cloud.config.ConfigserverConfig;
import com.yahoo.config.FileReference;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.vespa.config.ConnectionPool;
import com.yahoo.vespa.config.server.ApplicationRepository;
import com.yahoo.vespa.config.server.session.RemoteSession;
import com.yahoo.vespa.config.server.session.SessionRepository;
import com.yahoo.vespa.config.server.tenant.Tenant;
import com.yahoo.vespa.curator.Curator;
import com.yahoo.vespa.defaults.Defaults;
import com.yahoo.vespa.filedistribution.FileDownloader;
import com.yahoo.vespa.flags.BooleanFlag;
import com.yahoo.vespa.flags.FlagSource;
import com.yahoo.vespa.flags.Flags;
import java.io.File;
import java.time.Duration;
import java.util.logging.Logger;
import static com.yahoo.vespa.config.server.filedistribution.FileDistributionUtil.createConnectionPool;
import static com.yahoo.vespa.config.server.filedistribution.FileDistributionUtil.fileReferenceExistsOnDisk;
/**
* Verifies that all active sessions has an application package on local disk.
* If not, the package is downloaded with file distribution. This can happen e.g.
* if a configserver is down when the application is deployed.
*
* @author gjoranv
*/
public class ApplicationPackageMaintainer extends ConfigServerMaintainer {
private static final Logger log = Logger.getLogger(ApplicationPackageMaintainer.class.getName());
private final ApplicationRepository applicationRepository;
private final ConnectionPool connectionPool;
private final File downloadDirectory;
private final BooleanFlag distributeApplicationPackage;
ApplicationPackageMaintainer(ApplicationRepository applicationRepository,
Curator curator,
Duration interval,
FlagSource flagSource) {
super(applicationRepository, curator, flagSource, interval, interval);
this.applicationRepository = applicationRepository;
ConfigserverConfig configserverConfig = applicationRepository.configserverConfig();
connectionPool = createConnectionPool(configserverConfig);
distributeApplicationPackage = Flags.CONFIGSERVER_DISTRIBUTE_APPLICATION_PACKAGE.bindTo(flagSource);
downloadDirectory = new File(Defaults.getDefaults().underVespaHome(configserverConfig.fileReferencesDir()));
}
@Override
protected boolean maintain() {
boolean success = true;
if (! distributeApplicationPackage.value()) return success;
try (var fileDownloader = new FileDownloader(connectionPool, downloadDirectory)) {
for (var applicationId : applicationRepository.listApplications()) {
log.fine(() -> "Verifying application package for " + applicationId);
RemoteSession session = applicationRepository.getActiveSession(applicationId);
if (session == null) continue; // App might be deleted after call to listApplications()
FileReference applicationPackage = session.getApplicationPackageReference();
long sessionId = session.getSessionId();
log.fine(() -> "Verifying application package file reference " + applicationPackage + " for session " + sessionId);
if (applicationPackage != null) {
if (! fileReferenceExistsOnDisk(downloadDirectory, applicationPackage)) {
log.fine(() -> "Downloading missing application package for application " + applicationId + " - session " + sessionId);
if (fileDownloader.getFile(applicationPackage).isEmpty()) {
success = false;
log.warning("Failed to download application package for application " + applicationId + " - session " + sessionId);
continue;
}
}
createLocalSessionIfMissing(applicationId, sessionId);
}
}
}
return success;
}
@Override
public void close() {
connectionPool.close();
super.close();
}
private void createLocalSessionIfMissing(ApplicationId applicationId, long sessionId) {
Tenant tenant = applicationRepository.tenantRepository().getTenant(applicationId.tenant());
SessionRepository sessionRepository = tenant.getSessionRepository();
if (sessionRepository.getLocalSession(sessionId) == null)
sessionRepository.createLocalSessionUsingDistributedApplicationPackage(sessionId);
}
}
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