Simple Application Server:Extend a data disk

1. Connect to the Linux server.

   For more information, see Connect to a Linux server.

2. Run the following command to switch to the root user:

   sudo su root

3. View the disk and partition of the simple application server.

   1. Run the following command to view the disks of the simple application server:

      fdisk -lu

      Extending the data disk does not affect the size of the system disk. The following figure shows only the information about the data disk (/dev/vdb). Elements in the preceding figure:

      • Squared area labeled ①: indicates the new data disk size after the/dev/vdb data disk is extended.

      • Squared area labeled ②: The information below Device indicates that the partition name of the data disk is /dev/vdb1, and the information below System indicates that the partition style of the data disk is GUID Partition Table (GPT).

   2. Run the following command to view information about the partition:

      df -Th

      The default file system type of the /dev/vdb1 data disk partition on the Simple Application Server is ext4. The following figure shows the command output, which indicates that the file system of the data disk partition remains 40 GB in size. You must extend the partition and file system to extend the data disk.

4. Extend the partition.

   1. Run the following command to install the gdisk utility.

      If the partition is in the GPT format, you must perform this step. If the partition is in the Master Boot Record (MBR) format, skip this step.

      yum install gdisk -y

   2. Run the following command to install the growpart utility.

      The commands that are used to install the growpart utility vary based on the operating system of the simple application server.

      • If the simple application server runs CentOS 7 or later, run the following command:

        yum install -y cloud-utils-growpart

        Note

        CentOS 8 has reached its end of life (EOL). If your simple application server runs a CentOS 8 operating system, change the CentOS 8 repository address.Simple Application Server For more information, see Change CentOS 8 repository addresses.

      • If the simple application server runs Debian 9 or later, or Ubuntu 14 or later, run the following commands in sequence.

        Run the following command to update the software repository:

        apt-get update

        Run the following command to install cloud-guest-utils:

        apt-get install -y cloud-guest-utils

   3. Run the following command to extend the partition.

      Note

      Use a space to separate /dev/vdb and 1 in the command.

      growpart /dev/vdb 1

      The following command output is returned:

      [root@iZbp1h6se7u09oqdmea**** admin]# growpart /dev/vdb 1
      CHANGED: partition=1 start=2048 old: size=83881984 end=83884032 new: size=125827038 end=125829086

      If an error occurs when the command is run, troubleshoot the issue. For more information, see Step 1: Resize a disk to extend the capacity of the disk.

5. Extend the file system.

   The default file system type of the /dev/vdb1 data disk partition on the simple application server is ext4. This step describes how to extend an ext4 file system.Simple Application Server

   1. Run the following command to extend the file system:

      resize2fs /dev/vdb1

   2. Run the following command to check whether the file system is extended:

      df -Th

      If the file system is 60 GB in size as shown in the following figure, the file system is extended. After you extend the data disk, check whether the actual size of the data disk is the expected size.

      • If the business programs on the simple application server run as expected, the data disk is extended.

      • If the business programs on the simple application server do not run as expected, the data disk is not extended. Use the snapshot that you created in Step 1 to roll back the disk. For more information, see the Create a snapshot section of the "Manage snapshots" topic.

In the following example, a simple application server that runs a Windows Server 2012 R2 64-bit operating system is used. The data disk is extended from 40 GB to 60 GB.

1. Connect to the Windows server whose data disk you extended in the Simple Application Server console.

   For more information, see Connect to a Windows server.

2. In the lower-left corner of the Windows desktop, right-click the icon and click Disk Management.

   

3. In the Disk Management dialog box, choose Action > Rescan Disks to view the unallocated disk size.

   

   Disk 1 is the data disk.

4. Right-click the blank space in the Disk 1 section and select Extend Volume...

   

5. In the Extend Volume Wizard dialog box, use the default settings to extend the volume.

   The new space is automatically added to the original volume, as shown in the following figure.

   After you extend the data disk, check whether the actual size of the data disk is the expected size.

   • If the business programs on the simple application server run as expected, the data disk is extended.

   • If the business programs on the simple application server do not run as expected, the data disk is not extended. Use the snapshot that you created in Step 1 to roll back the disk. For more information, see the Create a snapshot section of the "Manage snapshots" topic.