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HA-Lizard Software
Current Version 2.2.3



HA-lizard provides complete automation for managing Xen server pools which utilize the XAPI management interface and toolstack (as in Xen Cloud Platform and XenServer). This hyper-converged software suite provides complete HA features within a given pool. The overall design is intended to be lightweight with no compromise of system stability. Traditional cluster management suites are not required. HA is provided with built-in logic for detecting and recovering failed services and hosts.xencenter screenshoot

HA features provided:


  • Auto-start of any failed VMs
  • Auto-start of any VMs on host boot
  • Detection of failed hosts and automated recovery of any affected VMs
  • Detect and clean up orphaned resources after a failed host is removed
  • Removal of any failed hosts from the pool with a takeover of services
  • Fencing support for HP ILO, XVM, and POOL fencing (forceful removal of the host from the pool)
  • Split-brain prevention using heuristics from external network points and quorum
  • HA support for pools with two hosts
  • Structured interface for simple “bolt-on” of fencing scripts
  • Dual operating modes for applying HA to appliances or individual VMs
  • Ability to exclude selected appliances and VMs from HA logic
  • Auto-detection of host status allows for safely working on hosts without disabling HA
  • Centralized configuration for the entire pool stored in XAPI database
  • Command-line tool for managing global configuration parameters
  • Parameter override available per host for custom configurations
  • HA can be enabled/disabled via a command-line tool or graphical interface (like XenCenter)
  • Extensive Logging capabilities to the system log file
  • Email alerting on configurable triggers
  • Dynamic cluster management logic auto-selects roles and determines recovery policy
  • No changes to the existing pool configuration required. All logic is external
  • No dependencies – does not compromise pool stability or introduce complex SW packages.
  • Designed to work with the resident packages on a standard XCP/XenServer host


HA-Lizard Xensever High Availability Application Drawing

 (click drawing for larger view)

Development is well tested and based on Xen Cloud Platform (XCP) version 1.6 and XenServer 6.1/6.2/6.5/7.x/8.x


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