A Summary of NFS learning

System environment:

[Email protected] ~]# cat/etc/redhat-release

CentOS Release 6.7 (Final)

[Email protected] ~]#

[Email protected] ~]# uname-r

2.6.32-573.el6.x86_64

[Email protected] ~]# uname-m

x86_64

[Email protected] ~]# Rpm-qa nfs-utils rpcbind

[email protected] ~]# Yum install nfs-utils rpcbind-y

...........

has been installed:

nfs-utils.x86_64 1:1.2.3-64.el6 rpcbind.x86_64 0:0.2.0-11.el6

To be installed as a dependency:

keyutils.x86_64 0:1.4-5.el6 libevent.x86_64 0:1.4.13-4.el6

libgssglue.x86_64 0:0.1-11.el6 libtirpc.x86_64 0:0.2.1-10.el6

nfs-utils-lib.x86_64 0:1.1.5-11.el6 Python-argparse.noarch 0:1.2.1-2.1.el6

Complete!

[Email protected] ~]# Rpm-qa nfs-utils rpcbind

Nfs-utils-1.2.3-64.el6.x86_64

Rpcbind-0.2.0-11.el6.x86_64

[Email protected] ~]#/etc/init.d/rpcbind status

Rpcbind has stopped

[[email protected] ~]#/etc/init.d/rpcbind start

Starting rpcbind: [OK]

[Email protected] ~]#/etc/init.d/rpcbind status

Rpcbind (PID 27104) is running ...

[[email protected] ~]# Lsof-i: 111

COMMAND PID USER FD TYPE DEVICE size/off NODE NAME

Rpcbind 27104 RPC 6u IPv4 31439 0t0 UDP *:sunrpc

Rpcbind 27104 RPC 8u IPv4 31442 0t0 TCP *:sunrpc (LISTEN)

Rpcbind 27104 RPC 9u IPv6 31444 0t0 UDP *:sunrpc

Rpcbind 27104 RPC 11u IPv6 31447 0t0 TCP *:sunrpc (LISTEN)

[Email protected] ~]# Netstat-lntup|grep Rpcbind

TCP 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 27104/rpcbind

TCP 0 0::: 111:::* LISTEN 27104/rpcbind

UDP 0 0 0.0.0.0:991 0.0.0.0:* 27104/rpcbind

UDP 0 0 0.0.0.0:111 0.0.0.0:* 27104/rpcbind

UDP 0 0::: 991:::* 27104/rpcbind

UDP 0 0::: 111:::* 27104/rpcbind

[Email protected] ~]# chkconfig--list rpcbind

Rpcbind 0: Off 1: Off 2: Enable 3: Enable 4: Enable 5: Enable 6: Off

[Email protected] ~]# rpcinfo-p localhost

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

[Email protected] ~]#/ETC/INIT.D/NFS status

RPC.SVCGSSD has stopped

RPC.MOUNTD has stopped

NFSD has stopped

Rpc.rquotad has stopped

[[email protected] ~]#/etc/init.d/nfs start

Start NFS service: [OK]

Turn off NFS quotas: [OK]

Start NFS mountd: [OK]

Start the NFS daemon: [OK]

Starting RPC IDMAPD: [OK]

[[email protected] ~]# Netstat-lntup|grep 2049------NFS Primary Port

TCP 0 0 0.0.0.0:2049 0.0.0.0:* LISTEN-

TCP 0 0::: 2049:::* LISTEN-

UDP 0 0 0.0.0.0:2049 0.0.0.0:*-

UDP 0 0::: 2049:::*-

[Email protected] ~]# rpcinfo-p localhost

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

100011 1 UDP 875 Rquotad

100011 2 UDP 875 Rquotad

100011 1 TCP 875 Rquotad

100011 2 TCP 875 Rquotad

100005 1 UDP 40562 Mountd

100005 1 TCP 43893 Mountd

100005 2 UDP 53127 Mountd

100005 2 TCP 36081 MOUNTD

100005 3 UDP 56672 Mountd

100005 3 TCP 52133 Mountd

100003 2 TCP 2049 NFS

100003 3 TCP 2049 NFS

100003 4 TCP 2049 NFS

100227 2 TCP 2049 Nfs_acl

100227 3 TCP 2049 Nfs_acl

100003 2 UDP 2049 NFS

100003 3 UDP 2049 NFS

100003 4 UDP 2049 NFS

100227 2 UDP 2049 Nfs_acl

100227 3 UDP 2049 Nfs_acl

100021 1 UDP 42438 nlockmgr

100021 3 UDP 42438 nlockmgr

100021 4 UDP 42438 nlockmgr

100021 1 TCP 36179 Nlockmgr

100021 3 TCP 36179 Nlockmgr

100021 4 TCP 36179 Nlockmgr

Add to boot:

[Email protected] ~]# cat/etc/rc.local

......

