/*
* Copyright 2013-2020 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.cloud.netflix.eureka.server;
import java.net.URI;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import com.netflix.appinfo.AmazonInfo;
import com.netflix.appinfo.ApplicationInfoManager;
import com.netflix.appinfo.DataCenterInfo;
import com.netflix.appinfo.InstanceInfo;
import com.netflix.discovery.shared.Application;
import com.netflix.discovery.shared.Pair;
import com.netflix.eureka.EurekaServerContext;
import com.netflix.eureka.EurekaServerContextHolder;
import com.netflix.eureka.cluster.PeerEurekaNode;
import com.netflix.eureka.registry.PeerAwareInstanceRegistry;
import com.netflix.eureka.registry.PeerAwareInstanceRegistryImpl;
import com.netflix.eureka.resources.StatusResource;
import com.netflix.eureka.util.StatusInfo;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
/**
* @author Spencer Gibb
* @author Gang Li
*/
@Controller
@RequestMapping("${eureka.dashboard.path:/}")
public class EurekaController {
@Value("${eureka.dashboard.path:/}")
private String dashboardPath = "";
private ApplicationInfoManager applicationInfoManager;
public EurekaController(ApplicationInfoManager applicationInfoManager) {
this.applicationInfoManager = applicationInfoManager;
}
@RequestMapping(method = RequestMethod.GET)
public String status(HttpServletRequest request, Map<String, Object> model) {
populateBase(request, model);
populateApps(model);
StatusInfo statusInfo;
try {
statusInfo = new StatusResource().getStatusInfo();
}
catch (Exception e) {
statusInfo = StatusInfo.Builder.newBuilder().isHealthy(false).build();
}
model.put("statusInfo", statusInfo);
populateInstanceInfo(model, statusInfo);
filterReplicas(model, statusInfo);
return "eureka/status";
}
@RequestMapping(value = "/lastn", method = RequestMethod.GET)
public String lastn(HttpServletRequest request, Map<String, Object> model) {
populateBase(request, model);
PeerAwareInstanceRegistryImpl registry = (PeerAwareInstanceRegistryImpl) getRegistry();
ArrayList<Map<String, Object>> lastNCanceled = new ArrayList<>();
List<Pair<Long, String>> list = registry.getLastNCanceledInstances();
for (Pair<Long, String> entry : list) {
lastNCanceled.add(registeredInstance(entry.second(), entry.first()));
}
model.put("lastNCanceled", lastNCanceled);
list = registry.getLastNRegisteredInstances();
ArrayList<Map<String, Object>> lastNRegistered = new ArrayList<>();
for (Pair<Long, String> entry : list) {
lastNRegistered.add(registeredInstance(entry.second(), entry.first()));
}
model.put("lastNRegistered", lastNRegistered);
return "eureka/lastn";
}
private Map<String, Object> registeredInstance(String id, long date) {
HashMap<String, Object> map = new HashMap<>();
map.put("id", id);
map.put("date", new Date(date));
return map;
}
protected void populateBase(HttpServletRequest request, Map<String, Object> model) {
model.put("time", new Date());
model.put("basePath", "/");
model.put("dashboardPath",
this.dashboardPath.equals("/") ? "" : this.dashboardPath);
populateHeader(model);
populateNavbar(request, model);
}
private void populateHeader(Map<String, Object> model) {
model.put("currentTime", StatusResource.getCurrentTimeAsString());
model.put("upTime", StatusInfo.getUpTime());
model.put("environment", "N/A"); // FIXME:
model.put("datacenter", "N/A"); // FIXME:
PeerAwareInstanceRegistry registry = getRegistry();
model.put("registry", registry);
model.put("isBelowRenewThresold", registry.isBelowRenewThresold() == 1);
DataCenterInfo info = applicationInfoManager.getInfo().getDataCenterInfo();
if (info.getName() == DataCenterInfo.Name.Amazon) {
AmazonInfo amazonInfo = (AmazonInfo) info;
model.put("amazonInfo", amazonInfo);
model.put("amiId", amazonInfo.get(AmazonInfo.MetaDataKey.amiId));
model.put("availabilityZone",
amazonInfo.get(AmazonInfo.MetaDataKey.availabilityZone));
model.put("instanceId", amazonInfo.get(AmazonInfo.MetaDataKey.instanceId));
}
}
private PeerAwareInstanceRegistry getRegistry() {
return getServerContext().getRegistry();
}
private EurekaServerContext getServerContext() {
return EurekaServerContextHolder.getInstance().getServerContext();
}
private void populateNavbar(HttpServletRequest request, Map<String, Object> model) {
Map<String, String> replicas = new LinkedHashMap<>();
List<PeerEurekaNode> list = getServerContext().getPeerEurekaNodes()
.getPeerNodesView();
for (PeerEurekaNode node : list) {
try {
URI uri = new URI(node.getServiceUrl());
String href = scrubBasicAuth(node.getServiceUrl());
replicas.put(uri.getHost(), href);
}
catch (Exception ex) {
// ignore?
