Spring Boot Admin集成利器 Arthas实践

本文转载自查看原文 2021-02-26 09:38 834

前言

Arthas 是 Alibaba 开源的 Java 诊断工具，具有实时查看系统的运行状况；查看函数调用参数、返回值和异常；在线热更新代码；秒解决类冲突问题；定位类加载路径；生成热点；通过网页诊断线上应用。如今在各大厂都有广泛应用，也延伸出很多产品。

这里将介绍如何将 Arthas 集成进 Spring Boot 监控平台中。

SpringBoot Admin

为了方便，SpringBoot Admin 简称为 SBA（版本：1.5.x）。

1.5 版本的 SBA 如果要开发插件比较麻烦，需要下载 SBA 的源码包，再按照 Spring-boot-admin-server-ui-hystrix的形式 Copy 一份,由于 JS 使用的是 Angular，本人尝试了很久，虽然掌握了如何开发插件，奈何不会 Angular，遂放弃

版本：2.x 2.x 版本的 SBA 插件开发，官网有介绍如何开发，JS 使用 Vue，方便很多，由于我们项目还在使用 1.5，所以并没有使用该版本，请读者自行尝试。

不能使用 SBA 的插件进行集成，那还有什么办法呢？

SBA 集成

鄙人的办法是将 Arthas 的相关文件直接 Copy 到 Admin 服务中，这些文件都来自 Arthas-all 项目 Tunnel-server。

admin 目录结构

1. Arthas 目录

该包下存放的是所有 Arthas 的 Java 文件。

Endpoint 包下的文件可以都注释掉，没多大用。
ArthasController 这个文件是我自己新建的，用来获取所有注册到 Arthas 的客户端，这在后面是有用的。
其他文件直接 Copy 过来就行。

@RequestMapping("/api/arthas") @RestController public class ArthasController { @Autowired private TunnelServer tunnelServer; @RequestMapping(value = "/clients", method = RequestMethod.GET) public Set<String> getClients() { Map<String, AgentInfo> agentInfoMap = tunnelServer.getAgentInfoMap(); return agentInfoMap.keySet(); } }

spring-boot-admin-server-ui

该文件建在 Resources.META-INF 下，Admin 会在启动的时候加载该目录下的文件。

2. Resources 目录

index.html 覆盖 SBA 原来的首页，在其中添加一个 Arthas 导航

<!DOCTYPE html> <html class="no-js"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>Spring Boot Admin</title> <meta name="description" content=""> <meta name="viewport" content="width=device-width"> <link rel="shortcut icon" type="image/x-icon" href="img/favicon.png"/> <link rel="stylesheet" type="text/css" href="core.css"/> <link rel="stylesheet" type="text/css" href="all-modules.css"/> </head> <body> <header class="navbar header--navbar desktop-only"> <div class="navbar-inner"> <div class="container-fluid"> <div class="spring-logo--container"> <a class="spring-logo" href="#"><span></span></a> </div> <div class="spring-logo--container"> <a class="spring-boot-logo" href="#"><span></span></a> </div> <ul class="nav pull-right"> <!--增加Arthas导航--> <li class="navbar-link ng-scope"> <a class="ng-binding" href="arthas/arthas.html">Arthas</a> </li> <li ng-repeat="view in mainViews" class="navbar-link" ng-class="{active: $state.includes(view.state)}"> <a ui-sref="{{view.state}}" ng-bind-html="view.title"></a> </li> </ul> </div> </div> </header> <div ui-view></div> <footer class="footer"> <ul class="inline"> <li><a href="https://codecentric.github.io/spring-boot-admin/@project.version@" target="_blank">Reference Guide</a></li> <li>-</li> <li><a href="https://github.com/codecentric/spring-boot-admin" target="_blank">Sources</a></li> <li>-</li> <li>Code licensed under <a href="http://www.apache.org/licenses/LICENSE-2.0" target="_blank">Apache License 2.0</a></li> </ul> </footer> <script src="dependencies.js" type="text/javascript"></script> <script type="text/javascript"> sbaModules = []; </script> <script src="core.js" type="text/javascript"></script> <script src="all-modules.js" type="text/javascript"></script> <script type="text/javascript"> angular.element(document).ready(function () { angular.bootstrap(document, sbaModules.slice(0), { strictDi: true }); }); </script> </body> </html>

Arthas.html

新建页面，用于显示 Arthas 控制台页面。

这个文件中有两个隐藏文本域，这两个用于连接 Arthas 服务端，在页面加载的时候会自动将 Admin 的 Url 赋值给 Ip。

<input type="hidden" id="ip" name="ip" value="127.0.0.1"> <input type="hidden" id="port" name="port" value="19898">

