欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  网络运营

Ubuntu配置NFS的具体流程(推荐)

程序员文章站 2022-07-04 18:21:16
nfs 是network file system的缩写,即网络文件系统,一种使用于分散式文件系统的协定 nfs通过网络让不同的机器、不同的操作系统能够彼此分享个别的数据,...

nfs 是network file system的缩写,即网络文件系统,一种使用于分散式文件系统的协定

nfs通过网络让不同的机器、不同的操作系统能够彼此分享个别的数据,例如将/home设置为共享目录,然后共享给网络中的其它服务器,这样每台机器就不必单独建立自己的/home路径了,nfs独立于操作系统,容许不同硬件及操作系统的系统共同进行文件的分享,是在类unix系统间实现磁盘文件共享的一种方法

nfs本身没有提供信息传输的协议和功能,而是使用rpc服务完成这部分功能。可以说nfs本身就是使用rpc服务的一个程序,或者说nfs也是一个rpc server。所以只要用到nfs的地方都要启动rpc服务,不论是nfs server还是nfs client,可以这么理解rpc和nfs之间的关系:nfs是一个文件系统,而rpc负责信息的传输

一,系统环境

linux distribution:ubuntu 14

二,安装linux nfs

sean@sean:~$ sudo apt-get install nfs-kernel-server
[sudo] password for sean: 
reading package lists... done
building dependency tree    
reading state information... done
the following extra packages will be installed:
 keyutils libgssglue1 libnfsidmap2 libtirpc1 nfs-common rpcbind
suggested packages:
 open-iscsi watchdog
the following new packages will be installed:
 keyutils libgssglue1 libnfsidmap2 libtirpc1 nfs-common nfs-kernel-server
 rpcbind
0 upgraded, 7 newly installed, 0 to remove and 159 not upgraded.
need to get 460 kb of archives.
after this operation, 2,049 kb of additional disk space will be used.
do you want to continue? [y/n] y
get:1 http://cn.archive.ubuntu.com/ubuntu/ trusty/main libgssglue1 amd64 0.4-2ubuntu1 [19.7 kb]
get:2 http://cn.archive.ubuntu.com/ubuntu/ trusty/main libnfsidmap2 amd64 0.25-5 [32.2 kb]
get:3 http://cn.archive.ubuntu.com/ubuntu/ trusty/main libtirpc1 amd64 0.2.2-5ubuntu2 [71.3 kb]
get:4 http://cn.archive.ubuntu.com/ubuntu/ trusty/main keyutils amd64 1.5.6-1 [33.6 kb]
get:5 http://cn.archive.ubuntu.com/ubuntu/ trusty-updates/main rpcbind amd64 0.2.1-2ubuntu2.2 [37.1 kb]
get:6 http://cn.archive.ubuntu.com/ubuntu/ trusty-updates/main nfs-common amd64 1:1.2.8-6ubuntu1.2 [181 kb]
get:7 http://cn.archive.ubuntu.com/ubuntu/ trusty-updates/main nfs-kernel-server amd64 1:1.2.8-6ubuntu1.2 [85.8 kb]
fetched 460 kb in 16s (27.2 kb/s)                       
selecting previously unselected package libgssglue1:amd64.
(reading database ... 168701 files and directories currently installed.)
preparing to unpack .../libgssglue1_0.4-2ubuntu1_amd64.deb ...
unpacking libgssglue1:amd64 (0.4-2ubuntu1) ...
selecting previously unselected package libnfsidmap2:amd64.
preparing to unpack .../libnfsidmap2_0.25-5_amd64.deb ...
unpacking libnfsidmap2:amd64 (0.25-5) ...
selecting previously unselected package libtirpc1:amd64.
preparing to unpack .../libtirpc1_0.2.2-5ubuntu2_amd64.deb ...
unpacking libtirpc1:amd64 (0.2.2-5ubuntu2) ...
selecting previously unselected package keyutils.
preparing to unpack .../keyutils_1.5.6-1_amd64.deb ...
unpacking keyutils (1.5.6-1) ...
selecting previously unselected package rpcbind.
preparing to unpack .../rpcbind_0.2.1-2ubuntu2.2_amd64.deb ...
unpacking rpcbind (0.2.1-2ubuntu2.2) ...
selecting previously unselected package nfs-common.
preparing to unpack .../nfs-common_1%3a1.2.8-6ubuntu1.2_amd64.deb ...
unpacking nfs-common (1:1.2.8-6ubuntu1.2) ...
selecting previously unselected package nfs-kernel-server.
preparing to unpack .../nfs-kernel-server_1%3a1.2.8-6ubuntu1.2_amd64.deb ...
unpacking nfs-kernel-server (1:1.2.8-6ubuntu1.2) ...
processing triggers for man-db (2.6.7.1-1ubuntu1) ...
processing triggers for ureadahead (0.100.0-16) ...
ureadahead will be reprofiled on next reboot
setting up libgssglue1:amd64 (0.4-2ubuntu1) ...
setting up libnfsidmap2:amd64 (0.25-5) ...
setting up libtirpc1:amd64 (0.2.2-5ubuntu2) ...
setting up keyutils (1.5.6-1) ...
setting up rpcbind (0.2.1-2ubuntu2.2) ...
 removing any system startup links for /etc/init.d/rpcbind ...
rpcbind start/running, process 12074
processing triggers for ureadahead (0.100.0-16) ...
setting up nfs-common (1:1.2.8-6ubuntu1.2) ...