}
}
model.put("replicas", replicas.entrySet());
}
private void populateApps(Map<String, Object> model) {
List<Application> sortedApplications = getRegistry().getSortedApplications();
ArrayList<Map<String, Object>> apps = new ArrayList<>();
for (Application app : sortedApplications) {
LinkedHashMap<String, Object> appData = new LinkedHashMap<>();
apps.add(appData);
appData.put("name", app.getName());
Map<String, Integer> amiCounts = new HashMap<>();
Map<InstanceInfo.InstanceStatus, List<Pair<String, String>>> instancesByStatus = new HashMap<>();
Map<String, Integer> zoneCounts = new HashMap<>();
for (InstanceInfo info : app.getInstances()) {
String id = info.getId();
String url = info.getStatusPageUrl();
InstanceInfo.InstanceStatus status = info.getStatus();
String ami = "n/a";
String zone = "";
if (info.getDataCenterInfo().getName() == DataCenterInfo.Name.Amazon) {
AmazonInfo dcInfo = (AmazonInfo) info.getDataCenterInfo();
ami = dcInfo.get(AmazonInfo.MetaDataKey.amiId);
zone = dcInfo.get(AmazonInfo.MetaDataKey.availabilityZone);
}
Integer count = amiCounts.get(ami);
if (count != null) {
amiCounts.put(ami, count + 1);
}
else {
amiCounts.put(ami, 1);
}
count = zoneCounts.get(zone);
if (count != null) {
zoneCounts.put(zone, count + 1);
}
else {
zoneCounts.put(zone, 1);
}
List<Pair<String, String>> list = instancesByStatus
.computeIfAbsent(status, k -> new ArrayList<>());
list.add(new Pair<>(id, url));
}
appData.put("amiCounts", amiCounts.entrySet());
appData.put("zoneCounts", zoneCounts.entrySet());
ArrayList<Map<String, Object>> instanceInfos = new ArrayList<>();
appData.put("instanceInfos", instanceInfos);
for (Map.Entry<InstanceInfo.InstanceStatus, List<Pair<String, String>>> entry : instancesByStatus
.entrySet()) {
List<Pair<String, String>> value = entry.getValue();
InstanceInfo.InstanceStatus status = entry.getKey();
LinkedHashMap<String, Object> instanceData = new LinkedHashMap<>();
instanceInfos.add(instanceData);
instanceData.put("status", entry.getKey());
ArrayList<Map<String, Object>> instances = new ArrayList<>();
instanceData.put("instances", instances);
instanceData.put("isNotUp", status != InstanceInfo.InstanceStatus.UP);
// TODO
/*
* if(status != InstanceInfo.InstanceStatus.UP){
* buf.append("<font color=red size=+1><b>"); }
* buf.append("<b>").append(status
* .name()).append("</b> (").append(value.size()).append(") - ");
* if(status != InstanceInfo.InstanceStatus.UP){
* buf.append("</font></b>"); }
*/
for (Pair<String, String> p : value) {
LinkedHashMap<String, Object> instance = new LinkedHashMap<>();
instances.add(instance);
instance.put("id", p.first());
String url = p.second();
instance.put("url", url);
boolean isHref = url != null && url.startsWith("http");
instance.put("isHref", isHref);
/*
* String id = p.first(); String url = p.second(); if(url != null &&
* url.startsWith("http")){
* buf.append("<a href=\"").append(url).append("\">"); }else { url =
* null; } buf.append(id); if(url != null){ buf.append("</a>"); }
* buf.append(", ");
*/
}
}
// out.println("<td>" + buf.toString() + "</td></tr>");
}
model.put("apps", apps);
}
private void populateInstanceInfo(Map<String, Object> model, StatusInfo statusInfo) {
InstanceInfo instanceInfo = statusInfo.getInstanceInfo();
Map<String, String> instanceMap = new HashMap<>();
instanceMap.put("ipAddr", instanceInfo.getIPAddr());
instanceMap.put("status", instanceInfo.getStatus().toString());
if (instanceInfo.getDataCenterInfo().getName() == DataCenterInfo.Name.Amazon) {
AmazonInfo info = (AmazonInfo) instanceInfo.getDataCenterInfo();
instanceMap.put("availability-zone",
info.get(AmazonInfo.MetaDataKey.availabilityZone));
instanceMap.put("public-ipv4", info.get(AmazonInfo.MetaDataKey.publicIpv4));
instanceMap.put("instance-id", info.get(AmazonInfo.MetaDataKey.instanceId));
instanceMap.put("public-hostname",
info.get(AmazonInfo.MetaDataKey.publicHostname));
instanceMap.put("ami-id", info.get(AmazonInfo.MetaDataKey.amiId));
instanceMap.put("instance-type",
info.get(AmazonInfo.MetaDataKey.instanceType));
}
model.put("instanceInfo", instanceMap);
}
protected void filterReplicas(Map<String, Object> model, StatusInfo statusInfo) {
Map<String, String> applicationStats = statusInfo.getApplicationStats();
if (applicationStats.get("registered-replicas").contains("@")) {
applicationStats.put("registered-replicas",
scrubBasicAuth(applicationStats.get("registered-replicas")));
}
if (applicationStats.get("unavailable-replicas").contains("@")) {
applicationStats.put("unavailable-replicas",
scrubBasicAuth(applicationStats.get("unavailable-replicas")));
}
if (applicationStats.get("available-replicas").contains("@")) {
applicationStats.put("available-replicas",
scrubBasicAuth(applicationStats.get("available-replicas")));
}
model.put("applicationStats", applicationStats);
}
private String scrubBasicAuth(String urlList) {
String[] urls = urlList.split(",");
StringBuilder filteredUrls = new StringBuilder();
for (String u : urls) {
if (u.contains("@")) {
filteredUrls.append(u, 0, u.indexOf("//") + 2)
.append(u.substring(u.indexOf("@") + 1)).append(",");
}
else {
filteredUrls.append(u).append(",");
}
}
return filteredUrls.substring(0, filteredUrls.length() - 1);
}
}
