0.依存パッケージのインストール

yum install -y showmount

1.プロファイルの変更

    hadoop.proxyuser.root.groups
    *
    
         The 'nfsserver' user is allowed to proxy all members of the 'users-group1' and
         'users-group2' groups. Note that in most cases you will need to include the
         group "root" because the user "root" (which usually belonges to "root" group) will
         generally be the user that initially executes the mount on the NFS client system.
         Set this to '*' to allow nfsserver user to proxy any group.
    
    
    
    hadoop.proxyuser.root.hosts
    *
    
         This is the host where the nfs gateway is running. Set this to '*' to allow
         requests from any hosts to be proxied.
    
    

        nfs.dump.dir
        /tmp/.hdfs-nfs
    
    
        nfs.rtmax
        1048576
        This is the maximum size in bytes of a READ request supported by the NFS gateway. If you change this, make sure you also update the nfs mount's rsize(add rsize= # of bytes to the mount directive).
    
    
        nfs.wtmax
        65536
        This is the maximum size in bytes of a WRITE request supported by the NFS gateway. If you change this, make sure you also update the nfs mount's wsize(add wsize= # of bytes to the mount directive).
    
    
        nfs.exports.allowed.hosts
        * rw
                  rw  
    

2.hadoopクラスタサービスの再起動

sbin/stop-all.sh
sbin/start-all.sh
#        ，   
sbin/stop-dfs.sh
sbin/stop-yarn.sh
sbin/start-dfs.sh
sbin/start-yarn.sh

3.hadoop nfsの起動

systemctl stop rpcbind
systemctl stop nfs
#        ，  portmap     ，   111        
sbin/hadoop-daemon.sh --script bin/hdfs start portmap
sbin/hadoop-daemon.sh --script bin/hdfs start nfs3

4.マウント

mount -t nfs -o vers=3,proto=tcp,nolock,noacl,sync ceph-1:/  /mnt/hdfs

References