hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Brandon Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7942) NFS: support regexp grouping in nfs.exports.allowed.hosts
Date Fri, 20 Mar 2015 18:08:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14371760#comment-14371760

Brandon Li commented on HDFS-7942:

Here is the explanation for wildcard usage in export table.(http://linux.die.net/man/5/exports)
+Machine names may contain the wildcard characters * and ?, or may contain character class
lists within [square 
brackets]. This can be used to make the exports file more compact; for instance, *.cs.foo.edu
matches all hosts in 
the domain cs.foo.edu. As these characters also match the dots in a domain name, the given
pattern will also 
match all hosts within any subdomain of cs.foo.edu.

Since NFS Gateway uses java regular expression, the usage of wildcards is a bit different.
For example,
1. instead of "*.cs.foo.edu", one should use "\\w*.cs.foo.edu"
2. instead of "206.190.52.[26|23]", one should use "206.190.52.(26|23)"
I will update the user guide accordingly.

> NFS: support regexp grouping in nfs.exports.allowed.hosts
> ---------------------------------------------------------
>                 Key: HDFS-7942
>                 URL: https://issues.apache.org/jira/browse/HDFS-7942
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: nfs
>    Affects Versions: 2.6.0
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>         Attachments: HDFS-7942.001.patch
> Thanks, [~yeshavora], for reporting this problem.
> Set regex value in nfs.exports.allowed.hosts property.
> {noformat}
> <property><name>nfs.exports.allowed.hosts</name><value>206.190.52.[26|23]
> {noformat}
> With this value, neither nor can mount nfs and act as nfs
client. In conclusion, no host can mount nfs with this regex value due to access denied error.
> {noformat}
> >$ sudo su - -c "mount -o soft,proto=tcp,vers=3,rsize=1048576,wsize=1048576,nolock /tmp/tmp_mnt" root
> mount.nfs: access denied by server while mounting
> {noformat}

This message was sent by Atlassian JIRA

View raw message