<!DOCTYPE html> <html class="no-js"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>Spring Boot Admin</title> <meta name="description" content=""> <meta name="viewport" content="width=device-width"> <link rel="shortcut icon" type="image/x-icon" href="../img/favicon.png"/> <link rel="stylesheet" type="text/css" href="../core.css"/> <link rel="stylesheet" type="text/css" href="../all-modules.css"/> <script src="js/jquery-3.3.1.min.js"></script> <script src="js/popper-1.14.6.min.js"></script> <script src="js/xterm.js"></script> <script src="js/web-console.js"></script> <script src="js/arthas.js"></script> <link href="js/xterm.css" rel="stylesheet" /> <script type="text/javascript"> window.addEventListener('resize', function () { var terminalSize = getTerminalSize(); ws.send(JSON.stringify({ action: 'resize', cols: terminalSize.cols, rows: terminalSize.rows })); xterm.resize(terminalSize.cols, terminalSize.rows); }); </script> </head> <body> <header class="navbar header--navbar desktop-only"> <div class="navbar-inner"> <div class="container-fluid"> <div class="spring-logo--container"> <a class="spring-logo" href="#"><span></span></a> </div> <div class="spring-logo--container"> <a class="spring-boot-logo" href="#"><span></span></a> </div> <ul class="nav pull-right"> <li class="navbar-link ng-scope"> <a class="ng-binding" href="arthas.html">Arthas</a> </li> <li class="navbar-link ng-scope"> <a class="ng-binding" href="../">Applications</a> </li> <li class="navbar-link ng-scope"> <a class="ng-binding" href="../#/turbine">Turbine</a> </li> <li class="navbar-link ng-scope"> <a class="ng-binding" href="../#/events">Journal</a> </li> <li class="navbar-link ng-scope"> <a class="ng-binding" href="../#/about">About</a> </li> <li class="navbar-link ng-scope"> <a class="ng-binding" href="../#/logout"><i class="fa fa-2x fa-sign-out" aria-hidden="true"></i></a> </li> </ul> </div> </div> </header> <div ui-view> <div class="container-fluid"> <form class="form-inline"> <input type="hidden" id="ip" name="ip" value="127.0.0.1"> <input type="hidden" id="port" name="port" value="19898"> Select Application： <select id="selectServer"></select> <button class="btn" onclick="startConnect()" type="button"><i class="fa fa-connectdevelop"></i> Connect</button> <button class="btn" onclick="disconnect()" type="button"><i class="fa fa-search-minus"></i> Disconnect</button> <button class="btn" onclick="release()" type="button"><i class="fa fa-search-minus"></i> Release</button> </form> <div id="terminal-card"> <div id="terminal"></div> </div> </div> </div> </body> </html>

Arthas.js 存储页面控制的 js

var registerApplications = null; var applications = null; $(document).ready(function () { reloadRegisterApplications(); reloadApplications(); }); /** * 获取注册的arthas客户端 */ function reloadRegisterApplications() { var result = reqSync("/api/arthas/clients", "get"); registerApplications = result; initSelect("#selectServer", registerApplications, ""); } /** * 获取注册的应用 */ function reloadApplications() { applications = reqSync("/api/applications", "get"); console.log(applications) } /** * 初始化下拉选择框 */ function initSelect(uiSelect, list, key) { $(uiSelect).html(''); var server; for (var i = 0; i < list.length; i++) { server = list[i].toLowerCase().split("@"); if ("phantom-admin" === server[0]) continue; $(uiSelect).append("<option value=" + list[i].toLowerCase() + ">" + server[0] + "</option>"); } } /** * 重置配置文件 */ function release() { var currentServer = $("#selectServer").text(); for (var i = 0; i < applications.length; i++) { serverId = applications[i].id; serverName = applications[i].name.toLowerCase(); console.log(serverId + "/" + serverName); if (currentServer === serverName) { var result = reqSync("/api/applications/" +serverId+ "/env/reset", "post"); alert("env reset success"); } } } function reqSync(url, method) { var result = null; $.ajax({ url: url, type: method, async: false, //使用同步的方式,true为异步方式 headers: { 'Content-Type': 'application/json;charset=utf8;', }, success: function (data) { // console.log(data); result = data; }, error: function (data) { console.log("error"); } }); return result; }

