YARN NodeManager 动态更新资源配置参数

### 1、动态更新yarn nodemanager资源分配

1、在配置目录下，增加dynamic-resources.xml配置文件，内容如下，

<configuration>
  <property>
    <name>yarn.resource.dynamic.${HOSTNAME}:45454.memory</name>
    <value>53248</value>
  </property>

  <property>
    <name>yarn.resource.dynamic.${HOSTNAME}:45454.vcores</name>
    <value>28</value>
  </property>
</configuration>

即NodeManger分配52GB内存和28 CPU cores。注意${HOSTNAME}替换为NodeManager主机名。

2、动态更新配置文件

yarn rmadmin -updateNodeResource ${HOSTNAME}:45454  53248 28

验证：

$ yarn node -status `hostname`:45454
18/08/30 22:40:42 INFO client.RMProxy: Connecting to ResourceManager at chenqun-test.com/192.168.2.2:8050
18/08/30 22:40:42 INFO client.AHSProxy: Connecting to Application History server at chenqun-test.com/192.168.2.2:10200
Node Report : 
        Node-Id : chenqun-test.com:45454
        Rack : /default-rack
        Node-State : RUNNING
        Node-Http-Address : chenqun-test.com:8042
        Last-Health-Update : Thu 30/Aug/18 10:38:44:157CST
        Health-Report : 
        Containers : 1
        Memory-Used : 4096MB
        Memory-Capacity : 53248MB
        CPU-Used : 4 vcores
        CPU-Capacity : 28 vcores
        Node-Labels : high_cpu