func()

in agent/healthcheck/health_check.go [193:223]

• 24 lines of code
• 6 McCabe index (conditional complexity)

func (healthStatus *HealthStatus) computeHealthCheck(agentConfig config.AgentConfig) {
	// If Envoy is not in LIVE state (not initialized or not ready), it is reported as Unhealthy.
	// If Envoy is initialized but if there are failures in the initial config creation (leading to partial resources creation),
	// it is reported as Unhealthy.
	// Disconnection from Control plane (Applicable only when not using Relay Mode):
	// - Even when initialized, Envoy is statically stable and hence continue to report healthy.
	// - To prevent Envoy from getting stuck in a disconnected state, we define a configurable threshold crossing which
	//   it starts reporting unhealthy.
	switch healthStatus.EnvoyState {
	case LIVE:
		if healthStatus.InitialConfigUpdateStatus == UPDATE_FAILED {
			healthStatus.HealthStatus = Unhealthy
			break
		}
		if agentConfig.EnableRelayModeForXds {
			healthStatus.HealthStatus = Healthy
			break
		}
		if healthStatus.ManagementServerConnectionStatus == connected {
			healthStatus.HealthStatus = Healthy
		} else {
			if time.Since(*healthStatus.ManagementServerDisconnectedTimestamp) < agentConfig.HcDisconnectedTimeout {
				healthStatus.HealthStatus = Healthy
			} else {
				healthStatus.HealthStatus = Unhealthy
			}
		}
	default:
		healthStatus.HealthStatus = Unhealthy
	}
}