NFS永久挂载
服务端 nfs rpcbind 开机自启动
[root@nfs01 ~]# systemctl is-active rpcbind nfs
active
active
[root@nfs01 ~]# systemctl is-enabled rpcbind nfs
enabled
enabled
方法1 /etc/rc.local
chmod +x /etc/rc.d/rc.local
方法2 /etc/fstab 通过/etc/fstab 实现nfs开机自动挂载
172.16.1.31:/nfs /nfs nfs defaults 0 0
通过/etc/fstab 实现nfs开机自动挂载
CentOS6 失败
启动 netfs 服务
[root@web01 ~]# mount 172.16.1.31:/nfs /nfs
mount.nfs: /nfs is busy or already mounted
[root@web01 ~]# mount 172.16.1.31:/nfs /nfs
mount.nfs: /nfs is busy or already mounted
[root@web01 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 99G 1.7G 98G 2% /
devtmpfs 476M 0 476M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 14M 473M 3% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/sda1 197M 105M 93M 54% /boot
tmpfs 98M 0 98M 0% /run/user/0
172.16.1.31:/nfs 99G 1.7G 98G 2% /nfs
[root@web01 ~]# grep /nfs /proc/mounts
172.16.1.31:/nfs /nfs nfs4 rw,relatime,vers=4.1,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.16.1.7,local_lock=none,addr=172.16.1.31 0 0
Stale file handle
文件句柄错误
df -h 没有挂载这个 nfs
grep /nfs /proc/mounts 已经挂载
解决：
强制卸载 /nfs
[root@web01 ~]# cp /bin/ls /nfs
cp: failed to access ‘/nfs’: Stale file handle
[root@web01 ~]# cp /bin/ls /nfs/
cp: failed to access ‘/nfs/’: Stale file handle
[root@web01 ~]# cd /nfs/
-bash: cd: /nfs/: Stale file handle
[root@web01 ~]# mkdir -p /nfs/
mkdir: cannot create directory ‘/nfs/’: File exists
[root@web01 ~]# rm -r /nfs/
rm: cannot remove ‘/nfs/’: Stale file handle
an incorrect mount option was specified
不正确的 挂载参数
指定了1个错误的挂载参数
[root@web01 ~]# mount -t nfs -o nosiud,nodev,noexec 172.16.1.31:/data /mnt
mount.nfs: an incorrect mount option was specified
mount -o rsize=131072,wsize=131072,nosuid,noexec,nodev 172.16.1.31:/nfs /nfs
read-only file system
文件系统只读
touch: cannot touch ‘/root/alex.txt’: Read-only file system
mount -o rw,remount /
进入光盘救援模式
troubeshooting ---->rescue
continue 自动把磁盘的上面的根分区挂载到 /mnt/sysimage
shell 手动进行挂载
fdisk -l
mount /dev/sda3 /mnt/sysimage
chroot /mnt/sysimage #把当前系统的根目录设置为 从
/mnt/sysimage
vim /etc/fstab #修改磁盘上面的文件
重启
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