hadop 查看DataNode的资源使用情况信息（web接口）

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1.概述

2. 配置

3. 实例

自己搭建一个hadoop本地集群后，访问
http://localhost:8088/ws/v1/cluster/metrics

<?xml version="1.0" encoding="utf-8"?>

<clusterMetrics> 
  <appsSubmitted>0</appsSubmitted>  
  <appsCompleted>0</appsCompleted>  
  <appsPending>0</appsPending>  
  <appsRunning>0</appsRunning>  
  <appsFailed>0</appsFailed>  
  <appsKilled>0</appsKilled>  
  <reservedMB>0</reservedMB>  
  <availableMB>8192</availableMB>  
  <allocatedMB>0</allocatedMB>  
  <reservedVirtualCores>0</reservedVirtualCores>  
  <availableVirtualCores>8</availableVirtualCores>  
  <allocatedVirtualCores>0</allocatedVirtualCores>  
  <containersAllocated>0</containersAllocated>  
  <containersReserved>0</containersReserved>  
  <containersPending>0</containersPending>  
  <totalMB>8192</totalMB>  
  <totalVirtualCores>8</totalVirtualCores>  
  <totalNodes>1</totalNodes>  
  <lostNodes>0</lostNodes>  
  <unhealthyNodes>0</unhealthyNodes>  
  <decommissionedNodes>0</decommissionedNodes>  
  <rebootedNodes>0</rebootedNodes>  
  <activeNodes>1</activeNodes> 
</clusterMetrics>