为Ambari自定义Service添加配置项

Service 目录结构

[root@manager SAMPLESRV]# pwd
/var/lib/ambari-server/resources/stacks/FSDP/2.5/services/SAMPLESRV
[root@manager SAMPLESRV]# tree
.
├── configuration
│   └── scrapy-config.xml
├── metainfo.xml
├── package
│   └── scripts
│       ├── master.py
│       ├── sample_client.py
│       └── slave.py
└── quicklinks
    └── quicklinks.json

在metainfo.xml中添加configuration-dependencies属性

            <configuration-dependencies>
                <config-type>scrapy-config</config-type>
            </configuration-dependencies>
            <restartRequiredAfterChange>true</restartRequiredAfterChange>

该属性与为Ambari自定义Service添加QuickLink一节中给出的xml文件的quickLinksConfigurations属性是并列关系，即在service属性内部。

scrapy-config.xml

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

<configuration>

  <property>
    <name>scrapy.bot.name</name>
    <value>sina</value>
    <description>Scrapy bot's name</description>
  </property>

  <property>
    <name>scrapy.spider.modules</name>
    <value>sina.spiders</value>
    <description>sina's spider modules</description>
  </property>

  <property>
    <name>scrapy.robotstxt.obey</name>
    <value>False</value>
    <description>Whether oderby robots protocol</description>
  </property>

</configuration>

为了能够让新添加的配置文件生效，在Ambari Web页面中删除掉现有的New Sample Service，接着按照为Ambari添加新的Service给出的方法，重新添加New Sample Service这个Service，安装完成后便可以看到配置中的配置选项了。

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扩展阅读

Enhanced Configs