cloudwatch

在此博客中，我將解釋如何為您的Mule CloudHub應(yīng)用程序啟用AWS Cloudwatch日志 。 AWS提供了Cloudwatch Logs Services，以便您可以更好地管理日志。 它比松散便宜。 由于cloudhub會(huì)自動(dòng)翻轉(zhuǎn)超過(guò)100 MB的日志，因此我們需要一種機(jī)制來(lái)更有效地管理日志。 為此，我們創(chuàng)建此自定義附加程序，它將日志發(fā)送到cloudwatch。

package com.javaroots.appenders;import static java.util.Comparator.comparing; import static java.util.stream.Collectors.toList;import java.io.Serializable; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.Formatter; import java.util.List; import java.util.Optional; import java.util.concurrent.LinkedBlockingQueue; import java.util.concurrent.atomic.AtomicBoolean; import java.util.concurrent.atomic.AtomicReference;import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; import org.apache.logging.log4j.core.Filter; import org.apache.logging.log4j.core.Layout; import org.apache.logging.log4j.core.LogEvent; import org.apache.logging.log4j.core.appender.AbstractAppender; import org.apache.logging.log4j.core.config.plugins.Plugin; import org.apache.logging.log4j.core.config.plugins.PluginAttribute; import org.apache.logging.log4j.core.config.plugins.PluginElement; import org.apache.logging.log4j.core.config.plugins.PluginFactory; import org.apache.logging.log4j.status.StatusLogger;import com.amazonaws.regions.Regions; import com.amazonaws.services.logs.AWSLogs; import com.amazonaws.services.logs.model.CreateLogGroupRequest; import com.amazonaws.services.logs.model.CreateLogStreamRequest; import com.amazonaws.services.logs.model.CreateLogStreamResult; import com.amazonaws.services.logs.model.DataAlreadyAcceptedException; import com.amazonaws.services.logs.model.DescribeLogGroupsRequest; import com.amazonaws.services.logs.model.DescribeLogStreamsRequest; import com.amazonaws.services.logs.model.InputLogEvent; import com.amazonaws.services.logs.model.InvalidSequenceTokenException; import com.amazonaws.services.logs.model.LogGroup; import com.amazonaws.services.logs.model.LogStream; import com.amazonaws.services.logs.model.PutLogEventsRequest; import com.amazonaws.services.logs.model.PutLogEventsResult;@Plugin(name = "CLOUDW", category = "Core", elementType = "appender", printObject = true) public class CloudwatchAppender extends AbstractAppender {/*** */private static final long serialVersionUID = 12321345L;private static Logger logger2 = LogManager.getLogger(CloudwatchAppender.class);private final Boolean DEBUG_MODE = System.getProperty("log4j.debug") != null;/*** Used to make sure that on close() our daemon thread isn't also trying to sendMessage()s*/private Object sendMessagesLock = new Object();/*** The queue used to buffer log entries*/private LinkedBlockingQueue loggingEventsQueue;/*** the AWS Cloudwatch Logs API client*/private AWSLogs awsLogsClient;private AtomicReference lastSequenceToken = new AtomicReference<>();/*** The AWS Cloudwatch Log group name*/private String logGroupName;/*** The AWS Cloudwatch Log stream name*/private String logStreamName;/*** The queue / buffer size*/private int queueLength = 1024;/*** The maximum number of log entries to send in one go to the AWS Cloudwatch Log service*/private int messagesBatchSize = 128;private AtomicBoolean cloudwatchAppenderInitialised = new AtomicBoolean(false);private