NFS/CIFS/iSCSI exports/shares are not automatically mounted at boot on a RHEL client

 SOLUTION 已验证 - 已更新 2019年五月2日23:36 - 

English 

环境

• Red Hat Enterprise Linux 4
• Red Hat Enterprise Linux 5
• Red Hat Enterprise Linux 6
• Red Hat Enterprise Linux 7
• NFS v3
• NFS v4
• Samba filesystem
• Filesystems on block-devices depending on networking (e.g. iSCSI)

问题

• NFS share is not mounting correctly at boot time as specified in fstab file.
• Unable to mount nfs share at boot time on Red Hat Enterprise Linux 5.5.

• NFS/SMBFS mounts do not mount when the system boots up, however, running the following command after boot works to mount the NFS or SMBFS shares:

  Raw

  # mount -a 
  

  Need to know why NFS mounts didn't mount after reboot.

决议

1. Netfs(remote-fs.target in RHEL7) is responsible for mounting network filesystems at boot time. Enable netfs(remote-fs.target in RHEL7) and reboot:

   Raw

   RHEL 4, 5, 6
   
   # chkconfig netfs on
   
   RHEL 7
   
   # systemctl enable  remote-fs.target
   

2. If that does not solve the problem, try adding the _netdev mount option in the /etc/fstab to the problematic network filesystem mount entry.

   Raw

   # vi /etc/fstab
   nfs.example.com:/export /mnt/nfs defaults,_netdev 0 0 
   

3. Reboot the system and verify the network filesystems are mounted.

See How can I mount iSCSI devices in /etc/fstab at boot time in RHEL? for additional information.