creating config file /etc/idmapd.conf with new version

creating config file /etc/default/nfs-common with new version
adding system user `statd' (uid 118) ...
adding new user `statd' (uid 118) with group `nogroup' ...
not creating home directory `/var/lib/nfs'.
statd start/running, process 12307
gssd stop/pre-start, process 12341
idmapd start/running, process 12399
processing triggers for ureadahead (0.100.0-16) ...
setting up nfs-kernel-server (1:1.2.8-6ubuntu1.2) ...

creating config file /etc/exports with new version

creating config file /etc/default/nfs-kernel-server with new version
 * not starting nfs kernel daemon: no exports.
processing triggers for libc-bin (2.19-0ubuntu6.7) ...
processing triggers for ureadahead (0.100.0-16) ...

通过安装日志可以发现总共会安装keyutils,libgssglue1,libnfsidmap2,libtirpc1,nfs-common,nfs-kernel-server,rpcbind这7个包

很多文档中安装的包为portmap,但是这个包已经被rpcbind替代

sean@sean:~$ sudo apt-get install portmap
reading package lists... done
building dependency tree
reading state information... done
note, selecting 'rpcbind' instead of 'portmap'
rpcbind is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 164 not upgraded.
rpcbind包安装完成后会自动启动rpcbind服务

sean@sean:~$ ps -ef|grep rpcbind
root 807 1 0 22:27 ? 00:00:00 rpcbind
sean 10215 9528 0 22:48 pts/6 00:00:00 grep --color=auto rpcbind
但是由于目前nfs的配置文件为空,nfs服务并没有启动

三,配置nfs服务

Ubuntu配置NFS的具体流程(推荐)

从安装日志中我们可以发现nfs服务的配置文件为/etc/exports,并且这个文件在安装过程中已经生成好了,我们所要做的就是将nfs配置信息添加到这个文件中

sean@sean:~$ sudo vi /etc/exports
# /etc/exports: the access control list for filesystems which may be exported
#        to nfs clients. see exports(5).
#
# example for nfsv2 and nfsv3:
# /srv/homes    hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check)
#
# example for nfsv4:
# /srv/nfs4    gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check)
# /srv/nfs4/homes gss/krb5i(rw,sync,no_subtree_check)
/home/sean/sharedir 192.168.137.129(rw,no_root_squash,async)

其中中的最后一行为新添加的nfs配置,nfs配置信息格式如下:

