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https://issues.apache.org/jira/browse/HADOOP-9562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13660935#comment-13660935
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Trevor Lorimer commented on HADOOP-9562:
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Hi, just to clarify what I was proposing.
All I intend to do is simply serve up all the data currently displayed on the
dfshealth jsp page, using only REST GETs, providing both XML and JSON
responses.
This stems from needing to present the data on a new UI from a different server.
This would be following the same rationale behind the REST APIs of Resource
Manager, Node Manager, Application Manager and History Server
http://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html
An example REST GET from http://localhost:50070/hdfs/v1/header would return:
header: {
role: "NameNode"
state: "active"
hostAndPort: "localhost:8020"
securityEnabled: false
}
this would correspond to "NameNode 'localhost:8020' (active)" displayed on the
dfshealth jsp page.
> Create REST interface for HDFS health data
> ------------------------------------------
>
> Key: HADOOP-9562
> URL: https://issues.apache.org/jira/browse/HADOOP-9562
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 2.0.4-alpha
> Reporter: Trevor Lorimer
> Priority: Minor
>
> The HDFS health screen (dfshealth.jsp) displays basic Version, Security and
> Health information concerning the NameNode, currently this information is
> accessible from classes in the org.apache.hadoop,hdfs.server.namenode package
> and cannot be accessed outside the NameNode. This becomes prevalent if the
> data is required to be displayed using a new user interface.
> The proposal is to create a REST interface to expose all the information
> displayed on dfshealth.jsp using GET methods. Wrapper classes will be created
> to serve the data to the REST root resource within the hadoop-hdfs project.
> This will enable the HDFS health screen information to be accessed remotely.
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