需求背景

相信做Java开发的小伙伴可能都会遇到这样的需求，在生产环境多台机器需要访问一台机器上数据，这样的数据一般都是为了统一管理和存储，并且呢，这样的数据一般比较大，不容易进行迁移，因此我需要多台机器访问一台机器的上的数据的功能。

技术路线1

About Samba

Samba is the standard Windows interoperability suite of programs for Linux and Unix.

Samba is Free Software licensed under the GNU General Public License, the Samba project is a member of the Software Freedom Conservancy.

Since 1992, Samba has provided secure, stable and fast file and print services for all clients using the SMB/CIFS protocol, such as all versions of DOS and Windows, OS/2, Linux and many others.

Samba is an important component to seamlessly integrate Linux/Unix Servers and Desktops into Active Directory environments. It can function both as a domain controller or as a regular domain member.

安装Samba并配置

<pre mdtype="fences" cid="n31" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> # 在线安装samba和samba-client
yum install samba samba-client

使用vim编辑smb.conf

vi /etc/samba/smb.conf

[global]
workgroup = WORKGROUP
server string = Samba Server %v
netbios name = centos
security = user
map to guest = bad user
dns proxy = no

Share Definition

[Anonymous]
path = /samba/anonymous
browsable =yes
writable = yes
guest ok = yes
read only = no
</pre>

添加用户

<pre mdtype="fences" cid="n36" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> useradd -s /sbin/nologin/sambauser</pre>

设置密码

<pre mdtype="fences" cid="n40" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> smbpasswd -a sambauser</pre>

检测用户是否添加成功

<pre mdtype="fences" cid="n45" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> pdbedit -L</pre>

设置samba服务开机自启

<pre mdtype="fences" cid="n49" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> systemctl enable smb.service
systemctl enable nmb.service
systemctl restart smb.service
systemctl restart nmb.service</pre>

设置samba服务可以通过防火墙防御

<pre mdtype="fences" cid="n55" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> firewall-cmd --permanent --zone=public --add-service=samba
firewall-cmd --reload</pre>

测试语法是否正确

<pre mdtype="fences" cid="n58" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> testparam</pre>

开始挂载

<pre mdtype="fences" cid="n62" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> Mount –t cift //192.168.10.18:/share /share –o username=sambatest,password=xxxy</pre>

修改服务端口

samba服务默认使用的是445端口，按照如下方式可以进行修改：

<pre mdtype="fences" cid="n71" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> vim /etc/samba/smb.conf

在[global]内加入一行

smb ports = 4455

重启samba服务

systemctl restart smbd</pre>

查看服务状态

<pre mdtype="fences" cid="n75" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> systemctl status smbd</pre>

<pre mdtype="fences" cid="n77" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> tail /var/log/samba/log.smbd</pre>

查看服务是否运行在4455端口

<pre mdtype="fences" cid="n81" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> lsof -i:4455</pre>

对不同版本的Windows做了抓包测试，发现WinXP只访问139端口，Win7同时访问139与445端口，Win10只访问445端口

技术路线2

About nfs

NFS 就是 Network FileSystem 的缩写，最早之前是由 Sun这家公司所发展出来的 。 它最大的功能就是可以透过网络，让不同的机器、不同的操作系统、可以彼此分享文件。

服务端在线安装nfs

<pre mdtype="fences" cid="n92" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> # 使用yum安装nfs-utils时会把rpcbind一起安装上
yum -y install nfs-utils

编辑exports文件，添加客户端机器

vim /etc/exports

配置说明

/opt/nfs ，这个是本地要共享出去的目录

192.168.0.0/24 ，允许访问的主机，可以是一个IP：192.168.0.4，也可以是一个IP段：192.168.227.0/24

/opt/nfs 192.168.0.150(rw,sync,fsid=0) 192.168.0.151(rw,sync,fsid=0)
</pre>

设置nfs服务端开机自启

<pre class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n96" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> systemctl enable rpcbind.service
systemctl enable nfs-server.service

systemctl start rpcbind.service
systemctl start nfs.service </pre>

确认NFS服务器启动成功

<pre mdtype="fences" cid="n101" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> rpcinfo -p </pre>

通过查看service列中是否有nfs服务来确认NFS是否启动

<pre mdtype="fences" cid="n106" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> showmount -e 192.168.0.3 // 主机IP</pre>

在客户端安装nfs服务

<pre mdtype="fences" cid="n112" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> yum install -y nfs-utils

systemctl enable rpcbind.service

systemctl start rpcbind.service</pre>

注意：客户端不需要启动nfs服务，只需要启动rpcbind服务.

