Creating an NFS Share

Procedure

1. Choose Resources > Resources > Namespace > Namespace.
2. Select the desired account from the Account drop-down list in the upper left corner.
3. Click More on the right of the desired namespace and select Create NFS Share.

   The Create NFS Share page is displayed.

4. Describe the NFS share.
   

   The description can be left blank or contain up to 255 characters.

5. Configure access permissions for the NFS share.
   

   • You can click More on the right of a client and select Modify to modify its information.
   • You can select one or more clients and click Remove, or click More on the right of a client and select Remove, to remove clients.
   1. Click Add.

      The Add Client page is displayed.

   2. Set client properties.

      Table 1 describes related parameters.

      Table 1 Client parameters

      Parameter	Description
      Type	Indicates the client type of the NFS share. NOTE: When a client is included in multiple share permissions, the priority of share authentication from high to low is in the following sequence: host name > IP address > network segment > wildcard > network group > *.
      Name or IP Address	When Type is set to Host, enter host names or service IP addresses of the clients to be added to the NFS share. When Type is set to Network group, enter the network group names configured in the LDAP or NIS domain. NOTE: You can enter multiple host names, IP addresses, or network group names separated by semicolons (;), spaces, or carriage returns. A host name: Contains 1 to 255 letters, including letters, digits, hyphens (-), periods (.), and underscores (_). Must start with a letter or digit and cannot end with a hyphen (-) or underscore (_). Cannot contain a combination of a period and underscore (_. or ._), a combination of a period and hyphen (-. or .-), consecutive periods (..), or pure digits. For IP addresses: You can enter client IP addresses, client IP address segments, or an asterisk (*) to represent IP addresses of all clients. IPv4 addresses are supported. The mask of an IPv4 address ranges from 1 to 32. A network group name: Contains 1 to 254 characters. Can contain only letters, digits, underscores (_), hyphens (-), and periods (.).
      Permission Level	Indicates the permission level for the clients to access the NFS share. Possible values are: Read-only: The clients can only read files in the NFS share. Read/Write: The clients can read and write files in the NFS share.

   3. Modify advanced client parameters. Click Advanced.
      Table 2 describes related parameters.

      Table 2 Advanced client parameters

      Parameter	Description
      Write Mode	Indicates how the system writes data onto disks. Sync: writes data onto disks instantly. Async: responds to a client's requests first and then writes data onto disks. NOTE: If the value is set to Async, data may be lost when a client and storage system are faulty at the same time. This parameter is displayed only when Permission Level is set to Read/Write.
      Permission Constraint	Indicates whether to retain the user ID (UID) and group ID (GID) of a shared directory. all_squash: The UID and GID of a shared directory are mapped to user nobody, which is applicable to public directories. no_all_squash: retains the UID and GID of a shared directory.
      root Permission Constraint	Controls the root permission of the clients. root_squash: does not allow the clients to access the share as user root. Otherwise, the client will be mapped as an anonymous user. no_root_squash: allows the clients to access the share as user root that has full control and access permissions for shared directories. NOTE: If a VM needs to be created in the NFS share, select no_root_squash. Otherwise, the VM may run abnormally.
      Source Port Verification Constraint	Indicates whether to enable source port verification. secure: allows the clients to access the NFS share using ports 1 to 1023. insecure: allows the clients to access the NFS share using any port.

6. Click OK.
7. Confirm your operation as prompted.