大数据Ambari自定义服务详细介绍一、背景知识介绍二、准备工作三、添加新服务（以 DEMO 为例）四、DEMO 结果展示

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1．Ambari：存放 ambari server, ambari agent, 和相关监控软件
2．HDP：存放 stack 软件包
3.HDP-UTILS：存放安装 Ambari 和 HDP 的公用包，例如：Ganglia, Nagios, Snappy, Rrd 等
4.EPEL：存放企业版本 Linux 所需的额外包，此外还有安装 Ambari 时需要的额外包。

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<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>demo.name</name>
<value>hello world</value>
<description>This is a name</description>
</property>
</configuration>

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<metainfo>
    <versions>
    <active>true</active>
    </versions>
    <extends>2.1</extends>
</metainfo>

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

<metainfo> 
  <schemaVersion>2.0</schemaVersion>  
  <services> 
    <service> 
      <name>DEMO</name>  
      <displayName>DEMO</displayName>  
      <comment>hello world</comment>  
      <version>1.0.0</version>  
      <components> 
        <component> 
          <name>DEMO_MASTER</name>  
          <displayName>helloworld Master</displayName>  
          <category>MASTER</category>  
          <cardinality>1</cardinality>  
          <commandScript> 
            <script>scripts/master.py</script>  
            <scriptType>PYTHON</scriptType>  
            <timeout>600</timeout> 
          </commandScript> 
        </component>  
        <component> 
          <name>DEMO_SLAVE</name>  
          <displayName>helloworld Slave</displayName>  
          <category>SLAVE</category>  
          <cardinality>1+</cardinality>  
          <commandScript> 
            <script>scripts/slave.py</script>  
            <scriptType>PYTHON</scriptType>  
            <timeout>600</timeout> 
          </commandScript> 
        </component>  
        <component> 
          <name>DEMO_CLIENT</name>  
          <displayName>helloworld client</displayName>  
          <category>CLIENT</category>  
          <cardinality>1+</cardinality>  
          <commandScript> 
            <script>scripts/client.py</script>  
            <scriptType>PYTHON</scriptType>  
            <timeout>600</timeout> 
          </commandScript>  
          <customCommands> 
            <customCommand> 
              <name>DECOMMISSION</name>  
              <commandScript> 
                <script>scripts/resourcemanager.py</script>  
                <scriptType>PYTHON</scriptType>  
                <timeout>600</timeout> 
              </commandScript> 
            </customCommand> 
          </customCommands> 
        </component> 
      </components>  
      <requiredServices> 
        <service>MAPREDUCE</service>  
        <service>ZOOKEEPER</service> 
      </requiredServices>  
      <osSpecifics> 
        <osSpecific> 
          <osFamily>redhat5,redhat6,suse11</osFamily>  
          <packages> 
            <package> 
              <name>helloworld</name> 
            </package> 
          </packages> 
        </osSpecific> 
      </osSpecifics> 
    </service> 
  </services> 
</metainfo>

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import sys import os
from resource_management import * class Master(Script):

def install(self, env): 
    self.install_packages(env)

def start(self, env):
    print 'start the helloworld';
    val= os.system("/usr/bin/helloworld") print val

def configure(self, env):
   print 'Configure the config client';

def stop(self, env):
   print 'Stop the helloworld';

def status(self, env):


print 'Status of the Demo Master';

if _name_ == " main ": 
     Master().execute()