[HDFS-15886] Add a way to get protected dirs from a special configuration file

• Type: New Feature
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.4.0
• Component/s: namenode
• Labels: pull-request-available
• Assignee: Max Xie
• Reporter: Max Xie
• Created: 10/Mar/21 08:51
• Updated: 29/Jul/21 21:03

Description

We used protected dirs to ensure that important data directories cannot be deleted by mistake. But protected dirs can only be configured in hdfs-site.xml.

For ease of management,  we add a way to get the list of protected dirs from a special configuration file.

How to use.

1. set the config in hdfs-site.xml

```

<property>
<name>fs.protected.directories</name>
<value>/hdfs/path/1,/hdfs/path/2,file:///path/to/protected.dirs.config</value>
</property>

```

2.  add some protected dirs to the config file (file:///path/to/protected.dirs.config)

```

/hdfs/path/4

/hdfs/path/5

```

3. use command to refresh fs.protected.directories instead of FSDirectory.setProtectedDirectories(..)

```

hdfs dfsadmin -refreshProtectedDirectories

```

 

Issue Links

• links to: GitHub Pull Request #2768