一、tomcat 可監控的內容
tomcat 通過 jmx 的形式對外提供 tomcat 的監控數據，比如：堆內存使用情況、線程使用情況等。一般通過 jdk 的工具 jconsole、jvisualvm 工具連接 在 tomcat 上開的 jmx 端口，可以界面化看到。監控數據項在 tomcat 本身是通過 Mbean 提供的，要想知道 tomcat 有哪些 Mbean，可以使用 jconsole 進行查看，該工具默認就有 Mbean 這個 tab。
| 監控項類別 | 監控項 | 說明 |
| Catalina:type=Connector,port=<端口> | URIEncoding | 編碼方式，默認 UTF-8 |
| acceptCount | 可以建立的最大 tcp 連接數 | |
| address | ||
| ajpFlush | ||
| allowTrace | ||
| allowedRequestAttributesPattern | ||
| ciphers | ||
| ciphersUsed | ||
| className | ||
| connectionLinger | ||
| enableLookups | ||
| connectionTimeout | tcp 連接建立超時時間 | |
| executorName | ||
| keepAliveTimeout | 連接 keepalived 超時時間 | |
| localPort | tomcat 啟動端口 | |
| maxHeaderCount | ||
| maxKeepAliveRequests | ||
| maxParameterCount | ||
| maxPostSize | ||
| maxSavePostSize | ||
| maxSwallowSize | ||
| maxThreads | 最大http並發請求數 | |
| minSpareThreads | 允許的最小http空閑請求線程數 | |
| modelerType | ||
| packetSize | ||
| port | ||
| processorCache | ||
| protocol | http 請求所使用的協議 | |
| protocolHandlerClassName | ||
| proxyName | ||
| proxyPort | ||
| redirectPort | 默認是 8443 | |
| scheme | 默認是 http | |
| secret | ||
| secretRequired | ||
| secure | ||
| sslProtocols | ||
| stateName | ||
| tcpNoDelay | ||
| threadPriority | ||
| useBodyEncodingForURI | ||
| useIPVHosts | ||
| xpoweredBy | ||
| Catalina:type=GlobalRequestProcessor,name="http-nio-<端口>" 在代碼中Mbean 獲取時，可以配置 Catalina:type=GlobalRequestProcessor,name="*" |
bytesReceived | |
| bytesSent | ||
| errorCount | 從tomcat啟動以來 ，其處理的請求失敗的個數 | |
| maxTime | 從tomcat啟動以來 ，處理的請求中耗時最長的時間 | |
| modelerType | ||
| processingTime | 從tomcat 啟動以來，處理請求所耗費的總時長 | |
| Catalina:type=Host,host=localhost （localhost的信息，一般是在server.xml 中 host （localhost）的靜態配置信息） |
aliases | |
| appBase | war包所在父目錄，默認為 webapps | |
| autoDeploy | boolean 值，是否自動加載 | |
| backgroundProcessorDelay | ||
| children | 部署在 appBase下的war包列表 | |
| configClass | ||
| contextClass | ||
| copyXML | ||
| createDirs | ||
| deployIgnore | ||
| deployXML | ||
| errorReportValveClass | ||
| modelerType | ||
| name | ||
| startChildren | ||
| startStopThreads | ||
| stateName | 運行狀態 | |
| undeployOldVersions | ||
| unpackWARs | 布爾值，是否自動解壓war包 | |
| valveNames | ||
| workDir | ||
| xmlBase | ||
| Catalina:type=ProtocolHandler,port=8080 | acceptCount | |
| acceptorThreadCount | ||
| acceptorThreadPriority | ||
| algorithm | ||
| allowHostHeaderMismatch | ||
| allowedTrailerHeaders | ||
| aprRequired | ||
| backlog | ||
| ciphers | ||
| clientAuth | ||
| clientCertProvider | ||
| compressableMimeType | ||
| compressableMimeTypes | ||
| compressibleMimeType | ||
| compressibleMimeTypes | ||
| compression | ||
| compressionMinSize | ||
| connectionCount | ||
| connectionLinger | ||
| connectionTimeout | ||
| connectionUploadTimeout | ||
