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/* This file is part of VoltDB.
* Copyright (C) 2008-2020 VoltDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with VoltDB. If not, see .
*/
package org.voltdb;
import java.io.File;
import java.util.EnumSet;
import java.util.List;
import org.voltcore.logging.VoltLogger;
import org.voltcore.utils.CoreUtils;
import org.voltdb.compiler.deploymentfile.DiskLimitType;
import org.voltdb.compiler.deploymentfile.FeatureNameType;
import org.voltdb.licensetool.LicenseApi;
import org.voltdb.snmp.FaultFacility;
import org.voltdb.snmp.SnmpTrapSender;
import org.voltdb.snmp.ThresholdType;
import org.voltdb.utils.MiscUtils;
import org.voltdb.utils.VoltFile;
import com.google_voltpatches.common.collect.ImmutableMap;
/**
* Disk space monitoring related functionality of resource monitoring.
*/
public class DiskResourceChecker
{
private static final VoltLogger m_logger = new VoltLogger("HOST");
static FileCheckForTest s_testFileCheck; // used only for testing
private ImmutableMap m_configuredLimits;
private SnmpTrapSender m_snmpTrapSender;
private boolean m_snmpDiskTrapSent = false;
public DiskResourceChecker(DiskLimitType diskLimit, SnmpTrapSender snmpTrapSender) {
findDiskLimitConfiguration(diskLimit);
m_snmpTrapSender = snmpTrapSender;
m_snmpDiskTrapSent = false;
}
public DiskResourceChecker(DiskLimitType diskLimit)
{
this(diskLimit, null);
}
public boolean hasLimitsConfigured()
{
if (m_configuredLimits==null) {
return false;
}
for (FeatureDiskLimitConfig config : m_configuredLimits.values())
{
if (config.m_diskSizeLimit > 0 || config.m_diskSizeLimitPerc > 0 ||
config.m_diskSizeLimitSnmp > 0 || config.m_diskSizeLimitPercSnmp > 0) {
return true;
}
}
return false;
}
public void logConfiguredLimits()
{
if (m_configuredLimits==null) {
return;
}
for (FeatureDiskLimitConfig config : m_configuredLimits.values())
{
if (config.m_diskSizeLimit > 0 || config.m_diskSizeLimitPerc > 0) {
m_logger.info(config.m_featureName.value() + " on " + config.m_path + " configured with size limit: " +
(config.m_diskSizeLimit > 0 ? config.m_diskSizeLimit + "GB" : config.m_diskSizeLimitPerc + "%"));
}
if ((MiscUtils.isPro()) && (config.m_diskSizeLimitSnmp > 0 || config.m_diskSizeLimitPercSnmp > 0)) {
m_logger.info(config.m_featureName.value() + " on " + config.m_path + " configured with SNMP notification limit: " +
(config.m_diskSizeLimitSnmp > 0 ? config.m_diskSizeLimitSnmp + "GB" : config.m_diskSizeLimitPercSnmp + "%"));
}
}
}
public boolean isOverLimitConfiguration() {
if (m_configuredLimits == null) {
return false;
}
for (FeatureDiskLimitConfig config : m_configuredLimits.values()) {
if (config.m_diskSizeLimitSnmp > 0 || config.m_diskSizeLimitPercSnmp > 0) {
isDiskAvailable(config.m_path, config.m_diskSizeLimitPercSnmp,
config.m_diskSizeLimitSnmp,
config.m_featureName, true);
}
if (config.m_diskSizeLimit <= 0 && config.m_diskSizeLimitPerc <= 0) {
continue;
}
if (!isDiskAvailable(config.m_path, config.m_diskSizeLimitPerc, config.m_diskSizeLimit,
config.m_featureName)) {
m_logger.error("Disk is over configured limits for feature " + config.m_featureName);
return true;
}
}
return false;
}
private void findDiskLimitConfiguration(DiskLimitType diskLimit)
{
// By now we know that resource monitor is not null
DiskLimitType diskLimitConfig = diskLimit;
if (diskLimitConfig==null) {
return;
}
List features = diskLimitConfig.getFeature();
if (features==null || features.isEmpty()) {
return;
}
ImmutableMap.Builder builder = new ImmutableMap.Builder<>();
EnumSet configuredFeatures = EnumSet.noneOf(FeatureNameType.class);
if (features!=null && !features.isEmpty())
{
for (DiskLimitType.Feature feature : features) {
configuredFeatures.add(feature.getName());
if (!isSupportedFeature(feature.getName())) {
m_logger.warn("Ignoring unsupported feature " + feature.getName());
continue;
}
String size = feature.getSize();
String snmpSize = feature.getAlert();
FeatureDiskLimitConfig aConfig =
new FeatureDiskLimitConfig(feature.getName(), size, snmpSize);
builder.put(feature.getName(), aConfig);
if (m_logger.isDebugEnabled()) {
m_logger.debug("Added disk usage limit configuration " + (size == null? "no limit ": size) +
"snmp alert configuration " + (snmpSize == null? "no limit ": snmpSize) +
" for feature " + feature.getName());
}
}
}
m_configuredLimits = builder.build();
}
private boolean isSupportedFeature(FeatureNameType featureName)
{
LicenseApi licenseApi = VoltDB.instance().getLicenseApi();
if (licenseApi==null) { // this is null when compile deployment is called at startup.
