Health checks for load balancing
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:
|Initial state, host entered and active but health unknown.
When health checks are disabled, protected web resources never leave this state.
|Host is responding based on health check settings.
|Host isn't responding; new requests won't be routed to it.
Health check fields
|URI to resource used in health check.
|HTTP method used.
|HTTP status code used to determine health.
|Interval between health checks in seconds.
|Health check request timeout in seconds.
|Number of successful requests before a host is considered healthy.
|Number of failed requests before a host is considered unhealthy.