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  1. Modify the metainfo.xml

    Code Block
                    <component>
                    <name>SAMPLESRV_CLIENT</name>
                    <displayName>Sample Srv Client</displayName>
                    <category>CLIENT</category>
                    <cardinality>1+</cardinality>
                    <commandScript>
                        <script>scripts/sample_client.py</script>
                        <scriptType>PYTHON</scriptType>
                        <timeout>600</timeout>
                    </commandScript>
                    <configFiles>
                      <configFile>
                        <type>xml</type>
                        <fileName>test-config.xml</fileName>
                        <dictionaryName>test-config</dictionaryName>
                      </configFile>
                    </configFiles>
                </component>

  2. Create a directory for the configuration dictionary file SAMPLESRV/configuration.

    Code Block
    mkdir -p configuration
cd configuration

  3. Create the test-config.xml file. For example:

    Code Block
    <?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<configuration>
  <property>
    <name>some.test.property</name>
    <value>this.is.the.default.value</value>
    <description>This is a test description.</description>
  </property>
  <property>
    <name>another.test.property</name>
    <value>5</value>
    <description>This is a second test description.</description>
  </property>
</configuration>

  4. There is an optional setting "configuration-dir".  Custom services should either not include the setting or should leave it as the default value "configuration".

     

    Code Block
    <configuration-dir>configuration</configuration-dir>
  5. Configuration dependencies can be included in the metainfo.xml in the a "configuration-dependencies" section.  This section can be added to the service as a whole or a particular component. One of the implications of this dependency is that whenever the config-type is updated, Ambari automatically marks the component or service as requiring restart.
    Code Block
          <configuration-dependencies>
        <config-type>core-site</config-type>
        <config-type>hdfs-site</config-type>
      </configuration-dependencies>

     

     

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