// Ignore at that point. This will be checked later.
return true;
}
switch(featureName)
{
case COMMANDLOG:
case COMMANDLOGSNAPSHOT:
return licenseApi.isCommandLoggingAllowed();
case DROVERFLOW:
return licenseApi.isDrReplicationAllowed();
case SNAPSHOTS:
case EXPORTOVERFLOW:
case TOPICSDATA:
return true;
default: return false;
}
}
private boolean isDiskAvailable(File filePath, int percThreshold, double sizeThreshold, FeatureNameType featureName) {
return isDiskAvailable(filePath, percThreshold, sizeThreshold, featureName, false);
}
private boolean isDiskAvailable(File filePath, int percThreshold, double sizeThreshold, FeatureNameType featureName, boolean forSnmp)
{
boolean canWrite = (s_testFileCheck==null) ? filePath.canWrite() : s_testFileCheck.canWrite(filePath);
ThresholdType snmpCriteria = percThreshold > 0? ThresholdType.PERCENT:ThresholdType.LIMIT;
if (!canWrite) {
org.voltdb.VoltDB.crashLocalVoltDB(
String.format("Invalid or readonly file path %s (%s).",filePath, featureName.value()));
return false;
}
long total = (s_testFileCheck==null) ? filePath.getTotalSpace() : s_testFileCheck.getTotalSpace(filePath);
long usable = (s_testFileCheck==null) ? filePath.getUsableSpace() : s_testFileCheck.getUsableSpace(filePath);
long calculatedThreshold = Math.round(sizeThreshold*1073741824);
if (percThreshold > 0) {
calculatedThreshold = Math.round(total*percThreshold/100.0);
}
long usedSpace = total - usable;
if (m_logger.isDebugEnabled()) {
m_logger.debug(
String.format("File system for path %s has total space=%d and used space=%d. percentage-threshold=%d, size-threshold=%fGB, calculated-threshold=%d",
filePath, total, usedSpace, percThreshold, sizeThreshold, calculatedThreshold));
}
if (usedSpace >= calculatedThreshold) {
if (forSnmp) {
if (MiscUtils.isPro() && !m_snmpDiskTrapSent) {
m_snmpTrapSender.resource(snmpCriteria, FaultFacility.DISK, calculatedThreshold, usedSpace,
String.format(
"SNMP resource limit exceeded. Disk for path %s (%s) limit %s on %s. Current disk usage is %s.",
filePath, featureName.value(),
(percThreshold > 0 ? percThreshold + "%" : sizeThreshold + " GB"),
CoreUtils.getHostnameOrAddress(), HealthMonitor.getValueWithUnit(usedSpace)));
m_snmpDiskTrapSent = true;
}
} else {
m_logger.error(String.format(
"Resource limit exceeded. Disk for path %s (%s) limit %s on %s. Setting database to read-only. "
+ "Use \"voltadmin resume\" command once resource constraint is corrected.",
filePath, featureName.value(), (percThreshold > 0 ? percThreshold + "%" : sizeThreshold + " GB"),
CoreUtils.getHostnameOrAddress()));
m_logger.error(String.format("Resource limit exceeded. Current disk usage for path %s (%s) is %s.",
filePath, featureName.value(), HealthMonitor.getValueWithUnit(usedSpace)));
}
return false;
} else {
if (forSnmp && m_snmpDiskTrapSent) {
m_snmpTrapSender.resourceClear(snmpCriteria, FaultFacility.DISK, calculatedThreshold, usedSpace,
String.format(
"SNMP resource limit cleared. Disk for path %s (%s) limit %s on %s. Current disk usage is %s.",
filePath, featureName.value(),
