Issue/Introduction

This article describes how to troubleshoot a VM instance that is automatically paused. It applies to the initial diagnosis and resolution of similar issues in ZStack Cloud.

Environment

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

Possible causes

When a local storage volume, the host system volume, or primary storage runs out of capacity, the resulting VM instance I/O error causes the VM instance to be paused automatically.

Resolution

• Log in to the host and run virsh domblkerror $vm_uuid to view details.

• If a local storage volume is full, you can release host space on the corresponding primary storage as needed by removing unused workload VM instances or volumes, or by deleting logs.
• If the host system volume is full, delete unnecessary files or logs.
• If primary storage is full, delete unused workload VM instances or volumes.