high-availability

Manage Proxmox VE HA clusters for automatic VM and container failover.

Updated Mar 6, 2026

Search Tags:#high availability #failover #container #vm #proxmox #clustering

Ready to run

npx skills add https://github.com/renne/skills --skill high-availability

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: high-availability
Source: https://github.com/renne/skills/tree/main/proxmox/high-availability
Command: npx skills add https://github.com/renne/skills --skill high-availability

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill ensures that your virtual machines and containers remain available even if a Proxmox VE node fails, by automatically restarting them on healthy nodes.

Core Features & Use Cases

Automatic Failover: Restarts VMs and containers on other nodes when a host fails.
Fencing Configuration: Manages STONITH devices to prevent data corruption from failed nodes.
HA Resource Management: Allows configuration of HA for specific VMs/CTs, including restart and relocation counts.
HA Groups: Enables defining node preferences and constraints for HA resources.
Use Case: Configure your critical production VMs to automatically failover to a standby node if their current host experiences a hardware failure, minimizing downtime.

Quick Start

Use the high-availability skill to enable HA for VM with ID 101.

Frequently Asked Questions about high-availability

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I configure automatic failover for VMs in a Proxmox VE cluster?▼

Proxmox VE HA uses a fencing mechanism managed by STONITH devices to prevent data corruption from failed nodes. When a host fails, the fencing mechanism ensures the failed node is completely powered off before its VMs and containers are restarted on healthy nodes.

What are HA groups used for in Proxmox VE High Availability?▼

HA groups in Proxmox VE High Availability are used to define node preferences and constraints for HA resources. This allows you to specify which healthy nodes should be prioritized for restarting specific VMs and containers during a failover event.

Do I need STONITH devices to enable container failover in Proxmox VE?▼

Yes, STONITH devices are required for container failover in Proxmox VE to properly manage fencing mechanisms. Fencing ensures that a failed node is completely isolated and powered off, preventing data corruption before its workloads are restarted elsewhere.

How do I test failover scenarios for a Proxmox VE HA cluster?▼

Testing failover scenarios for a Proxmox VE HA cluster involves simulating a node failure to verify that the HA manager automatically restarts the affected VMs and containers on surviving nodes according to the configured resource agent and HA group preferences.