syntax = "proto3";

package envoy.api.v2.cluster;

import "google/protobuf/duration.proto";
import "google/protobuf/wrappers.proto";

import "udpa/annotations/migrate.proto";
import "udpa/annotations/status.proto";
import "validate/validate.proto";

option java_package = "io.envoyproxy.envoy.api.v2.cluster";
option java_outer_classname = "OutlierDetectionProto";
option java_multiple_files = true;
option go_package = "github.com/envoyproxy/go-control-plane/envoy/api/v2/cluster";
option csharp_namespace = "Envoy.Api.V2.ClusterNS";
option ruby_package = "Envoy::Api::V2::ClusterNS";
option (udpa.annotations.file_migrate).move_to_package = "envoy.config.cluster.v3";
option (udpa.annotations.file_status).package_version_status = FROZEN;

// [#protodoc-title: Outlier detection]

// See the :ref:`architecture overview <arch_overview_outlier_detection>` for
// more information on outlier detection.
// [#next-free-field: 21]
message OutlierDetection {
  // The number of consecutive server-side error responses (for HTTP traffic,
  // 5xx responses; for TCP traffic, connection failures; for Redis, failure to
  // respond PONG; etc.) before a consecutive 5xx ejection occurs. Defaults to 5.
  google.protobuf.UInt32Value consecutive_5xx = 1;

  // The time interval between ejection analysis sweeps. This can result in
  // both new ejections as well as hosts being returned to service. Defaults
  // to 10000ms or 10s.
  google.protobuf.Duration interval = 2 [(validate.rules).duration = {gt {}}];

  // The base time that a host is ejected for. The real time is equal to the
  // base time multiplied by the number of times the host has been ejected.
  // Defaults to 30000ms or 30s.
  google.protobuf.Duration base_ejection_time = 3 [(validate.rules).duration = {gt {}}];

  // The maximum % of an upstream cluster that can be ejected due to outlier
  // detection. Defaults to 10% but will eject at least one host regardless of the value.
  google.protobuf.UInt32Value max_ejection_percent = 4 [(validate.rules).uint32 = {lte: 100}];

  // The % chance that a host will be actually ejected when an outlier status
  // is detected through consecutive 5xx. This setting can be used to disable
  // ejection or to ramp it up slowly. Defaults to 100.
  google.protobuf.UInt32Value enforcing_consecutive_5xx = 5 [(validate.rules).uint32 = {lte: 100}];

  // The % chance that a host will be actually ejected when an outlier status
  // is detected through success rate statistics. This setting can be used to
  // disable ejection or to ramp it up slowly. Defaults to 100.
  google.protobuf.UInt32Value enforcing_success_rate = 6 [(validate.rules).uint32 = {lte: 100}];

  // The number of hosts in a cluster that must have enough request volume to
  // detect success rate outliers. If the number of hosts is less than this
  // setting, outlier detection via success rate statistics is not performed
  // for any host in the cluster. Defaults to 5.
  google.protobuf.UInt32Value success_rate_minimum_hosts = 7;

  // The minimum number of total requests that must be collected in one
  // interval (as defined by the interval duration above) to include this host
  // in success rate based outlier detection. If the volume is lower than this
  // setting, outlier detection via success rate statistics is not performed
  // for that host. Defaults to 100.
  google.protobuf.UInt32Value success_rate_request_volume = 8;

  // This factor is used to determine the ejection threshold for success rate
  // outlier ejection. The ejection threshold is the difference between the
  // mean success rate, and the product of this factor and the standard
  // deviation of the mean success rate: mean - (stdev *
  // success_rate_stdev_factor). This factor is divided by a thousand to get a
  // double. That is, if the desired factor is 1.9, the runtime value should
  // be 1900. Defaults to 1900.
  google.protobuf.UInt32Value success_rate_stdev_factor = 9;

  // The number of consecutive gateway failures (502, 503, 504 status codes)
  // before a consecutive gateway failure ejection occurs. Defaults to 5.
  google.protobuf.UInt32Value consecutive_gateway_failure = 10;