<共享目录> [客户端1 选项(访问权限,用户映射,其他)] [客户端2 选项(访问权限,用户映射,其他)]

1,共享目录:

共享目录是指nfs系统中需要共享给客户机使用的目录

2,客户端:

客户端是指网络中可以访问nfs共享目录的计算机

客户端常用的指定方式:

(1)指定ip地址的主机:192.168.0.1
(2)指定子网中的所有主机:192.168.0.0/255.255.255.0
(3)指定域名的主机:www.sean.com
(4)指定域中的所有主机:*.sean.com
(5)所有主机:*

3,选项:

选项用来设置输出目录的访问权限、用户映射等,nfs主要有3类选项:

访问权限选项:

(1)设置输出目录只读:ro
(2)设置输出目录读写:rw

用户映射选项:

(1)all_squash:将远程访问的所有普通用户及所属组都映射为匿名用户或用户组(nfsnobody)
(2)no_all_squash:与all_squash取反(默认设置)
(3)root_squash:将root用户及所属组都映射为匿名用户或用户组(默认设置)
(4)no_root_squash:与rootsquash取反
(5)anonuid=xxx:将远程访问的所有用户都映射为匿名用户,并指定该用户为本地用户(uid=xxx)
(6)anongid=xxx:将远程访问的所有用户组都映射为匿名用户组账户,并指定该匿名用户组账户为本地用户组账户(gid=xxx)

其它选项:

(1)secure:限制客户端只能从小于1024的tcp/ip端口连接nfs服务器(默认设置)
(2)insecure:允许客户端从大于1024的tcp/ip端口连接服务器
(3)sync:将数据同步写入内存缓冲区与磁盘中,效率低,但可以保证数据的一致性
(4)async:将数据先保存在内存缓冲区中,必要时才写入磁盘
(5)wdelay:检查是否有相关的写操作,如果有则将这些写操作一起执行,这样可以提高效率(默认设置)
(6)no_wdelay:若有写操作则立即执行,应与sync配合使用
(7)subtree:若输出目录是一个子目录,则nfs服务器将检查其父目录的权限(默认设置)
(8)no_subtree:即使输出目录是一个子目录,nfs服务器也不检查其父目录的权限,这样可以提高效率

四,启动nfs服务

sean@sean:~$ sudo service nfs-kernel-server start
 * exporting directories for nfs kernel daemon...                                                                exportfs: /etc/exports [1]: neither 'subtree_check' or 'no_subtree_check' specified for export "192.168.137.129:/home/sean/sharedir".
 assuming default behaviour ('no_subtree_check').
 note: this default has changed since nfs-utils version 1.0.x

 * starting nfs kernel daemon  
sean@sean:~$ sudo service nfs-kernel-server status
nfsd running
sean@sean:~$ ps -ef|grep nfsd
root   10536   2 0 23:40 ?    00:00:00 [nfsd4]
root   10537   2 0 23:40 ?    00:00:00 [nfsd4_callbacks]
root   10539   2 0 23:40 ?    00:00:00 [nfsd]
root   10540   2 0 23:40 ?    00:00:00 [nfsd]
root   10541   2 0 23:40 ?    00:00:00 [nfsd]
root   10542   2 0 23:40 ?    00:00:00 [nfsd]
root   10543   2 0 23:40 ?    00:00:00 [nfsd]
root   10544   2 0 23:40 ?    00:00:00 [nfsd]
root   10545   2 0 23:40 ?    00:00:00 [nfsd]
root   10546   2 0 23:40 ?    00:00:00 [nfsd]
sean   10566  9528 0 23:41 pts/6  00:00:00 grep --color=auto nfsd

通过命令可以看到文件夹已经被共享

sean@sean:~$ showmount -e
export list for sean:
/home/sean/sharedir 192.168.137.129

