Shared storage NFS

NFS (Network file system), a network file system, is one of the file systems supported by FreeBSD that allows computers in the network to share resources across TCP/IP networks. In an NFS application, a local NFS client application can transparently read and write to files located on the remote NFS server, just as you would access a local file. First, the basic Environment 1) server 10.1.10.117 erh0 7.8 (Debian)  3.2.0-4-amd642) client 10.1.10.160 eth0 5.0.10 ( Debian)  2.6.26-2-amd64 Second, install NFS1, install NFS server Apt-get -y install nfs-kernel-server2, create a shared directory mkdir  /OPT/NFSDATA -P3, modifying configuration cat /etc/exports/opt/nfsdata 10.1.10.117 (Rw,async,no_root_squash)  10.1.10.160 (Rw,async,no_root_squash) 4, parameter description ro                  #只读访问rw                   #读写访问sync                #将数据同步写入内存缓冲区与磁盘中, low efficiency, but can guarantee the consistency of data async               #将数据先保存在内存缓冲区中, write disk secure         & if necessarynbsp;   #限制客户端只能从小于1024的tcp/IP Port connection to server for NFS insecure            #允许客户端从大于1024的tcp/IP Port connection Server wdelay              #检查是否有相关的写操作, if any, perform these writes together, which can improve efficiency no_wdelay           #若有写操作则立即执行 should be used in conjunction with Sync hide                #在NFS共享目录中不共享其子目录no_hide            # The subdirectory for the shared NFS directory subtree_check      #若输出目录是一个子目录, and the NFS server checks the permissions of its parent directory no_subtree_check    #即使输出目录是一个子目录, Server for NFS does not check the permissions of its parent directory, which can improve efficiency all_squash        # Maps all normal users and groups that are accessed remotely to anonymous users or user groups (Nfsnobody) no_all_squash      #与all_squash取反root_squash         #将root用户及所属组都映射为匿名用户或用户组no_root_squash     # Anti-anonuid=xxx     & with Rootsquashnbsp;  #将远程访问的所有用户都映射为匿名用户 and specifies that the user is a local user (uid=xxx) anongid=xxx       # Map all remote access user groups to the anonymous user group account and specify that the anonymous user group account is a local user group account (GID=XXX) 5, restart the service [ ok ] stopping nfs kernel  DAEMON: MOUNTD NFSD. [ ok ] unexporting directories for nfs kernel daemon .... [....]  Exporting directories for NFS kernel daemon...exportfs: /etc/exports  [1]: neither  ' Subtree_check '  or  ' No_subtree_check '  specified for export   "10.1.10.117:/opt/nfsdata" .  assuming default behaviour  (' No_subtree_check ').   NOTE: this default has changed since nfs-utils version  1.0.xexportfs: /etc/exports [1]: neither  ' Subtree_check '  or  ' No_subtree_check '  specified for export  "10.1.10.160:/opt/nfsdata".   assuming default behaviour  (' No_subtree_check ').   note: this default has changed since  nfs-utils version 1.0.x. ok [ ok ] starting nfs kernel  daemon: nfsd mountd.6, view share specific information cat /var/lib/nfs/etab/opt/nfsdata     10.1.10.117 (Rw,async,wdelay,hide,nocrossmnt,secure,no_root_squash,no_all_squash,no_subtree_check,secure_locks, acl,anonuid=65534,anongid=65534)/opt/nfsdata    10.1.10.160 (Rw,async,wdelay,hide, nocrossmnt,secure,no_root_squash,no_all_squash,no_subtree_check,secure_locks,acl,anonuid=65534,anongid=65534) 7 , use the Showmount command to view the shared directory showmount -eexport list for debian:/opt/nfsdata  10.1.10.160,10.1.10.1178, use the rpcinfo command to view the monitored ports rpcinfo -p 10.1.10.117   program vers  proto   port  service    100000    4    tcp    111  portmapper    100000    3   tcp     111  portmapper    100000    2    Tcp    111  portmapper    100000    4    udp    111  portmapper    100000     3   udp    111  portmapper     100000    2   udp    111  portmapper     100024    1   udp  56564   status    100024    1   tcp  46588   status    