  // The % chance that a host will be actually ejected when an outlier status
  // is detected through consecutive gateway failures. This setting can be
  // used to disable ejection or to ramp it up slowly. Defaults to 0.
  google.protobuf.UInt32Value enforcing_consecutive_gateway_failure = 11
      [(validate.rules).uint32 = {lte: 100}];

  // Determines whether to distinguish local origin failures from external errors. If set to true
  // the following configuration parameters are taken into account:
  // :ref:`consecutive_local_origin_failure<envoy_api_field_cluster.OutlierDetection.consecutive_local_origin_failure>`,
  // :ref:`enforcing_consecutive_local_origin_failure<envoy_api_field_cluster.OutlierDetection.enforcing_consecutive_local_origin_failure>`
  // and
  // :ref:`enforcing_local_origin_success_rate<envoy_api_field_cluster.OutlierDetection.enforcing_local_origin_success_rate>`.
  // Defaults to false.
  bool split_external_local_origin_errors = 12;

  // The number of consecutive locally originated failures before ejection
  // occurs. Defaults to 5. Parameter takes effect only when
  // :ref:`split_external_local_origin_errors<envoy_api_field_cluster.OutlierDetection.split_external_local_origin_errors>`
  // is set to true.
  google.protobuf.UInt32Value consecutive_local_origin_failure = 13;

  // The % chance that a host will be actually ejected when an outlier status
  // is detected through consecutive locally originated failures. This setting can be
  // used to disable ejection or to ramp it up slowly. Defaults to 100.
  // Parameter takes effect only when
  // :ref:`split_external_local_origin_errors<envoy_api_field_cluster.OutlierDetection.split_external_local_origin_errors>`
  // is set to true.
  google.protobuf.UInt32Value enforcing_consecutive_local_origin_failure = 14
      [(validate.rules).uint32 = {lte: 100}];

  // The % chance that a host will be actually ejected when an outlier status
  // is detected through success rate statistics for locally originated errors.
  // This setting can be used to disable ejection or to ramp it up slowly. Defaults to 100.
  // Parameter takes effect only when
  // :ref:`split_external_local_origin_errors<envoy_api_field_cluster.OutlierDetection.split_external_local_origin_errors>`
  // is set to true.
  google.protobuf.UInt32Value enforcing_local_origin_success_rate = 15
      [(validate.rules).uint32 = {lte: 100}];

  // The failure percentage to use when determining failure percentage-based outlier detection. If
  // the failure percentage of a given host is greater than or equal to this value, it will be
  // ejected. Defaults to 85.
  google.protobuf.UInt32Value failure_percentage_threshold = 16
      [(validate.rules).uint32 = {lte: 100}];

  // The % chance that a host will be actually ejected when an outlier status is detected through
  // failure percentage statistics. This setting can be used to disable ejection or to ramp it up
  // slowly. Defaults to 0.
  //
  // [#next-major-version: setting this without setting failure_percentage_threshold should be
  // invalid in v4.]
  google.protobuf.UInt32Value enforcing_failure_percentage = 17
      [(validate.rules).uint32 = {lte: 100}];

  // The % chance that a host will be actually ejected when an outlier status is detected through
  // local-origin failure percentage statistics. This setting can be used to disable ejection or to
  // ramp it up slowly. Defaults to 0.
  google.protobuf.UInt32Value enforcing_failure_percentage_local_origin = 18
      [(validate.rules).uint32 = {lte: 100}];

  // The minimum number of hosts in a cluster in order to perform failure percentage-based ejection.
  // If the total number of hosts in the cluster is less than this value, failure percentage-based
  // ejection will not be performed. Defaults to 5.
  google.protobuf.UInt32Value failure_percentage_minimum_hosts = 19;

  // The minimum number of total requests that must be collected in one interval (as defined by the
  // interval duration above) to perform failure percentage-based ejection for this host. If the
  // volume is lower than this setting, failure percentage-based ejection will not be performed for
  // this host. Defaults to 50.
  google.protobuf.UInt32Value failure_percentage_request_volume = 20;
}