检查nfs服务器端是否有目录共享

<pre mdtype="fences" cid="n120" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> showmount -e 192.168.0.3</pre>

使用 mount 挂载A服务器端的目录/opt/nfs到客户端B的目录/opt/nfs下

<pre mdtype="fences" cid="n126" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> [root@localhost ~]# mkdir /opt/nfs

[root@localhost ~]# mount -t nfs 192.168.0.3:/opt/nfs/ /opt/nfs/

mount 102.64.102.134:/mnt/data/ Z: (102.64.102.134存储共享)
[root@localhost ~]# df -h

文件系统 容量 已用 可用 已用% 挂载点

/dev/mapper/centos-root 11G 1.3G 9.1G 13% /

devtmpfs 911M 0 911M 0% /dev

tmpfs 921M 0 921M 0% /dev/shm

tmpfs 921M 8.5M 912M 1% /run

tmpfs 921M 0 921M 0% /sys/fs/cgroup

/dev/sda1 497M 170M 328M 35% /boot

tmpfs 185M 0 185M 0% /run/user/0

192.168.227.3:/opt/nfs 11G 1.3G 9.1G 13% /opt/nfs

挂载完成，可以正常访问本机下的/opt/nfs，如果在服务端A在共享目录/opte/nfs中

写入文件，B、C机上可以看到，但是不能在这个目录中写入文件.</pre>

如果需要A、B、C三台机器都能够向共享目录写入文件，可按照如下操作进行:

<pre mdtype="fences" cid="n130" lang="" spellcheck="false" class="md-fences md-end-block md-fences-with-lineno ty-contain-cm modeLoaded" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); --select-text-bg-color: #36284e; --select-text-font-color: #fff; font-size: 0.9rem; line-height: 1.71429em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(218, 218, 218); position: relative !important; margin-bottom: 3em; margin-left: 2em; padding-left: 0px; padding-right: 1ch; width: inherit; color: rgb(31, 9, 9); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> [root@localhost home]# id root

uid=0(root) gid=0(root) 组=0(root)

2、在A服务器上再建立一个共享目录

mkdir /opt/nfs1

vim /etc/exports

/opt/nfs 192.168.0.4(rw,sync,fsid=0) 192.168.0.5(rw,sync,fsid=0)

/opt/nfs1 192.168.0.0/24(rw,sync,all_squash,anonuid=0,anongid=0)

加入第二行，anonuid=0,anongid=0即为root用户id。

3、让修改过的配置文件生效

exportfs –arv

使用exportfs命令，当改变/etc/exports配置文件后，不用重启nfs服务直接用这个exportfs即可，它的常用选项为[-aruv].

-a ：全部挂载或者卸载；

-r ：重新挂载；

-u ：卸载某一个目录；

-v ：显示共享的目录；

4、 查看新的可挂载目录及可连接的IP

showmount -e 192.168.0.3

5、在B、C clinet端新挂载一个目录

showmount -e 192.168.0.3 #查看新的挂载共享目录是否有了。

mkdir nfs1

mount -t nfs 192.168.0.3:/opt/nfs1/ /opt/nfs1/

ll / >/opt/nfs1/ll.txt #测试向新的共享目录中可以写入文件了。

（卸载挂载：umount /home/nfs1/)

6、想在客户机B、C上实现开机挂载，则需要编辑/etc/fstab：

vim /etc/fstab

加入以下内容：

192.168.0.3:/opt/nfs /opt/nfs nfs nolock 0 0

192.168.0.3:/opt/nfs1 /opt/nfs1 nfs nolock 0 0

保存后，重新挂载

mount </pre>