100003    2   tcp   2049   nfs    100003    3   tcp   2049  nfs     100003    4   tcp   2049  nfs     100227    2   tcp   2049     100227    3   tcp   2049    100003     2   udp   2049  nfs     100003    3   udp   2049  nfs     100003    4   udp   2049  nfs     100227    2   udp   2049     100227    3   udp   2049    100021     1 &Nbsp; udp  41855  nlockmgr    100021    3    udp  41855  nlockmgr    100021     4   udp  41855  nlockmgr    100021     1   tcp  38046  nlockmgr    100021     3   tcp  38046  nlockmgr    100021     4   tcp  38046  nlockmgr     100005    1   udp  36619  mountd     100005    1   tcp  37282  mountd     100005    2   udp  54466  mountd     100005    2   tcp  57293  mountd    100005     3   udp  52004  mountd    100005     3   TCP  40933  MOUNTD9, view to the corresponding service is on by default boot up (automatically added when installing) ll /etc /rc2.d/lrwxrwxrwx 1 root root  17 aug  4 14:52 s13rpcbind  ->&NBSP, .... /init.d/rpcbindlrwxrwxrwx 1 root root  20 aug  4 14:52  S14NFS-COMMON ->&NBSP, .... /init.d/nfs-commonlrwxrwxrwx 1 root root  27 aug  4 14:52  S16NFS-KERNEL-SERVER ->&NBSP, .... /INIT.D/NFS-KERNEL-SERVER        10, test 1) native Mount Mount -t nfs  10.1.10.117:/opt/nfsdata/ /mnt2) View df -thfilesystem                                               type      size   Used Avail Use% Mounted onrootfs                                                    rootfs    9.2G  703M  8.1G    8% /udev                                                      devtmpfs   10M     0   10M   0% /devtmpfs                                                     tmpfs       24m  236k   23m   1% /run/dev/disk/by-uuid/ 62f9f2a1-249c-41fe-b639-c5137c10bf83 ext4      9.2g  703m   8.1G   8% /tmpfs                                                     tmpfs     5.0m     0  5.0m   0% /run/locktmpfs                                                     tmpfs      810M     0  810M   0% /run/shm/dev/sda5                                                 ext4       27G   172M   26G   1% /opt10.1.10.117:/opt/nfsdata                                 nfs4       27g  172m   26g    1% /MNT Three, client mount (remote) 10.1.10.1601, install NFS client Apt-get -y install nfs-common2, View 10.1.10.117 shared directory information Showmount -e 10.1.10.117export list for 10.1.10.117:/opt/nfsdata  10.1.10.160,10.1.10.1173, re-mount Mount -t nfs 10.1.10.117:/opt/nfsdata/ /mnt4, view [email  protected]:~# df -ThFilesystem    Type    Size   Used Avail Use% Mounted on/dev/sda1     ext3     9.2G  801M  8.0G   9% /tmpfs         tmpfs    124M     0  124M    0% /lib/init/rwudev         tmpfs     10m   700k  9.4m   7% /devtmpfs        tmpfs     124m     0  124m   0% /dev/shm/ dev/sda5     ext3     17g  487m    16g   3% /opt10.1.10.117:/opt/nfsdata/                nfs     27G  172M    26G   1% /MNT5, add/etc/fstab Boot auto mount 1) Add 10.1.10.117:/opt/nfsdata /in/etc/fstab last 1 lines MNT NFS DEFAULTS 0 02) Use mount -a check [email protected]:~# df - Thfilesystem    type    size  used avail use%  mounted on/dev/sda1     ext3    9.2g  802m  8.0g   9%  /tmpfs        tmpfs    124M      0  124M   0% /lib/init/rwudev          tmpfs     10M  700K  9.4M    7% /devtmpfs        tmpfs    124M      0  124M   0% /dev/shm/dev/sda5      ext3     17g  487m   16g   3% / opt10.1.10.117:/opt/nfsdata                nfs     27g  172m   26g   1%  /mnt                Four, Server View 1, on the server can see the client 10.1.10.160 has been connected up showmount  -aall mount points on debian:10.1.10.160:/opt/nfsdata2, can see 10.1.10.160 mounted scraping information cat  /VAR/LIB/NFS/RMTAB 10.1.10.160:/OPT/NFSDATA:0X00000001 Five, there are exportfs nfsstat and other orders, temporarily useless, you can experience the next six, Reference article http://nfs.sourceforge.net/

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Shared storage NFS