| continueResponseTiming | ||
| crlFile | ||
| defaultSSLHostConfigName | ||
| disableUploadTimeout | ||
| domain | ||
| globalRequestProcessorMBeanName | ||
| keepAliveTimeout | ||
| keyAlias | ||
| keyPass | ||
| keystoreFile | ||
| keystorePass | ||
| keystoreProvider | ||
| keystoreType | ||
| localPort | ||
| maxConnections | ||
| maxExtensionSize | ||
| maxHeaderCount | ||
| maxHttpHeaderSize | ||
| maxKeepAliveRequests | ||
| maxSavePostSize | ||
| maxSwallowSize | ||
| maxThreads | ||
| maxTrailerSize | ||
| minSpareThreads | ||
| modelerType | ||
| name | ||
| nameIndex | ||
| noCompressionStrongETag | ||
| noCompressionUserAgents | ||
| objectName | ||
| pollerThreadCount | ||
| pollerThreadPriority | ||
| port | ||
| processorCache | ||
| rejectIllegalHeader | ||
| rejectIllegalHeaderName | ||
| relaxedPathChars | ||
| relaxedQueryChars | ||
| restrictedUserAgents | ||
| sSLCACertificateFile | ||
| sSLCACertificatePath | ||
| sSLCARevocationFile | ||
| sSLCARevocationPath | ||
| sSLCertificateChainFile | ||
| sSLCertificateFile | ||
| sSLCertificateKeyFile | ||
| sSLCipherSuite | ||
| sSLDisableCompression | ||
| sSLDisableSessionTickets | ||
| sSLEnabled | ||
| sSLHonorCipherOrder | ||
| sSLPassword | ||
| sSLProtocol | ||
| sSLVerifyClient | ||
| sSLVerifyDepth | ||
| secure | ||
| selectorTimeout | ||
| sendReasonPhrase | ||
| sendfileSupported | ||
| server | ||
| serverRemoveAppProvidedValues | ||
| sessionCacheSize | ||
| sessionTimeout | ||
| sniParseLimit | ||
| soLinger | ||
| soTimeout | ||
| sslEnabledProtocols | ||
| sslImplementationName | ||
| sslProtocol | ||
| tcpNoDelay | ||
| threadPriority | ||
| trustManagerClassName | ||
| trustMaxCertLength | ||
| truststoreAlgorithm | ||
| truststoreFile | ||
| truststorePass | ||
| truststoreProvider | ||
| truststoreType | ||
| useKeepAliveResponseHeader | ||
| useSendfile | ||
| useServerCipherSuitesOrder | ||
| waitingProcessorCount | ||
| Catalina:type=Server （tomcat 本身信息）
|
address | |
| serverBuilt | tomcat 被編譯的版本 | |
| serverInfo | tomcat 名稱 | |
| serverNumber | ||
| serviceNames | ||
| shutdown | ||
| stateName | 運行狀態 | |
| Catalina:type=SocketProperties,name="http-nio-<端口>" | appReadBufSize | |
| appWriteBufSize | ||
| bufferPool | ||
| bufferPoolSize | ||
| directBuffer | ||
| directBufferPool | ||
| directSslBuffer | ||
| eventCache | ||
| processorCache | ||
| soLingerOn | ||
| soLingerTime | ||
| soTimeout | ||
| tcpNoDelay | ||
| timeoutInterval | ||
| unlockTimeout | ||
| Catalina:type=StringCache | accessCount | |
| byteEnabled | ||
| cacheSize | ||
| charEnabled | ||
| hitCount | ||
| trainThreshold | ||
| Catalina:type=ThreadPool,name="http-nio-<端口>" （Catalina:type=ThreadPool,name=*） |
