Help Center > > Getting Started> Step 3: Mount a File System> Mounting a File System Automatically

Mounting a File System Automatically

Updated at: Jan 10, 2020 GMT+08:00

To prevent mounting information loss after a restart of the ECS where a file system is mounted, you can configure the ECS and make the file system automatically be mounted after the ECS restarts.

Restrictions

Due to different mechanisms for managing startup items (service startup sequence), some ECSs running CentOS may not support the following automatic mounting schemes. In this case, manually mount the file system.

Procedure (Linux)

  1. Log in to the ECS as user root.
  2. Run the vi /etc/fstab command to edit the /etc/fstab file.

    At the end of the file, add the file system information, for example:
    example.com:/share-xxx /local_path nfs vers=3,timeo=600,nolock 0 0

    Replace example.com:/share-xxx and /local_path with actual values. Each record in the /etc/fstab file corresponds to a mount. Each record has six fields, as described in Field Description.

    For optimal system performance, configure file system information based on the previous example configuration. If needed, you can customize part of mount parameters. However, the customization may affect system performance.

  3. Press Esc, input :wq, and press Enter to save and exit.

    After the preceding configurations are complete, the system reads mounting information from the /etc/fstab file to automatically mount the file system when the ECS restarts.

  4. (Optional) Run the following command to view the updated content of the /etc/fstab file.

    cat /etc/fstab

    Figure 1 shows the updated file content.

    Figure 1 Updated file content

Field Description

Table 1 describes the mount fields.

Table 1 Field description

Field

Description

example.com:/share-xxx

Mount object, that is, the shared path of the file system to be mounted. Set it to the shared path in the mount command described in Mounting an NFS File System to ECSs (Linux).

/local_path

Mount point, that is, the directory created on the ECS for mounting the file system. Set this parameter to the local path in the mount command that is used in Mounting an NFS File System to ECSs (Linux).

nfs

Mount type, that is, file system or partition type. Set it to nfs.

vers=3,timeo=600,nolock

Mount options, used to set mount parameters. Use commas (,) to separate between multiple options.

  • vers: File system version. The value 3 indicates NFSv3.
  • timeo: Waiting time before the NFS client retransmits a request. The unit is 0.1 second. The recommended value is 600.
  • nolock: Whether to lock files on the server using the NLM protocol.

0

Choose whether to back up file systems using the dump command.

  • 0: not to back up
  • An integer larger than 0: to back up file systems. A file system with a smaller integer is checked earlier than that with a larger integer.

0

Choose whether to check file systems using the fsck command when the ECS is starting and specify the sequence for checking file systems.

  • 0: to check
  • By default, this field is set to 1 for the root directory partition. Other partitions start from 2, and a partition with a smaller integer is checked earlier than that with a larger integer.

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