Help Center/ Cloud Backup and Recovery/ Troubleshooting/ Failed to Download or Install the Agent Required by Application-Consistent
Updated on 2026-10-26 GMT+08:00
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Failed to Download or Install the Agent Required by Application-Consistent

Symptom

The system displays a message indicating that the script cannot be downloaded or the Agent fails to be installed using Linux method 2.

Possible Causes

  • The DNS cannot resolve the OBS domain name.
  • The OpenSSL version installed on the target server is outdated.

Solution (When the DNS Cannot Resolve the OBS Domain Name)

The DNS cannot resolve the OBS domain name.

You need to manually change the DNS server address to a private DNS server address of Huawei Cloud by referring to What Are the Private DNS Server Addresses Provided by the DNS Service? If the problem persists, try later or use the Linux mode 1 to install it.

Procedure (Linux)

  1. Log in to the server as the root user.
  2. Run the vi /etc/resolv.conf command to edit the /etc/resolv.conf file. Add the DNS server IP address above the existing name server information, as shown in Figure 1.

    Figure 1 Configuring DNS
    The format is as follows: 
    nameserver 100.125.1.250
nameserver 100.125.17.29

  3. Press Esc, input :wq, and press Enter to save the changes and exit the vi editor.
  4. Run the following command to verify that the IP address is successfully written to the file and the DNS configuration modification is complete:

    cat /etc/resolv.conf

Procedure (Windows)

  1. Go to the ECS console and log in to the Windows ECS. The following uses Windows Server 2012 as an example. The operations for other versions are similar.
  2. Click This PC in the lower left corner.
  3. On the page that is displayed, right-click Network and choose Properties from the drop-down list. The Network and Sharing Center page is displayed, as shown in Figure 2. Click Local Area Connection.

    Figure 2 Page for network and sharing center

  4. In the Activity area, select Properties. See Figure 3.

    Figure 3 Local area connection

  5. In the Local Area Connection Properties dialog box that is displayed, select Internet Protocol Version 4 (TCP/IPv4) and click Properties. See Figure 4.

    Figure 4 Local area connection properties

  6. In the dialog box that is displayed, select Use the following DNS server addresses: and configure DNS, as shown in Figure 5. You need to manually change the DNS server address to a private DNS server address of Huawei Cloud by referring to What Are the Private DNS Server Addresses Provided by the DNS Service? Then click OK.

    Figure 5 Configuring DNS

Solution for Cause 2

Cause 2: The OpenSSL version of the target server is too early.

  1. Use a remote management tool (such as PuTTY or Xshell) to connect to your ECS through the elastic IP address.
  2. Select the corresponding Agent version, copy the installation command from method 2 to the server, change https in the wget command to http, and run the command as root.