/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.controller;
import org.apache.nifi.annotation.documentation.CapabilityDescription;
import org.apache.nifi.annotation.documentation.Tags;
import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.logging.ComponentLog;
import org.apache.nifi.processor.util.StandardValidators;
import org.apache.nifi.reporting.AbstractReportingTask;
import org.apache.nifi.reporting.ReportingContext;
import org.apache.nifi.util.FormatUtils;
import java.io.File;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@Tags({"disk", "storage", "warning", "monitoring", "repo"})
@CapabilityDescription("Checks the amount of storage space available for the specified directory"
+ " and warns (via a log message and a System-Level Bulletin) if the partition on which it lives exceeds"
+ " some configurable threshold of storage space")
public class MonitorDiskUsage extends AbstractReportingTask {
private static final Pattern PERCENT_PATTERN = Pattern.compile("(\\d+{1,2})%");
public static final PropertyDescriptor DIR_THRESHOLD = new PropertyDescriptor.Builder()
.name("Threshold")
.description("The threshold at which a bulletin will be generated to indicate that the disk usage of the partition on which the directory found is of concern")
.required(true)
.addValidator(StandardValidators.createRegexMatchingValidator(PERCENT_PATTERN))
.defaultValue("80%")
.build();
public static final PropertyDescriptor DIR_LOCATION = new PropertyDescriptor.Builder()
.name("Directory Location")
.description("The directory path of the partition to be monitored.")
.required(true)
.addValidator(StandardValidators.createDirectoryExistsValidator(false, false))
.build();
public static final PropertyDescriptor DIR_DISPLAY_NAME = new PropertyDescriptor.Builder()
.name("Directory Display Name")
.description("The name to display for the directory in alerts.")
.required(false)
.addValidator(StandardValidators.NON_BLANK_VALIDATOR)
.defaultValue("Un-Named")
.build();
@Override
protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
final List<PropertyDescriptor> descriptors = new ArrayList<>(2);
descriptors.add(DIR_THRESHOLD);
descriptors.add(DIR_LOCATION);
descriptors.add(DIR_DISPLAY_NAME);
return descriptors;
}
@Override
public void onTrigger(final ReportingContext context) {
final String thresholdValue = context.getProperty(DIR_THRESHOLD).getValue();
final Matcher thresholdMatcher = PERCENT_PATTERN.matcher(thresholdValue.trim());
thresholdMatcher.find();
final String thresholdPercentageVal = thresholdMatcher.group(1);
final int contentRepoThreshold = Integer.parseInt(thresholdPercentageVal);
final File dir = new File(context.getProperty(DIR_LOCATION).getValue());
final String dirName = context.getProperty(DIR_DISPLAY_NAME).getValue();
checkThreshold(dirName, dir.toPath(), contentRepoThreshold, getLogger());
}
static void checkThreshold(final String pathName, final Path path, final int threshold, final ComponentLog logger) {
final File file = path.toFile();
final long totalBytes = file.getTotalSpace();
final long freeBytes = file.getFreeSpace();
final long usedBytes = totalBytes - freeBytes;
final double usedPercent = (double) usedBytes / (double) totalBytes * 100D;
if (usedPercent >= threshold) {
final String usedSpace = FormatUtils.formatDataSize(usedBytes);
final String totalSpace = FormatUtils.formatDataSize(totalBytes);
final String freeSpace = FormatUtils.formatDataSize(freeBytes);
final double freePercent = (double) freeBytes / (double) totalBytes * 100D;
final String message = String.format("%1$s exceeds configured threshold of %2$s%%, having %3$s / %4$s (%5$.2f%%) used and %6$s (%7$.2f%%) free",
pathName, threshold, usedSpace, totalSpace, usedPercent, freeSpace, freePercent);
logger.warn(message);
}
}
}