Web-console.js

修改了连接部分代码，参考一下。

var ws; var xterm; /**有修改**/ $(function () { var url = window.location.href; var ip = getUrlParam('ip'); var port = getUrlParam('port'); var agentId = getUrlParam('agentId'); if (ip != '' && ip != null) { $('#ip').val(ip); } else { $('#ip').val(window.location.hostname); } if (port != '' && port != null) { $('#port').val(port); } if (agentId != '' && agentId != null) { $('#selectServer').val(agentId); } // startConnect(true); }); /** get params in url **/ function getUrlParam (name, url) { if (!url) url = window.location.href; name = name.replace(/[\[\]]/g, '\\$&'); var regex = new RegExp('[?&]' + name + '(=([^&#]*)|&|#|$)'), results = regex.exec(url); if (!results) return null; if (!results[2]) return ''; return decodeURIComponent(results[2].replace(/\+/g, ' ')); } function getCharSize () { var tempDiv = $('<div />').attr({'role': 'listitem'}); var tempSpan = $('<div />').html('qwertyuiopasdfghjklzxcvbnm'); tempDiv.append(tempSpan); $("html body").append(tempDiv); var size = { width: tempSpan.outerWidth() / 26, height: tempSpan.outerHeight(), left: tempDiv.outerWidth() - tempSpan.outerWidth(), top: tempDiv.outerHeight() - tempSpan.outerHeight(), }; tempDiv.remove(); return size; } function getWindowSize () { var e = window; var a = 'inner'; if (!('innerWidth' in window )) { a = 'client'; e = document.documentElement || document.body; } var terminalDiv = document.getElementById("terminal-card"); var terminalDivRect = terminalDiv.getBoundingClientRect(); return { width: terminalDivRect.width, height: e[a + 'Height'] - terminalDivRect.top }; } function getTerminalSize () { var charSize = getCharSize(); var windowSize = getWindowSize(); console.log('charsize'); console.log(charSize); console.log('windowSize'); console.log(windowSize); return { cols: Math.floor((windowSize.width - charSize.left) / 10), rows: Math.floor((windowSize.height - charSize.top) / 17) }; } /** init websocket **/ function initWs (ip, port, agentId) { var protocol= location.protocol === 'https:' ? 'wss://' : 'ws://'; var path = protocol + ip + ':' + port + '/ws?method=connectArthas&id=' + agentId; ws = new WebSocket(path); } /** init xterm **/ function initXterm (cols, rows) { xterm = new Terminal({ cols: cols, rows: rows, screenReaderMode: true, rendererType: 'canvas', convertEol: true }); } /** 有修改 begin connect **/ function startConnect (silent) { var ip = $('#ip').val(); var port = $('#port').val(); var agentId = $('#selectServer').val(); if (ip == '' || port == '') { alert('Ip or port can not be empty'); return; } if (agentId == '') { if (silent) { return; } alert('AgentId can not be empty'); return; } if (ws != null) { alert('Already connected'); return; } // init webSocket initWs(ip, port, agentId); ws.onerror = function () { ws.close(); ws = null; !silent && alert('Connect error'); }; ws.onclose = function (message) { if (message.code === 2000) { alert(message.reason); } }; ws.onopen = function () { console.log('open'); $('#fullSc').show(); var terminalSize = getTerminalSize() console.log('terminalSize') console.log(terminalSize) // init xterm initXterm(terminalSize.cols, terminalSize.rows) ws.onmessage = function (event) { if (event.type === 'message') { var data = event.data; xterm.write(data); } }; xterm.open(document.getElementById('terminal')); xterm.on('data', function (data) { ws.send(JSON.stringify({action: 'read', data: data})) }); ws.send(JSON.stringify({action: 'resize', cols: terminalSize.cols, rows: terminalSize.rows})); window.setInterval(function () { if (ws != null && ws.readyState === 1) { ws.send(JSON.stringify({action: 'read', data: ""})); } }, 30000); } } function disconnect () { try { ws.close(); ws.onmessage = null; ws.onclose = null; ws = null; xterm.destroy(); $('#fullSc').hide(); alert('Connection was closed successfully!'); } catch (e) { alert('No connection, please start connect first.'); } } /** full screen show **/ function xtermFullScreen () { var ele = document.getElementById('terminal-card'); requestFullScreen(ele); } function requestFullScreen (element) { var requestMethod = element.requestFullScreen || element.webkitRequestFullScreen || element.mozRequestFullScreen || element.msRequestFullScreen; if (requestMethod) { requestMethod.call(element); } else if (typeof window.ActiveXObject !== "undefined") { var wscript = new ActiveXObject("WScript.Shell"); if (wscript !== null) { wscript.SendKeys("{F11}"); } } }

其他文件jquery-3.3.1.min.js 新加 Jscopy 过来的 jspopper-1.14.6.min.jsweb-console.jsxterm.cssxterm.js
bootstrap.yml

# arthas端口 arthas: server: port: 9898

这样子，admin 端的配置完成了。

客户端配置

在配置中心加入配置

#arthas服务端域名 arthas.tunnel-server = ws://admin域名/ws #客户端id,应用名@随机值，js会截取前面的应用名 arthas.agent-id = ${spring.application.name}@${random.value} #arthas开关，可以在需要调式的时候开启，不需要的时候关闭 spring.arthas.enabled = false

