SSH sign-in to a VM instance fails

Issue/Introduction

An SSH sign-in failure for a VM instance can have multiple symptoms and causes. Identify the applicable symptom and cause, and then try the corresponding resolution.

Environment

• Product: ZCF
• Component: Cloud
• Version: 3.x-5.5.30

Symptoms

An SSH sign-in failure for a VM instance generally has one of the following three symptoms:

• Symptom 1: The root user cannot sign in to the VM instance through SSH.
• Symptom 2: An SSH connection to a workload VM instance fails and the error