Ambari的metainfo.xml详解（翻译）

metainfo.xml定义了Ambari管理Service的一些配置内容，该文件对应Service定义起着至关重要的作用。

结构

一级结构

service/components

service/osSpecifics

service/component/dependencies/dependency

<dependency>
  <name>HDFS/ZKFC</name>
  <scope>cluster</scope>
  <auto-deploy>
    <enabled>false</enabled>
  </auto-deploy>
  <conditions>
    <condition xsi:type="propertyExists">
      <configType>hdfs-site</configType>
      <property>dfs.nameservices</property>
    </condition>
  </conditions>
</dependency>

service/component/commandScript

示例：

<commandScript>
  <script>scripts/service_check.py</script>
  <scriptType>PYTHON</scriptType>
  <timeout>300</timeout>
</commandScript>

service/component/logs

<log>
  <logId>hdfs_namenode</logId>
  <primary>true</primary>
</log>

service/component/customCommand

参考service/component/commandScript

service/component/configFiles

metainfo.xml示例

<metainfo>
  <schemaVersion>2.0</schemaVersion>
  <services>
    <service>
      <name>HBASE</name>
      <displayName>HBase</displayName>
      <comment>Non-relational distributed database and centralized service for configuration management &amp;
 synchronization
      </comment>
      <version>0.96.0.2.0</version>
      <components>
        <component>
          <name>HBASE_MASTER</name>
          <displayName>HBase Master</displayName>
          <category>MASTER</category>
          <cardinality>1+</cardinality>
          <versionAdvertised>true</versionAdvertised>
          <timelineAppid>HBASE</timelineAppid>
          <dependencies>
            <dependency>
              <name>HDFS/HDFS_CLIENT</name>
              <scope>host</scope>
              <auto-deploy>
                <enabled>true</enabled>
              </auto-deploy>
            </dependency>
            <dependency>
              <name>ZOOKEEPER/ZOOKEEPER_SERVER</name>
              <scope>cluster</scope>
              <auto-deploy>
                <enabled>true</enabled>
                <co-locate>HBASE/HBASE_MASTER</co-locate>
              </auto-deploy>
            </dependency>
          </dependencies>
          <commandScript>
            <script>scripts/hbase_master.py</script>
            <scriptType>PYTHON</scriptType>
            <timeout>1200</timeout>
          </commandScript>
          <customCommands>
            <customCommand>
              <name>DECOMMISSION</name>
              <commandScript>
                <script>scripts/hbase_master.py</script>
                <scriptType>PYTHON</scriptType>
                <timeout>600</timeout>
              </commandScript>
            </customCommand>
          </customCommands>
        </component>

        <component>
          <name>HBASE_REGIONSERVER</name>
          <displayName>RegionServer</displayName>
          <category>SLAVE</category>
          <cardinality>1+</cardinality>
          <versionAdvertised>true</versionAdvertised>
          <timelineAppid>HBASE</timelineAppid>
          <commandScript>
            <script>scripts/hbase_regionserver.py</script>
            <scriptType>PYTHON</scriptType>
          </commandScript>
        </component>

        <component>
          <name>HBASE_CLIENT</name>
          <displayName>HBase Client</displayName>
          <category>CLIENT</category>
          <cardinality>1+</cardinality>
          <versionAdvertised>true</versionAdvertised>
          <commandScript>
            <script>scripts/hbase_client.py</script>
            <scriptType>PYTHON</scriptType>
          </commandScript>
          <configFiles>
            <configFile>
              <type>xml</type>
              <fileName>hbase-site.xml</fileName>
              <dictionaryName>hbase-site</dictionaryName>
            </configFile>
            <configFile>
              <type>env</type>
              <fileName>hbase-env.sh</fileName>
              <dictionaryName>hbase-env</dictionaryName>
            </configFile>
          </configFiles>
        </component>
      </components>

      <osSpecifics>
        <osSpecific>
          <osFamily>any</osFamily>
          <packages>
            <package>
              <name>hbase</name>
            </package>
          </packages>
        </osSpecific>
      </osSpecifics>

      <commandScript>
        <script>scripts/service_check.py</script>
        <scriptType>PYTHON</scriptType>
        <timeout>300</timeout>
      </commandScript>
      
      <requiredServices>
        <service>ZOOKEEPER</service>
        <service>HDFS</service>
      </requiredServices>

      <configuration-dependencies>
        <config-type>core-site</config-type>
        <config-type>hbase-site</config-type>
        <config-type>ranger-hbase-policymgr-ssl</config-type>
        <config-type>ranger-hbase-security</config-type>
      </configuration-dependencies>

    </service>
  </services>
</metainfo>

参考：

• 源文档： https://cwiki.apache.org/confluence/display/AMBARI/Writing+metainfo.xml