需要自动 Attach 的应用中引入 Arthas-spring-boot-starter 需要对 Starter 进行部分修改，要将注册 Arthas 的部分移除，下面是修改后的文件。

这里是将修改后的文件重新打包成 Jar 包，上传到私服，但有些应用会有无法加载 ArthasConfigMap 的情况，可以将这两个文件单独放到项目的公共包中。

@EnableConfigurationProperties({ ArthasProperties.class }) public class ArthasConfiguration { private static final Logger logger = LoggerFactory.getLogger(ArthasConfiguration.class); @ConfigurationProperties(prefix = "arthas") @ConditionalOnMissingBean @Bean public HashMap<String, String> arthasConfigMap() { return new HashMap<String, String>(); } }

@ConfigurationProperties(prefix = "arthas") public class ArthasProperties { private String ip; private int telnetPort; private int httpPort; private String tunnelServer; private String agentId; /** * report executed command */ private String statUrl; /** * session timeout seconds */ private long sessionTimeout; private String home; /** * when arthas agent init error will throw exception by default. */ private boolean slientInit = false; public String getHome() { return home; } public void setHome(String home) { this.home = home; } public boolean isSlientInit() { return slientInit; } public void setSlientInit(boolean slientInit) { this.slientInit = slientInit; } public String getIp() { return ip; } public void setIp(String ip) { this.ip = ip; } public int getTelnetPort() { return telnetPort; } public void setTelnetPort(int telnetPort) { this.telnetPort = telnetPort; } public int getHttpPort() { return httpPort; } public void setHttpPort(int httpPort) { this.httpPort = httpPort; } public String getTunnelServer() { return tunnelServer; } public void setTunnelServer(String tunnelServer) { this.tunnelServer = tunnelServer; } public String getAgentId() { return agentId; } public void setAgentId(String agentId) { this.agentId = agentId; } public String getStatUrl() { return statUrl; } public void setStatUrl(String statUrl) { this.statUrl = statUrl; } public long getSessionTimeout() { return sessionTimeout; } public void setSessionTimeout(long sessionTimeout) { this.sessionTimeout = sessionTimeout; } }

实现开关效果

为了实现开关效果，还需要一个文件用来监听配置文件的改变。

我这里使用的是在 SBA 中改变环境变量，对应服务监听到变量改变，当监听 spring.arthas.enabled 为 true 的时候，注册 Arthas，到下面是代码。

@Component public class EnvironmentChangeListener implements ApplicationListener<EnvironmentChangeEvent> { @Autowired private Environment env; @Autowired private Map<String, String> arthasConfigMap; @Autowired private ArthasProperties arthasProperties; @Autowired private ApplicationContext applicationContext; @Override public void onApplicationEvent(EnvironmentChangeEvent event) { Set<String> keys = event.getKeys(); for (String key : keys) { if ("spring.arthas.enabled".equals(key)) { if ("true".equals(env.getProperty(key))) { registerArthas(); } } } } private void registerArthas() { DefaultListableBeanFactory defaultListableBeanFactory = (DefaultListableBeanFactory) applicationContext.getAutowireCapableBeanFactory(); String bean = "arthasAgent"; if (defaultListableBeanFactory.containsBean(bean)) { ((ArthasAgent)defaultListableBeanFactory.getBean(bean)).init(); return; } defaultListableBeanFactory.registerSingleton(bean, arthasAgentInit()); } private ArthasAgent arthasAgentInit() { arthasConfigMap = StringUtils.removeDashKey(arthasConfigMap); // 给配置全加上前缀 Map<String, String> mapWithPrefix = new HashMap<String, String>(arthasConfigMap.size()); for (Map.Entry<String, String> entry : arthasConfigMap.entrySet()) { mapWithPrefix.put("arthas." + entry.getKey(), entry.getValue()); } final ArthasAgent arthasAgent = new ArthasAgent(mapWithPrefix, arthasProperties.getHome(), arthasProperties.isSlientInit(), null); arthasAgent.init(); return arthasAgent; } }

结束

到此可以愉快的在 SBA 中调式应用了，看看最后的页面。

调式流程

流程如下：

开启 Arthas
在 Select Application 中选择应用
Connect 连接应用
DisConnect 断开应用
Release 释放配置文件

一些缺陷：

使用 jar 包的方式引入应用，具有一定的侵略性，如果 Arthas 无法启动，会导致应用也无法启动。
如果使用 Docker，需要适当调整 JVM 内存，防止开启 Arthas、调试的时候，内存炸了。
没有使用 SBA 插件的方式集成如上集成仅供参考，请根据自己企业的情况来集成。

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