CloudwatchAppender(final String name,final Layout layout,final Filter filter,final boolean ignoreExceptions,String logGroupName, String logStreamName,Integer queueLength,Integer messagesBatchSize) {super(name, filter, layout, ignoreExceptions);this.logGroupName = logGroupName;this.logStreamName = logStreamName;this.queueLength = queueLength;this.messagesBatchSize = messagesBatchSize;this.activateOptions();}@Overridepublic void append(LogEvent event) {if (cloudwatchAppenderInitialised.get()) {loggingEventsQueue.offer(event);} else {// just do nothing}}public void activateOptions() {if (isBlank(logGroupName) || isBlank(logStreamName)) {logger2.error("Could not initialise CloudwatchAppender because either or both LogGroupName(" + logGroupName + ") and LogStreamName(" + logStreamName + ") are null or empty");this.stop();} else {//below lines work with aws version 1.9.40 for local build//this.awsLogsClient = new AWSLogsClient();//awsLogsClient.setRegion(Region.getRegion(Regions.AP_SOUTHEAST_2));this.awsLogsClient = com.amazonaws.services.logs.AWSLogsClientBuilder.standard().withRegion(Regions.AP_SOUTHEAST_2).build();loggingEventsQueue = new LinkedBlockingQueue<>(queueLength);try {initializeCloudwatchResources();initCloudwatchDaemon();cloudwatchAppenderInitialised.set(true);} catch (Exception e) {logger2.error("Could not initialise Cloudwatch Logs for LogGroupName: " + logGroupName + " and LogStreamName: " + logStreamName, e);if (DEBUG_MODE) {System.err.println("Could not initialise Cloudwatch Logs for LogGroupName: " + logGroupName + " and LogStreamName: " + logStreamName);e.printStackTrace();}}}}private void initCloudwatchDaemon() {Thread t = new Thread(() -> {while (true) {try {if (loggingEventsQueue.size() > 0) {sendMessages();}Thread.currentThread().sleep(20L);} catch (InterruptedException e) {if (DEBUG_MODE) {e.printStackTrace();}}}});t.setName("CloudwatchThread");t.setDaemon(true);t.start();}private void sendMessages() {synchronized (sendMessagesLock) {LogEvent polledLoggingEvent;final Layout layout = getLayout();List loggingEvents = new ArrayList<>();try {while ((polledLoggingEvent = loggingEventsQueue.poll()) != null && loggingEvents.size() <= messagesBatchSize) {loggingEvents.add(polledLoggingEvent);}List inputLogEvents = loggingEvents.stream().map(loggingEvent -> new InputLogEvent().withTimestamp(loggingEvent.getTimeMillis()).withMessage(layout == null ?loggingEvent.getMessage().getFormattedMessage():new String(layout.toByteArray(loggingEvent), StandardCharsets.UTF_8))).sorted(comparing(InputLogEvent::getTimestamp)).collect(toList());if (!inputLogEvents.isEmpty()) {PutLogEventsRequest putLogEventsRequest = new PutLogEventsRequest(logGroupName,logStreamName,inputLogEvents);try {putLogEventsRequest.setSequenceToken(lastSequenceToken.get());PutLogEventsResult result = awsLogsClient.putLogEvents(putLogEventsRequest);lastSequenceToken.set(result.getNextSequenceToken());} catch (DataAlreadyAcceptedException dataAlreadyAcceptedExcepted) {putLogEventsRequest.setSequenceToken(dataAlreadyAcceptedExcepted.getExpectedSequenceToken());PutLogEventsResult result = awsLogsClient.putLogEvents(putLogEventsRequest);lastSequenceToken.set(result.getNextSequenceToken());if (DEBUG_MODE) {dataAlreadyAcceptedExcepted.printStackTrace();}} catch (InvalidSequenceTokenException invalidSequenceTokenException) {putLogEventsRequest.setSequenceToken(invalidSequenceTokenException.getExpectedSequenceToken());PutLogEventsResult result = awsLogsClient.putLogEvents(putLogEventsRequest);lastSequenceToken.set(result.getNextSequenceToken());if (DEBUG_MODE) {invalidSequenceTokenException.printStackTrace();}}}} catch (Exception e) {if (DEBUG_MODE) {logger2.error(" error inserting cloudwatch:",e);e.printStackTrace();}}}}private void initializeCloudwatchResources() {DescribeLogGroupsRequest describeLogGroupsRequest = new DescribeLogGroupsRequest();describeLogGroupsRequest.setLogGroupNamePrefix(logGroupName);Optional logGroupOptional = awsLogsClient.describeLogGroups(describeLogGroupsRequest).getLogGroups().stream().filter(logGroup -> logGroup.getLogGroupName().equals(logGroupName)).findFirst();if (!logGroupOptional.isPresent()) {CreateLogGroupRequest createLogGroupRequest = new CreateLogGroupRequest().withLogGroupName(logGroupName);awsLogsClient.createLogGroup(createLogGroupRequest);}DescribeLogStreamsRequest describeLogStreamsRequest = new DescribeLogStreamsRequest().withLogGroupName(logGroupName).withLogStreamNamePrefix(logStreamName);Optional logStreamOptional = awsLogsClient.describeLogStreams(describeLogStreamsRequest).getLogStreams().stream().filter(logStream -> logStream.getLogStreamName().equals(logStreamName)).findFirst();if (!logStreamOptional.isPresent()) {CreateLogStreamRequest createLogStreamRequest = new CreateLogStreamRequest().withLogGroupName(logGroupName).withLogStreamName(logStreamName);CreateLogStreamResult o = awsLogsClient.createLogStream(createLogStreamRequest);}}private boolean isBlank(String string) {return null == string || string.trim().length() == 0;}protected String getSimpleStacktraceAsString(final Throwable thrown) {final StringBuilder stackTraceBuilder = new StringBuilder();for (StackTraceElement stackTraceElement : thrown.getStackTrace()) {new Formatter(stackTraceBuilder).format("%s.%s(%s:%d)%n",stackTraceElement.getClassName(),stackTraceElement.getMethodName(),stackTraceElement.getFileName(),stackTraceElement.getLineNumber());}return stackTraceBuilder.toString();}@Overridepublic void start() {super.start();}@Overridepublic void stop() {super.stop();while (loggingEventsQueue != null && !loggingEventsQueue.isEmpty()) {this.sendMessages();}}@Overridepublic String toString() {return CloudwatchAppender.class.getSimpleName() + "{"+ "name=" + getName() + " loggroupName=" + logGroupName+" logstreamName=" + logStreamName;}@PluginFactory@SuppressWarnings("unused")public static CloudwatchAppender createCloudWatchAppender(@PluginAttribute(value = "queueLength" ) Integer queueLength,@PluginElement("Layout") Layout layout,@PluginAttribute(value = "logGroupName") String logGroupName,@PluginAttribute(value = "logStreamName") String logStreamName,@PluginAttribute(value = "name") String name,@PluginAttribute(value = "ignoreExceptions", defaultBoolean = false) Boolean ignoreExceptions,@PluginAttribute(value = "messagesBatchSize") Integer messagesBatchSize){return new CloudwatchAppender(name, layout, null, ignoreExceptions, logGroupName, logStreamName ,queueLength,messagesBatchSize);} }

