.. _config_cluster_manager_cluster_runtime: Runtime ======= Upstream clusters support the following runtime settings: Active health checking ---------------------- health_check.min_interval Min value for the health checking :ref:`interval <envoy_v3_api_field_config.core.v3.HealthCheck.interval>`. Default value is 1 ms. The effective health check interval will be no less than 1ms. The health checking interval will be between *min_interval* and *max_interval*. health_check.max_interval Max value for the health checking :ref:`interval <envoy_v3_api_field_config.core.v3.HealthCheck.interval>`. Default value is MAX_INT. The effective health check interval will be no less than 1ms. The health checking interval will be between *min_interval* and *max_interval*. health_check.verify_cluster What % of health check requests will be verified against the :ref:`expected upstream service <envoy_v3_api_field_config.core.v3.HealthCheck.HttpHealthCheck.service_name_matcher>` as the :ref:`health check filter <arch_overview_health_checking_filter>` will write the remote service cluster into the response. .. _config_cluster_manager_cluster_runtime_outlier_detection: Outlier detection ----------------- See the outlier detection :ref:`architecture overview <arch_overview_outlier_detection>` for more information on outlier detection. The runtime parameters supported by outlier detection are the same as the :ref:`static configuration parameters <envoy_v3_api_msg_config.cluster.v3.OutlierDetection>`, namely: outlier_detection.consecutive_5xx :ref:`consecutive_5XX <envoy_v3_api_field_config.cluster.v3.OutlierDetection.consecutive_5xx>` setting in outlier detection outlier_detection.consecutive_gateway_failure :ref:`consecutive_gateway_failure <envoy_v3_api_field_config.cluster.v3.OutlierDetection.consecutive_gateway_failure>` setting in outlier detection outlier_detection.consecutive_local_origin_failure :ref:`consecutive_local_origin_failure <envoy_v3_api_field_config.cluster.v3.OutlierDetection.consecutive_local_origin_failure>` setting in outlier detection outlier_detection.interval_ms :ref:`interval <envoy_v3_api_field_config.cluster.v3.OutlierDetection.interval>` setting in outlier detection outlier_detection.base_ejection_time_ms :ref:`base_ejection_time <envoy_v3_api_field_config.cluster.v3.OutlierDetection.base_ejection_time>` setting in outlier detection outlier_detection.max_ejection_percent :ref:`max_ejection_percent <envoy_v3_api_field_config.cluster.v3.OutlierDetection.max_ejection_percent>` setting in outlier detection outlier_detection.enforcing_consecutive_5xx :ref:`enforcing_consecutive_5xx <envoy_v3_api_field_config.cluster.v3.OutlierDetection.enforcing_consecutive_5xx>` setting in outlier detection outlier_detection.enforcing_consecutive_gateway_failure :ref:`enforcing_consecutive_gateway_failure <envoy_v3_api_field_config.cluster.v3.OutlierDetection.enforcing_consecutive_gateway_failure>` setting in outlier detection outlier_detection.enforcing_consecutive_local_origin_failure :ref:`enforcing_consecutive_local_origin_failure <envoy_v3_api_field_config.cluster.v3.OutlierDetection.enforcing_consecutive_local_origin_failure>` setting in outlier detection outlier_detection.enforcing_success_rate :ref:`enforcing_success_rate <envoy_v3_api_field_config.cluster.v3.OutlierDetection.enforcing_success_rate>` setting in outlier detection outlier_detection.enforcing_local_origin_success_rate :ref:`enforcing_local_origin_success_rate <envoy_v3_api_field_config.cluster.v3.OutlierDetection.enforcing_local_origin_success_rate>` setting in outlier detection outlier_detection.success_rate_minimum_hosts :ref:`success_rate_minimum_hosts <envoy_v3_api_field_config.cluster.v3.OutlierDetection.success_rate_minimum_hosts>` setting in outlier detection outlier_detection.success_rate_request_volume :ref:`success_rate_request_volume <envoy_v3_api_field_config.cluster.v3.OutlierDetection.success_rate_request_volume>` setting