五,客户端挂载nfs共享目录

sean@ubuntu:~$ sudo mount 192.168.137.128:/home/sean/sharedir /home/sean/shared
mount: wrong fs type, bad option, bad superblock on 192.168.137.128:/home/sean/sharedir,
    missing codepage or helper program, or other error
    (for several filesystems (e.g. nfs, cifs) you might
    need a /sbin/mount.<type> helper program)
    in some cases useful info is found in syslog - try
    dmesg | tail or so

上网查看了一下错误原因,是因为客户端没有安装nfs-common包

sean@ubuntu:~$ sudo apt-get install nfs-common
之后再次使用挂载命令即可,此时如果我们再次查看客户端挂载的磁盘,就可以看到nfs共享目录已经被挂载上了

sean@ubuntu:~$ df
filesystem             1k-blocks  used available use% mounted on
udev                  488800    4  488796  1% /dev
tmpfs                  99904  1456   98448  2% /run
/dev/sda1              19478204 3745568 14720156 21% /
none                    4    0     4  0% /sys/fs/cgroup
none                   5120    0   5120  0% /run/lock
none                  499512   152  499360  1% /run/shm
none                  102400   40  102360  1% /run/user
/dev/sr0               1044480 1044480     0 100% /media/sean/ubuntu 14.04.4 lts amd64
192.168.137.128:/home/sean/sharedir 19478272 4288896 14176896 24% /home/sean/shared

此时如果我们在128的/home/sean/sharedir目录下创建一个文件,在129的/home/sean/shared目录下可以看到一个名称相同的文件,并且文件的内容也相同

六,开机启动nfs服务

安装完成之后查看系统服务

sean@sean:~$ runlevel
n 2
sean@sean:~$ ll /etc/rc2.d
total 20
drwxr-xr-x 2 root root 4096 6月 20 23:25 ./
drwxr-xr-x 132 root root 12288 6月 26 20:16 ../
-rw-r--r-- 1 root root 677 2月 17 12:59 readme
lrwxrwxrwx 1 root root 20 2月 22 06:33 s20kerneloops -> ../init.d/kerneloops*
lrwxrwxrwx 1 root root 27 6月 20 23:25 s20nfs-kernel-server -> ../init.d/nfs-kernel-server*
lrwxrwxrwx 1 root root 15 2月 22 06:33 s20rsync -> ../init.d/rsync*
lrwxrwxrwx 1 root root 27 2月 22 06:33 s20speech-dispatcher -> ../init.d/speech-dispatcher*
lrwxrwxrwx 1 root root 15 2月 22 06:33 s50saned -> ../init.d/saned*
lrwxrwxrwx 1 root root 19 2月 22 06:33 s70dns-clean -> ../init.d/dns-clean*
lrwxrwxrwx 1 root root 18 2月 22 06:33 s70pppd-dns -> ../init.d/pppd-dns*
lrwxrwxrwx 1 root root 21 2月 22 06:33 s99grub-common -> ../init.d/grub-common*
lrwxrwxrwx 1 root root 18 2月 22 06:33 s99ondemand -> ../init.d/ondemand*
lrwxrwxrwx 1 root root 18 2月 22 06:33 s99rc.local -> ../init.d/rc.local*
nfs-kernel-server是自动启动,就不需要再进行修改了,而rpcbind就比较麻烦了,找了半天才找到vi /etc/init/rpcbind-boot.conf

# portmap-boot

description "upstart job to start rpcbind on boot only"
author "clint byrum"

emits start-rpcbind

start on virtual-filesystems and net-device-up iface=lo

task

exec initctl emit --no-wait start-rpcbind on_boot=y
可以见到这个服务设为开机启动了

七,开机自动挂载共享盘

这时候我们需要修改的文件是/etc/fstab,命令格式如下:

<nfs服务端>:<共享目录> <本地目录> <文件系统类型> <选项> <dump> <pass>每个字段的具体含义这里就不详细解释了,vi /etc/fstab,在文件中添加下面这行配置

192.168.137.128:/home/sean/sharedir /home/sean/shared nfs defaults 0 0系统每次启动时即会自动挂载共享盘

以上这篇ubuntu配置nfs的具体流程(推荐)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。