转自：[https://blog.csdn.net/u013595419/article/details/79140654](https://blog.csdn.net/u013595419/article/details/79140654)  
有修改。

# 一、正文

## Services 目录结构

```bash
[root@manager SAMPLESRV]# pwd
/var/lib/ambari-server/resources/stacks/HDP/3.1/services/SAMPLESRV
[root@manager SAMPLESRV]# tree
.
├── configuration
│   └── scrapy-config.xml
├── metainfo.xml
├── package
│   └── scripts
│       ├── master.py
│       ├── sample_client.py
│       └── slave.py
└── quicklinks
    └── quicklinks.json
```

## metainfo.xml

中添加configuration-dependencies属性

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

## scrapy-config.xml

```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 SAMPLESRV，重新添加 SAMPLESRV 这个Service，安装完成后便可以看到配置中的配置选项了。

![img](../../../../../ff_internal_upload/img/2020/image-20201114155357981.png)

# 二、问题与解决方法

## 2.1 can't start with home(s)

directory(ies) 类型变量，如果参数值以 /home 或者 /homes 开头，Ambari识别为非法路径。

解决方法：

```js
[root@manager SAMPLESRV]# vim /usr/lib/ambari-server/web/javascripts/app.js
  isAllowedDir: function isAllowedDir(value) {
    var dirs = value.replace(/,/g, ' ').trim().split(new RegExp("\\s+", "g"));
    for (var i = 0; i < dirs.length; i++) {
      if (dirs[i].startsWith('/home') || dirs[i].startsWith('/homes')) {
        return false;
      }
    }
    return true;
  },
```

修改以上函数，直接返回true即可，当然也可以根据自己实际需求修改。

对应到源代码应该修改：

> ambari/ambari-web/public-static/javascripts/app.js


# 三、参考

- [AMBARI-Enhanced Configs](https://cwiki.apache.org/confluence/display/AMBARI/Enhanced+Configs)
- [Configuration support in Ambari](https://cwiki.apache.org/confluence/display/AMBARI/Configuration+support+in+Ambari)
- [为Ambari自定义Service添加配置项](https://blog.csdn.net/u013595419/article/details/79140654)
- [Ambari集成组件的方法](https://www.jianshu.com/p/96271bccb6bc)