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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.maintenance.disk;
import com.yahoo.vespa.hosted.node.admin.maintenance.coredump.CoredumpHandler;
import com.yahoo.vespa.hosted.node.admin.task.util.file.FileFinder;
import java.nio.file.Path;
import java.time.Instant;
import java.time.ZoneOffset;
import java.time.temporal.ChronoField;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;
import static com.yahoo.vespa.hosted.node.admin.maintenance.disk.DiskCleanupRule.PrioritizedFileAttributes;
import static com.yahoo.vespa.hosted.node.admin.maintenance.disk.DiskCleanupRule.Priority;
import static com.yahoo.vespa.hosted.node.admin.task.util.file.FileFinder.FileAttributes;
import static com.yahoo.vespa.hosted.node.admin.task.util.file.FileFinder.nameStartsWith;
/**
* @author freva
*/
public class CoredumpCleanupRule {
private static final Comparator<FileAttributes> CORE_DUMP_FILE_ATTRIBUTE_COMPARATOR = Comparator
.comparing((FileAttributes fa) -> !fa.filename().contains("vespa-"))
.thenComparing(FileAttributes::lastModifiedTime);
public static DiskCleanupRule forContainer(Path containerCrashPath) {
return new ContainerCoredumpCleanupRule(containerCrashPath);
}
public static DiskCleanupRule forHost(Path processedCoredumpsPath) {
return new HostCoredumpCleanupRule(processedCoredumpsPath);
}
/** Assigns MEDIUM priority to the oldest, unprocessed coredump and HIGHEST for the remaining */
private static class ContainerCoredumpCleanupRule implements DiskCleanupRule {
private final Path containerCrashPath;
private ContainerCoredumpCleanupRule(Path containerCrashPath) {
this.containerCrashPath = containerCrashPath;
}
@Override
public Collection<PrioritizedFileAttributes> prioritize() {
List<FileAttributes> fileAttributes = FileFinder.files(containerCrashPath)
.maxDepth(1).stream()
.sorted(CORE_DUMP_FILE_ATTRIBUTE_COMPARATOR)
.toList();
return mapFirstAndRemaining(fileAttributes, Priority.MEDIUM, Priority.HIGHEST).toList();
}
}
/** Assigns MEDIUM priority to the first coredump of the day for each container, HIGH for the remaining */
private static class HostCoredumpCleanupRule implements DiskCleanupRule {
private final Path processedCoredumpsPath;
private HostCoredumpCleanupRule(Path processedCoredumpsPath) {
this.processedCoredumpsPath = processedCoredumpsPath;
}
@Override
public Collection<PrioritizedFileAttributes> prioritize() {
Map<String, List<FileAttributes>> fileAttributesByContainerDay = FileFinder.files(processedCoredumpsPath)
.match(nameStartsWith(CoredumpHandler.COREDUMP_FILENAME_PREFIX))
.stream()
.sorted(CORE_DUMP_FILE_ATTRIBUTE_COMPARATOR)
.collect(Collectors.groupingBy(
// Group FileAttributes by string [container-name]_[day of year], e.g. zt00534-v6-2_234
fa -> containerNameFromProcessedCoredumpPath(fa.path()) + "_" + dayOfYear(fa.lastModifiedTime()),
Collectors.collectingAndThen(
Collectors.toCollection(ArrayList::new),
l -> { l.sort(CORE_DUMP_FILE_ATTRIBUTE_COMPARATOR); return l; } )));
return fileAttributesByContainerDay.values().stream()
.flatMap(fa -> mapFirstAndRemaining(fa, Priority.MEDIUM, Priority.HIGH))
.toList();
}
}
/**
* Maps list of FileAttributes into list of PrioritizedFileAttributes where the first FileAttribute is given
* {@code first} priority, while the remaining FileAttributes are given {@code remaining} priority */
private static Stream<PrioritizedFileAttributes> mapFirstAndRemaining(List<FileAttributes> fileAttributes, Priority first, Priority remaining) {
return IntStream.range(0, fileAttributes.size())
.mapToObj(i -> new PrioritizedFileAttributes(fileAttributes.get(i), i == 0 ? first : remaining));
}
/** Extracts container-name from path under processed-coredumps or empty string */
private static String containerNameFromProcessedCoredumpPath(Path path) {
if (path.getNameCount() < 3) return ""; // Path is too short
return path.getName(path.getNameCount() - 3).toString();
}
/** Returns day number of the year (1-365 (or 366 for leap years)) */
private static int dayOfYear(Instant instant) {
return instant.atOffset(ZoneOffset.UTC).get(ChronoField.DAY_OF_YEAR);
}
}
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