(percThreshold > 0 ? percThreshold + "%" : sizeThreshold + " GB"),
CoreUtils.getHostnameOrAddress(), HealthMonitor.getValueWithUnit(usedSpace)));
m_snmpDiskTrapSent = false;
}
return true;
}
}
private static File getPathForFeature(FeatureNameType featureName)
{
switch(featureName) {
case COMMANDLOG :
return new VoltFile(VoltDB.instance().getCommandLogPath());
case COMMANDLOGSNAPSHOT :
return new VoltFile(VoltDB.instance().getCommandLogSnapshotPath());
case DROVERFLOW:
return new VoltFile(VoltDB.instance().getDROverflowPath());
case EXPORTOVERFLOW:
return VoltDB.instance().getExportOverflowPath();
case SNAPSHOTS:
return new VoltFile(VoltDB.instance().getSnapshotPath());
case TOPICSDATA:
return VoltDB.instance().getTopicsDataPath();
default: // Not a valid feature or one that is supported for disk limit monitoring.
// Should not happen unless we forget to add a newly supported feature here.
return null;
}
}
// Utility class that holds all the parameters for a feature
private static class FeatureDiskLimitConfig
{
final FeatureNameType m_featureName;
final File m_path;
final double m_diskSizeLimit;
final int m_diskSizeLimitPerc;
final double m_diskSizeLimitSnmp;
final int m_diskSizeLimitPercSnmp;
FeatureDiskLimitConfig(FeatureNameType featureName, String sizeConfig, String sizeConfigSnmp)
{
m_featureName = featureName;
m_path = getPathForFeature(featureName);
if (m_path==null) {
throw new IllegalArgumentException(
featureName + " is not a valid feature or not one supported for disk limit monitoring");
}
if (sizeConfig==null || sizeConfig.trim().isEmpty()) {
m_diskSizeLimit = 0;
m_diskSizeLimitPerc = 0;
} else {
String str = sizeConfig.trim();
try {
if (str.charAt(str.length()-1) == '%') {
m_diskSizeLimit = 0;
m_diskSizeLimitPerc = Integer.parseInt(str.substring(0, str.length()-1));
if (m_diskSizeLimitPerc > 99 || m_diskSizeLimitPerc < 0) {
throw new IllegalArgumentException(
"Invalid percentage value " + sizeConfig + " configured for disk limit size for feature " + featureName);
}
} else {
m_diskSizeLimit = Double.parseDouble(str);
m_diskSizeLimitPerc = 0;
}
} catch(NumberFormatException e) {
throw new IllegalArgumentException(
"Invalid value " + sizeConfig + " configured for disk limit size for feature " + featureName);
}
}
if (sizeConfigSnmp==null || sizeConfigSnmp.trim().isEmpty()) {
m_diskSizeLimitSnmp = 0;
m_diskSizeLimitPercSnmp = 0;
} else {
String str = sizeConfigSnmp.trim();
try {
if (str.charAt(str.length()-1) == '%') {
m_diskSizeLimitSnmp = 0;
m_diskSizeLimitPercSnmp = Integer.parseInt(str.substring(0, str.length()-1));
if (m_diskSizeLimitPerc > 99 || m_diskSizeLimitPerc < 0) {
throw new IllegalArgumentException(
"Invalid percentage value " + sizeConfig + " configured for disk limit size for feature " + featureName);
}
} else {
m_diskSizeLimitSnmp = Double.parseDouble(str);
m_diskSizeLimitPercSnmp = 0;
}
} catch(NumberFormatException e) {
throw new IllegalArgumentException(
"Invalid value " + sizeConfigSnmp + " configured for disk snmp alert limit size for feature " + featureName);
}
}
}
}
}
