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What Should I Do If the ECS and DDS Are Deployed in Different VPCs and They Cannot Communicate with Each Other? Change the VPC hosting the ECS to the same as that hosting the DDS by referring to Changing a VPC. Create a VPC peering connection. For details, see VPC Peering Connection
What Should I Do If an ECS Error Occurs When I Create and Deploy a Component on a VM? Symptom The ECS service may be unavailable when you create and deploy a component on a ServiceStage VM. For example, calling the ECS interface times out during component deployment, and the following
Can I Change the Specifications Defined by a Private Image When I Use the Image to Create an ECS? Yes. You can specify the CPU, memory, bandwidth, system and data disks of the ECS you are creating. The system disk must be smaller than 1,024 GB but no less than the system disk capacity
Is There Any Difference Between the Image Created from a CSBS/CBR Backup and That Created from an ECS? No. You can create a full-ECS image from an ECS, a CSBS backup, or a CBR backup. When you create a full-ECS image from an ECS, the system first creates a backup for the ECS and then
How Do I Change Default DNS Servers of an ECS to Huawei Cloud Private DNS Servers? Huawei Cloud provides private DNS servers for domain name resolution. ECSs use public domain names to access the Internet, but use private domain names to access cloud services like OBS and SMN, with
What Should I Do If an ECS Cannot Connect to an RDS DB Instance Through a Private Network? Perform the following steps to identify the problem: Check whether the ECS and RDS DB instances are located in the same VPC. If they are in the same VPC, go to 2. If they are in different VPCs
What Should I Do If an ECS Cannot Connect to an RDS for PostgreSQL Instance Through a Private Network? Perform the following steps to identify the problem: Check whether the ECS and RDS for PostgreSQL instance are located in the same VPC. If they are in the same VPC, go to 2. If they
What Should I Do If an ECS Cannot Connect to an RDS for MariaDB Instance over a Private Network? Perform the following steps to identify the problem: Check whether the ECS and RDS for MariaDB instance are located in the same VPC. If they are in the same VPC, go to 2. If they are in
What Should I Do If I Can't Connect to My ECS (PostgreSQL) Instance? Error message: Connection refused (Connection refused). Error cause: The port number of the self-built database is incorrect, or the network is disconnected. Solution: Ensure that the port number of the self-built
What Should I Do If I Can't Connect to My ECS (MySQL) Instance? Error message: Access denied for user 'user_name'@'100.xxx.xx.xx' (using password: YES) Error cause: The username or password of the ECS-hosted database is incorrect. Solution: Check whether the username and password
Why Are Two deleteMetadata Traces Generated When I Buy an ECS in Pay-per-Use or Yearly/Monthly? During ECS creation, metadata is used to store temporary information. When the creation is finished, the information is automatically deleted. Thus, two traces named deleteMetadata are
Manually Configuring IPv4 and IPv6 Policy-based Routes for a Linux ECS with Multiple Network Interfaces (CentOS) Scenarios This section describes how to configure policy-based routes for a CentOS 8.0 64-bit ECS with two network interfaces. IPv4: If IPv4 communication between cloud
Manually Configuring IPv4 and IPv6 Policy-based Routes for a Linux ECS with Multiple Network Interfaces (Ubuntu) Scenarios This section describes how to configure policy-based routes for an Ubuntu 22.04 server 64-bit ECS with two network interfaces. IPv4: If IPv4 communication between
Why Can't I Obtain the Password for Logging In to My Windows ECS Authenticated Using a Key Pair? Symptom A private key cannot be used to obtain the password for logging in to a Windows ECS that is authenticated using a key pair. Possible Causes The password fails to inject using Cloudbase-Init
How Can I Use WinSCP to Transfer Files from a Local Windows Computer to a Linux ECS? Scenarios WinSCP can be used to securely copy-paste files across local and remote computers. Compared with FTP, WinSCP allows you to use a username and password to access the destination server without
How Can I Use SFTP to Transfer Files Between a Local Linux Computer and a Linux ECS? Scenarios You want to use SFTP to transfer files between a local Linux computer and a Linux ECS. The following uses CentOS as an example. Procedure Log in to the ECS as user root. Run the following
Why Does an ECS Fail to Be Remotely Connected Using RDP and Internal Error Code 4 Is Displayed? Symptom An internal error is displayed when you log in to a Windows ECS and you fail to connect to the ECS remotely. Generally, this problem occurs because the Remote Desktop Services is
What Should I Do If I Cannot View Data After Logging In to an ECS Using VNC? After you log in to an ECS using VNC and view data, for example, play videos or run the cat command to view large files in Linux OSs, VNC may become unavailable due to the high memory usage of the browser
What Should I Do If Executing a Driver Installation Script Failed on an ECS Running CentOS 5? Scenarios After executing the script for installing the Virtio driver on an ECS running CentOS 5, users cannot determine whether the driver has been successfully installed. This section describes
How Can I Use OBS to Transfer Files from a Local Windows Computer to a Windows ECS? Scenarios Through an intranet, an ECS can access OBS in which any type of data can be stored. After storing data such as images and videos in OBS, you can access OBS from the ECS and download data