acceptCount | |
| acceptorThreadCount | ||
| acceptorThreadPriority | ||
| alpnSupported | ||
| bindOnInit | ||
| connectionCount | 連接數 | |
| connectionLinger | ||
| connectionTimeout | 連接超時時間 | |
| currentThreadCount | 當前線程池中總共可用線程數 | |
| currentThreadsBusy | 當前並發正在處理的請求數 | |
| daemon | 默認 true | |
| executorTerminationTimeoutMillis | ||
| keepAliveCount | ||
| keepAliveTimeout | ||
| localPort | ||
| maxConnections | 最大連接數 | |
| maxKeepAliveRequests | ||
| maxThreads | 最大可並發處理的請求數 | |
| minSpareThreads | ||
| pollerThreadCount | ||
| pollerThreadPriority | ||
| port | tomcat 啟動端口 | |
| running | ||
| sSLEnabled | ||
| selectorTimeout | ||
| sniParseLimit | ||
| sslImplementation | ||
| sslImplementationName | ||
| tcpNoDelay | ||
| threadPriority | ||
| useInheritedChannel | ||
| useSendfile | ||
| java.lang:name=G1 Old Generation,type=GarbageCollector | CollectionCount | 從 tomcat 啟動到目前為止，垃圾回收的次數 |
| CollectionTime | 從 tomcat 啟動到目前為止，垃圾回收總共耗時時間 | |
| LastGcInfo | ||
| MemoryPoolNames | ||
| Name | ||
| Valid | ||
| java.lang:name=G1 Young Generation,type=GarbageCollector | 監控項同 “java.lang:name=G1 Old Generation,type=GarbageCollector” | |
| java.lang:type=Memory | HeapMemoryUsage | 堆內存使用情況 |
| NonHeapMemoryUsage | 非內存使用情況 | |
| java.lang:type=MemoryPool,name=CodeHeap 'non-nmethods' | PeakUsage | |
| Usage | ||
| UsageThreshold | ||
| UsageThresholdCount | ||
| UsageThresholdExceeded | ||
| UsageThresholdSupported | ||
| Type | NON_HEAP : 非堆 | |
| java.lang:type=MemoryPool,name=CodeHeap 'non-profiled nmethods' | 同 “java.lang:type=MemoryPool,name=CodeHeap 'non-nmethods'” | |
| java.lang:type=MemoryPool,name=CodeHeap 'profiled nmethods' | 同 “java.lang:type=MemoryPool,name=CodeHeap 'non-nmethods'” | |
| java.lang:type=MemoryPool,name=Compressed Class Space | 同 “java.lang:type=MemoryPool,name=CodeHeap 'non-nmethods'” | |
| java.lang:type=MemoryPool,name=G1 Eden Space | CollectionUsage | |
| CollectionUsageThreshold | ||
| CollectionUsageThresholdCount | ||
| CollectionUsageThresholdExceeded | ||
| CollectionUsageThresholdSupported | ||
| PeakUsage | ||
| Usage | ||
| Type | HEAP：堆 | |
| UsageThresholdSupported | ||
| java.lang:type=MemoryPool,name=G1 Old Gen | CollectionUsage | |
| CollectionUsageThreshold | ||
| CollectionUsageThresholdCount | ||
| CollectionUsageThresholdExceeded | ||
| CollectionUsageThresholdSupported | ||
| PeakUsage | ||
| Usage | ||
| Type | HEAP：堆 | |
| UsageThreshold | ||
| UsageThresholdCount | ||
| UsageThresholdExceeded | ||
| UsageThresholdSupported | ||
| java.lang:type=MemoryPool,name=G1 Survivor Space | 同 “java.lang:type=MemoryPool,name=G1 Eden Space” | |
| java.lang:type=MemoryPool,name=Metaspace | 同 “java.lang:type=MemoryPool,name=CodeHeap 'non-nmethods'” | |
