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What Should I Do If the ECS Resources to Be Purchased Are Sold Out? When you are purchasing ECSs, the selected specifications may be sold out. In this case, the specifications cannot be purchased in the current region or AZ. Instance specifications vary in different regions and AZs
How Can I Obtain the Permission to Remotely Log In to a Windows ECS? Symptom When you connect a remote desktop to a Windows ECS, the system prompts that you need to be granted the right to sign in through Remote Desktop Services. Figure 1 Remote login right missing. Solution Open
How Can I Recover a Windows ECS with an Abnormal Virtualization Driver? Background An error occurs in the virtualization driver on a Windows ECS because of improper running of Tools. To ensure proper ECS running, handle this issue by following the instructions provided in this section
How Can I Install a GUI on an ECS Running CentOS 6? Scenarios To provide a pure system, the ECSs running CentOS 6 do not have a GUI installed by default. You can install a GUI on such ECSs as needed. Constraints Before installing a GUI on an ECS, ensure that the idle memory is greater
How Can I Install a GUI on an ECS Running CentOS 7? Scenarios You want to install a GUI on an ECS running CentOS 7 series. Constraints Before installing a GUI on an ECS, ensure that the idle memory is greater than or equal to 2 GB. Otherwise, the GUI installation may fail or the ECS
Why Do I Fail to Connect to a Linux ECS Using WinSCP? Symptom Connecting to a Linux ECS using WinSCP fails, while using SSH tools like Xshell succeeds. Figure 1 Connection error using WinSCP Root Cause If you can connect to a Linux ECS using SSH tools, the SSH tools run properly.
Why Does a Linux ECS with a SCSI Disk Attached Fails to Be Restarted? Symptom For a Linux ECS with a SCSI disk attached, if you have enabled automatic SCSI disk attachment upon ECS startup in /etc/fstab and the disk drive letter (for example, /dev/sdb) is used, the ECS fails to restart
How Can I Obtain the Key Pair Used by My ECS? Symptom You have created multiple key pairs, and you are trying to find the key pair to log in to the target ECS. Procedure Log in to the management console. Click in the upper left corner and select your region and project. Under Compute
How Can I View and Modify Kernel Parameters of a Linux ECS? This document describes common Linux kernel parameters and how to view and modify them. Modify the kernel parameters only if the parameter settings affect your services. If the parameter settings must be modified, perform
What Should I Do If a SAP Application on an ECS Cannot Be Started? Symptom The /etc/hosts file contains "127.0.0.1 host name host name". As a result, the SAP application installed on the ECS cannot be started. You need to log in to the ECS where the SAP application is deployed to
What Should I Do If an ECS Can't Connect to a TaurusDB Instance? Perform the following steps to identify the problem: Check whether the ECS and TaurusDB instance are in the same VPC. If they are in the same VPC, go to 2. If they are in different VPCs, create an ECS in the VPC where
Why Is the ECS IP Address Lost After the System Time Changes? Symptom After the system time changes, an exclamation mark (!) is displayed for the NIC, and the ECS cannot connect to the Internet. Scenarios The operations described in this section apply to ECSs running CentOS 7 or EulerOS
How Do I Disable Login to an ECS Using SSH Password? Scenarios To ensure ECS security, you need to change the access key of an ECS regularly, or disable the SSH password login. This section describes how to disable the SSH password login. After disabling SSH password login, you can
Why Is the IP Address Lost After the System Time of an ECS Is Modified? Symptom After the system time of an ECS is modified, its IP address is lost. Possible Causes The time range you modified exceeds the DHCP lease time. The default DHCP lease time set when you create a VPC subnet
How Do I Troubleshoot an Unresponsive Website Hosted on My ECS? Symptom Websites running on an ECS might become unreachable for multiple reasons. Check whether the configurations of network, port, firewall, or security group of the ECS are correct. Fault Locating If an error is displayed
How Can I Obtain the Permission to Remotely Log In to a Windows ECS? Symptom When you connect a remote desktop to a Windows ECS, the system prompts that you need to be granted the right to sign in through Remote Desktop Services. Figure 1 Remote login right missing. Solution Open
What OSs Are Supported If I Want to Install Docker on a Linux ECS? If you want to install Docker on your Linux ECS, ensure that the OS of your ECS is supported by Docker. Table 1 lists the OSs supported by Docker. Table 1 OSs supported by Docker OS Version Location CentOS CentOS 7
How Do I Access an ECS with an EIP Bound from the Internet? Each ECS is automatically added to a security group after being created to ensure its security. The security group denies access traffic from the Internet by default (except TCP traffic from port 22 through SSH to a Linux
How Do I Migrate an ECS from One Account to Another? To migrate an ECS from one account to another, perform the following operations: Install the Agent on the ECS under the original account, but when starting the Agent, enter the AK/SK pair of the destination account. To learn how
How Do I Migrate ECS Data Across Regions Using CSBS? Context A user has an ECS with only one system disk in CN South-Guangzhou. To implement cross-region DR and fast service deployment in a different region, the user needs to create a same ECS with the same data in that region. In