/etc/init.d/rpcbind start

/etc/init.d/nfs start

[Email protected] ~]# ps-ef|egrep "Nfs|rpc"

RPC 27104 1 0 10:35? 00:00:00 Rpcbind

Root 27208 2 0 10:44? 00:00:00 [rpciod/0]

Root 27209 2 0 10:44? 00:00:00 [RPCIOD/1]

Root 27218 1 0 10:44? 00:00:00 Rpc.rquotad disk quotas into town

Root 27223 1 0 10:44? 00:00:00 RPC.MOUNTD Rights Management validation

Root 27230 2 0 10:44? 00:00:00 [NFSD4]

Root 27231 2 0 10:44? 00:00:00 [Nfsd4_callbacks]

Root 27232 2 0 10:44? 00:00:00 [NFSD] =====>NFS main process

Root 27233 2 0 10:44? 00:00:00 [NFSD] =====>NFS main process

Root 27234 2 0 10:44? 00:00:00 [NFSD] =====>NFS main process

Root 27235 2 0 10:44? 00:00:00 [NFSD]

Root 27236 2 0 10:44? 00:00:00 [NFSD]

Root 27237 2 0 10:44? 00:00:00 [NFSD]

Root 27238 2 0 10:44? 00:00:00 [NFSD]

Root 27239 2 0 10:44? 00:00:00 [NFSD]

Root 27270 1 0 10:44? 00:00:00 RPC.IDMAPD

Root 27299 2056 0 10:54 pts/1 00:00:00 grep-e nfs|rpc

[Email protected] ~]# Mkdir/data

[Email protected] ~]# Cat/etc/exports

/data 10.0.0.* (Rw,sync)

[[email protected] ~]#/etc/init.d/nfs Reload Reload Service

[[email protected] ~]# showmount-e 127.0.0.1 ======> View shared records

Export list for 127.0.0.1:

/data 10.0.0.*

[[email protected] ~]# mount-t NFS 10.0.0.7:/data/mnt Mount/data directory under/mnt

[Email protected] ~]# df-h

Filesystem Size used Avail use% mounted on

/dev/sda3 19G 1.5G 16G 9%/

Tmpfs 937M 0 937M 0%/dev/shm

/DEV/SDA1 190M 36M 145M 20%/boot

10.0.0.7:/data 19G 1.5G 16G 9%/mnt ======> mounted successfully

[Email protected] mnt]# Touch/data/oldboy.txt

[Email protected] mnt]# ll/data/

Total dosage 0

-rw-r--r--1 root root 0 November 11:16 oldboy.txt

[[email protected] ~]#/etc/init.d/rpcbind start

Starting rpcbind: [OK]

[Email protected] ~]# chkconfig rpcbind on

[Email protected] ~]# showmount-e 10.0.0.7

Export list for 10.0.0.7:

/data 10.0.0.0/24

Client Mount:

[Email protected] ~]# mount-t NFS 10.0.0.7:/data/mnt

[Email protected] ~]# df-h

Filesystem Size used Avail use% mounted on

/dev/sda3 19G 1.5G 16G 9%/

Tmpfs 937M 0 937M 0%/dev/shm

/DEV/SDA1 190M 36M 145M 20%/boot

10.0.0.7:/data 19G 1.5G 16G 9%/mnt

[[email protected] data]# Touch oldboy.txt =======> Server Create a file oldboy.txt

[email protected] data]# LL

Total dosage 0

-rw-r--r--1 root root 0 November 11:25 oldboy.txt

[email protected] mnt]# LL

Total dosage 0

-rw-r--r--1 root root 0 November 11:25 oldboy.txt ======> client view is present

[[email protected] mnt]# Touch Abc.txt ======> The client does not have permission to write

Touch: Unable to create "Abc.txt": Insufficient permissions

This problem occurs because the permissions are incorrect, the server side needs to authorize this directory, and the permissions are Nfsnobody

[[email protected] data]# chown-r nfsnobody/data/======> Authorized server has write access to/data

[Email protected] data]# ll/data/

Total dosage 0

-rw-r--r--1 nfsnobody Root 0 November 11:25 oldboy.txt ======> Master permissions changed

And then create it on the client

[[email protected] mnt]# Touch abc.txt =======> Client has been able to create files successfully

[Email protected] mnt]#

[[email protected] ~]#/etc/init.d/rpcbind start

Starting rpcbind: [OK]

[Email protected] ~]# chkconfig rpcbind on

[[email protected] ~]# mount-t NFS 10.0.0.7:/data/mnt =======> Mount

[Email protected] ~]# df-h

Filesystem Size used Avail use% mounted on

/dev/sda3 19G 1.5G 16G 9%/

Tmpfs 937M 0 937M 0%/dev/shm

/DEV/SDA1 190M 36M 145M 20%/boot

10.0.0.7:/data 19G 1.5G 16G 9%/mnt =======> mounted successfully

[[email protected] mnt]# Touch 9.txt

[email protected] mnt]# LL

-rw-r--r--1 nfsnobody nfsnobody 0 November 11:41 9.txt

[Email protected] data]# rm-f 9.txt

has been deleted.

Conclusion: Regardless of which NFS directory is created, other clients can delete and solve the shared storage problem.

Check the idea:

1 Ping

2 Telnet

3 if no route to host appears, you must check the firewall and security policy

4 Showmount

This article is from the "Linux" blog, so be sure to keep this source http://chenjisong.blog.51cto.com/7858025/1715888

A Summary of NFS learning