| java.lang:type=OperatingSystem | Arch | |
| AvailableProcessors | 系統中 CPU 核數 | |
| CommittedVirtualMemorySize | ||
| FreePhysicalMemorySize | ||
| FreeSwapSpaceSize | ||
| MaxFileDescriptorCount | ||
| Name | 操作系統名稱 | |
| OpenFileDescriptorCount | ||
| ProcessCpuLoad | ||
| ProcessCpuTime | ||
| SystemCpuLoad | ||
| SystemLoadAverage | ||
| TotalPhysicalMemorySize | ||
| TotalSwapSpaceSize | ||
| Version | 操作系統版本 | |
| java.lang:type=Runtime | BootClassPathSupported | |
| ClassPath | tomcat 運行時的 classpath | |
| InputArguments | 設置給 tomcat 的 jvm 參數 | |
| LibraryPath | ||
| ManagementSpecVersion | ||
| Name | PID + 系統的 hostname | |
| Pid | tomcat 進程號 | |
| SpecName | 如：Java Virtual Machine Specification | |
| SpecVendor | 如：Oracle Corporation | |
| SpecVersion | 如：11 | |
| StartTime | tomcat 啟動時間，單位 毫秒 | |
| SystemProperties | ||
| Uptime | tomcat 持續運行時間，單位毫秒 | |
| VmName | 如：OpenJDK 64-Bit Server VM | |
| VmVendor | 如：Oracle Corporation | |
| VmVersion | 如：11.0.5+10-LTS | |
| java.lang:type=Threading | AllThreadIds | 活動的線程Id ，是一個 long 類型的數組 |
| CurrentThreadCpuTime | ||
| CurrentThreadCpuTimeSupported | ||
| CurrentThreadUserTime | ||
| DaemonThreadCount | 守護線程數 | |
| ObjectMonitorUsageSupported | ||
| PeakThreadCount | 實時峰值 | |
| SynchronizerUsageSupported | ||
| ThreadAllocatedMemoryEnabled | ||
| ThreadAllocatedMemorySupported | ||
| ThreadContentionMonitoringEnabled | ||
| ThreadContentionMonitoringSupported | ||
| ThreadCount | 活動的線程數 | |
| ThreadCpuTimeEnabled | ||
| ThreadCpuTimeSupported | ||
| TotalStartedThreadCount | 已啟動的總數 | |
| java.nio:name=direct,type=BufferPool | Count | |
| MemoryUsed | ||
| TotalCapacity | ||
| java.nio:name=mapped,type=BufferPool | Count | |
| MemoryUsed | ||
| TotalCapacity | ||
| java.lang:type=ClassLoading | LoadedClassCount | 已載入類數 |
| TotalLoadedClassCount | 總共載入的類數量 | |
| UnloadedClassCount | 已卸載的類數量 | |
這個是各個 webapp 應用可監控的指標。
二、開啟 tomcat jmx 監控
1、在 tomcat jvm 參數中配置 jmx 參數
1） 查看 tomcat 的啟動腳本，閱讀腳本內容，查看該腳本中設置jvm參數是哪里，在其中加上 jmx 參數：
-Dcom.sun.management.jmxremote -Djava.rmi.server.hostname=192.168.23.1 -Dcom.sun.management.jmxremote.port=9999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false
其中：
hostname 是你要查看的遠程服務器的真實IP
port 是遠程服務上 tomcat 要開啟的 jmx 端口，這個端口只要選擇服務器上沒有被占用的端口即可。
一般上述內容加入： 進入Tomcat/bin目錄，修改catalina.sh，找到如下內容 “#—–Execute The Requested Command”
2） 重啟 tomcat
3） 使用 ps -ef|grep tomcat 查下 tomcat 進程，看下現在其啟動參數中 jvm 參數里是否有 這個 jmx 參數
上述圖中可以看出 jvm 參數中成功加入 jmx 參數。
2、通過 jconsole
圖中的 1 處填寫 你要遠程的 tomcat 所在 IP 以及 開放的 jmx 端口；
MBean 頁 中記錄了所有 可以監控 tomcat 的監控項。
可以看到 堆內存 使用情況，其它 Tab 亦然。
其實：圖中所有 Tab (除了 Mbean) 的內容都是從 Mbean 中獲取的。
3、通過 jvisualvm 工具監控
三、集成監控軟件
1、集成 prometheus
1) 在虛擬機上安裝 prometheus 軟件
可以查看該篇博客：https://www.cnblogs.com/fatyao/p/11007357.html
2、集成 zabbix