Load balancing health checks
Available since Access Gateway version 2022.2.3
Access Gateway load balanced protected resources can be managed automatically using health checks. Load balancing health checks:
- Are optional when configuring Access Gateway load balancing.
- Are disabled by default.
- Use HTTP Get operations to determine back end resource health.
- Can be configured in terms of expected HTTP return code, test interval, time-outs and more.
Protected web resources can be in one of three states:
|Active||Initial state, host entered and active but health unknown.
When health checks are disabled, protected web resources never leave this state.
|Healthy||Host is responding based on health check settings.|
|Unhealthy||Host isn't responding; new requests won't be routed to it.|
Health check fields
|Path||URI to resource used in health check.||/|
|Method||HTTP method used.||Always GET|
|Status code||HTTP status code used to determine health.||200|
|Interval||Interval between health checks in seconds.||10|
|Request timeout||Health check request timeout in seconds.||1|
|Healthy threshold||Number of successful requests before a host is considered healthy.||3|
|Unhealthy threshold||Number of failed requests before a host is considered unhealthy.||3|