97.1 演示环境介绍

CM和CDH版本：5.11.2

97.2 操作演示

NFS GateWay服务安装
- 管理员账号登录CM，进入HDFS服务实例界面，添加角色实例，选择新添加的NFS GateWay服务并启动

Linux下挂载NFS文件系统

Fayson选择集群任意节点（ip-186-31-21-45.ap-southeast-1.compute.internal）进行NFS挂载
登录186.31.21.45服务，安装NFS依赖包

[ec2-user@ip-186-31-21-45 ~]$ sudo yum -y install nfs-utils*

[ec2-user@ip-186-31-21-45 ~]$ sudo mkdir /hdfs_nfs_mount

在命令行执行如下命令挂载NFS文件系统

<pre style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; color: rgb(51, 51, 51); font-size: 17px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(253, 246, 227);">[ec2-user@ip-186-31-21-45 ~]$ sudo mount -t nfs -o vers=3,proto=tcp,nolock ip-186-31-26-80.ap-southeast-1.compute.internal:/ /hdfs_nfs_mount</pre>

自动挂载NFS文件系统

编辑/etc/fstab文件，在文件最后行增加如下配置

<pre style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; color: rgb(51, 51, 51); font-size: 17px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(253, 246, 227);">[ec2-user@ip-186-31-21-45 ~]$ sudo vim /etc/fstab #
# /etc/fstab
# Created by anaconda on Tue Oct 25 15:56:15 2016
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
# UUID=d8048d39-5ce3-4cdf-9115-416a99b36906 / xfs     defaults 0 0 ip-186-31-26-80.ap-southeast-1.compute.internal:/ /hdfs_nfs_mount nfs     defaults 0 0</pre>

重启OS后查看是否挂载成功

验证NFS挂载

进入/hdfs_nfs_mount目录，列出HDFS根目录下所有的文件

[ec2-user@ip-186-31-21-45 ~]$ cd /hdfs_nfs_mount/
[ec2-user@ip-186-31-21-45 hdfs_nfs_mount]$ ll

使用ec2-user用户向本地文件系统/hdfs_nfs_mount/fayson目录拷贝文件

[ec2-user@ip-186-31-21-45 ~]$ cp fayson.keytab /hdfs_nfs_mount/fayson/
[ec2-user@ip-186-31-21-45 ~]$ ll /hdfs_nfs_mount/fayson/
total 28181
-rw------- 1 ec2-user 2584148964      514 Dec 27 08:39 fayson.keytab
-rw-r--r-- 1 ec2-user 2584148964 28855325 Oct  3 10:28 item.csv
[ec2-user@ip-186-31-21-45 ~]$