in outlier detection outlier_detection.success_rate_stdev_factor :ref:`success_rate_stdev_factor <envoy_v3_api_field_config.cluster.v3.OutlierDetection.success_rate_stdev_factor>` setting in outlier detection outlier_detection.enforcing_failure_percentage :ref:`enforcing_failure_percentage <envoy_v3_api_field_config.cluster.v3.OutlierDetection.enforcing_failure_percentage>` setting in outlier detection outlier_detection.enforcing_failure_percentage_local_origin :ref:`enforcing_failure_percentage_local_origin <envoy_v3_api_field_config.cluster.v3.OutlierDetection.enforcing_failure_percentage_local_origin>` setting in outlier detection outlier_detection.failure_percentage_request_volume :ref:`failure_percentage_request_volume <envoy_v3_api_field_config.cluster.v3.OutlierDetection.failure_percentage_request_volume>` setting in outlier detection outlier_detection.failure_percentage_minimum_hosts :ref:`failure_percentage_minimum_hosts <envoy_v3_api_field_config.cluster.v3.OutlierDetection.failure_percentage_minimum_hosts>` setting in outlier detection outlier_detection.failure_percentage_threshold :ref:`failure_percentage_threshold <envoy_v3_api_field_config.cluster.v3.OutlierDetection.failure_percentage_threshold>` setting in outlier detection outlier_detection.max_ejection_time_ms :ref:`max_ejection_time <envoy_v3_api_field_config.cluster.v3.OutlierDetection.max_ejection_time>` setting in outlier detection outlier_detection.max_ejection_time_jitter_ms :ref:`base_ejection_time <envoy_v3_api_field_config.cluster.v3.OutlierDetection.max_ejection_time_jitter>` setting in outlier detection Core ---- upstream.healthy_panic_threshold Sets the :ref:`panic threshold <arch_overview_load_balancing_panic_threshold>` percentage. Defaults to 50%. upstream.use_http2 Whether the cluster uses ``HTTP/2`` if configured in `HttpProtocolOptions <envoy_v3_msg_config.upstreams.http.v3.HttpProtocolOptions>`. Set to 0 to disable HTTP/2 even if the feature is configured. Defaults to enabled. upstream.use_http3 Whether the cluster uses ``HTTP/3`` if configured in `HttpProtocolOptions <envoy_v3_msg_config.upstreams.http.v3.HttpProtocolOptions>`. Set to 0 to disable HTTP/3 even if the feature is configured. Defaults to enabled. .. _config_cluster_manager_cluster_runtime_zone_routing: Zone aware load balancing ------------------------- upstream.zone_routing.enabled % of requests that will be routed to the same upstream zone. Defaults to 100% of requests. upstream.zone_routing.min_cluster_size Minimal size of the upstream cluster for which zone aware routing can be attempted. Default value is 6. If the upstream cluster size is smaller than *min_cluster_size* zone aware routing will not be performed. Circuit breaking ---------------- circuit_breakers.<cluster_name>.<priority>.max_connections :ref:`Max connections circuit breaker setting <envoy_v3_api_field_config.cluster.v3.CircuitBreakers.Thresholds.max_connections>` circuit_breakers.<cluster_name>.<priority>.max_pending_requests :ref:`Max pending requests circuit breaker setting <envoy_v3_api_field_config.cluster.v3.CircuitBreakers.Thresholds.max_pending_requests>` circuit_breakers.<cluster_name>.<priority>.max_requests :ref:`Max requests circuit breaker setting <envoy_v3_api_field_config.cluster.v3.CircuitBreakers.Thresholds.max_requests>` circuit_breakers.<cluster_name>.<priority>.max_retries :ref:`Max retries circuit breaker setting <envoy_v3_api_field_config.cluster.v3.CircuitBreakers.Thresholds.max_retries>` circuit_breakers.<cluster_name>.<priority>.retry_budget.budget_percent :ref:`Max retries circuit breaker setting <envoy_v3_api_field_config.cluster.v3.CircuitBreakers.Thresholds.RetryBudget.budget_percent>` circuit_breakers.<cluster_name>.<priority>.retry_budget.min_retry_concurrency :ref:`Max retries circuit breaker setting <envoy_v3_api_field_config.cluster.v3.CircuitBreakers.Thresholds.RetryBudget.min_retry_concurrency>`