0. 安裝依賴包
yum install -y showmount
1. 修改配置文件
修改core-site.xml
<property>
<name>hadoop.proxyuser.root.groups</name>
<value>*</value>
<description>
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.
</description>
</property>
<property>
<name>hadoop.proxyuser.root.hosts</name>
<value>*</value>
<description>
This is the host where the nfs gateway is running. Set this to '*' to allow
requests from any hosts to be proxied.
</description>
</property>
修改hdfs-site.xml
<property>
<name>nfs.dump.dir</name>
<value>/tmp/.hdfs-nfs</value>
</property>
<property>
<name>nfs.rtmax</name>
<value>1048576</value>
<description>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).</description>
</property>
<property>
<name>nfs.wtmax</name>
<value>65536</value>
<description>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).</description>
</property>
<property>
<name>nfs.exports.allowed.hosts</name>
<value>* rw</value>
<description>允許所有主機(jī)對文件有rw權(quán)限</description>
</property>
2. 重啟hadoop集群服務(wù)
sbin/stop-all.sh
sbin/start-all.sh
#上述方法提示廢棄幌墓，可使用
sbin/stop-dfs.sh
sbin/stop-yarn.sh
sbin/start-dfs.sh
sbin/start-yarn.sh
3. 啟動(dòng)hadoop nfs
systemctl stop rpcbind
systemctl stop nfs
#這里需要重啟主機(jī)横堡，否則portmap會(huì)啟動(dòng)失敗，原因是111端口還是在被使用
sbin/hadoop-daemon.sh --script bin/hdfs start portmap
sbin/hadoop-daemon.sh --script bin/hdfs start nfs3
4. 掛載
mount -t nfs -o vers=3,proto=tcp,nolock,noacl,sync ceph-1:/ /mnt/hdfs
注意：
- slave節(jié)點(diǎn)不需要按照上面修改配置文件寇钉，只需要按照指定的yum包搏恤，然后直接掛載即可
