Overview
Many causes can lead to CVM login failure. Causes that can be monitored by Tencent Cloud Observability Platform include overly high CVM bandwidth usage and overly high CVM CPU/memory usage. This document describes how to troubleshoot these two causes.
Problem Analysis
The following causes of CVM login failure can be detected by Tencent Cloud Observability Platform:
Note:
Before troubleshooting, check whether the login attempt failed because the entered password was incorrect, you forgot the password, or the password failed to reset.
If yes, reset the password. Solutions
CVM bandwidth utilization is too high
Problem: the self-diagnosis tool shows that bandwidth utilization is too high.
Solutions:
1. Log in to the CVM instance via VNC.
CVM CPU/memory usage is too high
Problem: the self-diagnosis tool or Tencent Cloud Observability Platform shows that the CPU/memory usage of the CVM instance is too high, and therefore the system cannot establish a remote connection or the connectivity is poor.
Possible causes: viruses, trojans, third-party anti-virus software, application exceptions, driver exceptions, and automatic software backend updates may lead to high CPU usage, resulting in CVM login failure or slow access.
Solutions:
1. Log in to the CVM instance via VNC.