Overview
Protection segments are logical groupings of compute hosts that share a recovery policy. When a host in a segment fails, Instance HA evacuates all protected instances to other healthy hosts within the same segment. Segments are created and managed by administrators. As a project user, you select a segment when enabling protection on an instance.Prerequisites
- An active Xloud account
- At least one failover segment configured by your administrator
- Project access to the Instance HA service
Segment Structure
Hosts
Compute nodes registered in the segment. Instance HA monitors each host and uses
healthy hosts as evacuation targets when a failure occurs.
Recovery Method
The algorithm used to select evacuation targets. Set per-segment by your administrator:
auto, reserved_host, or rh_priority.Reserved Hosts
Designated standby nodes kept idle until a failover event. Only applicable when
the segment uses the
reserved_host or rh_priority method.Status
A segment must be
ENABLED for recovery to trigger automatically. Disabled segments
do not respond to host failure notifications.View Available Segments
- Dashboard
- CLI
Navigate to Instance HA
Log in to the Xloud Dashboard (
https://connect.<your-domain>) and navigate to
Project → Compute → Instance HA → Segments.Review segment list
The segment list displays all protection groups available to your project.
| Column | Description |
|---|---|
| Name | Segment identifier used when enabling instance protection |
| Recovery Method | How instances are relocated after a host failure |
| Hosts | Number of compute hosts registered in this segment |
| Status | ENABLED or DISABLED |
| Description | Optional administrator note about the segment’s purpose |
Check Which Segment Covers Your Instance
- Dashboard
- CLI
Find the instance host
Navigate to Project → Compute → Instances and click your instance name.
Note the Host field — this is the compute node running your instance.
Recovery Method Reference
| Method | Evacuation Target | Capacity Guarantee | Use Case |
|---|---|---|---|
auto | Any available host in the segment | None — depends on current host load | General-purpose workloads |
reserved_host | Reserved standby hosts only | Guaranteed — reserved hosts are idle | SLA-critical, compliance-sensitive workloads |
rh_priority | Reserved hosts first; any host if full | Best-effort with preference | Mixed critical and general workloads |
The recovery method is set by your administrator at the segment level. All instances
in a segment use the same recovery method. If you need a different method for specific
workloads, ask your administrator to create a separate segment.
Validation
Confirm your instance is covered by an active segment.- Dashboard
- CLI
Navigate to Project → Compute → Instance HA → Segments and verify:
- At least one segment has
Status: ENABLED - The compute host running your instance appears in that segment’s host list
Instance is within the fault domain of an active protection segment.
Next Steps
Recovery Workflows
Learn how the recovery engine selects targets and sequences instance evacuation.
Monitoring Status
Track live and historical recovery notifications in the Dashboard and CLI.
How It Works
Understand the end-to-end detection and recovery architecture.
Instance HA Admin Guide
Administrator reference for creating segments and registering compute hosts.