我們?cè)趐om.xml文件中添加依賴(lài)項(xiàng)。

<dependency><groupId>com.amazonaws</groupId><artifactId>aws-java-sdk-logs</artifactId><!-- for local 3.8.5 we need to use this version cloudhub 3.8.5 has jackson 2.6.6 --><!-- <version>1.9.40</version> --><version>1.11.105</version><exclusions><exclusion> <!-- declare the exclusion here --><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-1.2-api</artifactId></exclusion><exclusion> <!-- declare the exclusion here --><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId></exclusion><exclusion> <!-- declare the exclusion here --><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId></exclusion></exclusions></dependency><!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-api --><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-api</artifactId><version>2.5</version></dependency><!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core --><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-core</artifactId><version>2.5</version></dependency>

現(xiàn)在我們需要修改log4j2.xml。 還要添加自定義cloudwatch附加程序和CloudhubLogs附加程序，以便我們也可以獲取cloudhub上的日志。

<?xml version="1.0" encoding="utf-8"?> <Configuration status="trace" packages="au.edu.vu.appenders,com.mulesoft.ch.logging.appender"><!--These are some of the loggers you can enable. There are several more you can find in the documentation. Besides this log4j configuration, you can also use Java VM environment variablesto enable other logs like network (-Djavax.net.debug=ssl or all) and Garbage Collector (-XX:+PrintGC). These will be append to the console, so you will see them in the mule_ee.log file. --><Appenders><CLOUDW name="CloudW" logGroupName="test-log-stream" logStreamName="test44" messagesBatchSize="${sys:cloudwatch.msg.batch.size}" queueLength="${sys:cloudwatch.queue.length}"><PatternLayout pattern="%d [%t] %-5p %c - %m%n"/></CLOUDW><Log4J2CloudhubLogAppender name="CLOUDHUB"addressProvider="com.mulesoft.ch.logging.DefaultAggregatorAddressProvider"applicationContext="com.mulesoft.ch.logging.DefaultApplicationContext"appendRetryIntervalMs="${sys:logging.appendRetryInterval}"appendMaxAttempts="${sys:logging.appendMaxAttempts}"batchSendIntervalMs="${sys:logging.batchSendInterval}"batchMaxRecords="${sys:logging.batchMaxRecords}"memBufferMaxSize="${sys:logging.memBufferMaxSize}"journalMaxWriteBatchSize="${sys:logging.journalMaxBatchSize}"journalMaxFileSize="${sys:logging.journalMaxFileSize}"clientMaxPacketSize="${sys:logging.clientMaxPacketSize}"clientConnectTimeoutMs="${sys:logging.clientConnectTimeout}"clientSocketTimeoutMs="${sys:logging.clientSocketTimeout}"serverAddressPollIntervalMs="${sys:logging.serverAddressPollInterval}"serverHeartbeatSendIntervalMs="${sys:logging.serverHeartbeatSendIntervalMs}"statisticsPrintIntervalMs="${sys:logging.statisticsPrintIntervalMs}"><PatternLayout pattern="[%d{MM-dd HH:mm:ss}] %-5p %c{1} [%t] CUSTOM: %m%n"/></Log4J2CloudhubLogAppender></Appenders><Loggers><!-- Http Logger shows wire traffic on DEBUG --><AsyncLogger name="org.mule.module.http.internal.HttpMessageLogger" level="WARN"/><!-- JDBC Logger shows queries and parameters values on DEBUG --><AsyncLogger name="com.mulesoft.mule.transport.jdbc" level="WARN"/><!-- CXF is used heavily by Mule for web services --><AsyncLogger name="org.apache.cxf" level="WARN"/><!-- Apache Commons tend to make a lot of noise which can clutter the log--><AsyncLogger name="org.apache" level="WARN"/><!-- Reduce startup noise --><AsyncLogger name="org.springframework.beans.factory" level="WARN"/><!-- Mule classes --><AsyncLogger name="org.mule" level="INFO"/><AsyncLogger name="com.mulesoft" level="INFO"/><!-- Reduce DM verbosity --><AsyncLogger name="org.jetel" level="WARN"/><AsyncLogger name="Tracking" level="WARN"/><AsyncRoot level="INFO"><AppenderRef ref="CLOUDHUB" level="INFO"/><AppenderRef ref="CloudW" level="INFO"/></AsyncRoot></Loggers> </Configuration>

最后，我們需要在cloudhub運(yùn)行時(shí)管理器上禁用cloudhub日志。

這適用于cloudhub mule運(yùn)行時(shí)版本3.8.4。 cloudhub 3.8.5版本存在一些問(wèn)題，該版本已正確初始化并發(fā)送日志，但是缺少事件和消息。

翻譯自: https://www.javacodegeeks.com/2017/10/integrate-cloudwatch-logs-cloudhub-mule.html

cloudwatch

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